Employment
Estimate take-home pay
See estimated Income Tax, employee National Insurance and net employment pay.
Free UK tax tools
Choose the right calculator for your tax question
Get a transparent estimate without creating an account. Each calculator identifies its applicable period, explains its assumptions and links to the sources behind the calculation.
- No answer gate
- Calculation breakdowns
- Source-linked methods
Popular starting points
Start with the outcome you need
Choose the closest task. You can see what each estimate includes before entering any figures.
Working for yourself
Estimate sole-trader tax
Estimate Income Tax and Class 4 National Insurance on straightforward self-employment profit.
Running a company
Estimate Corporation Tax
Estimate Corporation Tax for a standard company and understand when marginal relief may apply.
Buying property
Estimate Stamp Duty
Estimate residential Stamp Duty Land Tax for a purchase in England or Northern Ireland.
The calculator library
Browse all calculators by situation
These tools provide estimates for defined scenarios. Open a calculator to check its period, scope and exclusions.
People and families
Take-home pay
Income Tax, employee National Insurance and net pay.
Employee National Insurance
Check a category A employee contribution for one regular weekly or monthly payday.
PAYE tax-code explainer
Understand supported code letters, regional prefixes and emergency markers without estimating tax.
Marriage Allowance
Check usual eligibility conditions and estimate a couple’s saving.
Child Benefit tax charge
Estimate Child Benefit and the High Income Child Benefit Charge.
Dividend Tax
Estimate tax on straightforward cash dividends outside an ISA.
Student and Postgraduate Loan
Estimate a PAYE deduction for one payday, including a simultaneous Postgraduate Loan where relevant.
Self-employed and contractors
Sole-trader tax
Income Tax and Class 4 National Insurance on straightforward profit.
CIS deduction
Estimate a contractor’s CIS deduction and subcontractor net payment.
Mileage Allowance
Compare an approved mileage amount with employer payments.
Self Assessment penalty timeline
Check a narrow legacy-regime filing and payment timeline, with uncertain cases routed to HMRC.
Companies and employers
Corporation Tax
Estimate a standard company’s Corporation Tax and marginal relief.
Section 455 company tax
Estimate the company charge on a straightforward outstanding loan or benefit to a participator.
Payroll cost
Estimate salary, employer National Insurance and selected employment costs.
Director salary and National Insurance
Check final full-year category A director National Insurance on a salary you choose.
VAT
Add VAT to a net amount or extract VAT from a gross amount.
Property and gains
Stamp Duty Land Tax
Estimate residential SDLT in England or Northern Ireland.
Capital Gains Tax
Estimate tax on a straightforward ordinary gain.
Use estimates with context
Know what the result can—and cannot—tell you
1
Check the scope
Confirm the period, location, income type and other facts covered before entering figures.
2
Read the breakdown
Use the components and assumptions to understand why the estimate changes.
3
Choose the next step
Read the related guidance or seek help when your facts sit outside the stated scope.
An estimate is not a return or professional advice
Calculator results depend on the figures and answers supplied. They do not submit information to HMRC, replace a formal calculation or account for facts outside the calculator’s stated scope.