contractorcalculator.co.uk
Online tax calculators, guides and news for UK contractors, freelancers and consultants
Highlights
- New on EvolcAdded 2026-11-02
About contractorcalculator.co.uk
ContractorCalculator publishes financial, tax and salary calculators, news and guides for contractors in the UK. Its tools include contractor, IR35, umbrella, mortgage, pension and PAYE/NI calculators, and the site carries more than 1,000 articles and contractor guides. It also publishes The Contractors' Handbook.
The readership is contractors, freelancers, interims and consultants from IT, telecoms, engineering, oil, gas and energy, business, marketing and medical sectors, with the site stating over 100,000 visitors per month. Revenue comes from online marketing solutions offered to advertisers and from contractor insurance products listed on the site.
The site has been online since 1999, when it launched ir35calc.co.uk. It is owned by founder Dave Chaplin, a former IT contractor, and is operated by Byte-Vision Ltd in Norwich, United Kingdom.
Product: Online financial and tax calculators, news and contractor guides, plus marketing solutions and contractor insurance listings.
Jobs at contractorcalculator.co.uk
Leadership
- Dave Chaplin · founder and former IT contractorSource: company website
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Website technologies
Tools and platforms detected on this company’s website, grouped by purpose. Dates record when Evolc observed them.
Analytics
- Google Analytics 4High confidence
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Detection evidence
- Website resourcedeclared script/iframe or software asset
- Google Universal AnalyticsMedium confidence
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Detection evidence
- Integration code on pageinitialization/configuration expression
- Integration code on pageinitialization/configuration expression
- Integration code on pageinitialization/configuration expression
Backend
- ASP.NETMedium confidence
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Detection evidence
- Page markupsoftware structure signature
- Cookie namedistinctive cookie name
- Cookie namedistinctive cookie name
Forms
- Google reCAPTCHAHigh confidence
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Detection evidence
- Website resourcedeclared script/iframe or software asset
Marketing & advertising
- Google AdsHigh confidence
- First detected
- Last detected
- Last checked
Detection evidence
- Website resourcedeclared script/iframe or software asset
Website detection does not establish a paid subscription or company-wide use. Tools loaded after consent or sign-in may be missed. “No longer observed” does not prove the company stopped using a tool.