Tax Calculator
Self Assessment Estimate
2025/26 tax year · Income tax & Class 4 NI
Your Details
Income after allowable business expenses
Employment income, rental, etc. (affects tax bands)
Key Deadlines
- · 31 Jan — online return & tax payment
- · 31 Oct — paper return deadline
- · 31 Jul — second 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. Payments on account apply if your bill exceeds £1,000 and less than 80% was collected at source. For your exact liability, speak to an accountant.