Contractor Pro

ContractorPro is the essential free app for UK contractors. Compare working arrangements, track billable days, and
generate professional invoices — all in one place.

Is It Worth It?
Enter your day rate and instantly see:
• Your total wealth across Outside IR35, Inside IR35, and Umbrella
• Equivalent rates to match your take-home when switching IR35 status
• Side-by-side comparison of any permanent salary vs contractor day rates
• Save and share detailed breakdowns as PDFs

Full Picture
• See the complete financial picture for your household
• Factor in multiple contracts, spouse income, and childcare
• Understand the real impact of your working arrangements

Day Tracker
• Track full and half days worked
• Monthly and yearly summaries
• Actual earnings vs projections

Invoice Generator
• Professional PDF invoices
• Save client profiles
• Auto-populate from tracked days

Tax Calculations
• Income Tax, National Insurance
• Corporation Tax, Dividend Tax
• Scottish Tax Rates supported
• 2025/26 rates

All features are completely free — no subscriptions, no paywalls.

Calculations are estimates only. Consult a qualified accountant for personal advice.