{"content_id":"jvbg0cqrxc","slug":"year-end-tax-adjustment-correction-claim-five-year-deadline","locale":"en","schema_type":"HowTo","category":"policy_guide","category_name":"Policy Guide","title":"Year-End Tax Settlement Correction Claims: 5-Year Deadline and Refund Application Process","summary":"If you paid too much income tax because you missed a deduction or tax reduction in your year-end tax settlement, you can correct it by filing a claim for correction. The starting date of the five-year deadline may differ depending on whether you only completed a year-end tax settlement or also filed a comprehensive income tax return.","author":{"name":"Injoys Editorial Team","url":"https://injoys.com/ko/about"},"key_points":["A claim for correction is a procedure for requesting a tax reduction and refund when the amount already reported or assessed exceeds the correct amount.","The starting date of the five-year deadline may differ between cases involving only a year-end settlement of wage income and those involving a final comprehensive income tax return.","If you filed a comprehensive income tax return for the 2021 tax year, you can generally file a claim for correction until May 31, 2027.","For rent, medical expenses, and donations, you must verify not only the expenditure itself but also the deduction requirements for that year and qualifying documentation.","If you underpaid tax because you omitted income, you may need to file an amended return rather than a claim for correction."],"content_markdown":"If you paid too much income tax because you missed a deduction or tax reduction during your year-end tax settlement, you can request that the tax amount be recalculated by filing a **claim for reassessment**. However, the deadline is not uniformly May 31 of the following year for all employees. The starting date of the five-year period may differ depending on whether your tax liability was finalized through the year-end tax settlement or you separately filed a final global income tax return.\n\n## What Is a Claim for Reassessment?\n\nA claim for reassessment is a system under which a taxpayer may ask the head of the competent tax office to reduce a previously reported or finalized tax base and tax amount when they exceed the correct amounts. Employees who paid too much income tax because they omitted a deduction, tax credit, or tax reduction during their year-end tax settlement may also use this system.\n\nCommon examples include:\n\n- You did not submit the documents required for the monthly rent tax credit to your employer.\n- You later discovered medical expenses omitted from the simplified year-end tax settlement service.\n- You obtained a receipt for a qualifying donation after the fact.\n- You failed to apply for the income tax reduction for employees of small and medium-sized enterprises.\n- You did not claim a dependent deduction even though the requirements were met for that year.\n- You omitted a temporary tax credit applicable to that year, such as a marriage-related tax credit.\n\nA claim for reassessment is not a procedure for applying for a new benefit. It is **a procedure for correcting taxes by proving expenses and requirements that had already been met in the relevant tax year**. Current deduction requirements cannot be applied retroactively to past years.\n\n## How to Calculate the Five-Year Deadline\n\nUnder the Framework Act on National Taxes, the general deadline for filing a claim for reassessment is within five years after the statutory filing deadline. However, for a person whose tax liability was finalized through the year-end settlement of wage and salary income, the payment deadline for the year-end settlement tax and related dates may serve as the reference date.\n\n### If You Only Completed a Year-End Tax Settlement\n\nIf you had only wage and salary income and did not separately file a final global income tax return, the five-year period is generally calculated from the payment deadline for the year-end settlement tax. Under a standard schedule, March 10 of the following year serves as the reference date. However, if the filing of the statement of payment or the payment of tax differs from the usual circumstances, you should confirm the deadline with the tax office.\n\nFor example, if you completed only a year-end tax settlement for wage and salary income attributable to 2021, the general deadline for a claim for reassessment may be regarded as March 10, 2027.\n\n### If You Filed a Final Global Income Tax Return\n\nIf you filed a final global income tax return for the income of the relevant year after completing the year-end tax settlement, the deadline for a claim for reassessment is calculated from the statutory deadline for that return. The statutory filing deadline is generally May 31 of the following year.\n\nTherefore, if you reported income attributable to 2021 through a global income tax return in May 2022, you can generally file a claim for reassessment by May 31, 2027.\n\n| Situation | General reference date | Example for income attributable to 2021 |\n|---|---|---|\n| Only the year-end settlement of wage and salary income was completed | Payment deadline for the year-end settlement tax, etc. | March 10, 2027 |\n| Final global income tax return was filed | Statutory deadline for the final return | May 31, 2027 |\n\nThe actual deadline may differ depending on holiday-related deadline adjustments, filing history, whether a statement of payment was submitted, and other factors. If the deadline is approaching, it is safest to review your filing history for the relevant year on Hometax or ask the competent tax office for the exact deadline.\n\nFor income attributable to 2020, the five-year period expired in 2026 under both the year-end tax settlement standard and the standard global income tax filing deadline. However, if a subsequent event that could not have been anticipated at the time of filing has occurred, such as the finalization of a court judgment, a special rule separate from an ordinary claim for reassessment may apply, so the individual circumstances should be reviewed.\n\n## Should You File in March or May?\n\nMarch 10 of the following year is generally associated with an employer’s schedule for paying taxes related to year-end tax settlements and submitting statements of payment. Employees can view materials for a claim for reassessment on Hometax after the employer submits the statement of payment.\n\nIf the final global income tax filing period in May of the following year has not yet ended, the usual method is to file a wage and salary income return that reflects the omitted deductions. After the statutory filing deadline has passed, use the claim for reassessment procedure.\n\n| Current situation | Procedure generally to be considered |\n|---|---|\n| Around the final filing period in May of the following year | File a global income tax return for wage and salary income |\n| The final filing deadline has passed and too much tax was paid | Claim for reassessment |\n| Income was omitted and too little tax was paid | Consider filing an amended return or a return after the deadline |\n| A subsequent event occurred, such as a tax office decision or court judgment | Review the requirements for a claim for reassessment based on subsequent events |\n\n## Deductions and Supporting Documents to Check Before Applying\n\n### Monthly Rent Tax Credit\n\nTo claim the monthly rent tax credit, you must be able to verify the lease agreement and actual payment history. The following documents are generally required:\n\n- Resident registration certificate\n- Copy of the lease agreement\n- Records showing payment of monthly rent to the landlord, such as bank transfer records or deposit receipts\n\nThe laws and regulations applicable to each tax year govern specific requirements and credit rates, including total salary, home size or standard market value, homeownership status, and change of address. The credit is not granted solely because you paid monthly rent.\n\n### Medical Expense Tax Credit\n\nFor medical expenses not shown in the simplified year-end tax settlement data, you may obtain and submit receipts from the medical institution. However, not all non-covered medical expenses excluded from national health insurance coverage are deductible. Because the law excludes certain items, such as expenses for cosmetic or plastic surgery or health improvement purposes, you must confirm whether the expense was for treatment and qualifies for the credit.\n\n### Donation Tax Credit\n\nA donation receipt issued by a qualifying organization is required. If you made a payment to a religious or nonprofit organization, you must also confirm whether the organization qualifies for a deduction under tax law. A simple bank transfer record may not be sufficient for the donation tax credit.\n\n### Income Tax Reduction for Employees of Small and Medium-Sized Enterprises\n\nThe tax reduction for employees of small and medium-sized enterprises does not automatically apply to all employees of such companies. All requirements must be met, including the employee’s age and work experience, the company’s industry, the employment date, and the reduction period. The reduction is not confirmed merely because the employer is a small or medium-sized enterprise.\n\n### Dependent-Related Deductions\n\nYou must verify the dependent’s income amount, age, and livelihood requirements, as well as whether another family member has claimed a duplicate deduction. If two people claim the same dependent at the same time, additional tax may instead become payable.\n\n## Hometax Claim for Reassessment Procedure\n\nThe Hometax interface and menu names may change, but the general procedure is as follows:\n\n1. Log in to Hometax using identity verification.\n2. Go to the menu related to `Tax Filing \u003e Global Income Tax Return \u003e Wage and Salary Income Return \u003e Claim for Reassessment`.\n3. Select the relevant tax year for the claim for reassessment.\n4. Import the wage and salary income statement of payment submitted by your employer and the existing deduction details.\n5. Enter the omitted income deductions, tax credits, and tax reductions.\n6. Attach supporting documents such as the lease agreement, transfer records, and receipts.\n7. Confirm the account for receiving the refund and your contact information, then submit the claim.\n8. Check the filing and claim history on Hometax for the receipt result and processing status.\n\nAn employee may file a claim directly without going through the employer. However, if the statement of payment cannot be retrieved or the filing structure is complex, you may submit the claim in writing to the competent tax office or have it reviewed by a tax professional.\n\n## Processing After Submission and Local Income Tax\n\nThe tax office reviews the claim and supporting documents to decide whether to reduce the tax amount. Under the Framework Act on National Taxes, the head of the tax office that receives a claim for reassessment must, in principle, make a decision or notify the claimant of the result within two months from the filing date. However, the actual timing of the refund may differ depending on verification of the facts or requests for supplementary materials.\n\nIf income tax is reduced, the associated individual local income tax may also change. Confirm whether the national tax refund result is transmitted to the local government. If necessary, separately check the local income tax refund or reassessment procedure through Wetax or the competent local government.\n\n## Common Mistakes\n\n- **Do not assume that May 31 is the deadline for every employee.** A different reference date may apply to a person who completed only a year-end tax settlement.\n- **Do not apply current deduction requirements to past years.** A claim for reassessment is reviewed under the laws and regulations in effect for each relevant tax year.\n- **Do not treat all non-covered medical expenses as eligible for a credit.** You must verify the treatment purpose and the items excluded by law.\n- **Do not determine eligibility for a tax reduction or donation credit based only on the name of a company or organization.** You must provide evidence that it qualifies under the law.\n- **Do not treat the estimated refund as a confirmed amount.** The actual refund varies depending on the previously determined tax amount, withholding tax, and deduction limits.\n- **Do not use a claim for reassessment to address omitted income.** If you underreported tax, you should consider another procedure, such as filing an amended return.\n\n## Key Takeaways\n\nA claim for reassessment allows you to correct deductions and tax reductions missed during a year-end tax settlement, but the right to file a claim does not remain available indefinitely. If you completed only a year-end tax settlement, calculate the five-year period based on the payment deadline for the year-end settlement tax and related dates. If you also filed a global income tax return, calculate it based on the statutory filing deadline for that return.\n\nBefore applying, first review your filing history and the applicable laws and regulations for each relevant tax year. The correct next step is to prepare lease agreements, receipts, transfer records, and other documents proving that you met the deduction requirements, and then submit them through Hometax.","content_html":"\u003cp\u003eIf you paid too much income tax because you missed a deduction or tax reduction during your year-end tax settlement, you can request that the tax amount be recalculated by filing a \u003cstrong\u003eclaim for reassessment\u003c/strong\u003e. However, the deadline is not uniformly May 31 of the following year for all employees. The starting date of the five-year period may differ depending on whether your tax liability was finalized through the year-end tax settlement or you separately filed a final global income tax return.\u003c/p\u003e\n\u003ch2\u003e\n\u003ca href=\"#what-is-a-claim-for-reassessment\" class=\"anchor\" id=\"what-is-a-claim-for-reassessment\"\u003e\u003c/a\u003eWhat Is a Claim for Reassessment?\u003c/h2\u003e\n\u003cp\u003eA claim for reassessment is a system under which a taxpayer may ask the head of the competent tax office to reduce a previously reported or finalized tax base and tax amount when they exceed the correct amounts. Employees who paid too much income tax because they omitted a deduction, tax credit, or tax reduction during their year-end tax settlement may also use this system.\u003c/p\u003e\n\u003cp\u003eCommon examples include:\u003c/p\u003e\n\u003cul\u003e\n\u003cli\u003eYou did not submit the documents required for the monthly rent tax credit to your employer.\u003c/li\u003e\n\u003cli\u003eYou later discovered medical expenses omitted from the simplified year-end tax settlement service.\u003c/li\u003e\n\u003cli\u003eYou obtained a receipt for a qualifying donation after the fact.\u003c/li\u003e\n\u003cli\u003eYou failed to apply for the income tax reduction for employees of small and medium-sized enterprises.\u003c/li\u003e\n\u003cli\u003eYou did not claim a dependent deduction even though the requirements were met for that year.\u003c/li\u003e\n\u003cli\u003eYou omitted a temporary tax credit applicable to that year, such as a marriage-related tax credit.\u003c/li\u003e\n\u003c/ul\u003e\n\u003cp\u003eA claim for reassessment is not a procedure for applying for a new benefit. It is \u003cstrong\u003ea procedure for correcting taxes by proving expenses and requirements that had already been met in the relevant tax year\u003c/strong\u003e. Current deduction requirements cannot be applied retroactively to past years.\u003c/p\u003e\n\u003ch2\u003e\n\u003ca href=\"#how-to-calculate-the-five-year-deadline\" class=\"anchor\" id=\"how-to-calculate-the-five-year-deadline\"\u003e\u003c/a\u003eHow to Calculate the Five-Year Deadline\u003c/h2\u003e\n\u003cp\u003eUnder the Framework Act on National Taxes, the general deadline for filing a claim for reassessment is within five years after the statutory filing deadline. However, for a person whose tax liability was finalized through the year-end settlement of wage and salary income, the payment deadline for the year-end settlement tax and related dates may serve as the reference date.\u003c/p\u003e\n\u003ch3\u003e\n\u003ca href=\"#if-you-only-completed-a-year-end-tax-settlement\" class=\"anchor\" id=\"if-you-only-completed-a-year-end-tax-settlement\"\u003e\u003c/a\u003eIf You Only Completed a Year-End Tax Settlement\u003c/h3\u003e\n\u003cp\u003eIf you had only wage and salary income and did not separately file a final global income tax return, the five-year period is generally calculated from the payment deadline for the year-end settlement tax. Under a standard schedule, March 10 of the following year serves as the reference date. However, if the filing of the statement of payment or the payment of tax differs from the usual circumstances, you should confirm the deadline with the tax office.\u003c/p\u003e\n\u003cp\u003eFor example, if you completed only a year-end tax settlement for wage and salary income attributable to 2021, the general deadline for a claim for reassessment may be regarded as March 10, 2027.\u003c/p\u003e\n\u003ch3\u003e\n\u003ca href=\"#if-you-filed-a-final-global-income-tax-return\" class=\"anchor\" id=\"if-you-filed-a-final-global-income-tax-return\"\u003e\u003c/a\u003eIf You Filed a Final Global Income Tax Return\u003c/h3\u003e\n\u003cp\u003eIf you filed a final global income tax return for the income of the relevant year after completing the year-end tax settlement, the deadline for a claim for reassessment is calculated from the statutory deadline for that return. The statutory filing deadline is generally May 31 of the following year.\u003c/p\u003e\n\u003cp\u003eTherefore, if you reported income attributable to 2021 through a global income tax return in May 2022, you can generally file a claim for reassessment by May 31, 2027.\u003c/p\u003e\n\u003cdiv class=\"overflow-x-auto\"\u003e\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSituation\u003c/th\u003e\n\u003cth\u003eGeneral reference date\u003c/th\u003e\n\u003cth\u003eExample for income attributable to 2021\u003c/th\u003e\n\u003c/tr\u003e\n\u003c/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Situation\"\u003eOnly the year-end settlement of wage and salary income was completed\u003c/td\u003e\n\u003ctd data-label=\"General reference date\"\u003ePayment deadline for the year-end settlement tax, etc.\u003c/td\u003e\n\u003ctd data-label=\"Example for income attributable to 2021\"\u003eMarch 10, 2027\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Situation\"\u003eFinal global income tax return was filed\u003c/td\u003e\n\u003ctd data-label=\"General reference date\"\u003eStatutory deadline for the final return\u003c/td\u003e\n\u003ctd data-label=\"Example for income attributable to 2021\"\u003eMay 31, 2027\u003c/td\u003e\n\u003c/tr\u003e\n\u003c/tbody\u003e\n\u003c/table\u003e\u003c/div\u003e\n\u003cp\u003eThe actual deadline may differ depending on holiday-related deadline adjustments, filing history, whether a statement of payment was submitted, and other factors. If the deadline is approaching, it is safest to review your filing history for the relevant year on Hometax or ask the competent tax office for the exact deadline.\u003c/p\u003e\n\u003cp\u003eFor income attributable to 2020, the five-year period expired in 2026 under both the year-end tax settlement standard and the standard global income tax filing deadline. However, if a subsequent event that could not have been anticipated at the time of filing has occurred, such as the finalization of a court judgment, a special rule separate from an ordinary claim for reassessment may apply, so the individual circumstances should be reviewed.\u003c/p\u003e\n\u003ch2\u003e\n\u003ca href=\"#should-you-file-in-march-or-may\" class=\"anchor\" id=\"should-you-file-in-march-or-may\"\u003e\u003c/a\u003eShould You File in March or May?\u003c/h2\u003e\n\u003cp\u003eMarch 10 of the following year is generally associated with an employer’s schedule for paying taxes related to year-end tax settlements and submitting statements of payment. Employees can view materials for a claim for reassessment on Hometax after the employer submits the statement of payment.\u003c/p\u003e\n\u003cp\u003eIf the final global income tax filing period in May of the following year has not yet ended, the usual method is to file a wage and salary income return that reflects the omitted deductions. After the statutory filing deadline has passed, use the claim for reassessment procedure.\u003c/p\u003e\n\u003cdiv class=\"overflow-x-auto\"\u003e\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eCurrent situation\u003c/th\u003e\n\u003cth\u003eProcedure generally to be considered\u003c/th\u003e\n\u003c/tr\u003e\n\u003c/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Current situation\"\u003eAround the final filing period in May of the following year\u003c/td\u003e\n\u003ctd data-label=\"Procedure generally to be considered\"\u003eFile a global income tax return for wage and salary income\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Current situation\"\u003eThe final filing deadline has passed and too much tax was paid\u003c/td\u003e\n\u003ctd data-label=\"Procedure generally to be considered\"\u003eClaim for reassessment\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Current situation\"\u003eIncome was omitted and too little tax was paid\u003c/td\u003e\n\u003ctd data-label=\"Procedure generally to be considered\"\u003eConsider filing an amended return or a return after the deadline\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Current situation\"\u003eA subsequent event occurred, such as a tax office decision or court judgment\u003c/td\u003e\n\u003ctd data-label=\"Procedure generally to be considered\"\u003eReview the requirements for a claim for reassessment based on subsequent events\u003c/td\u003e\n\u003c/tr\u003e\n\u003c/tbody\u003e\n\u003c/table\u003e\u003c/div\u003e\n\u003ch2\u003e\n\u003ca href=\"#deductions-and-supporting-documents-to-check-before-applying\" class=\"anchor\" id=\"deductions-and-supporting-documents-to-check-before-applying\"\u003e\u003c/a\u003eDeductions and Supporting Documents to Check Before Applying\u003c/h2\u003e\n\u003ch3\u003e\n\u003ca href=\"#monthly-rent-tax-credit\" class=\"anchor\" id=\"monthly-rent-tax-credit\"\u003e\u003c/a\u003eMonthly Rent Tax Credit\u003c/h3\u003e\n\u003cp\u003eTo claim the monthly rent tax credit, you must be able to verify the lease agreement and actual payment history. The following documents are generally required:\u003c/p\u003e\n\u003cul\u003e\n\u003cli\u003eResident registration certificate\u003c/li\u003e\n\u003cli\u003eCopy of the lease agreement\u003c/li\u003e\n\u003cli\u003eRecords showing payment of monthly rent to the landlord, such as bank transfer records or deposit receipts\u003c/li\u003e\n\u003c/ul\u003e\n\u003cp\u003eThe laws and regulations applicable to each tax year govern specific requirements and credit rates, including total salary, home size or standard market value, homeownership status, and change of address. The credit is not granted solely because you paid monthly rent.\u003c/p\u003e\n\u003ch3\u003e\n\u003ca href=\"#medical-expense-tax-credit\" class=\"anchor\" id=\"medical-expense-tax-credit\"\u003e\u003c/a\u003eMedical Expense Tax Credit\u003c/h3\u003e\n\u003cp\u003eFor medical expenses not shown in the simplified year-end tax settlement data, you may obtain and submit receipts from the medical institution. However, not all non-covered medical expenses excluded from national health insurance coverage are deductible. Because the law excludes certain items, such as expenses for cosmetic or plastic surgery or health improvement purposes, you must confirm whether the expense was for treatment and qualifies for the credit.\u003c/p\u003e\n\u003ch3\u003e\n\u003ca href=\"#donation-tax-credit\" class=\"anchor\" id=\"donation-tax-credit\"\u003e\u003c/a\u003eDonation Tax Credit\u003c/h3\u003e\n\u003cp\u003eA donation receipt issued by a qualifying organization is required. If you made a payment to a religious or nonprofit organization, you must also confirm whether the organization qualifies for a deduction under tax law. A simple bank transfer record may not be sufficient for the donation tax credit.\u003c/p\u003e\n\u003ch3\u003e\n\u003ca href=\"#income-tax-reduction-for-employees-of-small-and-medium-sized-enterprises\" class=\"anchor\" id=\"income-tax-reduction-for-employees-of-small-and-medium-sized-enterprises\"\u003e\u003c/a\u003eIncome Tax Reduction for Employees of Small and Medium-Sized Enterprises\u003c/h3\u003e\n\u003cp\u003eThe tax reduction for employees of small and medium-sized enterprises does not automatically apply to all employees of such companies. All requirements must be met, including the employee’s age and work experience, the company’s industry, the employment date, and the reduction period. The reduction is not confirmed merely because the employer is a small or medium-sized enterprise.\u003c/p\u003e\n\u003ch3\u003e\n\u003ca href=\"#dependent-related-deductions\" class=\"anchor\" id=\"dependent-related-deductions\"\u003e\u003c/a\u003eDependent-Related Deductions\u003c/h3\u003e\n\u003cp\u003eYou must verify the dependent’s income amount, age, and livelihood requirements, as well as whether another family member has claimed a duplicate deduction. If two people claim the same dependent at the same time, additional tax may instead become payable.\u003c/p\u003e\n\u003ch2\u003e\n\u003ca href=\"#hometax-claim-for-reassessment-procedure\" class=\"anchor\" id=\"hometax-claim-for-reassessment-procedure\"\u003e\u003c/a\u003eHometax Claim for Reassessment Procedure\u003c/h2\u003e\n\u003cp\u003eThe Hometax interface and menu names may change, but the general procedure is as follows:\u003c/p\u003e\n\u003col\u003e\n\u003cli\u003eLog in to Hometax using identity verification.\u003c/li\u003e\n\u003cli\u003eGo to the menu related to \u003ccode\u003eTax Filing \u0026gt; Global Income Tax Return \u0026gt; Wage and Salary Income Return \u0026gt; Claim for Reassessment\u003c/code\u003e.\u003c/li\u003e\n\u003cli\u003eSelect the relevant tax year for the claim for reassessment.\u003c/li\u003e\n\u003cli\u003eImport the wage and salary income statement of payment submitted by your employer and the existing deduction details.\u003c/li\u003e\n\u003cli\u003eEnter the omitted income deductions, tax credits, and tax reductions.\u003c/li\u003e\n\u003cli\u003eAttach supporting documents such as the lease agreement, transfer records, and receipts.\u003c/li\u003e\n\u003cli\u003eConfirm the account for receiving the refund and your contact information, then submit the claim.\u003c/li\u003e\n\u003cli\u003eCheck the filing and claim history on Hometax for the receipt result and processing status.\u003c/li\u003e\n\u003c/ol\u003e\n\u003cp\u003eAn employee may file a claim directly without going through the employer. However, if the statement of payment cannot be retrieved or the filing structure is complex, you may submit the claim in writing to the competent tax office or have it reviewed by a tax professional.\u003c/p\u003e\n\u003ch2\u003e\n\u003ca href=\"#processing-after-submission-and-local-income-tax\" class=\"anchor\" id=\"processing-after-submission-and-local-income-tax\"\u003e\u003c/a\u003eProcessing After Submission and Local Income Tax\u003c/h2\u003e\n\u003cp\u003eThe tax office reviews the claim and supporting documents to decide whether to reduce the tax amount. Under the Framework Act on National Taxes, the head of the tax office that receives a claim for reassessment must, in principle, make a decision or notify the claimant of the result within two months from the filing date. However, the actual timing of the refund may differ depending on verification of the facts or requests for supplementary materials.\u003c/p\u003e\n\u003cp\u003eIf income tax is reduced, the associated individual local income tax may also change. Confirm whether the national tax refund result is transmitted to the local government. If necessary, separately check the local income tax refund or reassessment procedure through Wetax or the competent local government.\u003c/p\u003e\n\u003ch2\u003e\n\u003ca href=\"#common-mistakes\" class=\"anchor\" id=\"common-mistakes\"\u003e\u003c/a\u003eCommon Mistakes\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDo not assume that May 31 is the deadline for every employee.\u003c/strong\u003e A different reference date may apply to a person who completed only a year-end tax settlement.\u003c/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDo not apply current deduction requirements to past years.\u003c/strong\u003e A claim for reassessment is reviewed under the laws and regulations in effect for each relevant tax year.\u003c/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDo not treat all non-covered medical expenses as eligible for a credit.\u003c/strong\u003e You must verify the treatment purpose and the items excluded by law.\u003c/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDo not determine eligibility for a tax reduction or donation credit based only on the name of a company or organization.\u003c/strong\u003e You must provide evidence that it qualifies under the law.\u003c/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDo not treat the estimated refund as a confirmed amount.\u003c/strong\u003e The actual refund varies depending on the previously determined tax amount, withholding tax, and deduction limits.\u003c/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDo not use a claim for reassessment to address omitted income.\u003c/strong\u003e If you underreported tax, you should consider another procedure, such as filing an amended return.\u003c/li\u003e\n\u003c/ul\u003e\n\u003ch2\u003e\n\u003ca href=\"#key-takeaways\" class=\"anchor\" id=\"key-takeaways\"\u003e\u003c/a\u003eKey Takeaways\u003c/h2\u003e\n\u003cp\u003eA claim for reassessment allows you to correct deductions and tax reductions missed during a year-end tax settlement, but the right to file a claim does not remain available indefinitely. If you completed only a year-end tax settlement, calculate the five-year period based on the payment deadline for the year-end settlement tax and related dates. If you also filed a global income tax return, calculate it based on the statutory filing deadline for that return.\u003c/p\u003e\n\u003cp\u003eBefore applying, first review your filing history and the applicable laws and regulations for each relevant tax year. The correct next step is to prepare lease agreements, receipts, transfer records, and other documents proving that you met the deduction requirements, and then submit them through Hometax.\u003c/p\u003e\n","tags":["Hometax","Tax reassessment claim","Year-end tax settlement","Income tax refund","Tax credit"],"faqs":[{"question":"When can I file a claim for correction after the year-end tax settlement?","answer":"You can file a claim after the wage and salary income payment statement has been submitted and the payment deadline related to the year-end tax settlement has passed. The standard date is usually after March 10 of the following year, but the date from which the information can be viewed may vary depending on when the data is reflected in Hometax and the company's submission status."},{"question":"Is the deadline for filing a claim for correction of a year-end tax settlement always five years from May 31 of the following year?","answer":"No. For an employee who only completed a year-end tax settlement, the deadline for paying the tax from the year-end tax settlement or another applicable date may serve as the starting point. For someone who filed a final comprehensive income tax return, the period is generally calculated from the statutory filing deadline, which is May 31 of the following year."},{"question":"Until when can I file a claim for correction for the 2021 year-end tax settlement?","answer":"If you only completed a year-end tax settlement, the deadline is generally March 10, 2027. If you filed a final comprehensive income tax return for 2021, the deadline is generally May 31, 2027. You must check your individual filing history and whether any deadlines have changed."},{"question":"If five years have passed, can I no longer receive a refund for a deduction I missed?","answer":"In principle, it is difficult to exercise the general right to file a claim for correction after the five-year deadline has passed. However, if there is a subsequent ground prescribed by law, such as a court judgment becoming final or a separate disposition by the tax authority, you may consider the special provisions for filing a separate claim for correction."},{"question":"Do I need to ask my company to file a claim for correction?","answer":"You do not necessarily need to go through your company. An employee can file a claim directly through Hometax or the competent tax office, and the employee must prepare documentation proving that the requirements for the omitted deduction are met."},{"question":"Are all non-covered medical expenses eligible for a tax credit?","answer":"No. Expenses are not automatically deductible simply because they are not covered by insurance; you must determine whether they are eligible medical expenses incurred for treatment. Items excluded by law, such as cosmetic or plastic surgery and expenses for health improvement, are not eligible for a tax credit."},{"question":"If I paid my monthly rent by bank transfer, can I claim the tax credit without a lease agreement?","answer":"Bank transfer records alone make it difficult to verify both the lease relationship and whether the tax credit requirements are met. Generally, you must prepare the lease agreement, a copy of your resident registration, and proof of monthly rent payments."},{"question":"If I file a claim for correction, will the entire amount I claim be refunded?","answer":"No. The tax office determines whether a refund is due and the amount after reviewing the deduction requirements, supporting documents, deduction limits, and the existing determined tax amount. If there is no determined tax amount paid or the deduction limit is exceeded, the refund may be smaller than expected or there may be no refund."},{"question":"If I discover that I omitted income, should I file a claim for correction?","answer":"A claim for correction is a procedure for reducing tax when you have overpaid. If you underpaid tax due to omitted income or another reason, you should generally consider filing an amended return or a late return."},{"question":"If my income tax is refunded, will my local income tax also be refunded automatically?","answer":"The results of a national tax correction may be transmitted to the local government, but the processing method and timing may differ. It is advisable to separately check the status of your individual local income tax refund or correction through Wetax or the competent local government."}],"sources":[{"url":"https://www.law.go.kr/법령/국세기본법/제45조의2","title":"Article 45-2 of the Framework Act on National Taxes: Claim for Rectification, etc.","type":"source"},{"url":"https://www.law.go.kr/법령/소득세법","title":"Income Tax Act","type":"source"},{"url":"https://www.hometax.go.kr/","title":"National Tax Service Hometax","type":"source"},{"url":"https://www.wetax.go.kr/","title":"WETAX","type":"source"}],"images":[{"id":536,"url":"https://injoys.com/rails/active_storage/blobs/proxy/eyJfcmFpbHMiOnsiZGF0YSI6NjM5NywicHVyIjoiYmxvYl9pZCJ9fQ==--38a9b517871a19a0e892f8cae2ad2a4f0526b8ae/ai-2f766733.webp","is_representative":true,"generation_method":"ai_image","license":"ai_generated","mime_type":"image/webp","translations":{"ko":{"alt":"계절 달력과 시계, 세금 서류, 공제 항목, 환급금을 나타낸 경정청구 절차 일러스트","caption":"연말정산 경정청구의 기한 확인부터 서류 제출과 환급까지의 과정을 보여준다.","description":null},"en":{"alt":"Tax amendment process with a seasonal calendar, clocks, documents, deductions, and refund coins","caption":"The illustration shows the steps from checking the filing deadline to submitting documents and receiving a refund.","description":null},"ja":{"alt":"季節のカレンダー、時計、税務書類、控除項目、還付金で示す更正請求の流れ","caption":"年末調整の更正請求で、期限確認から書類提出、還付までの流れを示している。","description":null},"es":{"alt":"Proceso de rectificación fiscal con calendario, relojes, documentos, deducciones y monedas de reembolso","caption":"La ilustración muestra desde la revisión del plazo hasta la entrega de documentos y el reembolso.","description":null},"id":{"alt":"Proses koreksi pajak dengan kalender, jam, dokumen, pos pengurang, dan koin pengembalian dana","caption":"Ilustrasi ini menunjukkan tahap pemeriksaan tenggat, pengajuan dokumen, hingga penerimaan pengembalian pajak.","description":null},"pt":{"alt":"Processo de retificação fiscal com calendário, relógios, documentos, deduções e moedas de reembolso","caption":"A ilustração mostra da verificação do prazo ao envio dos documentos e recebimento da restituição.","description":null},"zh-hant":{"alt":"以四季月曆、時鐘、稅務文件、扣除項目與退稅硬幣呈現更正申請流程","caption":"插圖呈現年末稅務更正申請從確認期限、提交文件到取得退稅的流程。","description":null},"de":{"alt":"Steuerkorrektur mit Jahreszeitenkalender, Uhren, Unterlagen, Abzügen und Erstattungsmünzen","caption":"Die Illustration zeigt den Ablauf von der Fristprüfung über die Einreichung bis zur Steuererstattung.","description":null}}},{"id":537,"url":"https://injoys.com/rails/active_storage/blobs/proxy/eyJfcmFpbHMiOnsiZGF0YSI6NjQwMywicHVyIjoiYmxvYl9pZCJ9fQ==--359cad46535ace358b6f658311b215b5efa15214/ai-3a40890e.webp","is_representative":false,"generation_method":"ai_image","license":"ai_generated","mime_type":"image/webp","translations":{"ko":{"alt":"달력, 시계, 세금 서류, 돋보기, 계산기, 동전과 서류함이 배치된 연말정산 일러스트","caption":"연말정산 서류를 검토하고 경정청구로 환급을 신청하는 과정을 나타낸다.","description":null},"en":{"alt":"Tax forms with a magnifier, calendar, clock, calculator, coins, bank, and document folder","caption":"The illustration represents reviewing year-end tax documents and filing a refund claim.","description":null},"ja":{"alt":"カレンダー、時計、税務書類、虫眼鏡、電卓、硬貨、書類フォルダーのイラスト","caption":"年末調整の書類を確認し、更正の請求で還付を申請する流れを表している。","description":null},"es":{"alt":"Formularios fiscales con lupa, calendario, reloj, calculadora, monedas, banco y carpeta","caption":"La ilustración representa la revisión de documentos fiscales y la solicitud de un reembolso.","description":null},"id":{"alt":"Formulir pajak, kaca pembesar, kalender, jam, kalkulator, koin, bank, dan folder dokumen","caption":"Ilustrasi ini menggambarkan pemeriksaan dokumen pajak dan pengajuan permohonan pengembalian dana.","description":null},"pt":{"alt":"Formulários fiscais com lupa, calendário, relógio, calculadora, moedas, banco e pasta","caption":"A ilustração representa a revisão de documentos fiscais e o pedido de restituição.","description":null},"zh-hant":{"alt":"日曆、時鐘、稅務文件、放大鏡、計算機、硬幣、銀行與文件夾插圖","caption":"插圖呈現檢查年終結算文件並申請更正退稅的流程。","description":null},"de":{"alt":"Steuerformulare mit Lupe, Kalender, Uhr, Rechner, Münzen, Bank und Dokumentenmappe","caption":"Die Illustration zeigt die Prüfung von Steuerunterlagen und die Beantragung einer Erstattung.","description":null}}}],"published_at":"2026-08-08T12:44:49+09:00","updated_at":"2026-08-08T12:44:49+09:00","license":"cc_by","translation_status":"reviewed","available_locales":["ko","en","ja","es"],"data_locales":["ko","en","ja","es","id","pt","zh-hant","de"],"url":"https://injoys.com/en/articles/year-end-tax-adjustment-correction-claim-five-year-deadline"}