§ Contractor calculator · £650/day
£650/day contractor
take-home calculator.
At £650/day (5 days × 46 weeks = annual gross £149,500), here's what each contracting structure actually pays in the 2026/27 tax year.
§ Quick answer
At £650/day, the most tax-efficient structure is permanent salary at £90,393 net annual — an effective tax rate of 39.54%.
- Outside IR35 (Ltd)
- £88,585/yr
- Inside IR35 (Umbrella)
- £79,576/yr
- Permanent salary
- £90,393/yr
Specialist senior rate. Cyber-security specialists, senior data scientists, niche legal/financial.
§ Try other inputs
Loading calculator…
§ Try other day rates