SoleTraderTaxCalculator.co.uk publishes free, editorially independent content on self-employment tax, Self Assessment and related topics. This page explains how that content is produced and kept accurate.
Updated 2026/27 · SoleTraderTaxCalculator.co.uk · Editorial standards · Methodology
Content on this site is written by the editorial team at SoleTraderTaxCalculator.co.uk. We aim to produce clear, accurate explanations of UK sole trader tax rules for people who are self-employed or considering self-employment.
We do not accept sponsored content, paid placement or payment to include or favour any financial product, service or third party in our guides or calculators.
All tax rates, thresholds and allowances used in the calculator and guides are sourced from HMRC and GOV.UK. We review and update these following each UK Budget and at the start of each new tax year.
Where rates change mid-year (which is rare), we aim to update affected pages within five working days of the change being confirmed in official guidance.
This site is a tax estimation tool and educational resource. It is not a regulated financial adviser, accountant or tax return service. Estimates produced by the calculator are illustrative and do not constitute formal tax calculations or Self Assessment returns.
Where professional advice is appropriate — for example, for complex affairs, compliance decisions or significant financial planning — we say so explicitly.
If you believe a rate, threshold or piece of information on this site is incorrect, contact us at editorial@soletradertaxcalculator.co.uk. Please include a link to the relevant HMRC or GOV.UK source. We investigate all credible corrections promptly.
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.
Get the pack — £3.99 →