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Calculators and tools
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IR35 Tax Calculator
What a contract pays inside IR35 against outside, on your rate.
Umbrella Company Payslip Calculator
Your take-home through an umbrella: fees, employer costs and tax shown line by line.
Limited Company Tax Calculator
Take-home through your own company: salary, dividends, corporation tax and what is left.
Dividend Tax Calculator
Tax on the dividends you draw this year, at each band.
Corporation Tax Calculator
Corporation tax on your company profit, including marginal relief.
VAT Calculator
Add or strip VAT from any figure.
Flat Rate VAT Calculator
Whether the flat rate scheme leaves you better off, by sector rate.
PAYE & NI Calculator
Income tax and National Insurance on a salary.
Income Tax Calculator
Income tax on any level of earnings, by band.
Salary / Dividend Optimiser
The salary-and-dividend split that leaves the most in your pocket.
Salary Sacrifice Calculator
What sacrificing salary into a pension saves you and your employer.
Day Rate Calculator
The day rate that matches a salary, or the salary a day rate is worth, on live market data.
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- Umbrella companies directoryThe umbrella companies listed on ContractorUK.
- Contractor insuranceProfessional indemnity, public liability and IR35 cover.
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- Contractor pensionsPensions for contractors: company contributions, allowances, advice.
- Business bank accountsBusiness accounts for contractors, compared.
- Liquidation servicesClosing a solvent company through a members' voluntary liquidation.
- Loan chargeThe loan charge: who it catches and what to do.
- JSL reform 2026The joint and several liability rules for umbrella pay from April 2026.
- Autumn Budget 2025 for contractorsWhat the last Budget changed for contractors.
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