§ Calculators · 2026/27
Six calculators, one engine.
Every calculator on this site shares the same year-versioned tax engine. All numbers reconcile across tools. All sources cite HMRC.
- 01
Contractor pay comparisonFlagship
3-way comparison: Outside IR35 (Ltd) vs Inside IR35 (Umbrella) vs Permanent salary. The flagship.
- 02
Director salary optimizer
Find the most tax-efficient director salary for your Ltd: £0, £6,708, £9,100, £12,570 compared.
- 03
Dividend tax calculator
Band-by-band dividend tax for any dividend amount stacking on other income.
- 04
Day rate ↔ salary converter
Convert between contractor day rate and equivalent permanent salary.
- 05
Umbrella take-home calculator
Step-by-step umbrella PAYE breakdown — margin, employer NI, apprenticeship levy, PAYE, net.
- 06
Corporation tax calculator
19% small profits, 25% main rate, marginal relief for £50K–£250K profit.