National Insurance for Self-Employed 2026: Class 4 Rates & Calculator

What Is National Insurance for the Self-Employed?

National Insurance (NI) is a tax on earnings that funds state benefits including the NHS, State Pension, and Jobseeker's Allowance. Employed workers have NI deducted automatically via PAYE. Self-employed workers — including all gig economy workers — calculate and pay NI through their annual Self Assessment tax return.

The system changed significantly in April 2024. There are now only two NI classes relevant to most self-employed workers:

• Class 4: The main self-employed NI contribution, charged as a percentage of profit
• Class 3: Voluntary contributions to fill gaps in your NI record and protect State Pension entitlement

Class 1 applies to employees only. Class 2 was abolished. Understanding which class applies to you is essential before submitting your Self Assessment return.

"Class 2 National Insurance contributions have been abolished from 6 April 2024. Self-employed people with profits above the Lower Profits Limit will still get NI credits towards their State Pension."

— GOV.UK — National Insurance rates

Is Class 2 National Insurance Still Payable in 2026?

Before abolition, self-employed workers paid Class 2 on all profits above the Small Profits Threshold. This was replaced by a system where qualifying NI credits are awarded automatically through Class 4 contributions for workers with profits above £12,570.

If your profit falls below £12,570, you can still protect your State Pension record through voluntary Class 3 contributions.

What Are the Class 4 NI Rates for Self-Employed Workers in 2026?

Class 4 NI is charged on your annual taxable profit — that is, your total income from self-employment after deducting allowable expenses such as mileage, equipment, and phone costs.

The Lower Profits Limit of £12,570 aligns with the Income Tax Personal Allowance. This means both taxes begin at the same threshold, simplifying calculations for gig workers.

The 6% Class 4 rate applies in addition to Income Tax. A worker in the basic rate Income Tax band therefore faces a combined marginal rate of 26% (20% income tax + 6% Class 4 NI) on profits between £12,570 and £50,270.

How Do You Calculate Your Class 4 NI Bill?

The calculation is straightforward once you have your taxable profit figure. Use this three-step method:

1. Calculate taxable profit. Total gig income minus all allowable expenses (mileage, equipment, phone, professional fees)
2. Subtract the Lower Profits Limit. Deduct £12,570 from your taxable profit to find the amount subject to NI
3. Apply the 6% rate. Multiply the remaining profit by 0.06 to find your Class 4 NI bill

National Insurance Bills by Platform: Real Figures for 2026

The figures below use HMRC standard mileage allowance deductions and reflect typical working patterns for each platform.

Use the UKGigTax calculator to enter your exact income and expenses and get a personalised figure. Mileage allowance deductions significantly reduce taxable profit for car-based gig workers.

Does Paying Class 4 NI Count Towards the State Pension?

Yes — but the rules changed when Class 2 was abolished. Here is how it works in 2026:

• Profits above £12,570: You automatically receive a qualifying year towards the State Pension through your Class 4 contributions
• Profits between £6,845 and £12,570: You receive a qualifying year at no cost (NI credit, no payment required)
• Profits below £6,845: No qualifying year is awarded — you must make voluntary Class 3 contributions to protect your record

You need 35 qualifying years to receive the full new State Pension (£221.20 per week in 2026). Each missing year costs approximately £6.33 per week in reduced pension income over a typical retirement.

How Do You Pay National Insurance as a Self-Employed Person?

Class 4 NI is paid as part of your Self Assessment tax return — there is no separate payment or registration process. HMRC calculates your NI liability automatically when you submit your return.

1. Submit your Self Assessment return via GOV.UK or HMRC-approved software by 31 January 2027
2. HMRC calculates your Income Tax and Class 4 NI together and presents a single total bill
3. Pay the combined amount by 31 January 2027 using bank transfer, debit card, or Direct Debit
4. If your bill exceeds £1,000, HMRC may also request payments on account for the following year

You do not register separately for Class 4 NI. Registration for Self Assessment covers your NI obligations automatically.

Should You Make Voluntary National Insurance Contributions in 2026?

Voluntary Class 3 NI contributions cost £17.45 per week (£907.40 per year) in 2026. They are worth considering if:

• Your profit falls below £6,845 and you receive no automatic qualifying year
• You have gaps in your NI record from previous years when you were not working or earning
• You are approaching State Pension age and need to boost your qualifying years
• You took time off for caring responsibilities or illness

Each additional qualifying year adds approximately £6.33 per week to your State Pension. At that rate, a single year's voluntary contribution (£907) pays back within three years of claiming. Check your record on GOV.UK before deciding.

• Voluntary contributions can generally be paid for gaps going back six years
• Extended deadlines may apply for gaps from 2006 to 2018 — check GOV.UK for current rules
• You can pay via Direct Debit, bank transfer, or cheque to HMRC

Frequently Asked Questions