Year-End Tax Settlement (연말정산)
Korea does not ask most employees to file a return. Your employer withholds tax from each month's salary against an estimate, then reconciles that estimate against what you actually owed — that reconciliation is 연말정산. It happens early in the year for the year just ended. A refund is not a bonus; it means you were over-withheld and lent the government money interest-free. A bill means the opposite.
Who this affects
- Employees on a Korean payroll, including foreign nationals
- Anyone who changed jobs during the year — the new employer needs the previous 원천징수영수증
- Employees who also have side income, who may still need to file in May
- Anyone supporting dependants, who must register them to claim the deduction
Hometax assembles most of the evidence for you
The 간소화 서비스 pulls together the deductible spending the tax office already knows about — card usage, insurance premiums, medical and education payments, pension contributions. It is convenient but not exhaustive: anything a provider did not report has to be documented by you.
The gaps are where the money is
Items that routinely fall outside 간소화 include some medical expenses, donations to smaller organisations, monthly rent, and nursery or tuition fees paid to certain providers. These are exactly the deductions people lose by assuming the automated list is complete.
Deductions and credits are not the same thing
Korea uses both 소득공제, which lowers the income the rate is applied to, and 세액공제, which reduces the calculated tax directly. Two items of the same size are worth different amounts depending on which type they are, and which one applies is set by statute.
It settles employment income, not everything
If you also had business, freelance, rental or significant financial income, 연말정산 does not close your year. Those are reconciled in the May 종합소득세 return, and the employment income already settled is carried into it.
Common questions
I started my job in the middle of the year. What do I do?
Give your current employer the 원천징수영수증 from your previous job so both periods are settled together. Without it, the new employer can only settle the portion it paid you, which usually produces a wrong result.
Do foreign employees go through 연말정산 too?
Yes. Foreign nationals on a Korean payroll settle the same way, and the National Tax Service publishes an English guide each year. Some foreign workers can also elect a separate flat-rate method — worth comparing rather than assuming.
I got a big refund. Is that good?
It means you over-paid during the year and are getting your own money back without interest. It is not a gain. If it happens every year, your withholding assumptions are probably worth revisiting.
I missed a deduction. Can I fix it after the fact?
Usually yes. Missed deductions can generally be claimed afterwards through a corrected filing, within the statutory window. This is a common reason to speak to a 세무사 rather than write the money off.
Official sources
General information, not tax advice. Rules and thresholds change, and how they apply depends on your circumstances — confirm with a licensed professional before acting.