A Korean gift tax return is due even when the tax is zero. File on time and 3% comes off; fail to file and 20% goes on — 23 percentage points on the same tax. And there is separate interest accruing by the day.
The deadline is three months from the end of the month in which the gift was received (article 68(1)). Not three months from the gift — the month is completed first. Receive on 3 August and the return is due 30 November.
On time — 3% off (article 69(2)). No return — 20% on (Framework Act on National Taxes article 47-2). By improper means — 40%.
On top of that, late-payment interest of 22 per 100,000 a day, or 8.03% a year.
KRW 300m received, no return filed
An adult child receives KRW 300m from a parent. The tax before credits is KRW 40m.
| Non-filing penalty | Late-payment interest | Total | vs on time | |
|---|---|---|---|---|
| Filed on time | — | — | KRW 38.8m | — |
| Unfiled, 1 year | KRW 8m | KRW 3,212,000 | KRW 51,212,000 | + KRW 12,412,000 |
| Unfiled, 2 years | KRW 8m | KRW 6,424,000 | KRW 54,424,000 | + KRW 15,624,000 |
| Unfiled, 5 years | KRW 8m | KRW 16,060,000 | KRW 64,060,000 | + KRW 25,260,000 |
The KRW 8m non-filing penalty lands once and stops growing. What grows is the late-payment interest — 22 per 100,000 a day is 8.03% a year. That interest takes about two and a half years to overtake the non-filing penalty (calculated directly).
Late, but filing anyway, costs less
Missing the deadline is not the end of it. Article 48 of the Framework Act reduces the penalty on a late return — and the sooner, the more.
| After the deadline | Penalty reduced by | Penalty in the example |
|---|---|---|
| Within 1 month | 50% | KRW 4m |
| 1 to 3 months | 30% | KRW 5.6m |
| 3 to 6 months | 20% | KRW 6.4m |
| Over 6 months | none | KRW 8m |
The first month after realising is worth KRW 4m. “It is already late, so later is fine” is the expensive choice here.
This reduction applies where you file before the tax office finds it. After notice of an audit, it does not.
The 3% credit is not 3% of the whole tax
This one shows up only when you do the arithmetic. Article 69(2) applies the 3% to the tax after the other credits have been subtracted.
Take an adult child who received KRW 200m and then another KRW 200m inside ten years.
| Amount | |
|---|---|
| Tax on a base of KRW 350m | KRW 60m |
| Credit for tax already paid | − KRW 20m |
| What the 3% is applied to | KRW 40m |
| Filing credit | KRW 1.2m |
| Taking 3% of the full KRW 60m instead | KRW 1.8m |
| Difference | KRW 0.6m |
The gap only opens when there is an earlier gift — on a first gift there is nothing to subtract and the two agree. The calculator applies the 3% after the subtraction.
Why file when the tax is zero
Even inside the deduction, filing is worth doing. Three reasons.
① It records how much deduction has been used. A second gift inside ten years has to add the first back, and this return is the evidence. Without it, the burden falls on you.
② It answers questions about the source of funds. When a property purchase or a large transfer draws a query, “a gift from my parents, filed at the time” is the shortest possible answer.
③ Filing closes the window. Where nothing is filed, the period during which tax can be assessed is described as running considerably longer — though exactly how many years we could not verify against the statute. Do not file it under “old enough to be safe.”
Questions that remain
Received on 3 August — when is it due?
30 November. The article says three months from the end of the month in which the gift was received (68(1)), so the count starts on 31 August. Not 3 November — you get 27 extra days. Receive near the end of a month and that cushion shrinks.
If I cannot pay, should I delay filing too?
The opposite. Filing and paying are separate. File and the 20% non-filing penalty does not arise; what remains is the late-payment interest at 8.03% a year. In the example above that is the difference between KRW 8m landing and not landing — and filing also earns the 3% credit. File even with no money to pay.
Can it be paid in instalments?
There are instalment and long-term deferral schemes for larger amounts. The thresholds, periods and security requirements we could not verify against the statute. The inheritance tax side is set out in the inheritance tax guide, but the gift tax conditions may differ, so they are not copied across — ask when you file.
What if I under-reported by mistake?
The under-reporting penalty is described as 10% — half the non-filing rate — and 40% by improper means. Filing a corrected return yourself reduces it by timing as well. The exact reduction bands we could not verify — check whether they match the non-filing ones (50% within a month, 30% within three, 20% within six) before relying on them.
What if my parents pay the tax for me?
Gift tax is paid by the recipient. So when the giver pays it, that payment is treated as a further gift — tax on tax. How it is computed, and what exceptions apply, we could not verify against the statute. If that is the plan, confirm this point first.
Sources and where to check
Inheritance and Gift Tax Act article 68(1) (three months from the end of the month of the gift) · 69(2) (the 3% filing credit, applied after other credits).
Framework Act on National Taxes article 47-2 (non-filing penalty 20%, 40% by improper means) · 47-3 (under-reporting 10%) · 47-4 (late payment, 22 per 100,000 a day) · 48 (reduction for a late return).
The rates and reduction bands were cross-checked against two unrelated sources. Every figure in the tables was rebuilt from the rate table, and the 8.03% annual equivalent comes from multiplying 22/100,000 by 365 directly. The statute itself could not be opened — the national law portal blocks automated retrieval.
Where to check further
The date the gift was received. The deadline runs from it. Where the transfer date and the registration date differ, establish which applies.
The gift tax screen on Hometax. A zero return is filed there too.
If the deadline has passed, how many days ago. One month, three, six — those thresholds decide the reduction.
For the tax itself, put the amounts into the gift tax calculator. If there was an earlier gift inside ten years, read how the ten-year rule actually works first.
