Find the right tool for the task.

Add VAT, remove VAT or find the VAT portion of an amount.

Check the standard rolling 12-month and forward 30-day VAT registration tests using the current £90,000 threshold.

Estimate a Flat Rate Scheme amount, run the limited-cost test and compare standard VAT accounting.

Estimate Corporation Tax, Marginal Relief and the effective tax rate for a UK company.

Compare estimated take-home from salary and dividends for a UK company director, including tax, National Insurance and Corporation Tax.

Estimate UK dividend tax for 2026/27 or 2025/26, including the £500 Dividend Allowance, Personal Allowance and basic, higher and additional rates.

Free UK self-employed tax calculator for 2026/27 and 2025/26. Estimate Income Tax, National Insurance and payments on account. No sign-up needed.

Estimate a monthly amount to put aside for the January Self Assessment payment linked to a selected tax year.

Check when a UK sole trader or landlord may need Making Tax Digital for Income Tax using the £50,000, £30,000 and £20,000 thresholds.

Compare margin, markup and discounts, or calculate the selling price required to reach a target.

Find the contribution per unit and the sales needed to cover fixed costs.

Estimate take-home pay using an optional tax code, workplace pension contributions and student-loan deductions.

Estimate salary, employer National Insurance and workplace pension costs for one employee.

Estimate Statutory Sick Pay (SSP) for 2026/27 using average weekly earnings and qualifying sick days. Free UK calculator with a clear breakdown.

Check common Employment Allowance exclusions and estimate how much qualifying employer Class 1 National Insurance it may cover.

Estimate the approved mileage amount for business journeys in your own vehicle.

Estimate statutory or contractual interest on an overdue business invoice.

Calculate CIS deductions, VAT and the net payment due to a subcontractor.