Claiming Korea's national pension one year early cuts the monthly benefit by 6%. You can pull it forward up to five years, so the maximum reduction is 30% — a payout rate of 70%. The National Pension Service lists the early payout rates as 70, 76, 82, 88 and 94% depending on when you claim. On a monthly basis that is 0.5% per month.
The reduction locks in the moment you claim and cannot be undone. That turns the decision into a question of timing rather than size. Someone entitled to 1 million won a month who claims five years early drops to 700,000 won — but collects 42 million won during those five years. The break-even is how long the 300,000 won monthly gap takes to erase that head start.
How many years early buys what rate
The normal starting age depends on birth year: 63 for those born 1961–64, 64 for 1965–68, and 65 for anyone born 1969 or later. Early claiming is allowed up to five years ahead of that age, with a minimum of ten years of contributions.
| Years early | Reduction | Payout rate | Monthly on a 1M won benefit (KRW) | Monthly gap (KRW) |
|---|---|---|---|---|
| 1 | 6% | 94% | 940,000 | -60,000 |
| 2 | 12% | 88% | 880,000 | -120,000 |
| 3 | 18% | 82% | 820,000 | -180,000 |
| 4 | 24% | 76% | 760,000 | -240,000 |
| 5 | 30% | 70% | 700,000 | -300,000 |
One condition limits the option. Early benefits assume you are not engaged in paid work. If your monthly average income exceeds the A-value — the three-year average income of all subscribers, set at 3,193,511 won for 2026 — you cannot claim early, and payments already running are suspended. Anyone planning to work again after retirement has to rerun the timing.
At what age does early claiming turn into a loss?
The structure is simple: compare the head start collected before the normal starting age against the monthly gap that opens afterward. The table below is calculated for a 1 million won benefit and a 1969 birth year (normal start at 65).
| Years early | Head start by age 65 (10k KRW) | Monthly gap (10k KRW) | Time to catch up | Break-even age |
|---|---|---|---|---|
| 1 (start at 64) | 1,128 | 6 | 15 yrs 8 mo | 80 yrs 8 mo |
| 2 (start at 63) | 2,112 | 12 | 14 yrs 8 mo | 79 yrs 8 mo |
| 3 (start at 62) | 2,952 | 18 | 13 yrs 8 mo | 78 yrs 8 mo |
| 4 (start at 61) | 3,648 | 24 | 12 yrs 8 mo | 77 yrs 8 mo |
| 5 (start at 60) | 4,200 | 30 | 11 yrs 8 mo | 76 yrs 8 mo |
A pattern falls out. The more years you pull forward, the earlier the break-even arrives — 76 years 8 months at five years early, 80 years 8 months at one year early. A deeper cut also means a larger head start, so the crossover shifts exactly one year for each year claimed early.
Read the other way, claiming just one year early is the least sensitive to longevity risk: you would have to live past 80 years 8 months before it becomes a loss. Someone who claimed five years early falls behind on a cumulative basis after only 76 years 8 months.
Early claiming is not a question of how much you give up. It is a question of how long you live — and the reduction is fixed the moment you claim.
Deferral always breaks even after the same interval
The reverse option adds 7.2% per year deferred (0.6% per month), capped at five years for a 36% bonus and a 136% payout rate.
| Years deferred | Payout rate | Monthly (10k KRW) | Forgone total (10k KRW) | Monthly gap (10k KRW) | Break-even age |
|---|---|---|---|---|---|
| 1 (start at 66) | 107.2% | 107.2 | 1,200 | 7.2 | 79 yrs 11 mo |
| 2 (start at 67) | 114.4% | 114.4 | 2,400 | 14.4 | 80 yrs 11 mo |
| 3 (start at 68) | 121.6% | 121.6 | 3,600 | 21.6 | 81 yrs 11 mo |
| 5 (start at 70) | 136.0% | 136.0 | 6,000 | 36.0 | 83 yrs 11 mo |
Here the catch-up period is fixed at 13 years and 11 months regardless of how long you defer, because both the forgone amount and the later gap scale in direct proportion. The break-even age therefore slides back by exactly as much as you postpone the start.
All three tables use nominal amounts. Benefits are indexed to consumer price inflation each year, and money received earlier carries a time value. Indexing alone enlarges the later gap and pulls the break-even earlier; treating the head start as invested pushes it later. The two effects run in opposite directions, so the figures shift by one to three years depending on which assumption you weight. The tables also ignore income tax and health insurance premiums, which move together with total pension income.
The no-cut income threshold rose to 5.19 million won
A separate rule trims benefits for those who keep working after the normal start date, applying for the first five years. That threshold was relaxed on 17 June 2026.
Previously any monthly average income above the A-value triggered a reduction. Now the cut only begins above the A-value plus 2 million won. According to the Ministry of Health and Welfare, the 2026 threshold rose from 3.19 million won to 5,193,511 won, and the two lowest of the five reduction brackets were abolished. The reduction is capped at half the benefit.
Monthly average income here is not gross salary. Employment income is gross pay minus the earned income deduction; business income is revenue minus necessary expenses. The two are summed and divided by months worked. Kyunghyang Shinmun reported that the change removes a large share of those previously affected, and Korea Policy Briefing put the cumulative effect through May 2026 at roughly 90,000 recipients receiving 19.5 billion won more, or about 50,000 won a month each.
This matters for the early-claiming decision. A wider no-cut band means less reason to rush. Many people claim early to bridge the income gap right after retirement; if re-employment income stays below the 5.19 million won line, waiting for the normal start date now compares better than it used to.
What to watch
- Your normal starting age by birth year — 63 for 1961–64, 64 for 1965–68, 65 from 1969 onward
- Whether your monthly average income at the planned claim date exceeds the A-value (3,193,511 won in 2026) — above it, early claiming is blocked outright
- The A-value announced each January, since the no-cut threshold (A-value plus 2 million won) moves with it
- Projected employment and business income for the five years after benefits start — that is the window the reduction applies to
- Health insurance dependent status and pension income tax brackets as total pension income rises
- If you have already filed for early benefits, the window to cancel — the reduction cannot be reversed once payments begin
Sources
- National Pension Service — Early old-age pension eligibility and payout rates
- Ministry of Health and Welfare — Revised old-age pension reduction rules take effect
- Korea Policy Briefing — Full benefits below 5.19 million won in monthly income
- Kyunghyang Shinmun — Reduction threshold eased from 3.19 to 5.19 million won
- Korea Council for Investor Education — Claiming early versus deferring