Korea’s Ten-Year Gift Rule — Aggregation Splits, the Deduction Merges

“Ten years” appears twice in Korea’s gift tax. Once in the deduction ceiling, once in the aggregation rule. Same number — but they count people differently, and that is where most of the confusion lives.

First: splitting does not reduce it

Say KRW 400m is going to an adult child. Three ways of doing it.

Why it comes out exactly equal

Not a coincidence — the statute is built to produce it. The second gift is computed like this.

Add the KRW 19.4m paid earlier and you get 58.2m — the single-gift figure. Adding back restores the rate band, and the credit prevents double taxation: the two articles move as a pair. Either one alone would give the wrong answer.

So “split it and use the low band twice” is true only outside ten years. Inside, however many pieces, it all comes back together at the end.

“The same person” — two parents are one

Article 47(2) aggregates gifts from “the same person,” and there is a parenthesis: where the giver is an ascendant, that ascendant’s spouse is included.

So from a child’s side, father and mother are one person. Take KRW 200m from your father and KRW 200m from your mother the same year, and the second return adds the first back. Receiving separately does not avoid it.

Grandparents, by contrast, are a different same-person from the parents (though the two of them are one between themselves). What comes from parents and what comes from grandparents do not aggregate with each other.

There is a floor: gifts aggregate only when the ten-year total reaches KRW 10m or more. Below that, nothing is added back.

The deduction, however, merges them

This is the point of the article. The KRW 50m in article 53(2) is a single ceiling attached to “a gift received from an ascendant” — there is no separate 50m for parents and another for grandparents.

Take KRW 50m from your parents and the deduction is spent; anything from a grandparent afterwards is taxable in full. “More givers, more allowance” is the most expensive misreading in this part of the Act.

Running parents 200m plus grandparents 200m

Suppose KRW 200m comes from the parents first, then KRW 200m from the grandparents. A gift straight from a grandparent carries a 30% generation-skipping surcharge (article 57).

The middle steps run like this. The parents’ share has a base of KRW 150m and a computed tax of 20m; the grandparents’ share gets no allowance, so its base is the full 200m, the computed tax 30m, and a 9m surcharge goes on top. The 3% filing credit comes off both at the end.

The result is counter-intuitive — even carrying the KRW 9m surcharge, it comes out KRW 0.97m lower. Splitting the aggregation means the 20% band gets used twice, and that gain just clears the surcharge and the lost deduction.

But this holds only at this size. Push the amounts up until the grandparents’ share reaches the 30% band and the larger surcharge flips it. Do not generalise it into “involve the grandparents and save” — run both cases at your own numbers in the calculator.

The 30% surcharge has two exceptions

Remembering it as “straight from a grandparent means 30%” misses two places. Article 57(1) carries three rules in one sentence — the main clause, a bracket, and a proviso.

The bracket — 40%. It applies where the recipient is a lineal descendant other than a child and a minor, and the gift exceeds KRW 2bn. Both conditions are needed — a minor under 2bn still pays 30%, and an adult over 2bn still pays 30%. For a minor grandchild receiving KRW 2.5bn, 30% against 40% is KRW 80,704,000.

The proviso — no surcharge. “Provided that this shall not apply where the donor’s nearest lineal descendant has died and that deceased person’s own nearest lineal descendant receives the gift.” So if the father has already died, grandfather to grandchild carries no surcharge. The provision exists to stop a generation being skipped for tax — where there is no generation left to skip, there is nothing to charge for.

So the KRW 37.83m in the table above assumes the parent is alive. Under the proviso the surcharge drops out, that figure becomes KRW 29.1m, and the total becomes 48.5m — 9.7m lower than taking the whole 400m from the parents (58.2m).

The surcharge attaches to the computed tax, not to the taxable base. The method of calculating it is left to Presidential Decree (article 57(2)) — and we opened that Decree on 18 September 2026.

The surcharge has its own “already paid” — Decree art. 46-3

The earlier version said “we did not open that Decree”. Opened, it turns out to contain the ten-year aggregation twice — the very subject of this article.

First, the KRW 2bn test for the 40% rate also runs on the ten-year total. Paragraph (1) says not to measure it on this gift alone but on the gift plus the prior gifts added under art. 47(2). A minor grandchild who received 600m from the same grandparents five years ago and 1.5bn now is under 2bn on either gift, but 2.1bn together — the 40% box.

Second, the surcharge carries the same structure as the credit for tax already paid. It subtracts the surcharge already paid. When a prior gift is aggregated, 30% is applied again to the whole computed tax, and this subtraction stops it being surcharged twice — what article 58 does in the table above, this does in the surcharge box. A negative result is zero, not a refund.

Third, the 30% attaches to the grandparents' share, not to the whole. The formula carries a ratio: value from lineal ascendants other than the parents, over total gifted value. In the 200m example above that ratio is 1 — the whole of that filing came from the grandparents — so 30m × 30% = 9m, exactly as written. No figure in this article changed. The ratio falls below 1 only where a parent's share and a grandparent's share land in the same taxable amount.

Which day does the ten years run from?

Ten years back from the date of this gift. Not the filing date and not the payment date — the date the gift was received.

So KRW 200m received on 1 June 2016 is not added to a gift made on or after 1 June 2026. A single day can move KRW 19.4m — that is the gap between the second and third rows above.

Whether the exact tenth anniversary falls inside or outside is still unsettled. The article says only “within ten years before the gift date” (47(2)), and how the period is counted is handed off by Framework Act article 4 to the Civil Act. The Civil Act rules on excluding the first day (157) and counting by calendar (160) are written for periods running forwards, and whether they map cleanly onto a period counted backwards is not settled by the text alone. If your dates are one day apart, confirm with the tax office before acting — in the table above that day is worth KRW 19.4m.

Questions that remain

If my father and mother give separately, is it KRW 50m each?

No. The deduction is one KRW 50m across all ascendants (article 53(2)). And father and mother are one person for aggregation too (article 47(2)), so receiving separately changes nothing. Here the two articles happen to point the same way — they diverge once grandparents are involved.

Under KRW 10m, is no return needed?

KRW 10m is the aggregation floor, not a filing exemption. It means that if the ten-year total falls short of 10m, the earlier gifts are not added to this one’s taxable amount. The duty to file the gift itself survives even at zero tax (article 68(1)) — and that filing is what evidences how much deduction has been used.

Does the KRW 50m deduction come back after ten years?

Yes. The deduction ceiling is also a ten-year aggregate, so as earlier gifts fall outside the window the ceiling is restored. That is why the third row above is 19.4m twice — the second KRW 200m gets a fresh KRW 50m.

If I give the gift back, does it un-happen?

The provision exists (article 4(4)). But it opens with a parenthesis: “other than money”. Cash received into an account does not un-happen by being sent back — this is where it most often goes wrong.

For property that is not money, three windows.

The filing deadline is three months from the end of the month of the gift, so the widest window is a little over four months. And if the office determines the base and the tax before the return is made, the first row does not apply (article 76). How tax already filed and paid is recovered we did not check.

Is every transfer between accounts a gift?

Living expenses and education costs are carved out by article 46. But the wording turns on what is “socially accepted”, which cannot be reduced to a figure. That part is quoted in full in the gift tax deduction limits. We could not establish the boundary numerically.

The deductions and tax on the inheritance side can be tried in the inheritance tax calculator.

Sources and where to check

Inheritance and Gift Tax Act article 47(2) — gifts received within ten years before the gift date from the same person (including, where the giver is an ascendant, that ascendant’s spouse) are added back once they total KRW 10m or more.

Article 53(2) (KRW 50m from ascendants, 20m to a minor) · 56 (rates) · 58 (credit for tax already paid) · 68(1) (filing deadline) · 69(2) (3% filing credit).

Article 57(1) — “Where the recipient is a lineal descendant of the donor who is not their child, an amount equal to 30/100 (or 40/100 where that descendant is also a minor and the gift exceeds KRW 2bn) of the computed gift tax shall be added. Provided that this shall not apply where the donor’s nearest lineal descendant has died and that person’s nearest lineal descendant receives the gift.”

The same-person test was checked with particular care. The first source consulted stated that an ascendant’s spouse counts as a separate giver — the opposite of the statute. Two further unrelated sources were opened before writing, both confirming that parents are one person and grandparents are separate. Article 47(2) was opened and read on the national statute portal on 26 August 2026. The parenthesis is there in the text — “the same person (including, where the giver is a lineal ascendant, that ascendant’s spouse)”. Article 53 was read too, and all four sub-paragraphs matched what this piece says, down to KRW 10m for blood relatives within four degrees and relatives by marriage within three. No figure needed correcting, and the two gaps left open — returning a gift, and how the period is counted — are now filled.

On 11 September 2026 article 57 was opened and the surcharge re-examined. This article had described it as a flat 30%, but the same paragraph also carries 40% and a case with no surcharge at all — 40% for a minor receiving over KRW 2bn, and nothing where the donor’s nearest descendant has already died. A new section above sets that out. The 30% itself, and every figure in this article, stood unchanged.

On 18 September 2026 Decree art. 46-3 — the one left “unopened” — was opened. The formula sits in the provision as an image equation, invisible to text scraping; it was transcribed from the alt text. Three things came out of it: (1) the KRW 2bn test for the 40% rate runs on the ten-year total; (2) the surcharge already paid is subtracted; (3) the 30% attaches only to the grandparents' share. In this article's example that share is the whole, so the 9m stood and no figure changed.

Where to check further

The date of the earlier gift. The date matters before the amount does — inside or outside ten years decides the tax.

The earlier return. How much deduction was used is recorded there. If nothing was filed, there is no record.

Whether the surcharge applies at all. Whether the recipient is a minor, whether the gift passes KRW 2bn, and whether the middle generation is still living decide between 30%, 40% and nothing.

Your own numbers. Whether involving grandparents helps flips with the size of the gift — run both through the gift tax calculator.