Built for Contractors,
By People Who Care.
Fastcalc was created to demystify the complex world of UK tax and employment legislation. We believe financial tools should be professional, free, and private.
Our Mission
To provide the UK contractor community with the most accurate, up-to-date, and easy-to-use financial tools without the need for sign-ups or sales pitches.
Accuracy First
Every calculator on this site is updated manually for each tax year. We track HMRC announcements, NI changes, and IR35 case law to ensure your results are reliable.
Why we exist
Contracting is one of the most rewarding ways to work, but the financial admin can be a nightmare. From 2025/26 tax bands to fluctuating dividend rates and the constant shadow of IR35, knowing Your 'real' income isn't easy.
Most tools are either hidden behind lead-generation forms or buried in expensive accounting software. Fastcalc is different. We provide premium-grade tools for free, because we know how much a quick, reliable estimate matters when you're negotiating your next day rate.
Ready to crunch some numbers?
Explore our tools and see how they can help your business thrive.