Contractor Calculator UK: £500 a day pays more through an umbrella, on these rules
The contractor calculator runs one contract two ways, through an umbrella company on PAYE and through your own limited company, and compares the take home pay of each. At the starting figures, £500 a day for 220 days, the umbrella route pays £72,733 a year and the limited route pays £69,016, so the umbrella wins by £3,717 under the simplified rules this calculator applies.
Whether the choice exists at all depends on IR35. Inside IR35 the limited route closes and PAYE applies; outside it, both columns stand. The sections below run the IR35 gate, the umbrella maths, the limited company maths and the worked example in the order the calculator applies them.
Read the corporation tax line before the result
This calculator charges corporation tax at a flat 19% on profits up to £50,000 and a flat 25% above that figure, with no taper between the two. Real corporation tax relieves that jump gradually, so the limited column here is a cautious floor at high profits rather than a final verdict.