What this Self Assessment calculator helps with
This calculator is designed for common UK Self Assessment cases where a person may have employment income, sole trader profit, rental profit, dividends, savings interest, student loan repayments or payments on account.
Quick access
Use our live calculator to estimate your tax, then request a professional review if you are unsure before filing with HMRC.
Open the Tax Calculator →Who needs to file a Self Assessment tax return?
You may need to file a Self Assessment tax return if you are self-employed, receive rental income, receive dividends, have untaxed income, are a company director with additional income, or need to report capital gains or foreign income.
Common income types included
- Employment income and PAYE tax deducted
- Self-employment turnover and allowable expenses
- Rental profit from UK property
- Dividends from limited companies
- Savings interest
- Pension contributions and Gift Aid
- Student loan repayment estimate
When should you get accountant review?
You should consider professional review if you have mixed income, dividends, property income, payments on account, student loans, income over £100,000, VAT registration risk, capital gains, foreign income or residence issues.
Need your Self Assessment checked?
Avoid overpaying tax or making costly mistakes. Get your figures reviewed by a UK accountant before submitting to HMRC.
Ask for Self Assessment Help →Self Assessment FAQs
What is Self Assessment?
Self Assessment is the system used by HMRC to collect tax from people and businesses where tax has not been fully collected through PAYE.
Can I calculate my Self Assessment tax online?
Yes. A calculator can give an estimate, but final figures should be checked carefully before submission.
Do dividends go on a Self Assessment tax return?
Dividends may need to be reported depending on the amount received and your overall tax position.
Do landlords need to file Self Assessment?
Landlords usually need to report rental income and expenses through Self Assessment unless HMRC confirms otherwise.
What happens if I file late?
Late filing can lead to penalties and interest, so it is important to prepare early and keep accurate records.
Related tools and guides
This page is for general information only and does not constitute tax advice. Final tax figures should be reviewed based on your specific circumstances.