Korea National Pension Estimated Benefit Calculator

Enter your years of National Pension enrollment and your average income during that period to estimate your monthly old-age pension benefit using the basic pension formula.

The 2025 A-value is about ₩3,090,000 and is revised every year

Enter your enrollment years and average income to estimate your pension benefit.

About Korea's National Pension estimated benefit

Korea's National Pension (국민연금) is the country's mandatory public pension system, paying a monthly retirement benefit based on how long you contributed and how much you earned relative to other contributors during that time, following a formula set by the National Pension Act. This tool estimates your expected monthly and annual old-age pension using that official formula and your contribution history.

How the pension amount is calculated

The formula is: basic pension amount = payment rate × (A value + B value) × [1 + 0.05 × (contribution years − 20)], where A is the average monthly income of all National Pension contributors nationwide (a value that changes yearly), B is your own average monthly taxable income during your contribution period, and the payment rate reflects the standard benefit rate set by law — this design means your benefit is influenced by both your own earnings history and the broader national average income, which is a form of income redistribution built into the system. If you've contributed for under 10 years, you're generally not eligible for a monthly pension and instead qualify for a lump-sum refund, which this calculator flags rather than estimating a monthly figure.

Frequently asked questions

Why does the national average (A value) affect my personal pension amount?
Including the national average income (A value) alongside your own income (B value) is a deliberate redistributive design — it means lower earners get a proportionally larger boost relative to their own contributions than higher earners, since the formula pulls everyone's benefit somewhat toward the national average rather than being purely proportional to individual earnings.
What happens if I contributed for less than 10 years?
Korean law generally requires at least 10 years of contributions to qualify for a regular monthly old-age pension; if you fall short of that, you typically receive a lump-sum refund of your contributions (plus interest) instead of an ongoing monthly benefit, which is why this calculator directs you to that alternative rather than showing a monthly amount in that case.
Does contributing more years always increase my pension proportionally?
Yes, generally — the formula's bracketed term [1 + 0.05 × (years − 20)] shows the payment rate scaling up specifically with years contributed beyond the 20-year reference point (and down for fewer years), so consistently contributing longer meaningfully increases your eventual monthly benefit.