Income Tax Calculator (2026/2027)
Accurately calculate your tax return, estimate your after-tax income, and know exactly what you owe HMRC before deadline day.
Looking for a general overview of all our digital tax tools? Explore our full range of tax calculators to manage every income stream in one place.
Smart Personal Income Tax Calculator for UK Taxpayers
Navigating UK tax rates, National Insurance thresholds, and Self Assessment rules shouldn't require an accounting degree. Whether you are employed under PAYE, self-employed as a sole trader, or earning side income, using an accurate income tax calculator gives you total clarity over your financial health.
Our income tax calculator UK tool evaluates your total earnings against HMRC tax bands, personal allowances, and statutory deductions. In seconds, you can project your full-year liabilities and see your true salary after tax without relying on manual spreadsheets or outdated estimates.
How to Calculate Your Tax Return & After-Tax Income
To calculate your tax return accurately, our online tool processes your gross income through a simple step-by-step framework:
- Enter Your Gross Annual Earnings: Input all income streams, including your main salary, freelance revenues, rental earnings, or dividends.
- Apply Your Personal Allowance: The standard UK Personal Allowance lets most taxpayers earn up to £12,570 tax-free each year.
- Account for Allowable Business Expenses: If you are self-employed, subtract allowable expenses to calculate your net taxable profit.
- Calculate Income Tax Bands: Your taxable income is processed through HMRC’s marginal rates (Basic Rate, Higher Rate, and Additional Rate).
- Deduct National Insurance (NI): Automatically factor in Class 1 (employed) or Class 2 and Class 4 (self-employed) National Insurance contributions.
If you receive earnings from more than one source, use our multiple income tax calculator to combine paye wages, freelancing, and secondary streams accurately.
UK Income Tax Rates & Allowances
Understanding where your income falls across UK tax thresholds is essential when using a personal income tax calculator. Income Tax is charged on a progressive scale, meaning you only pay higher rates on income above each threshold.