Class 3 National Insurance contributions: cost and break-even

Class 3 contributions are voluntary payments commonly used to fill gaps in a National Insurance record. For 2026/27, the weekly Class 3 rate is £18.40, equivalent to £956.80 for 52 weeks.

Your exact cost can differ

An incomplete year may need fewer than 52 weeks. Different rules can also apply to recent years and older gaps. Use the exact price displayed in your official NI record rather than assuming every year costs the full annual amount.

A simple break-even example

If a £956.80 payment produces the full simplified annual uplift of roughly £358 before tax, the gross break-even is about 2.7 years after State Pension payments begin. At a 20% marginal tax rate, the estimated break-even is closer to 3.3 years.

Deadlines matter

You can normally fill only a limited number of past tax years, and payment deadlines can change. Check the year shown by HMRC and do not rely on an old article or screenshot for your deadline.

Do not pay from the rate alone

A compelling break-even calculation is irrelevant if that gap does not increase your pension. Verify the benefit of the specific year before making an irreversible payment.

Class 3 National Insurance contributions: cost and break-even

Your exact cost can differ

A simple break-even example

Deadlines matter

Do not pay from the rate alone

See the cost, uplift and break-even.