ContractorCalculator, the UK’s leading website for contractors and freelancers.

We’ve been online and independent since 1999, when we launched ir35calc.co.uk to help contractors count the cost of the then newly released IR35 tax legislation.

Still owned by founder and former IT contractor Dave Chaplin, the site has grown dramatically since then to become the expert guide to contracting. Dave is still actively involved in its management, supported by a dedicated team of contractors and freelancers

Our monthly audience of regular readers is made up of contractors, freelancers, interims and consultants from the IT, telecoms, engineering, oil, gas and energy, business, marketing and medical sectors. They keep coming back as we offer:

A comprehensive range of essential online financial, salary and tax calculators

A high quality news service from a professional editorial team

Expert commentary and analysis from industry and sector leaders

More than 1,000 online articles and contractor guides suitable for beginners and veterans

Access to leading contractor services.

As a result of this comprehensive resource for those new to contracting and experienced old-hands, we’re proud to call ourselves The Expert Guide to Contracting, and have even published the definitive guide to contracting – The Contractors’ Handbook: the expert guide for UK contractors and freelancers.