Most people already know the headline: in Korea, a parent can give an adult child up to 50 million won every ten years without gift tax. The hard part comes right after. Say you wired 30 million won five years ago to help with a jeonse deposit, and now you want to hand over another 50 million won for a wedding. Does tax apply? If so, how much? And exactly how long do you have to wait before the full 50 million won exemption is available again?
Search results are full of tables listing deduction amounts, but very few explain the one thing that actually decides your bill: which date the ten years are counted from. This article pins down that starting point first, then works through the real tax owed at each gift size when prior gifts already exist. It also covers the switch from the 20 million won minor limit to the 50 million won adult limit, whether the 100 million won marriage and childbirth deduction stacks on top, and why a gift from a grandparent costs 30 percent more.
1. If You Already Gifted Before, What Does Another Gift Cost Now
Start with the most urgent number. Whatever you gave an adult child within the last ten years reduces the remaining deduction, and tax applies only to the amount above what is left. The table below assumes an additional gift of 50 million won today.
| Gifted within last 10 years | Remaining deduction | Taxable base on new 50M gift | Calculated tax | After 3% filing credit |
|---|---|---|---|---|
| None | 50,000,000 won | 0 | 0 | 0 |
| 10,000,000 won | 40,000,000 won | 10,000,000 won | 1,000,000 won | 970,000 won |
| 20,000,000 won | 30,000,000 won | 20,000,000 won | 2,000,000 won | 1,940,000 won |
| 30,000,000 won | 20,000,000 won | 30,000,000 won | 3,000,000 won | 2,910,000 won |
| 50,000,000 won | 0 | 50,000,000 won | 5,000,000 won | 4,850,000 won |
Back to the opening example: a child who received 30 million won five years ago and now receives another 50 million won has a taxable base of 30 million won and owes about 2.91 million won. Tax does not hit the entire new gift, only the part above the 20 million won of deduction still available.
Here is how the bill scales as the gift itself grows, assuming no gifts at all in the previous ten years.
| Gift amount | Taxable base | Marginal rate | Calculated tax | After filing credit |
|---|---|---|---|---|
| 50 million won | 0 | — | 0 | 0 |
| 100 million won | 50 million won | 10% | 5,000,000 won | 4,850,000 won |
| 200 million won | 150 million won | 20% | 20,000,000 won | 19,400,000 won |
| 300 million won | 250 million won | 20% | 40,000,000 won | 38,800,000 won |
| 500 million won | 450 million won | 20% | 80,000,000 won | 77,600,000 won |
| 1 billion won | 950 million won | 30% | 225,000,000 won | 218,250,000 won |
The rate structure behind those numbers works like this: multiply the taxable base by the bracket rate, subtract the progressive deduction, then take 3 percent off if you file within the deadline.
| Taxable base | Rate | Progressive deduction |
|---|---|---|
| Up to 100 million won | 10% | None |
| 100 million to 500 million won | 20% | 10 million won |
| 500 million to 1 billion won | 30% | 60 million won |
| 1 billion to 3 billion won | 40% | 160 million won |
| Over 3 billion won | 50% | 460 million won |
For your own figures, enter the gift amount and the relationship into the gift tax calculator rather than working through the brackets by hand.
2. Where the Ten Years Actually Start
This is the point most articles skip. The ten-year window has nothing to do with calendar years or any fixed tax period.
The window is measured backward from the date of the new gift Whatever was received in the ten years immediately preceding that date gets aggregated.
There is no fixed block of ten years that expires and resets. Every time you make a gift, you open a fresh ten-year window looking backward from that moment. That distinction changes real outcomes.
- A gift of 20 million won received on 1 March 2016, followed by a new gift on 28 February 2026: the earlier gift still falls inside the backward-looking window, so it aggregates.
- The same case, but you wait one more day and gift on 2 March 2026: the 2016 gift drops out of the window. Nothing aggregates, and the full 50 million won deduction is available again.
Because a single day can change the bill, it is worth confirming the exact safe date. Find the true gift date on a bank transfer record or a past gift tax return, then enter that date plus ten years into the date calculator to see precisely when the window clears.
Who Counts as the Same Giver: Father and Mother Are One
The second trap. The idea that a child can receive 50 million won from a father and another 50 million won from a mother for 100 million won tax free does not hold. For lineal ascendants, the law treats a spouse as the same person, so parents are counted together. The 50 million won deduction is a single shared allowance across both.
Grandparents are a separate person for aggregation purposes. However, the 50 million won deduction is a combined lifetime-window allowance measured on the recipient across all lineal ascendants. If parents have already used the full 50 million won, nothing is left to apply against a gift from grandparents.
| Giver | Aggregation group | Deduction available |
|---|---|---|
| Father | Parents, treated as one person | Shared 50 million won for lineal ascendants |
| Mother | Parents, treated as one person | Draws on the same shared allowance |
| Grandparents | Separate from parents | Only the unused balance of that allowance |
| Parents-in-law | Other relatives | Separate 10 million won |
3. Moving from the 20 Million Minor Limit to the 50 Million Adult Limit
A minor child gets a deduction of only 20 million won per ten-year window. At the age of majority (19 in Korea) the limit rises to 50 million won. The common misunderstanding is that turning 19 grants a fresh 50 million won. It does not. You still subtract whatever deduction was used inside the backward ten-year window.
Take a child who received 20 million won at age 15.
| Timing of gift | Applicable limit | Deduction already used in window | Deduction available now |
|---|---|---|---|
| Age 15, first gift | 20 million won | 0 | 20 million won |
| Age 20, five years later | 50 million won | 20 million won | 30 million won |
| Age 25, ten years later | 50 million won | 0, the first gift has aged out | 50 million won |
Gifting 50 million won at age 20 gives only 30 million won of deduction, leaving a taxable base of 20 million won and roughly 1.94 million won of tax. Waiting until age 25 pushes the first gift outside the window and lets the whole 50 million won pass tax free. If the money is not urgently needed, those five years of patience are worth about 1.94 million won.
4. Splitting Gifts at Ages 0, 10, 20 and 30
Turn the aggregation rule around and the strategy becomes obvious: spacing gifts ten years apart maximizes what passes untaxed. Here is a schedule that fills the limit every decade from birth.
| Age at gift | Status | Deduction limit | Amount gifted | Tax |
|---|---|---|---|---|
| 0 | Minor | 20 million won | 20 million won | 0 |
| 10 | Minor | 20 million won | 20 million won | 0 |
| 20 | Adult | 50 million won | 50 million won | 0 |
| 30 | Adult | 50 million won | 50 million won | 0 |
| Total | — | — | 140 million won | 0 |
That moves 140 million won without a single won of gift tax. Handing over the same 140 million won all at once at age 30 would produce a taxable base of 90 million won and about 8.73 million won of tax. Identical money, and the timing alone accounts for the difference.
There is a second effect worth noting. Investment returns earned on gifted principal inside the child's own account generally belong to the child and are not treated as an additional gift. That is the real reason early gifting compounds in your favor. The caveat is control: if a parent keeps managing and withdrawing from the child's account, tax authorities may treat it as a nominal account rather than a completed gift. Filing the gift tax return on time creates the paper trail that settles that question.
The filing deadline is three months from the end of the month in which the gift was received. Even when the tax due is zero because the amount sits inside the deduction, filing fixes the date and amount on record, which matters later when the child has to explain the source of funds.
5. Does the 100 Million Marriage and Childbirth Deduction Stack
Yes. The marriage and childbirth gift deduction introduced in 2024 applies separately from the standard 50 million won lineal ascendant deduction. Combined, they allow up to 150 million won to pass tax free.
| Deduction | Amount | Eligible period | Relationship to the 50M allowance |
|---|---|---|---|
| Lineal ascendant, adult child | 50 million won | Backward ten-year aggregation | The base allowance |
| Marriage gift deduction | 100 million won | Two years before and after marriage registration | Added on top |
| Childbirth gift deduction | 100 million won | Two years from birth or adoption registration | Shares one cap with marriage |
The important limit is that you cannot claim 100 million won for marriage and another 100 million won for childbirth to reach 200 million won. The two share a single combined cap of 100 million won, and unlike the standard deduction it is a once-in-a-lifetime allowance rather than a recurring ten-year one.
The window of two years on either side of marriage registration is generous in practice. Money received in advance for wedding costs and money received later while upgrading a first home both qualify, as long as they land inside that four-year span. Outside it, the same transfer is taxed as an ordinary gift, so it pays to confirm exactly when the two-year mark falls.
6. Why a Gift from Grandparents Costs 30 Percent More
When a grandparent gifts directly to a grandchild, skipping the parent generation, a generation-skipping surcharge adds 30 percent to the calculated tax. If the grandchild is a minor and the gift exceeds 2 billion won, the surcharge rises to 40 percent.
The logic is that passing wealth down through the parent and then to the child would trigger gift tax twice, while skipping a generation triggers it once. The surcharge closes that gap. It does not apply where the parent has already died and the substitute inheritance rules take over.
Compare a 200 million won gift to an adult grandchild, assuming the 50 million won lineal ascendant deduction is still fully available.
| Item | Parent to child | Grandparent to grandchild |
|---|---|---|
| Gift amount | 200 million won | 200 million won |
| Deduction | 50 million won | 50 million won |
| Taxable base | 150 million won | 150 million won |
| Calculated tax | 20,000,000 won | 20,000,000 won |
| Generation-skipping surcharge, 30% | 0 | 6,000,000 won |
| Subtotal | 20,000,000 won | 26,000,000 won |
| After filing credit | 19,400,000 won | 25,220,000 won |
That is a gap of about 5.82 million won. Families still use grandparent gifts when the parent's own ten-year window is exhausted, because skipping a generation also shrinks the estate that will eventually face inheritance tax. Whether the 30 percent surcharge is worth paying depends on the grandparent's total estate and how far off the inheritance is.
7. Choosing the Right Timing for Your Situation
- No urgent need for the money: check the date exactly ten years after the previous gift and wait until after it. A single day can be worth millions of won.
- A wedding is coming: gift inside the two-year window on either side of marriage registration. The 50 million won and the 100 million won together clear 150 million won tax free.
- The child is still young: gift 20 million won now and file the return, so the window can be refilled at 20 million won ten years later and 50 million won after majority.
- The parents' window is already full: consider a grandparent gift, but price in the 30 percent surcharge before comparing.
- The amount exceeds 500 million won: the 30 percent bracket kicks in, so splitting across ten-year windows and layering the marriage deduction beats a single large transfer.
8. Frequently Asked Questions
Q1. Once ten years pass, does the earlier gift disappear completely?
For gift tax aggregation, yes. A gift falling outside the backward ten-year window is not added in, and the full 50 million won deduction becomes available again. Inheritance tax is a separate matter: property gifted to an heir within ten years before the date of death is pulled back into the estate, so clearing the gift tax window does not clear the inheritance tax one.
Q2. Should I file a gift tax return even when the tax is zero?
Filing is strongly advisable. It fixes the date and amount on record, which simplifies proving the source of funds when the child later buys a home, and it establishes the start date of the ten-year window. The return is due within three months from the end of the month in which the gift was received.
Q3. Do living expenses and school fees count toward the limit?
Living expenses and education costs for a dependent, within socially accepted bounds, are exempt and do not consume the allowance. But if money labeled as living expenses is not spent and instead goes into deposits, stocks or property, that portion is treated as a gift. What matters is the actual use, not the label.
Q4. How are stocks or real estate valued instead of cash?
At market value as of the gift date. Listed shares are valued at the average closing price over the two months before and two months after the gift date, four months in total. Real estate uses market value where it can be established, and otherwise a supplementary valuation such as the official assessed price. That valuation becomes the gift value, and deductions and rates then apply exactly as they would to cash.
9. Check Your Remaining Allowance and Tax with the Calculator
Two answers matter right now: when you can gift again cleanly, and what it costs if you gift today. The tables above cover only the common amounts, so running your own figures is faster.
Enter the amount and the relationship into the gift tax calculator and it returns the taxable base after the deduction, the bracket calculation, and the final amount payable after the 3 percent filing credit. If a gift was already made within the last ten years, add it in so the calculation follows the aggregated basis shown in section 1. Then put the earlier gift date and ten years into the date calculator to see, to the day, when the full 50 million won exemption returns.
If property is involved, whether as the gift itself or as a later sale, the guides on the real estate capital gains tax calculator and the apartment acquisition tax calculator round out the picture across acquisition, holding and disposal.
