Year-End Tax Settlement in Korea for Foreigners: Your…

Your January payslip comes with homework.

Korea runs a once-a-year tax check called yeonmal jeongsan (year-end tax settlement). All last year, your employer took income tax from each paycheck using an estimate. Now that estimate gets corrected. Some people get money back. Others owe more.

You probably got an HR email in a mix of Korean and English. It lists forms you’ve never seen. The deadline is already close. Your Korean coworkers seem calm about it. You’re not.

That’s normal. This guide covers what the settlement is, which papers matter, and one tax choice that only foreigners get to make. You’ll need a valid ARC (Alien Registration Card) for most steps, since your ARC number is your tax ID. ARC registration Korea

Why does your employer file this, not you?

In Korea, employers withhold income tax every month using a simplified table. Year-end settlement is the employer’s legal duty to recalculate your real tax for the full calendar year. They apply your deductions, then refund or collect the difference through payroll. Most salaried workers on E-7, F-2, F-4, F-5 or F-6 status never file a separate tax return.

The legal basis is the Income Tax Act. Your employer acts as the withholding agent. It handles the filing with the National Tax Service (NTS) on your behalf.

Most companies follow this timeline:

1. Mid-January: NTS opens the simplified data service on Hometax. Your card spending, medical bills and insurance premiums appear there automatically.
2. Late January to February: You hand documents to your employer by the company’s own deadline.
3. February or March payslip: Your refund or extra tax shows up on your pay.
4. March 10: Your employer files your wage withholding statement with NTS.

Two terms matter here. A refund means too much tax was withheld. An additional payment means too little was. Neither one is a penalty.

Who’s covered? Anyone paid regular wages by a Korean employer. That includes E-7 professionals, E-9 workers, F-visa holders, and D-2 or D-10 holders with permitted part-time jobs on payroll. Daily workers are the main exception. Their tax is final once it’s withheld.

So the process is mostly automatic. The part that isn’t automatic is the paperwork. That’s where foreigners quietly lose money.

Which documents to submit to your employer actually matter?

Most employers ask for three things: a deduction claim form, the PDF of your simplified data from Hometax, and proof of anything Hometax can’t see. Foreign workers often add an ARC copy, a flat tax application if they choose the 19% rate, and family documents for dependents abroad. A missing document usually means a lost deduction, not a fine.

Here’s the usual checklist:

• Deduction claim form (sodeuk seaek gongje singoseo). HR gives you this, often inside the payroll system.
• Simplified data PDF (ganso-hwa jaryo). Download it from Hometax after logging in with your ARC number and a certificate or simple authentication app.
• Lease contract and rent transfer records, if you claim the monthly rent tax credit.
• Receipts Hometax may miss, such as eyeglasses, school uniforms or some donations.
• Your previous employer’s withholding receipt (geunro sodeuk wonchon jingsu yeongsujeung), if you changed jobs this year.
• A flat tax application, only if you choose the 19% rate.
• Family relationship documents, if you claim dependents.

Here’s the catch. Hometax only sees Korean records. Medical bills, insurance or tuition paid outside Korea won’t show up there. Ask HR whether a specific foreign expense qualifies before you spend hours gathering receipts.

Two thresholds explain why some people get almost nothing back. Card spending only starts counting after it passes 25% of your total salary. Medical expenses only earn a credit above 3% of your total salary. If you spent little, your deductions stay small.

But before you collect a single receipt, answer one question first. It can make every receipt on this list useless.

Flat tax vs progressive tax election: when does 19% actually win?

Eligible foreign workers can choose a single 19% rate on total wages instead of Korea’s progressive rates of 6% to 45%. The flat rate applies to all pay, including allowances that are normally tax-free. You also lose every deduction and credit. Local income tax adds 10% on top, so the real rate is 20.9%. It usually helps only high earners.

The rule comes from the Restriction of Special Taxation Act. You can read the full text on MOLEG.

Restriction of Special Taxation Act, Article 18-2 (summary): a foreign worker who started working in Korea may apply a 19% rate to wage income, in place of the standard rates, deductions and credits, for tax years ending within 20 years of the start of work, if the worker applies for it.

Under current law, this applies to foreigners who began working in Korea by December 31, 2026. Tax laws get extended often, so check NTS before you rely on that date.

Now compare it with the normal system. These are the progressive rates under the Income Tax Act:

These rates apply to taxable income, not salary. Before the table kicks in, the earned income deduction, basic deductions and insurance deductions shrink your income a lot. Then tax credits cut the result again.

What does that mean in practice? On a KRW 40 million salary, the effective progressive rate typically lands in single digits. Even near KRW 100 million, it usually stays below 19%. For most foreign workers, the flat tax costs more.

Who might benefit? High-income executives, often with large allowances, and few deductions to claim. Ask your payroll team to calculate both. Many payroll systems can.

A few rules to know:

• Daily workers can’t use the flat rate.
• Employees of a company they’re closely related to (for example, a major shareholder) are excluded.
• You apply by giving the flat tax application to your employer with your settlement papers, or by filing it with a May return.
• The election covers that whole tax year’s wages.

If you stay on progressive rates, one deduction can be worth a lot. Especially if your family lives back home.

Can you claim family who live outside Korea?

Often, yes. A tax-resident foreign worker can claim a KRW 1.5 million basic deduction for each qualifying dependent. That includes parents or children who live abroad. Each person must meet Korea’s age and income limits. You also need proof of the relationship, usually an official family document from your home country with a Korean translation.

This is the dependent deduction for foreign family, and many foreigners never claim it. It only works under progressive rates. Flat tax users get nothing from it.

The basic limits are:

• Spouse: annual income of KRW 1 million or less (KRW 5 million if it’s only wage income).
• Parents or grandparents: age 60 or older, with the same income limit.
• Children or grandchildren: age 20 or younger, with the same income limit.
• Dependents with disabilities: no age limit.

You must also be a Korean tax resident. In general, that means your home is in Korea or you’ve lived here 183 days or more. Non-resident workers can’t claim dependents.

What proof do employers want? Usually an official family register, household registration or birth certificate from your home government, plus a Korean translation. Some employers also ask for an apostille or embassy confirmation. For parents abroad, many also request remittance records showing you support them.

Two traps catch people. First, income abroad still counts toward the limit, including a parent’s pension. Second, one dependent can only be claimed once. If your sibling in Korea already claims your mother, you can’t.

If you’re on F-6 or F-5 and married to a Korean citizen, it’s simpler. Your spouse’s family relationship certificate from Government24 may already show the link.

Note that tax dependents and health insurance dependents follow separate rules. Being listed under one doesn’t put someone under the other. NHIS dependents for foreigners

All of this assumes you stayed in one job all year. Life rarely works that way.

You resigned mid-year. Who finishes your tax?

When you leave a job, your employer runs a short settlement with your final pay. It applies only basic deductions. If you join a new employer the same year, give them the old withholding receipt and they settle the full year. If you don’t, use the resigned mid-year filing route: a comprehensive income tax return on Hometax in May.

Here’s what actually happens in each case.

You found a new job in the same year

Ask your old employer for your withholding receipt. Give it to your new HR team before their settlement deadline. The new employer then combines both incomes and runs one settlement in January or February.

Skip this step and your second employer settles only its own wages. Your tax ends up miscalculated.

You had no job on December 31

No employer will settle for you. You file a jonghap sodeukse (comprehensive income tax) return yourself, between May 1 and May 31. Hometax has an English interface, and the return pulls in your withholding data automatically.

This is often worth doing. Your leaving-day settlement ignored your card spending, medical costs and dependents. Filing in May lets you claim them.

You’re leaving Korea for good

Your employer settles your tax when you depart, using what it knows at that point. If you expect to claim more deductions, file before you leave or appoint a tax agent in Korea. E-9 workers finishing their contracts often have pension and insurance refunds to arrange at the same time. national pension lump-sum refund

Whichever route you took, one question remains. Did the money actually come back?

How do you run a refund check on Hometax and fix mistakes?

After your employer files by March 10, log in to Hometax and view your wage withholding statement. It shows your final tax, the amount already withheld and the difference. If a deduction is missing or wrong, you can file a correction claim for up to 5 years after the May filing deadline. Refunds from the employer settlement usually arrive through payroll.

To do a refund check on Hometax:

1. Open Hometax and switch to English if you need it.
2. Log in with your ARC number using a certificate or a simple authentication app.
3. Find the withholding statement (jigeup myeongseseo) lookup. Menu labels change often, so type the term into the site search bar.
4. Open the statement for last year.
5. Compare the determined tax (gyeoljeong seaek) with the tax already paid (ginap bu seaek). A negative difference means a refund.

The number looks wrong? Check with HR first. Small errors, like a missed dependent, are easy to fix before March 10.

After that, it’s on you. File a gyeongjeong cheonggu (correction claim) on Hometax. You have 5 years from the May 31 deadline for that tax year. That’s long enough to recover deductions you skipped in past years too.

Stuck in a menu? The NTS call center at 126 offers support in English. Ask for the foreign language option.

What to do this week

Check when your HR team’s settlement deadline falls. Confirm your ARC hasn’t expired, because Hometax login depends on it. Decide whether to compare the flat tax, and ask payroll to run both numbers. If you plan to claim family abroad, request documents from home now. Overseas paperwork and translation can take weeks, and the January window closes fast.