Retirement Income Gap Calculator (public, workplace & personal pensions)

How it works

Retirement income is often described in three layers: a public pension, a workplace (occupational or retirement) pension and personal pensions or savings. Total income = the three layers + other steady income. Shortfall = target spending − total income. The lump sum is the present value of paying that shortfall every month for the chosen years: gap × (1 − (1 + i)⁻ⁿ) ÷ i, with i the monthly rate equal to the yearly return above inflation and n the number of months. Enter everything in today’s money, so a return above inflation keeps the figures in today’s buying power.

⚠ Estimates for information only — not financial advice.

FAQ

Where do I find my expected pension?

Public pension services publish personal estimates online (in Korea, the National Pension Service “내 연금 알아보기”; civil servants use the Government Employees Pension Service). Workplace and personal pension providers show projected payments on their statements.

What return above inflation is realistic?

Deposits often earn about the inflation rate, so 0–1% is a cautious choice. A higher figure assumes riskier investments; past returns do not guarantee future returns.

Checked 11 Nov 2026. Present value of a level monthly annuity (ordinary annuity), standard time-value-of-money formula; three-pillar description of pension systems as used by the OECD (“Pensions at a Glance”). Pension amounts are your own estimates.