National Insurance · 2026/27 tax year
Class 2 National Insurance calculator UK 2026/27
Check whether you owe Class 2 NI as a self employed sole trader, and what voluntary contributions cost if you want to protect your State Pension.
Voluntary contributions
Voluntary cost: £179 per year (£3.45 per week).
Understanding your results
Class 2 sits at the intersection of cost and long-term entitlement. When mandatory Class 2 ended for many earners above the small-profits threshold, the policy trade-off was simpler cash flow today against the risk that people would forget voluntary top-ups when profits dip. If your calculator output says you are below the threshold, treat voluntary Class 2 as a cheap option to buy a qualifying year — but only after checking your NI record online for gaps you actually need to fill.
Qualifying years are cumulative. Ten years unlock some State Pension; thirty-five unlock the full new State Pension for many people. One voluntary Class 2 year is rarely decisive alone, but several missed low-profit years in your twenties and thirties compound. Use this tool alongside HMRC’s record viewer, not instead of it.
Voluntary Class 3 exists for some situations where Class 2 is unavailable; it is more expensive per year. If you hover near the threshold, small movements in reported profit can change which route is cheapest. Keep your books accurate early — December surprises are harder to fix than April ones.
Benefits beyond the State Pension — such as contribution-based Employment and Support Allowance — historically leaned on NI records. Policy evolves; the safest default is to maintain a full record unless a regulated adviser tells you a deliberate gap is appropriate for your plan.
If you are also employed, employment may already give you qualifying years through Class 1. Duplicating voluntary Class 2 without checking the record wastes money. The calculator tells you about self-employment in isolation; human review merges both streams.
Disclaimer: This is a guidance estimate based on the 2026/27 tax year. It is not personal tax advice — consult an accountant or HMRC for your specific circumstances.
About this calculator
Class 2 National Insurance is a flat-rate weekly contribution that self employed people used to pay if their profits were above the Small Profits Threshold (£6,725). From the 2024/25 tax year onwards, mandatory Class 2 NI was abolished for most sole traders — you still get the same State Pension and benefit credits without paying it.
However, Class 2 has not gone away entirely. If your profits are below £6,725 you can still pay it voluntarily, currently at £3.45 per week (£179.40 a year). It is one of the cheapest ways to fill in a gap in your National Insurance record and protect your entitlement to the new State Pension and certain benefits.
This Class 2 NI calculator tells you whether you fall above the Small Profits Threshold (so contributions are credited automatically), below it (where voluntary contributions may be worth considering), or whether you would benefit from making voluntary payments anyway.
If you are not sure how many qualifying years you already have, you can check your National Insurance record on GOV.UK. As a rough guide, you need 10 qualifying years for any State Pension and 35 for the full new State Pension.