Tax Calculator
Articles, guides, and in-depth tips for the Tax Calculator — everything you need to get the most out of it.
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Salary Sacrifice Saves NI as Well as Income Tax — Here's the Full Calculation Most Pension Communications Skip
Why Not All Tax Deductions Are Equal: Pension Relief, Gift Aid, and the Order That Changes Your Bill
Income tax is calculated on what's left after deductions — but the type and order of deductions changes your final bill even when the total amount is the same. Here's why pension contributions that reduce "Adjusted Net Income" can restore the personal allowance (creating 60% effective relief near £100k), how Gift Aid works in two directions, why the April 5th timing boundary matters, and the capital vs revenue distinction for business expenses.
Self-Employment Tax: NICs, Allowable Expenses, Payments on Account, and the Ltd Company Decision
Self-employed people pay income tax, Class 4 NICs, and implicitly bear employer NI — more than equivalent employees on the same gross. Here's the complete UK self-employment tax picture, allowable expenses that reduce taxable profit, the payment on account cash flow trap, and when a limited company saves enough to justify the admin.
How Income Tax Brackets Actually Work: Progressive Tax, UK's Hidden 60% Band, and Effective vs Marginal Rates
Tax brackets don't apply to all your income — only to the income in that band. Here's exactly how progressive tax works with UK and US examples, the UK's hidden 60% tax band between £100k–£125k, why National Insurance is effectively a second income tax, and the difference between marginal and effective rates.
Tax Calculator — Find Your Effective Tax Rate & Maximise Deductions
Learn how progressive income tax slabs work, why your effective rate is lower than your marginal rate, which deductions reduce your liability, and how to use a free tax calculator to verify TDS and plan optimally.
Tax Calculator — Calculate Your Income Tax Liability Instantly
Learn how income tax is calculated using progressive slabs, which deductions reduce your liability, and how to use a free tax calculator to find your exact tax amount before filing.
