I Built a Free UK Freelancer Tax Calculator — No Sign-ups, No Ads

If you are a UK freelancer, tax season does not have to be stressful. I built a free, open-source tax calculator that runs entirely in your browser — no sign-ups, no data collection, just accurate numbers. What It Does The UK Freelancer Tax Calculator takes your annual income and expenses, then breaks down: Personal Allowance (currently 12,570 pounds) Income Tax across all bands (Basic 20%, Higher 40%, Additional 45%) National Insurance (Class 2 and Class 4) Total tax liability Your actual take-home pay All calculations use the official HMRC 2025/26 tax rates. Why I Built It Most tax calculators online either require you to create an account, bombard you with ads, or give you oversimplified estimates. I wanted something that a freelancer could open, punch in two numbers, and get a full breakdown in seconds. Try It The calculator is live at uktaxcalc.tblsoftwares.com — completely free to use. It is a single-page app with zero dependencies. All calculations happen client-side, so your fi