Tax Calculator
Self Assessment Estimate
2024/25 to 2026/27 · Income tax, Class 4 NI & payments on account
Your Details
Tax Year
Income after allowable business expenses
Salary from a job — tax already deducted through PAYE
Rental profit or other income with no tax taken off
Key Deadlines for 2025/26
- · 31 Oct 2026 — paper return deadline
- · 31 Jan 2027 — online return, balancing payment & 1st payment on account
- · 31 Jul 2027 — 2nd payment on account
- · Class 4 NI: 6% (£12,570–£50,270), 2% above
Your Estimate
Enter your self-employment profit to see your tax estimate.
Estimates only, for England, Wales and Northern Ireland. PAYE is estimated as if your job were your only income; your real tax code, student loan, pension or other adjustments can change the figures. If you already make payments on account, they are deducted from the January bill. For your exact liability, speak to an accountant.