All calculator outputs are estimates based on published HMRC rates and a simplified model. They are for planning and comparison purposes only and are not tax, accounting or financial advice.
Updated 2026/27 · SoleTraderTaxCalculator.co.uk · Editorial standards · Methodology
Results are produced by applying HMRC-published rates to user-provided inputs. The model covers standard scenarios and does not reflect every individual tax complexity. You should not use these estimates as the basis for a formal tax return, compliance decision, legal arrangement or professional advice.
For Self Assessment filing, tax planning or any decision that has significant financial consequences, consult a qualified accountant or use HMRC's official tools.
Rates and thresholds are reviewed and updated at each Budget and at the start of each new tax year. We make reasonable efforts to ensure accuracy but cannot guarantee that all information is current at all times. Source links to GOV.UK are provided so you can verify the current position independently.
The sole trader tax calculator turns this guidance into a concrete monthly take-home and tax reserve estimate, based on 2026/27 HMRC rates. Enter taxable profit — not turnover.
Self Assessment checklist, expense tracker and payments on account calendar — all in one practical PDF. Updated for 2026/27.
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