Self Employed Tax Calculator

Self-employed tax calculator

2026/27 tax year · Income Tax & National Insurance

Income & expenses

Annual income

Annual outgoings

Tax year

Tax code (optional)

Personal details

Age group

Options

Married (75+) Registered blind No NI Pay Class 2 NI voluntarily

Student loan

Plan 1 (pre Sept 2012) Plan 2 (post Sept 2012)

Your results

2026/27 tax year · Income Tax & National Insurance

Take-home (yearly)

£0

Profit (yearly)

£0

Breakdown

Item	Yearly	Monthly

These calculations are for illustrative purposes only. Consult a qualified accountant or tax professional before making financial decisions.

About this calculator

This free self-employed tax calculator gives you an instant estimate of your Income Tax and National Insurance for the current and recent UK tax years. Enter your income from self-employment, deduct your allowable expenses, and the calculator works out your profit, tax bill, and take-home pay — broken down by year, month, week, or day.

What does it calculate?

The calculator covers the main taxes and deductions that apply to self-employed individuals in the UK:

Income Tax — based on your taxable profit after personal allowance
Class 2 National Insurance — a flat weekly amount if your profits exceed the small profits threshold
Class 4 National Insurance — a percentage of profits between the lower and upper profit limits
Student Loan repayments — Plan 1 or Plan 2, based on your profit

Tax year covered

2023/24, 2024/25, 2025/26 and 2026/27 — select your year from the dropdown.

Personal allowance

Standard allowance is £12,570. This reduces for income over £100,000.

Class 4 NI rate

9% on profits between £12,570 and £50,270, and 2% above that (2026/27).

Self Assessment

The results include a Self Assessment summary showing your estimated payment on account dates.

Who is this for?

This calculator is designed for sole traders and freelancers who are registered as self-employed with HMRC. If you are both employed and self-employed, or operate through a limited company, you may need a different calculator.

If you need to produce payslips or a P60 document, OS Payroll can help. Our online tool lets you create accurate replacement payslips and P60s quickly — with digital delivery or printed and posted UK-wide.

Disclaimer: These calculations are for illustrative purposes only and do not constitute financial advice. Tax rules can change — always consult a qualified accountant or visit HMRC.gov.uk for the latest figures.