Taxable Income Calculator UK

What Is Taxable Income?

Taxable income is the portion of your gross income that is subject to Income Tax after deducting your Personal Allowance, pension contributions and other allowable deductions. This taxable income calculator UK helps you determine how much of your income is actually taxed.

How to Use the Taxable Income Calculator

Enter your gross income, Personal Allowance, pension contributions and any other deductions. Click Calculate Taxable Income to see your taxable income, total deductions and how much income is tax-free.

How Taxable Income Is Calculated

Your taxable income is calculated using this formula:

Only the resulting amount is subject to Income Tax. If taxable income is zero or negative, you pay no Income Tax.

What Counts as Gross Income?

Gross income includes all your taxable income sources:

• Employment income (salary, wages, bonuses)
• Self-employed profits
• State and private pensions
• Rental income
• Investment income (dividends, savings interest)
• Other taxable income

What is the Personal Allowance?

The Personal Allowance is the amount of income you can earn before paying Income Tax. For the 2025/26 tax year, the standard Personal Allowance is £12,570. This is reduced by £1 for every £2 of income above £100,000.

What Deductions Can I Claim?

• Pension contributions — contributions to workplace or personal pensions
• Work expenses — business expenses not reimbursed by your employer
• Charitable donations — Gift Aid donations
• Marriage Allowance — transfer of Personal Allowance between spouses
• Trading losses — losses from self-employment

Taxable Income Example

Taxable Income vs Gross Income

Gross income is your total income before any deductions. Taxable income is the amount after deducting your Personal Allowance, pension contributions and other reliefs. Tax is only calculated on taxable income.

Why Taxable Income Matters

• It determines how much Income Tax you pay
• It affects your tax bracket (basic, higher, additional)
• It impacts eligibility for certain benefits and allowances
• It's used for student loan repayment calculations
• It's the basis for self-assessment tax returns

Common Taxable Income Mistakes

• Forgetting the Personal Allowance — this reduces your taxable income.
• Not including pension contributions — they reduce taxable income.
• Missing allowable deductions — claim all eligible expenses.
• Using the wrong Personal Allowance — it may be reduced if you earn over £100,000.
• Confusing gross and taxable income — taxable income is after deductions.

Important Assumptions and Limitations

• Tax year: 2025/26
• Standard Personal Allowance: £12,570
• No other income sources (dividends, savings) are included
• No benefits or salary sacrifice adjustments are included
• Results are estimates, not exact tax calculations

Frequently Asked Questions