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Self-Employed Tax Calculator

Estimate your taxes as a self-employed sole trader in the UK for 2024/25. Enter your income and expenses to see a detailed breakdown of your tax obligations, based on HMRC’s Self Assessment process—free and easy!

How to Use This Tool

As a sole trader—whether you’re a freelancer, contractor, or small business owner—you must file a Self Assessment tax return (SA100) with HMRC annually if your self-employed income exceeds £1,000. This tool helps you estimate your taxes and prepare for filing, covering all income levels from low earners to high earners.

  • Gross Income: Enter your total earnings (e.g., sales, invoices) before expenses for the tax year (6 April 2024 - 5 April 2025).
  • Expenses: Add allowable business costs (e.g., travel, equipment)—see HMRC’s list.
  • Calculate: Get an instant annual breakdown of profit, tax, and NI, plus a monthly net income estimate to manage your cash flow.
  • File: Use these figures in your SA100 form, due 31 Jan (online) or 31 Oct (paper) 2025.
  • Pay: Tax and NI due 31 Jan 2025, with Payments on Account (50% twice yearly) if over £1,000.
Register or file with HMRC

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