Your Self-Employment Details
Your Tax Breakdown
Figures are estimates based on HMRC rates. They do not account for other income sources, marriage allowance, or benefits in kind.
How Self-Employed Tax Works
How is UK Self-Employed Tax Calculated in 2026/27?
If you work for yourself as a sole trader or freelancer, you pay tax on your net trading profit (turnover minus allowable business expenses). Your total tax liability consists of Income Tax (20%, 40%, 45%) and Class 4 National Insurance (6% and 2%).
What are the Class 4 and Class 2 National Insurance Rules in 2026/27?
Following recent reforms, compulsory Class 2 National Insurance has been abolished. Sole traders with trading profits above the Small Profits Threshold automatically earn qualifying National Insurance credits for their State Pension at zero cost.
| National Insurance Tier | Profit Band (2026/27) | Statutory Rate | State Pension & Benefit Treatment |
|---|---|---|---|
| Class 2 (Compulsory) | All profit levels | £0.00 (Abolished) | Automatic free National Insurance credits if profit > £6,725 |
| Class 4 — Main Rate | £12,570 – £50,270 | 6% | Profit-based contribution paid via Self Assessment |
| Class 4 — Higher Rate | Over £50,270 | 2% | Applied to all taxable profits exceeding £50,270 |
Source: GOV.UK — Self-employed National Insurance rates
What are the UK Self-Employed Income Tax Bands for 2026/27?
Sole traders benefit from the standard UK Personal Allowance of £12,570. Profit above this threshold is taxed progressively across basic, higher, and additional rate tiers.
| Income Tax Band | Taxable Trading Profit | Statutory Rate |
|---|---|---|
| Personal Allowance | Up to £12,570 | 0% |
| Basic Rate | £12,571 – £50,270 | 20% |
| Higher Rate | £50,271 – £125,140 | 40% |
| Additional Rate | Over £125,140 | 45% |
How Does HMRC Payment on Account Work for Sole Traders?
Payment on Account is HMRC's advance payment mechanism for self-employed individuals with tax bills exceeding £1,000:
- 31 January (Deadline 1): Pay your balancing tax bill for the previous tax year PLUS your 1st Payment on Account (50% of the bill) for the current year.
- 31 July (Deadline 2): Pay your 2nd Payment on Account (the remaining 50% of the previous bill).
Step-by-Step Self-Employed Tax Calculations (Worked Examples)
The mathematical breakdowns below show exact calculations for sole traders across £30k, £60k, and £100k trading profit tiers.
Freelancer — £30,000 Trading Profit
Demonstrates the 6% Class 4 rate and abolished Class 2.
Consultant — £60,000 Trading Profit
Demonstrates the 40% higher rate & 2% Class 4 tier.
Sole Trader — £100,000 Trading Profit
Demonstrates upper tier tax and NI liabilities.
Frequently Asked Questions
Self-employed tax is calculated on trading profits (turnover minus allowable expenses). Sole traders pay Income Tax (20%, 40%, 45%) plus Class 4 National Insurance (6% between £12,570 and £50,270, and 2% above £50,270).
The statutory Class 4 National Insurance rate for 2026/27 is 6% on trading profits between £12,570 and £50,270, and 2% on profits exceeding £50,270, payable via Self Assessment.
No. Compulsory Class 2 National Insurance has been abolished. Sole traders with profits above £6,725/£7,105 receive free National Insurance credits towards their State Pension with £0 to pay.
If your Self Assessment tax bill exceeds £1,000, HMRC requires two advance payments (50% on 31 January, 50% on 31 July) towards the next year's tax liability, creating the 'July Shock' cash flow event.
Yes. Personal pension contributions reduce your taxable profits for Income Tax, providing basic, higher (40%), or additional (45%) rate tax relief through your annual Self Assessment return.
The statutory online Self Assessment filing and payment deadline is 31 January following the end of the tax year. Late filing incurs an immediate £100 HMRC penalty.