Move house a few times, change jobs a few times, and money ends up sitting somewhere in your name that you never collected. Knowing where to look is not enough, though — each kind of money runs on its own clock, and for some of them “but I got a notice” does not stop that clock. The statutes say so explicitly.
This article was rewritten in August 2026 from Article 54 of the Framework Act on National Taxes, Article 64 of the Framework Act on Local Taxes, Article 115 of the National Pension Act, Article 91 of the National Health Insurance Act and Article 662 of the Commercial Act, read directly on Korea’s National Law Information Center.
Four lines — (1) limitation periods are 3, 5 or 10 years depending on the scheme; (2) ⚠⚠ for taxes, the period “shall not be interrupted by a guidance or notice urging a refund claim” (Framework Act on National Taxes art. 54(3)); (3) by contrast, a claim does interrupt the period for pension and health insurance; (4) ⭐ the pension lump-sum refund runs for 10 years, the longest of them.
⭐⭐ The clock differs by scheme
| Kind of money | Period | Basis |
|---|---|---|
| ⭐ National pension lump-sum refund | 10 years | National Pension Act art. 115(1) (lump sum amended 26 May 2026) |
| Pension benefit / return of overpayment | 5 years | |
| National tax refund and interest | 5 years | Framework Act on National Taxes art. 54(1) |
| Local tax refund and interest | 5 years | Framework Act on Local Taxes art. 64(1) |
| Health insurance overpayment / benefit | ⚠ 3 years | National Health Insurance Act art. 91(1) |
| Private insurance claim | ⚠ 3 years | Commercial Act art. 662 |
⚠⚠ The three-year health insurance clock is the least known. Article 91(1) puts “the right to a refund of overpaid contributions” and “the right to receive insurance benefits” in the same three-year line. Assume the five-year tax rule and you are late.
⭐⭐ The pension provision carries three periods at once — three years to collect contributions, five years for benefits and overpayment refunds, and ten years for the lump-sum refund. That last figure came in with the 26 May 2026 amendment.
⭐ The starting point is fixed too — taxes run “from the time the right may be exercised” (arts. 54(1) and 64(1)). Not from the date the refund was determined.
⚠⚠⚠ Where “I got a notice” does not help
This is the sharpest contrast in the article. Same category of unclaimed money, opposite rules on stopping the clock.
Framework Act on National Taxes, Article 54(3) The limitation period under paragraph (1) shall not be interrupted by a guidance, notice or the like given by the head of a tax office to the taxpayer to urge a refund claim. <inserted 20 Dec 2016>
Framework Act on Local Taxes, Article 64(3) … shall not be interrupted by a guidance, notice or the like given by the head of a local government urging a local tax refund claim. <inserted 24 Dec 2018>
National Health Insurance Act, Article 91(2) The period under paragraph (1) shall be interrupted by any of the following: 1. notice or demand for contributions 2. a claim for insurance benefits or benefit costs
National Pension Act, Article 115(3) … a payment notice, a demand, and a claim for payment of benefits or for the return of overpayments shall have the effect of interrupting the limitation period.
| Scheme | What stops the clock | ⚠ What does not |
|---|---|---|
| National and local tax refunds | A claim such as administrative litigation (arts. 54(2), 64(2)) | ⚠⚠ A guidance or notice from the authority |
| Health insurance | Notice, demand, a benefit claim | — |
| National pension | Payment notice, demand, a claim for benefits or refund | — |
⚠⚠⚠ Only the tax statutes carry the “shall not be interrupted” sentence — inserted in 2016 for national tax and 2018 for local tax. Those are deliberate insertions.
⭐ Read the other way: getting a message saying you have a refund does not pause anything. If you receive one, claim then. National tax refunds are covered in our refund check guide, and reclaiming missed deductions in our amended return guide.
⭐⭐ Conversely, for health insurance and the national pension the claim itself interrupts the period. Filing something is structurally worth doing.
⭐ Where to look
| Kind of money | Where | Period |
|---|---|---|
| National tax overpayment / refund | Hometax / the government portal | 5 years |
| Local tax overpayment / refund | Wetax / Etax / the government portal | 5 years |
| Health insurance overpayment | National Health Insurance Service | ⚠ 3 years |
| Pension overpayment / lump-sum refund | National Pension Service | 5 years / 10 for the lump sum |
| Unclaimed or dormant insurance money | The industry’s joint search service | ⚠ 3 years — unclaimed insurance guide |
| Credit card points | The card association’s joint enquiry | ⚠ Not found in any statute — card points guide |
⚠ Which items the government portal aggregates is not a matter of legislation. It is operational, so this article does not describe screens or item lists. What the statutes support is how long you have and what stops the clock.
⚠ “Subsidies” are a different question entirely
They appear on the same screen, but a refund and a subsidy are not the same thing.
- A refund is money you already paid coming back, so the limitation provisions above apply.
- ⚠ Subsidies and grants each have their own enabling statute and public notice. Windows, eligibility and amounts differ by programme, and we did not open those sources. So this article states no subsidy amounts or deadlines.
- ⭐ They do share one trait — neither arrives on its own. The tax provisions saying a notice does not stop the clock make that character explicit.
⭐ Is a lapsed period really the end?
Framework Act on National Taxes, Article 54(2) Except as otherwise specially provided in this Act or the tax Acts, the Civil Act shall apply to the limitation period under paragraph (1). In such cases, where a refund is claimed through administrative litigation … it shall be deemed a claim under Article 168(1) of the Civil Act.
- ⭐ Tax law hands the detailed rules to the Civil Act, so the general rules on interruption and suspension come along with them.
- ⭐ Filing administrative litigation counts as a claim and interrupts the period (art. 54(2); local tax art. 64(2)).
- ⚠ We did not open the Civil Act provisions. Whether anything can be done after the period lapses cannot be answered from these texts, so we do not assert it — for a large amount, ask the relevant body first.
- ⚠ National Pension Act Article 115(2) adds a separate suspension rule: “the period shall not run while payment of the entire benefit is suspended.” Interruption and suspension are different concepts.
Questions that keep splitting opinion
What if someone asks for a fee?
⚠⚠ Use each institution’s official channel to search and claim. What the statutes establish is the right and its period, not any intermediary service. A text or call demanding a fee is not part of the official process — if identity misuse worries you, see our identity theft check guide.
What about a deceased family member’s refund?
⚠ We did not open the provisions on claims by heirs. The limitation provisions speak of “the taxpayer’s right” and “the beneficiary’s right” without addressing succession. Ask the institution directly.
Are there more refunds after the May filing season?
⭐ Filing season and refunds do overlap, but what the provision fixes is five years from when the right arises (art. 54(1)). The filing calendar and the limitation period are separate things.
I overpaid health insurance more than three years ago
⚠ Article 91(1)2 sets three years for “the right to a refund of overpaid amounts.” ⭐ But paragraph (2) makes “a claim for benefits” an interrupting event, so whether you claimed anything in the meantime can matter. Post-retirement contribution structure is in our retiree health insurance guide.
Doesn’t the pension just pay out later anyway?
⭐ The right to receive benefits has its own limitation period (art. 115(1), five years). Only the lump-sum refund gets ten. That said, paragraph (2) means the period does not run during a suspension of payment. The scheme overall is in our national pension guide.
With unclaimed money, the question that matters is not where to look but how long you have. And the tax statutes contain a sentence, inserted on purpose, saying a notice does not stop the clock.
Sources
- ⭐⭐⭐ Ministry of Government Legislation, National Law Information Center — statutory text — Framework Act on National Taxes, Article 54 (Limitation on Refunds). Source of “five years from the time the right may be exercised,” paragraph (2) on administrative litigation, and ⚠ paragraph (3), “shall not be interrupted by a guidance or notice” <inserted 20 Dec 2016>.
- ⭐⭐⭐ Ministry of Government Legislation, National Law Information Center — statutory text — National Pension Act, Article 115 (Limitation Periods). Source of three years for collection, five for benefits and overpayments, and ten for the lump-sum refund (<amended 26 May 2026>), paragraph (2) on suspension, and paragraph (3) on interruption by claim.
- ⭐⭐ Ministry of Government Legislation, National Law Information Center — statutory text — National Health Insurance Act, Article 91 (Limitation Periods). Source of the six rights all set at three years and the interrupting events in paragraph (2).
- ⭐⭐ Ministry of Government Legislation, National Law Information Center — statutory text — Framework Act on Local Taxes, Article 64 (Limitation on Refunds). The same structure as national tax, with paragraph (3) inserted on 24 December 2018.
- ⭐ Ministry of Government Legislation, National Law Information Center — statutory text — Commercial Act, Article 662 (Limitation Periods). Basis for the three-year insurance claim.
What we could not confirm
- ⚠⚠ Which items the government portal’s refund and subsidy services aggregate. Operational, not statutory.
- ⚠⚠ Windows, eligibility and amounts for subsidies. Each programme has its own enabling statute and notice; not opened.
- ⚠ Whether anything can be done once a period lapses. The Civil Act provisions were not opened.
- ⚠ Procedure and timing for a claim by an heir. The limitation provisions do not address succession.
- ⚠ How long a refund takes to arrive. No provision states it, so no number is given.
- The basis for private-sector items such as telecom refunds. Apparently contractual terms; not checked.
Written as of August 2026. ⭐ All quotations are the statutory text as published by the National Law Information Center, and what we could not confirm is listed separately above. ⚠ A lapsed limitation period is hard to undo — if anything here rings a bell, check today, and for a large amount contact the institution directly. This article is general information, not legal or tax advice.
