Retirement & Withdrawal6 分で読めます

The Structure of Korea's National Pension and Its Replacement Rate

The National Pension deducted from your salary every month—will you really get it back later? Let's look at the structure of how much you pay and how much you receive, exactly as the facts are.

How Much You Pay — The Contribution Rate

The National Pension contribution rate is the ratio applied to your "standard monthly income." It was long kept at 9%, but with the 2025 amendment to the National Pension Act, increases begin in 2026.

From 2026, it rises by 0.5 percentage points each year, reaching 13% in 2033. Because workplace subscribers split this contribution 50/50 with their employer, the individual burden rises from 4.5% to 4.75%, and ultimately to 6.5%.

Why raise it? Because the structure of receiving more than you pay in raised concerns about fund depletion. In other words, the system was adjusted toward "pay more, receive more."

Contribution rate 9%→13% (0.5pp per year through 2033) source: Ministry of Health and Welfare press release (2025-03, pension-reform bill passage), National Pension Service, Toss Bank summary.

How Much You Receive — The Replacement Rate (Nominal vs. Real)

The income replacement rate is "the ratio of the pension amount to average income during the enrollment period." For example, a 40% replacement rate means someone who earned an average of 1 million KRW per month while working receives 400,000 KRW per month in retirement.

But there's a trap here. This figure is a nominal replacement rate premised on "40 full years of enrollment." In reality, enrollment periods are much shorter. As of 2020, the average enrollment period for new recipients was about 18.7 years, in which case the real replacement rate falls to around 22%.

The 2026 reform raised the nominal replacement rate to 43%, but you should know that the ratio you actually pocket falls below this the shorter your enrollment period.

The nominal replacement rate is written as anywhere from 40% (statutory long-term target) to 41.5% (current, pre-reform) depending on the source, and the 2026 reform raised it to 43% (Ministry of Health and Welfare). Real replacement rate about 22.4% (2020 average enrollment 18.7 years) source: Kyunghyang Shinmun 'The Replacement-Rate Debate'. On the OECD 2021 basis, Korea's mandatory public-pension replacement rate is 31.2%, a different comparison basis.

When You Start Receiving — The Rising Receipt-Start Age

You must be enrolled for at least 10 years to receive the old-age pension, and the age at which you start receiving it differs by birth year. In the past you received it from 60, but it has been pushed back gradually due to aging.

The receipt-start age by birth year is roughly as follows: age 61 for those born 1953-56, age 62 for 1957-60, age 63 for 1961-64, age 64 for 1965-68, and age 65 for those born 1969 or later. Today's teens and twenty-somethings fall here and will receive it from age 65.

There is also an early old-age pension for receiving it sooner, but bringing it forward by up to 5 years reduces it—for example, to 70% of the original amount. Conversely, deferring it increases the amount.

Receipt-start age by birth year (age 65 for those born 1969 or later) and early-receipt reduction source: National Pension Service, Toss Bank. The 2026 reform did not include a further age increase.

Will the Fund Run Dry? — Just the Facts

The most common worry about the National Pension is "won't I be unable to receive it once the fund runs dry?" Summarizing the facts neutrally:

The 2023 Fifth Financial Projection forecast that, if the current system is maintained, spending would exceed income from 2041, and the reserve fund would be depleted around 2055. This is due to the demographic structure—the low birth rate and aging mean fewer people paying in and more people receiving.

Reflecting the 2025 reform (contribution-rate increase and replacement-rate adjustment), the depletion point is estimated to be pushed back by roughly 5-8 years, and longer still if the fund's investment return improves. The amended law also included language stipulating the state's "payment guarantee."

However, remember that these figures are "projections" that change with demographic and economic assumptions—not predictions that assert the future as certain.

Depletion in 2055 (2023 Fifth Financial Projection) and the 5-8-year extension outlook when reflecting the reform source: Ministry of Health and Welfare / Newsis financial-projection reports. The depletion point is a projection that varies with assumptions.

よくある質問

Q. I'm in my 20s now—can I really receive the National Pension?

This article does not assert the future as certain, but stating just the facts: the National Pension is not a system that stacks money in an individual account but a social insurance that pays today's generation with money paid by the current generation, and the amended law stipulates the state's payment guarantee. Because of fund-depletion concerns in the financial projection, a reform raising the contribution rate is under way. It's accurate to understand it as an area where the system keeps being adjusted, not a fixed future.

Q. Is the National Pension alone enough for retirement?

Generally it's considered insufficient. Even with a nominal replacement rate in the 40% range, if the enrollment period is short, the real replacement rate falls to around 20%. That's why it's commonly recommended to treat the National Pension as the "foundation" of retirement income and supplement the rest with retirement pensions, pension savings, personal savings, and so on in a multi-layer structure. This article explains the structure, not recommends a specific product.