Last reviewed by Toollabz editorial ·
Multiply annual profit by effective income tax and National Insurance percentages you supply. HM Revenue rules, bands, dividends, and payments on account are not auto-modeled; use your accountant for filings.
Quick answer: Self Employed Tax Calculator UK
Applies your own effective income tax and NI percents to annual profit.
Example: £48k profit at 18% tax and 6% NI sketches how much to reserve before January balancing.
Calculations follow the documented formula on this page; rounding and input units can change the last digit-treat outputs as educational estimates unless you reconcile with source systems.
* This is an estimate. Actual amounts may vary slightly based on input assumptions.
HMRC banding, dividends, and payments on account are intentionally manual - this is a planning scratchpad, not a filing engine.
Multiply annual profit by effective income tax and National Insurance percentages you supply. HM Revenue rules, bands, dividends, and payments on account are not auto-modeled; use your accountant for filings.
Inputs on this page: Annual profit (GBP), Effective income tax (%), Effective NI (%). Assumptions stay visible so you can reproduce the figure elsewhere.
Long-form walkthroughs that pair well with this calculator. When you need narrative context beyond the live fields, start here and return to the tool to plug in your own numbers.
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Read guide →People who care about self employed tax calculator uk use Self Employed Tax Calculator UK as a planning sandbox: Blend Class 2/4 and any voluntary contributions into the NI % you type.
Continue in the Finance category hub, the Finance tools collection, or the glossary. Related calculators in this session: Salary After Tax Calculator UK, GST Calculator Australia (10%), Freelance Day Rate Calculator, Invoice Late Fee Calculator (Simple Interest), Dividend Tax Calculator UK, Loan Calculator.
The Formula
Take-home ≈ profit × (1 − incomeTax% − NI%)| This tool | Take-home ≈ profit × (1 − incomeTax% − NI%) |
|---|---|
| Related intent: self employed tax calculator uk | See paired tools for self employed tax calculator uk-each page documents its own core relationship next to the live form. |
| Related intent: sole trader take home calculator uk | See paired tools for sole trader take home calculator uk-each page documents its own core relationship next to the live form. |
Core relationship for Self Employed Tax Calculator UK:
Take-home ≈ profit × (1 − incomeTax% − NI%)
Worked check: £48k profit at 18% tax and 6% NI sketches how much to reserve before January balancing.
Keep the same assumptions and open a neighbor calculator when your question branches: Salary After Tax Calculator UK, GST Calculator Australia (10%), Freelance Day Rate Calculator, Invoice Late Fee Calculator (Simple Interest). Each page documents its own formula beside the fields.
Learning links: Methodology · Editorial policy · Glossary
£48k profit at 18% tax and 6% NI sketches how much to reserve before January balancing.
Re-enter the same numbers in the calculator above to confirm the page math matches the interactive result.
People who care about self employed tax calculator uk use Self Employed Tax Calculator UK as a planning sandbox: Blend Class 2/4 and any voluntary contributions into the NI % you type.
Instant response
Run Self Employed Tax Calculator UK in the browser and read the breakdown beside the form.
Transparent formula
The formula and worked example on this page match what the calculator uses.
Privacy friendly
No account required; inputs stay in your session unless you choose to share them.
Cross-device ready
Layout works on mobile, tablet, and desktop for the same field labels.
Official references for context. Calculator outputs are planning estimates—confirm material decisions with the primary authority or a qualified professional. See our methodology and editorial policy.
Reviewed July 18, 2026 · Content stamp 2026-07-18
Click a question to expand the answer.
No; it is arithmetic on percentages you choose.
Not modeled; adjust cash timing in your spreadsheet.
This flow targets sole trader style profit inputs.
Use the dividend calculator for distribution tax sketches.
Enter the effective % that reflects your banding.
Applies your own effective income tax and NI percents to annual profit.
£48k profit at 18% tax and 6% NI sketches how much to reserve before January balancing.
Blend Class 2/4 and any voluntary contributions into the NI % you type. Move finalized numbers into certified software after accountant review.
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Reviewed by Toollabz Editorial
Finance & tools editor | Last reviewed July 18, 2026
See methodology and editorial policy.