Calculator Institute — Free UK Calculators
Free · Updated 2025/26 · UK Finance

Every
calculator
you actually
need.

Salary, tax, pension, stamp duty, capital gains, Universal Credit — every tool built from scratch for UK rules and updated every tax year.

Most used right now
All calculators
Finance Calculators
Average UK Take-Home Pay by Region, 2025/26
Updated for the 2025/26 tax year. We took the Office for National Statistics' latest regional pay data and ran every…
Open →
All Latest Calculators
Rent-a-Room Scheme Calculator UK 2025/26 — £7,500 Tax-Free Threshold
Rent-a-Room Scheme Calculator UK 2025/26Find out how much of your lodger or Airbnb income is tax-free under the £7,500 Rent-a-Room…
Open →
All Latest Calculators
Redundancy Pay Tax Calculator UK 2025/26 — £30,000 Tax-Free Threshold
Redundancy Pay Tax Calculator UK 2025/26Find out how much tax you owe on your redundancy payment — including the £30,000…
Open →
All Latest Calculators
Trading Allowance Calculator UK 2025/26 — £1,000 Tax-Free Side Income
Trading Allowance Calculator UK 2025/26Find out if your side income from freelancing, selling online, or casual work is covered by…
Open →
All Latest Calculators
Savings Interest Tax Calculator UK 2025/26 — PSA, Higher Rate & Starting Rate
Savings Interest Tax Calculator UK 2025/26Find out how much tax you owe on your savings interest after your Personal Savings…
Open →
All Latest Calculators
State Pension Calculator UK 2025/26 — Forecast, Top-Up Cost & Deferral
Free · 2025/26 · UK State Pension Calculator 2025/26 £221.20/week full rateQualifying years forecastNI top-up costDeferral boost Estimate your State…
Open →
All Latest Calculators
Tax Code Calculator UK 2025/26 — What Does My Tax Code Mean?
Free · 2025/26 · UK Tax Code Calculator 2025/26 Decode any tax codeTax-free allowance shownEmergency codes explainedHow to fix a…
Open →
All Latest Calculators
Stamp Duty 2024 vs 2025 Calculator UK — Before and After April 2025 Threshold Changes
Free · England & NI · April 2025 Change Stamp Duty 2024 vs 2025 Calculator Nil-rate dropped £250k → £125kFTB…
Open →
All Latest Calculators
Contractor Expenses Calculator UK 2025/26 — Ltd Company Allowable Expenses & Tax Savings
Free · 2025/26 · Ltd Company Contractor Expenses Calculator 2025/26 Allowable business expensesCorporation tax savingNI saving shownTotal annual relief Enter…
Open →

2025/26
Every UK finance calculator updated at the start of each tax year. Current rates, current thresholds.
No sign-up
Enter your numbers and get your answer. No account, no email — everything runs in your browser.
UK-only
Not US tools with a currency swap. Built from scratch for UK rules, UK bands, UK products.
390+ free tools

Find the right calculator for you.

From redundancy pay to rental yield — every tool is free, instant, and built for the UK.

Latest Calculators
Scroll to Top