Last updated: 26 July 2026
General information only
Contractor Calculator provides general estimates. Nothing on the site is financial, tax, legal, accounting, employment or investment advice, and no professional or client relationship is created by using a calculator.
Check the assumptions
Every calculator states its formula, assumptions and limitations. Results should be checked against the relevant contract, working pattern, jurisdiction and intended decision. Qualified advice may be appropriate where financial, tax, legal or employment consequences matter.
Availability and changes
Tools may be corrected, updated, replaced or withdrawn. Calculator versions are tested, but uninterrupted availability and suitability for a particular purpose are not guaranteed.
Acceptable use
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