Voluntary NI contributions — the best deal in UK finance, checked honestly

Each qualifying year bought adds 1/35th of the full new State Pension — about £358 a year, for life, inflation-protected — for a one-off payment of roughly £900. This calculator shows the after-tax breakeven. Your figures never leave your browser.

Why this is usually exceptional value

The full new State Pension needs 35 effective qualifying years of National Insurance. Finish short and each missing year permanently costs you 1/35th of the pension — and each year bought back permanently restores it. Pay roughly £900 once, receive ~£358 a year (rising with the pension) for the rest of your life: even taxed at basic rate, the payback is around three years. Almost nothing legal beats it.

The checks that come first

Buying a year does nothing if you'd reach 35 effective years anyway through future work — a 45-year-old with 25 years and 20 working years ahead needs no top-up. And some records are complicated by pre-2016 contracting-out, where an extra year genuinely adds nothing. So: check your State Pension forecast and NI record on gov.uk, and for anything unclear ring the Future Pension Centre before paying. Normally you can go back six tax years.

The full Hundred Summers plan models your qualifying years, future working years and gap-filling inside your whole retirement picture — and its deferral calculator covers the other State Pension decision.