Personal, property and business estimates
UK Tax Calculators
Estimate Income Tax, Self Assessment payments, dividends, property profits, Capital Gains Tax, Corporation Tax, VAT, payroll deductions and selected HMRC penalties.
A calculator provides an initial figure from the information entered. It cannot establish whether the inputs are complete, which reliefs apply, whether another filing is connected or how HMRC will treat disputed facts.
Use estimates as a starting point
Choose the calculator by the figure you need—not by your job title
A landlord may need a rental-profit estimate and a separate gain calculation. A director may need personal dividend tax, company Corporation Tax and payroll figures. Keeping those calculations separate makes the result easier to check.
- Personal income
- Estimate tax on salary, self-employment, dividends or the Self Assessment balance.
- Property
- Estimate rental profit, finance-cost relief, a disposal gain or non-resident landlord tax.
- Company
- Estimate Corporation Tax, VAT, payroll deductions or salary and dividend outcomes.
- HMRC deadline
- Estimate a selected late-filing penalty before the actual notice and dates are reviewed.
Calculator directory
Tax calculators for individuals, landlords and businesses
Each link opens a dedicated tool. Check the tax year and assumptions shown on that calculator before using the result.
Income and annual filings
Personal tax calculators
Income Tax Calculator
Estimate tax across the relevant income bands after the assumptions entered.
Self Assessment Tax Calculator
Estimate the amount arising from income reported through Self Assessment.
Payments on Account Calculator
Estimate instalments and the balancing payment from the figures entered.
Dividend Tax Calculator
Estimate dividend tax after income bands and the applicable allowance are considered.
Rental income and asset sales
Property and Capital Gains Tax calculators
Capital Gains Tax Calculator
Estimate a gain using disposal proceeds, allowable cost information and available relief inputs.
Rental Profit Tax Calculator
Estimate taxable rental profit from income and the expenses entered.
Mortgage Interest Tax Relief Calculator
Estimate the effect of the residential property finance-cost restriction.
Non-Resident Landlord Tax Calculator
Estimate UK tax relating to rental income where the landlord lives overseas.
Companies and employers
Business and company tax calculators
Corporation Tax Calculator
Estimate company tax from taxable profit and the rate assumptions used by the tool.
Salary vs Dividend Calculator
Compare estimated personal and company effects of director remuneration choices.
VAT Calculator
Add VAT to a net amount or extract the VAT element from a gross amount.
Payroll Tax Calculator
Estimate PAYE, employee National Insurance and selected employer payroll costs.
Dates and penalties
HMRC late-filing penalty calculator
Before relying on the result
A calculator only answers the question built into its inputs
If the question is incomplete, the result can still look precise while being wrong for the actual position.
Ask us to check an estimate →The tool may calculate
- Tax using the selected year and bands
- An estimate from the amounts entered
- A comparison between defined scenarios
- A total before rounding or filing adjustments
The tool may not establish
- Whether all income and transactions were included
- Residence, ownership or employment status
- Eligibility for a relief, claim or election
- Whether another return or deadline is connected
Cardiff and Welsh tax context
Check the jurisdiction as well as the tax year
A UK calculator may not cover every rule that differs by country or transaction type.
Welsh taxpayer status
Welsh taxpayers are identified separately for Income Tax. Check the assumptions used by an income or dividend tool against the official Welsh Income Tax guidance.
Land Transaction Tax is separate
The rental-profit and Capital Gains Tax tools do not calculate purchase tax. Property transactions in Wales may involve Land Transaction Tax.
Rates depend on income and timing
A gain can cross tax bands, and rates or reliefs can change. Compare the tool’s tax year with the current Capital Gains Tax rates.
A useful calculation process
Move from an estimate to a supported figure
The result becomes reliable only when the inputs agree with the records and the correct tax treatment has been applied.
- 01
Select
Choose the calculator and tax year matching the event.
- 02
Enter
Use figures from the actual records rather than memory.
- 03
Check
Review assumptions, omitted income, ownership and relief conditions.
- 04
File
Prepare the required return or report from the supported calculation.
Need the result checked?
Ask us to review the figures and assumptions
Tell us which calculator you used, the tax year and what the estimate relates to. Do not send bank details, passwords or complete tax records through this enquiry form.
Common questions
UK tax calculator questions
Use the tool for an estimate and the supporting records for the actual return or advice.
Are the tax calculator results exact?
No. The result is an estimate based on the inputs and assumptions built into that calculator. The actual tax position may change because of omitted income, reliefs, ownership, residence, timing or another connected filing.
Which tax year should I select?
Select the year in which the income, gain, company period or filing obligation arose. The current UK tax year runs from 6 April 2026 to 5 April 2027, but an earlier return requires the rates and allowances for that earlier year.
Which calculators are useful for a landlord?
A landlord may use the Rental Profit Tax Calculator, Mortgage Interest Tax Relief Calculator, Non-Resident Landlord Tax Calculator and Capital Gains Tax Calculator. Rental income and a property disposal remain separate calculations.
Which calculators are useful for a company director?
A director may use the Dividend Tax Calculator, Salary vs Dividend Calculator, Corporation Tax Calculator and Payroll Tax Calculator. Company and personal tax results should be reviewed together but filed separately.
Does the property calculator include Welsh Land Transaction Tax?
No. The rental-profit and Capital Gains Tax tools shown here do not calculate the tax on purchasing Welsh property. Land Transaction Tax is a separate Welsh transaction tax.
Can I use a calculator result in a tax return?
Only after the inputs, tax year, treatment and supporting records have been checked. A calculator output is not itself evidence and does not replace the return, accounts or calculation schedule required for filing.
Can you check a result before I file?
Yes. Send the calculator name, tax year and a short explanation through the review form. We will identify the records and scope needed to check the calculation.