Key takeaway — Retirement spending is better estimated by adjusting today's expenses category by category than by applying one percentage to current income.
Reviewed August 20, 2026. Tax, pension, mortgage, and guarantee rules can change; verify the current official rules before applying, signing, or transferring money.
1. Begin with twelve months of real spending
Use bank and card records to divide a full year into housing, food, transport, insurance, healthcare, education, leisure, and family support. A one- or two-month snapshot can miss taxes, annual insurance, travel, or other irregular expenses.
2. Identify costs likely to fall
Commuting, work meals, job-related clothing, and education spending after children become independent may decline. Record when each reduction is actually expected rather than assuming everything drops on retirement day.
3. Identify costs that may rise
Healthcare, hobbies, travel, home repairs, and potential care needs can grow. Long retirement periods also make inflation an important part of the estimate.
4. The gap between spending and reliable income is the withdrawal need
Subtract National Pension, retirement pensions, and other dependable income from the monthly spending estimate. NPS payment statistics can provide context, but the household's own expected benefit is the relevant planning number.
Official sources
- National Pension Service — Pension payment statistics
- National Pension Service — Old-age pension guidance
Money & Why note: This is general educational information, not an individualized buy/sell instruction, guaranteed return, or legal, tax, or investment advice. Apply the framework to your own income, debt, taxes, family situation, and time horizon.