You worked in Korea all year and your employer withheld income tax from every paycheck. In February, that gets reconciled against what you actually owe — and you get a refund (Korea’s famous “13th-month pay”) or a bill. That reconciliation is 연말정산 (year-end tax settlement), and foreign employees have one option Koreans don’t.
This guide covers what 연말정산 is, the flat-rate choice only foreigners get, the 2026 figures that move your refund, and how to file it through Hometax — plus the mistakes that cost foreign employees money every year.
Why year-end settlement matters for foreigners
Every month your employer withholds an estimated income tax from your salary. That estimate is rarely exact. 연말정산 settles the difference once a year: your employer recomputes your real tax after deductions and credits, compares it to what was already withheld, and the gap is refunded or charged — usually in your February or March pay.
Foreign employees are settled on the same footing as Korean employees. You are not excluded, and you should not skip it — skipping means you forfeit refunds you are owed. The one difference: foreigners can elect a special flat tax rate instead of the normal progressive scale.
The choice only foreigners have: 19% flat rate vs. progressive
A foreign worker can elect a flat 19% tax on gross employment income (plus 1.9% local income tax, so about 20.9% all-in) instead of Korea’s progressive 6%–45% scale.
- Eligibility (as of 2026): you must have started working in Korea by the legal cutoff date — currently 31 December 2026, a sunset that has been extended repeatedly, so verify the current deadline. Once eligible, you can use the flat rate for up to 20 years from the date you first worked in Korea.
- The catch: if you choose the flat rate, you give up all deductions, credits, and exemptions — personal deduction, credit-card, medical, education, pension, even the four-insurance deduction.
So it is a math problem, not a preference:
| 19% flat rate | Progressive 6–45% + deductions | |
|---|---|---|
| Rate | 19% on gross (+1.9% local ≈ 20.9%) | 6–45% on taxable income (+10% local) |
| Deductions / credits | None | 인적공제, credit-card, medical, education, pension, 4대보험, rent, etc. |
| Best for | High earners (often ₩100M+), few deductions | Typical salaries, families, large deductible spend |
| How to elect | Tell your employer at settlement, or NTS at filing | It is the default — do nothing |
Rule of thumb: a high salary with few dependents and little deductible spending often wins with the flat rate; a typical salary with family, rent, or heavy medical/education spend usually wins on the progressive route. The only way to know is to compute both — start from your real net pay in our Korea Take-home Pay Calculator.
The 2026 figures that move your refund (progressive route)
If you take the progressive route, these are the levers (figures as of 2026 — confirm on Hometax before relying on them):
- Four Major Insurances (4대보험): your National Pension, health, and employment-insurance contributions are fully deductible. (See our guide to the four mandatory insurances.)
- Personal deduction (인적공제): ₩1,500,000 per person — yourself plus each qualifying dependent.
- Earned-income deduction (근로소득공제): an automatic deduction scaled to your salary, applied before tax.
- Credit-card etc. deduction (신용카드 소득공제): spending above 25% of your total salary is deductible — credit cards at 15%, and debit cards, cash receipts, traditional markets and public transport at 30% — within annual caps. It excludes taxes, utilities, telecom, new-car purchases, overseas spending and duty-free.
- Tax credits: medical expenses above 3% of salary, education, donations, and private pension-account (연금계좌) contributions generate tax credits (subtracted from tax, not income).
- Standard tax credit (표준세액공제) of ₩130,000 if you do not itemize the special credits.
How to actually file it (step by step)
- Wait for your employer’s request — typically late January to February — for supporting documents.
- Pull your Simplified data from Hometax (hometax.go.kr → 연말정산간소화 / Year-End Tax Simplification). Log in with a digital certificate or the foreigner login. It auto-aggregates your card, medical, insurance and pension data.
- Add what is not captured — some medical bills, donations, overseas tuition, and monthly rent (월세) if you qualify under the income and housing-price limits.
- Submit to your employer (or through the company HR/payroll system). Your employer recomputes the tax and the adjustment appears in your February–March pay.
- If your situation is complex — you left a job mid-year, changed employers, or have multiple income sources — you may instead file the May global income tax return (종합소득세).
Common mistakes foreign employees make
- Defaulting to the 19% flat rate because it sounds simpler — and overpaying by throwing away deductions you were entitled to.
- Missing the monthly-rent (월세) credit, which many eligible foreign renters never claim.
- Not registering qualifying dependents abroad, which is possible in some cases with the right proof.
- Confusing 연말정산 with the National Pension refund. When you leave Korea you may reclaim pension contributions — that is a separate process. See our National Pension refund guide.
- Leaving Korea mid-year without settling. Your employer must run a departure settlement (중도퇴사 정산) before you go.
Next step
Decide your route with numbers, not vibes. Compute your real take-home both ways with the Korea Take-home Pay Calculator. If you are an employer running settlement for foreign staff, our four mandatory insurances guide covers the withholding base.
Disclaimer: This post reflects the author’s experience and publicly available information as of 2026. It is general information, not legal, tax, or immigration advice. Rules and rates change — verify current details with the relevant authority (NPS, NTS, MOJ) or a licensed professional before acting.
