UK Freelancer Tax Calculator 2026. MTD Ready.

The problem: most UK freelancers underpay or overpay tax

Making Tax Digital for Income Tax launched April 2026. 2.9 million UK freelancers now need to submit quarterly digital returns, not just one annual Self Assessment. Most have no idea how much to set aside each month, whether they're near the VAT threshold, or which expenses are actually deductible.

• Most freelancers don't know their actual tax liability until the January deadline
• The £100k income trap (60% effective rate) catches higher earners by surprise
• Payment on Account means your first year's bill is 150% of what you expect
• MTD quarterly deadlines are new, missing them means HMRC penalties

What this tool does

• Income Tax calculated across all bands including the 60% personal allowance trap above £100k
• Class 4 National Insurance on trading profits (6% / 2%)
• Class 2 NI flat rate (£3.45/week for 2025/26)
• VAT threshold tracking with registration alerts as you approach £90,000
• MTD quarterly summaries with submission deadlines
• Payment on Account calculations, so you know what you'll owe in July and January
• HMRC expense categorisation for Self Assessment (SA103 boxes)
• Monthly set-aside amounts so you're never caught short

The numbers that matter

Who it's for

This tool is built for UK sole traders and freelancers who do their own Self Assessment. It's also useful for contractors operating outside IR35 who need accurate estimates throughout the year, not just in January when the panic sets in.

If you're preparing for MTD quarterly submissions, this gives you the exact figures HMRC expects, in the format they need, with deadline tracking so nothing slips.