The year-end tax settlement, explained

What 연말정산 is

Korean employers withhold income tax from every salary payment using a simplified table that deliberately over-withholds. In February the employer reconciles what you actually owed for the previous calendar year against what was taken, and the difference is paid back to you — or, occasionally, collected.

It is often described as "the thirteenth month's salary" in Korean offices. That is optimistic, but the refund is real and for many people it runs to seven figures in won.

Foreign employees are in the same system as everyone else. There is no separate foreigner process, no opt-out, and — importantly — no reason to skip it because the interface is in Korean.

The calendar

The May window is the safety net people forget about. If your employer's settlement missed a deduction, or you elected the flat rate and should not have, May is when you fix it.

Step one: the simplified service does most of the work

Log into Hometax with a joint certificate, a simple password, or mobile identity verification, and open 연말정산간소화 — the simplified year-end settlement service.

It already holds, reported directly by the institutions concerned:

• Health insurance, pension and employment insurance contributions.
• Credit and debit card spending, and cash receipts.
• Medical expenses.
• Insurance premiums.
• Pension savings contributions.
• Education expenses.
• Donations to registered organisations.

Download the PDF and hand it to payroll. For a single person with no dependants that is often the entire job.

Step two: what the simplified service misses

These are the ones you have to add yourself, and they are where the money is.

Housing rent deduction (월세액 세액공제)

If you rent, earn below the income threshold, and have your address registered at the rented property, you can claim a credit on rent paid. You need the lease agreement, proof of payment (bank transfers, not cash), and your address registration.

Foreign residents are eligible on the same terms as Koreans, provided the address is registered. A great many foreign tenants never claim this because nobody mentions it.

Dependants

₩1.5 million for each qualifying dependant, and it stacks with medical, education and card deductions for those people. A dependant must have annual income of ₩1 million or less, and cohabitation rules apply with relaxations for a spouse and lineal relatives.

Dependants living abroad can qualify. If you support parents overseas who meet the income test, you may be able to claim them — you will need family relationship documents, apostilled and translated, and evidence of the support. Ask payroll and be prepared to explain it, because it is unusual enough that many payroll teams have not seen it.

Foreign-issued documents generally

Anything from outside Korea needs translation and often legalisation. Start in November if it matters to you.

The credit card rule, which surprises everyone

Card and cash-receipt spending is only deductible above a threshold of 25% of your total salary. Spend less than that and you get nothing.

Above the threshold, the deduction rate differs by payment method:

• Credit cards — the lowest rate.
• Debit cards, prepaid cards and cash receipts — roughly double the credit card rate.
• Traditional markets and public transport — higher still, with separate additional limits.

The practical strategy: spend up to the 25% threshold on a credit card for the card benefits, then switch to a debit card for the rest of the year. And always ask for a cash receipt (현금영수증) when paying cash — give your phone number at the till and it is recorded automatically.

Public transport spending is worth registering your transport card against your registration number for the same reason.

Step three: submit and check

Payroll gives you a form to complete alongside the documents. Fill it in carefully — the dependant section in particular is where errors happen.

When the settlement is done you receive an income tax withholding receipt (원천징수영수증). Keep it. You will need it for:

• Your own country's tax return, if you are also filing there;
• Bank remittance limits, as proof of the source of funds;
• F-2-7 and F-5 applications, as income evidence;
• Any future loan application.

If you elected the flat rate

Then none of the above applies. The 19% election bars every deduction and credit, so your settlement is simply 20.9% of gross against what was withheld. It is trivially simple — and for most salaries it is also considerably more expensive.

If you elected it and now suspect it was wrong, the May final return is where you correct the position. Do not assume February was final.

If you leave Korea mid-year

Your employer must run the settlement early, in your final pay period, rather than the following February. Many payroll teams know this; some need reminding.

• Ask for it in writing at least a month before your last day.
• Gather all deduction evidence now — this is your only chance.
• Keep the account open until the refund lands.
• Take a copy of the withholding receipt with you.

See the leaving Korea checklist for the full sequence.

Common mistakes

• Not doing it at all because the interface is Korean. The refund is real money and payroll will help.
• Missing the rent credit because nobody mentioned it.
• Not claiming dependants abroad because it seemed unlikely to work.
• Paying cash without a cash receipt all year.
• Electing the flat rate on a mid-range salary without running the numbers.
• Assuming February was final and never using the May window.

Where to get help

• Your payroll team, first. It is their job and they do it for everyone.
• The NTS English helpline on 1588-0560.
• NTS runs English-language year-end settlement seminars for foreign taxpayers most years — worth attending once.
• A licensed tax accountant (세무사) if you have foreign income, equity compensation, or a complicated year.