Free UK Tax & Finance Calculators
Where do you rank among UK earners?
Enter your salary to instantly see your percentile.
All Calculators
Pick a calculator below — all free, all updated for 2025-26.
💼 Tax & Income
🏠 Property
💰 Savings & Investments
Pension Tax Relief
See exactly how much pension contributions save you in tax
Capital Gains Tax
Calculate CGT on shares, property and other assets
Compound Interest
See how your savings and investments grow over time
FIRE Calculator
Find out when you can retire early — based on your savings rate
Budget Planner
Track monthly income vs expenses with the 50/30/20 rule — auto-saved
Can I Afford This?
Find out if a purchase or commitment truly fits your budget — with a straight verdict.
🧮 VAT & Business
🎓 Student & Benefits
🔢 Everyday
Percentage Calculator
Calculate percentages, discounts and changes instantly
Discount Calculator
Calculate final price after any discount instantly
Tip Calculator
Split the bill and calculate tips for any group
Loan Calculator
Monthly repayments and total cost of any personal loan
BMI Calculator
Calculate your Body Mass Index using NHS guidelines
Days Working for HMRC
See how many of your 260 working days go to the government
Inflation Calculator
See what £100 from any past year is worth in today's money
Cost of Living by City
Does your salary go further in Manchester or London?
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Why CalcSimplr?
Instant results
No waiting. Results update as you type.
Works on mobile
Designed for phones first — not an afterthought.
UK 2025-26
Always up to date with the latest HMRC tax rates.
Tax-saving tips
Each calculator shows you how to legally pay less tax.
Not sure where to start?
The salary calculator is the most popular — find out your exact take-home pay in seconds.
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