The boxes to check are the year-end settlement documents for earned income listed by the National Tax Service (NTS): what to collect, where to get it, and whether the simplified service provides it. Refund amounts and product sign-ups stay closed.
This post covers Korean income tax rules for employees in Korea; the linked National Tax Service, statute and government sources are in Korean, and document and form names are translated.
1. What is year-end tax settlement?
This is the original text of the National Tax Service's "Year-End Tax Settlement Guide for Employees" (2024 tax year).
"As a procedure for settling the earned income tax an employee paid this year, when the withholding agent (the company) pays the salary for February of the following year, if the tax already withheld at each monthly salary payment is more than the annual earned income tax accurately calculated under the tax laws, the excess tax is returned, and if it is less, the difference is paid additionally." (S3)
Income Tax Act Article 137(1): "When paying the earned income for February of the year following the relevant taxable period, or the earned income for the month in which a retiring person retires, the withholding agent shall withhold the income tax calculated in the order of the following subparagraphs (hereinafter referred to as the 'additional tax payable' in this Article)." (S8)
Income Tax Act Article 140(1): to receive the comprehensive income deductions and tax credits, the employee submits the "Earned Income Earner's Income and Tax Credit Deduction Return" to the withholding agent before receiving the earned income for February of the following year (for a person who has retired, before receiving the earned income for the month containing the retirement date). (S8)
2. Timing: the tax year and "now"
"To collect now" means the receipts, contracts and transfer records arising in the 2026 taxable period.
| Tax year | Year the spending occurs | When the simplified service and company submission open | As of 2026-08-18 |
|---|---|---|---|
| 2025 tax year | 2025.1.1.–12.31. | NTS press release: simplified service opens 2026.1.15., final confirmation 2026.1.20. (S1) | A settlement already past |
| 2026 tax year | 2026.1.1.–12.31. (= the receipts to collect now) | Settlement usually takes place through the simplified service in January of the following year and at payment of the February salary. The January 2027 opening date has not been announced | What you are collecting now |
Only the dates stamped in the sources are attached to the simplified-service schedule the NTS announces each year. This post does not assert that the 2026 tax year service will open on January 15.
"Year-end settlement preview": the NTS posted the opening of the 2025 tax year preview on the government policy briefing site on 2025.11.5. (S10) As of 2026-08-18 there is no primary announcement of the 2026 tax year preview schedule.
The skeleton for company submission uses both the "2024 Tax Year Year-End Tax Settlement Guide for Employees" (S3) and Annexed Form No. 37 (amended 2026.3.20., S2). Where they differ, the form (S2) and the Enforcement Rule (S4) take priority.
3. The skeleton of documents submitted to the company
The S3 table "02 Documents to submit to the company at year-end settlement" + the heading of S2 Annexed Form No. 37(1).
| Document to submit (original name) | Who submits it (S3 original) | Notes |
|---|---|---|
| Certified copy of resident registration (family relationship certificate if the family relationship cannot be confirmed) | Employees claiming the dependent deduction | Issued free on Government24 (S2). Documents marked * may be omitted in the following year if nothing has changed (S2, S4) |
| Supporting documents for income deductions and tax credits (simplified-service data and collected receipts) | All employees doing year-end settlement | Simplified-service PDF or receipts from the issuing institution (S3) |
| Income and tax credit deduction return | All employees doing year-end settlement | Statutory name: Earned Income Earner's Income and Tax Credit Deduction Return (S8) |
| Statement of income deductions and tax credits for pensions, savings, etc. | Employees claiming the retirement pension or pension savings tax credit, or the housing subscription savings or long-term collective investment securities savings income deduction | Document row only |
| Statement of income deductions and tax credits for monthly rent and for principal and interest repayments on housing lease loans between residents | Employees claiming the deduction for monthly rent and for principal and interest repayments on housing lease loans between residents | |
| Medical expense payment statement | Employees claiming the medical expense tax credit | |
| Disability certificate, etc. | Employees themselves and dependents who are seriously ill patients requiring constant treatment | For seriously ill patients requiring constant treatment the simplified service does not provide it; get a disability certificate from the medical institution (S5) |
| Donation statement (donation receipts) | Employees claiming the donation tax credit | |
| Credit card etc. income deduction application | Employees claiming the credit card etc. income deduction | Form name: Application for Income Deduction for Credit Card etc. Spending (S2) |
| Earned income withholding receipt / earned income withholding ledger by income earner | Employees who left mid-year or who work for two or more companies | Previous (or concurrent) workplace |
S3 note: if the income and tax credit deduction return and the relevant supporting documents are not submitted, only the personal deductions for the employee (basic deduction, additional deduction) and the standard tax credit (130,000 won) apply. (S3)
Collection routes (S3 original):
- Hometax (www.hometax.go.kr) → Incentives · Year-end settlement · Donations → Year-end Settlement Simplified Service
- Data not submitted through the simplified service: collect directly from the institution that issues the receipt
- Hometax "Convenient Year-End Settlement": view, print and submit online the income and tax credit deduction return and its attached documents. Data that is not provided can be entered directly
Building register transcript: issued by the Supreme Court of Korea Internet Registry Office (www.iros.go.kr). (S3)
4. The 45 types the simplified service provides: NTS 2026.1.14. Reference 1
Original title: "Data provided by the year-end settlement simplified service". 45 types in total (the existing 42 types + 3) for the 2025 tax year, service opening in 2026.1. (S1)
Original footnotes: "△: data that is not mandatory to submit but is submitted voluntarily, so it may not appear in a lookup." "(Opened in '06) 8 types → ('19) 25 types → ('23) 37 types → ('25) 42 types → ('26) 45 types".
| Main category | Data provided (S1 original) | Provided |
|---|---|---|
| Personal deductions | Disability evidence: persons with disabilities under the Act on Welfare of Persons with Disabilities, persons of national merit, and proof of use of developmental rehabilitation services (new) | ○ |
| National Pension contributions | Amount of National Pension contributions paid | ○ |
| Insurance premiums | Amount of National Health Insurance premiums paid / amount of employment insurance premiums paid | ○ |
| Housing funds | Principal and interest repaid on housing lease loans / interest repaid on long-term mortgage loans | ○ |
| Personal pension savings | Amount paid into personal pension savings | ○ |
| Housing subscription savings | Amount paid into housing subscription savings | ○ |
| Small business owner mutual-aid installments | Amount paid into small enterprise and small business owner mutual-aid installments | ○ |
| Venture investment association contributions | Amount paid into venture company investment trusts | ○ |
| Credit card etc. spending | Credit card, debit card and registered prepaid card spending (sports facility fees (new)) / cash receipt spending, sports facility fees | ○ |
| Long-term collective investment securities savings | Amount paid into long-term collective investment securities savings | ○ |
| Pension accounts | Amount paid into pension savings accounts / amount paid into retirement pension accounts | ○ |
| Protection-type insurance premiums | Protection-type insurance premiums paid (*including housing lease deposit return guarantee insurance premiums) / disability-only protection-type insurance premiums paid | ○ |
| Medical expenses | Medical expenses paid to medical institutions (*infertility treatment costs, premature infant etc. medical expenses not distinguished) | ○ |
| Medical expenses | Cost of medicines (including herbal medicine) purchased at pharmacies | ○ |
| Medical expenses | Out-of-pocket amounts actually paid under the Act on Long-Term Care Insurance for Senior Citizens | ○ |
| Medical expenses | Cost of vision-correcting glasses and contact lenses | △ |
| Medical expenses | Cost of hearing aids and medical devices | △ |
| Medical expenses | Cost of assistive devices for older persons and persons with disabilities, disability activity support benefits (new) | ○ |
| Medical expenses | Postpartum care center costs | ○ |
| Education expenses | Education expenses paid to elementary, middle and high schools and universities (graduate schools) (*including school meals, textbooks and after-school class fees in addition to public charges such as admission fees) | ○ |
| Education expenses | College Scholastic Ability Test fees, university admission screening fees paid | ○ |
| Education expenses | Vocational skills development training fees paid | ○ |
| Education expenses | Principal and interest repaid on student loans | ○ |
| Education expenses | Kindergarten and daycare center education expenses paid | ○ |
| Education expenses | Academic credit bank (self-study degree) education expenses paid | △ |
| Education expenses | Private academy and sports facility education expenses for preschool children, school uniform costs | △ |
| Education expenses | Special education expenses for persons with disabilities paid | △ |
| Donations | Amounts on electronic donation receipts (*including hometown love donations) | ○ |
| Donations | Donations other than those on electronic donation receipts | △ |
| Monthly rent | Monthly rent paid to public rental housing operators | ○ |
| Monthly rent | Monthly rent paid by credit card | △ |
The 3 new types in 2026.1 (S1 original):
- Proof of use of developmental rehabilitation services: evidence needed to include a child under 9 receiving developmental rehabilitation services support in the additional deduction for persons with disabilities
- Out-of-pocket data for disability activity support benefits: evidence needed to claim the medical expense tax credit for out-of-pocket payments for services such as home bathing provided under the Act on Activity Assistance Services for Persons with Disabilities
- Sports facility fee data: evidence needed to claim, as the culture and sports portion of credit card etc. spending (30% deduction rate), the income deduction for fees for swimming pools, fitness centers and the like on or after 2025.7.1.
The nature of the simplified service (S1 and S5 original):
- Because it is "data submitted in bulk by the issuing institutions", "whether the deduction requirements are met must be checked by the employees themselves"
- "It shows as-is the data that receipt-issuing institutions such as schools, hospitals and clinics, and card companies submitted to the National Tax Service"
- From 2026.1 you can view the data only after agreeing to the "Items to confirm before viewing year-end settlement simplified data" (S1)
For health insurance, employment insurance and the National Pension, only the ○ rows above and "may not be submitted to the simplified service if managed by the company" (S5 Q8) are noted.
5. Documents the simplified service does not provide or marks △
S1 body footnote: "Some data such as preschool children's academy fees, monthly rent and donation receipts is not provided." "Data that is not provided or is missing should be obtained directly from the issuing institution and submitted to your company." (S1)
S5 Q6 examples: "hearing aid purchase costs, costs of purchasing or renting assistive devices for persons with disabilities, education expenses paid to foreign educational institutions, preschool children's academy fees, donations, etc." (S5)
S5 original text on exclusions from the medical expense reporting center: "The costs of purchasing vision-correcting glasses or contact lenses, hearing aids, assistive devices for persons with disabilities, medical devices, etc. and postpartum care center costs are not costs for which year-end settlement simplified data must be submitted by law, so they are not subject to reporting as medical expenses that do not appear in a lookup; please obtain a receipt from the relevant institution."
| Document or item (original name) | Where | The "reason it may be missing" written by the NTS | Source |
|---|---|---|---|
| Receipt for vision-correcting (vision-corrective) glasses and contact lenses, on which an optician has confirmed the user's name and that the item is for vision correction | Place of purchase (optician's shop) | S1 table △ (voluntary submission). S5: not subject to mandatory submission. If it does not appear, submit a receipt confirmed by an optician to the company | [S1] [S4] [S5] |
| Receipt for hearing aids and medical devices, on which the seller has confirmed the user's name | Seller | S1 table △. S5: not subject to mandatory submission | [S1] [S4] [S5] |
| Receipt for purchase or rental of assistive devices for persons with disabilities | Seller | Stated in the S5 Q6 examples | [S4] [S5] |
| Medical device purchase or rental: receipt from the seller (lessor) + prescription from a doctor etc. | Seller and medical institution | S5: not subject to mandatory submission | [S4] [S5] |
| Postpartum care center receipt, on which the center has confirmed the user's name | Postpartum care center | S5: not subject to mandatory submission. "It appears only if the postpartum care center has submitted data to the National Tax Service." The S1 table shows ○ (when submitted) | [S1] [S4] [S5] |
| Documents distinguishing infertility treatment, premature infants etc.: a medical certificate or certificate under Article 17 of the Medical Service Act and the documents under items (a) and (d) | Medical institution | S1: "infertility treatment costs, premature infant etc. medical expenses not distinguished". S5: because it is provided without separate distinction, the employee obtains the documents and submits them separately | [S1] [S4] [S5] |
| Receipts for medical expenses that do not appear in a lookup | The medical institution concerned | Not submitted or omitted by the issuing institution. Neighborhood clinics, in-home facilities among long-term care institutions and the like may fail to submit or submit late even after being reported (S5) | [S1] [S5] |
| Receipts for newborn medical expenses | The medical institution concerned | Data cannot be submitted before the birth is registered or if the resident registration number is not given to the hospital (S5) | [S5] |
| Certificate of payment of academy and sports facility education expenses for preschool children | Academy or sports facility | S1 table △. S1 footnote: "preschool children's academy fees" not provided. S5: appears only if the institution submitted the data | [S1] [S5] |
| School uniform purchase receipt | School uniform store (or the simplified service for joint purchases organized by the school) | S1 table △. S5: provided only for joint purchases organized by the school and credit card etc. (including cash receipt) purchases at school uniform specialty stores. Otherwise issued directly by the store | [S1] [S5] |
| Receipt for education expenses abroad + documents proving self-funded study-abroad eligibility such as a certificate of study abroad | The foreign educational institution concerned / documents proving study-abroad eligibility | S5: "Education expenses abroad and academic credit bank (self-study degree) education expenses are not provided by the simplified service." Academic credit bank (self-study degree) is △ in the S1 table | [S4] [S5] |
| Certificate of payment of academic credit bank (self-study degree) education expenses | The educational institution concerned (if dissolved, the National Institute for Lifelong Education) | S1 table △ | [S1] [S4] |
| Certificate of payment of special education expenses for persons with disabilities + documents proving the facility or corporation | The facility or corporation concerned | S1 table △ | [S1] [S4] |
| Additional daycare fees at a daycare center: certificate of payment of education expenses | The childcare facility concerned | S5: for additional childcare fees beyond the parental share paid with the i-Happiness (i-Love) card, the facility issues a certificate of payment of education expenses | [S5] |
| Donation receipts (other than electronic donations) | Donation organizations (religious organizations, welfare facilities, etc.) | S1 table △ and "some data such as donation receipts not provided". S5: "Only details voluntarily submitted by donation organizations are provided" | [S1] [S5] |
| Monthly rent: copy of the lease contract (deed), proof of payment such as cash receipts, bank transfer receipts or deposit slips, certified copy of resident registration | Lease contract, bank transfers, Government24 | S1: "monthly rent" not provided. Table: payments to public rental housing operators ○, monthly rent paid by credit card △ | [S1] [S2] [S4] |
| Disability certificate for seriously ill patients requiring constant treatment | Medical institution | S5: "Because it is not provided as simplified data, a disability certificate must be obtained from the medical institution" | [S3] [S5] |
| Credit card etc. spending confirmation (when the looked-up amount differs from the actual amount) | Card company | S5: if it differs from the actual amount, get it reissued by the card company and submit it to the company | [S5] |
S5's phrase "neighborhood clinics, in-home facilities among long-term care institutions and the like are small in scale" is used only for that sentence. It is not extended to glasses or school uniforms.
6. Documents by deduction item: Enforcement Rule Article 58 and Annexed Form No. 37
For limits, only the boxes the NTS and the form wrote next to the documents are carried over.
6-1. Personal and additional deductions (S2)
| Category | Attached documents (original) | Issued by |
|---|---|---|
| Basic deduction | Certified copy of resident registration*, family relationship certificate* (if the dependent does not live with you), adoption relationship certificate*, certificate of benefit recipient*, foster care confirmation, etc. | Government24 (certified copy of resident registration free, S2). Family relationship and adoption: city or district office, or Government24 |
| Additional deduction | Disability certificate*, copy of disability registration card (booklet, welfare card)*, other documents that can prove disability (social security benefit decision notice, etc.) | Medical institution / institutions issuing the registration card such as community service centers and Bokjiro. Certificates for seriously ill patients come from the medical institution (S5) |
- Personal documents (family relationship certificate, adoption relationship certificate, certificate of benefit recipient, disability certificate, etc.) are not submitted in the following year if nothing has changed (S2 notes). The omissions under Article 58(3) of the Enforcement Rule are proof of study abroad, the certified copy of resident registration, housing value and registration documents for housing funds, and documents for constructed housing (S4).
6-2. Medical expenses (S2, S4 Article 58(1)2)
Document to prepare: medical expense payment statement + whichever of the receipts below applies.
| Spending | Document (original) | Issued by |
|---|---|---|
| Medical institutions and pharmacies | Invoice or receipt under Article 7(1) of the Rules on the Standards for National Health Insurance Care Benefits, confirmation of payment of medical (drug) costs under paragraph 2 of the same Article, or the medical expense burden statement issued by the president of the National Health Insurance Service | Hospitals, clinics and pharmacies / National Health Insurance Service |
| Glasses and contact lenses | A receipt on which an optician has confirmed the user's name and that the item is for vision correction | Optician's shop |
| Hearing aids and assistive devices for persons with disabilities | A receipt on which the seller has confirmed the user's name | Seller |
| Medical device purchase or rental | A prescription from a doctor, dentist or Korean medicine doctor + a medical expense receipt showing the device name, issued by the seller or lessor | Medical institution + seller or lessor |
| Postpartum care center | A receipt on which the postpartum care center has confirmed the user's name | Postpartum care center |
| Premature infants and infants with congenital anomalies | A medical certificate or certificate under Article 17 of the Medical Service Act + the applicable receipt above | Medical institution |
| Infertility treatment | A medical certificate or certificate under Article 17 of the Medical Service Act and whichever of the documents under item (a) (medical institutions and pharmacies) and item (d) (medical devices) applies | Medical institution |
Limit written next to the S2 form instructions: vision-correcting glasses or contact lens costs are limited to 500,000 won per person per year.
S5: indemnity (actual-loss) medical insurance payouts received appear under the medical expense item in the simplified service and are deducted from medical expenses.
6-3. Education expenses (S2, S4 Article 58(1)3 to 3-5)
| Document (original) | Issued by | Notes |
|---|---|---|
| Certificate of payment of education expenses | Kindergartens, daycare centers, elementary/middle/high schools, universities (graduate schools), academies, sports facilities, vocational skills development training facilities | Basic document |
| Certificate of purchase of books for after-school classes | The place of purchase (when bought outside the school) | Books for elementary, middle and high school after-school classes |
| Documents proving the institution is a social welfare facility, a rehabilitation education facility for persons with disabilities or a similar foreign facility | The issuer of the relevant payment certificate | Special education expenses |
| Documents proving self-funded study-abroad eligibility under the Regulations on Study Abroad, such as a certificate of study abroad* | The institution concerned | * May be omitted in following years if nothing changes (S4) |
| Certificate of payment of education expenses for an academic credit course | The school or educational institution concerned. If dissolved, the National Institute for Lifelong Education | S4 subparagraph 3-2 |
| Certificate of payment of education expenses for a self-study degree course | The educational institution concerned | S4 subparagraph 3-3 |
Limits S5 wrote next to the education expense documents: 3 million won per year for preschool children and elementary/middle/high school students, 9 million won per year for university students, no limit for the employee's own and disability special education expenses. School uniforms 500,000 won per middle or high school student per year, field trip costs 300,000 won per student, with the limit applied together with general education expenses. (S5)
6-4. Donations (S2, S4 Article 58(1)5)
| Document | Issued by |
|---|---|
| Donation statement | Prepared by the employee, submitted to the company |
| Donation receipt, on which the issuing institution has written and confirmed the donation details such as the donor's name, donation amount and donation date | Donation organization. For political funds, the receipt under the relevant law such as the Political Funds Act. If the withholding agent collects donations in bulk, the receipt need not be attached (S4) |
6-5. Insurance premiums (S2, S4 Article 58(1)1)
| Document | Issued by |
|---|---|
| Certificate of insurance premium payment or insurance premium payment receipt, marked as eligible for deduction or as disability-only insurance | Insurance company. Simplified service ○ (S1) |
6-6. Housing funds and monthly rent (S2, S4 Article 58(1)4, S6)
| Category | Document (original) | Issued by |
|---|---|---|
| Housing lease loans, long-term mortgages, etc. (excluding the monthly rent deduction) | Certificate of housing fund repayment etc. or certificate of interest repayment on long-term mortgage loans | Financial company. Simplified service ○, but if it does not appear, the financial company (S6) |
| Common | Certified copy of resident registration | Government24 |
| Housing acquired with a long-term mortgage | Confirmation of individual housing price or confirmation of apartment housing price or document announced by the Commissioner of the National Tax Service + certificate of registered matters or sale contract | Real estate price disclosure / Internet Registry Office (www.iros.go.kr, S3) |
| Lease loans between residents | Copy of the lease contract, copy of the loan-for-consumption contract, proof of repayment to the lender such as bank transfer receipts and deposit slips | Contracting parties and financial institutions |
| Monthly rent | Copy of the lease contract (deed) + documents that can prove monthly rent was paid to the housing landlord, such as cash receipts, bank transfer receipts or deposit slips + certified copy of resident registration | Contract, transfers, Government24 |
| Statement | Statement of income deductions and tax credits for monthly rent and for principal and interest repayments on housing lease loans between residents | Prepared by the employee (S2, S3) |
The one line in S2 on attachments for the monthly rent tax credit: "Copy of the lease contract, documents proving payment of monthly rent such as deposit slips, certified copy of resident registration."
The monthly rent figures S5 wrote next to the documents: total salary of 80 million won (comprehensive income of 70 million won) or less, national housing size or a standard market price of 400 million won or less, up to 10,000,000 won per year, a credit rate of 15% or 17% (17% for total salary of 55,000,000 won or less). (S5)
6-7. Others: document names only
| Category | Attached documents (S2 original) |
|---|---|
| Personal pension savings deduction | Certificate of personal pension savings payment or copy of the personal pension savings passbook |
| Housing subscription savings deduction | Certificate of housing subscription savings payment, certified copy of resident registration |
| Small enterprise and small business owner mutual-aid installments | Certificate of mutual-aid installment payment |
| Investment association contributions | Application for income deduction for contributions etc., confirmation of contribution or investment |
| Credit card etc. spending | Application for income deduction for credit card etc. spending, credit card etc. spending confirmation, evidence of public transportation use (tickets, etc.) |
| Youth long-term collective investment securities savings | Certificate of youth long-term collective investment securities savings payment |
| Marriage tax credit | Marriage relationship certificate (S2: limited to marriages registered 2024.1.1.–2026.12.31., per the form instructions) |
| Pension account tax credit | Pension payment confirmation (for tax credit) + statement of income deductions and tax credits for pensions, savings, etc. |
7. Issuers
| Issuer | Documents pinned down in this post |
|---|---|
| Hometax hometax.go.kr | Year-end settlement simplified income and tax credit deduction details (PDF), Convenient Year-End Settlement return and attached documents, reporting center for medical expenses that do not appear in a lookup |
| Government24 www.gov.kr | Certified copy of resident registration (S2: free) |
| Internet Registry Office www.iros.go.kr | Building certificate of registered matters (S3) |
| Hospitals, clinics and pharmacies | Invoices and receipts, confirmations of payment of medical and drug costs, medical certificates and prescriptions, disability certificates for seriously ill patients |
| National Health Insurance Service | Medical expense burden statement |
| Optician's shop | Vision-correction receipt confirmed by an optician |
| Postpartum care center | Receipt confirmed by the postpartum care center |
| Schools, kindergartens, daycare centers, academies, sports facilities | Certificate of payment of education expenses, (where applicable) school uniform payment confirmation |
| School uniform store | School uniform purchase receipt |
| Donation organizations | Donation receipts |
| Financial companies, card companies, insurers | Certificate of housing fund repayment etc., certificate of interest repayment on long-term mortgage loans, credit card etc. spending confirmation, certificate of insurance premium payment, pension payment confirmation |
| Community service centers, Government24, etc. | Family relationship certificate, marriage relationship certificate, copy of disability registration card |
| Previous (or concurrent) workplace | Earned income withholding receipt, earned income withholding ledger by income earner |
8. Schedule: confirmed dates by year and what is unannounced
Only the source dates below are attached to the simplified-service schedule the NTS announces each year.
| Schedule | 2024 tax year (settled 2025.1) | 2025 tax year (settled 2026.1) | 2026 tax year (settled 2027.1) |
|---|---|---|---|
| Simplified service opens | From 2025.1.15. (S3, S5) | 2026.1.15. (Thu) (S1) | Not announced |
| Data submission (issuing institutions) | 2025.1.13. 22:00; corrections and additions 1.15.–1.18., 18:00–22:00 (S5) | S1 only lists the opening and confirmation for employees | Not announced |
| Reporting center for medical expenses that do not appear | 2025.1.15.–1.17. (S5) | Until 2026.1.17. (Sat) (S1) | Not announced |
| Final confirmed data | From 2025.1.20. (S5) | From 2026.1.20. (Tue) (S1) | Not announced |
| Submission to the company | Before receiving the earned income for February of the following year (S8) | Same | Same |
| Preview | (Announced in that year) | Opened 2025.11.5. (S10, 2025 tax year) | Not announced |
S5: the simplified service is available daily from 06:00 to 24:00. During the peak period of 1.15.–1.25., users are automatically logged out after 30 minutes of use (a sentence from the 2024 tax year Q&A).
The bulk provision service has procedures in S3 and S5. It is noted only as a submission route.
9. Retention
The NTS guide booklet for employees (S3) has no standalone item saying "keep receipts for ○ years".
Framework Act on National Taxes Article 85-3(2): books and supporting documents are kept for 5 years from the day after the statutory filing deadline for the national tax for the taxable period to which the transaction belongs (7 years for offshore transactions). (S7)
Paragraph 4 of the same Article: if they are converted into digitized documents under the Framework Act on Electronic Documents and Transactions and kept at a certified electronic document center, they are deemed to have been kept. However, documents prescribed by Presidential Decree as easy to forge or alter, such as contracts, are excluded. (S7)
S3: if an income deduction or tax credit was omitted, a request for correction can be filed within 5 years after the tax payment deadline. This is not turned into a retention-obligation sentence.
10. What this post does not cover
Tax-saving simulations, comparisons of ISA, pension savings and IRP products, eligibility for the four major social insurances, indemnity insurance claims, DSR, and advertising for tax accountants or apps.
Sources
- [S1] National Tax Service press reference material "The year-end settlement simplified service opens on January 15 (Thu)", 2026.1.14. 2025 tax year. https://www.korea.kr/briefing/pressReleaseView.do?newsId=156739633
- [S2] Enforcement Rule of the Income Tax Act, Annexed Form No. 37(1) (amended 2026.3.20.). https://www.law.go.kr/LSW/flDownload.do?bylClsCd=110202&flSeq=164441405
- [S3] National Tax Service "2024 Tax Year Year-End Tax Settlement Guide for Employees". https://hometax.speedycdn.net/dn_dir/webdown/ys/e%20%EC%97%B0%EB%A7%90%EC%A0%95%EC%82%B0%EC%9A%94%EC%95%BD.pdf
- [S4] Enforcement Rule of the Income Tax Act Article 58 (effective 2026.5.22.). https://www.law.go.kr/LSW/lsLawLinkInfo.do?chrClsCd=010202&lsId=007507&lsJoLnkSeq=1000316614&print=print
- [S5] National Tax Service "Year-End Settlement Simplified Service and Bulk Provision Service Q&A" (schedules in the text are for the 2024 tax year). https://hometax.speedycdn.net/dn_dir/webdown/ys/c%20%EC%9E%90%EC%A3%BC%20%EB%AC%BB%EB%8A%94%20%EC%A7%88%EB%AC%B8%EA%B3%BC%20%EB%8B%B5%EB%B3%80.pdf
- [S6] National Tax Service tailored guide "Income deduction for principal and interest repayments on housing lease loans". https://www.nts.go.kr/nts/cm/cntnts/cntntsView.do?cntntsId=239021&mi=40609
- [S7] Framework Act on National Taxes Article 85-3. https://www.law.go.kr/lsLawLinkInfo.do?chrClsCd=010202&lsJoLnkSeq=1000575394
- [S8] Income Tax Act Articles 137 and 140. https://www.law.go.kr/LSW/lsLawLinkInfo.do?chrClsCd=010202&lsId=001565&lsJoLnkSeq=1000821267&print=print
- [S9] Policy briefing "Year-end settlement simplified service opens on the 15th… 45 items in total", 2026.1.15. https://www.korea.kr/news/policyNewsView.do?newsId=148958025
- [S10] Policy briefing "Year-end settlement preview service starts on the 5th", 2025.11.5. 2025 tax year. https://www.korea.kr/news/policyNewsView.do?newsId=148954010