United Kingdom calculators

United Kingdom calculators

Plan work, childcare, savings and household costs with tools that state which UK nations and rules they support. Start with your own figures and compare practical scenarios.

Calculator categories

Family

Childcare Cost and Support Planner

Plan childcare costs after supported funded hours and Tax-Free Childcare. See uncovered hours, extras and the amount your family may need to pay.

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Pensions

Pension Salary Sacrifice Comparison

Compare pension salary sacrifice, net pay and relief-at-source contributions. See estimated take-home impact and pension funding using the selected tax year.

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Savings

Savings Interest Tax Calculator

Estimate tax on savings interest, including your share of joint accounts and available allowances. Keep ISA interest separate from taxable savings.

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Savings

ISA Allowance and Savings Planner

Track ISA subscriptions and estimate remaining allowance for the tax year. Separate transfers, Lifetime ISA limits and eligible flexible replacements.

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Family

Maternity Pay Timeline Planner

Plan a maternity-pay timeline with statutory pay and confirmed employer top-ups. See gross pay by period and where household income may change.

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Home

Council Tax Discount and Instalment Planner

Estimate a council tax bill after a confirmed discount and plan remaining instalments. Supports England and Wales with your council's annual charge.

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Home

Energy Tariff Cost Comparison

Compare energy tariffs using your consumption, unit rates and standing charges. Include switching fees and see estimated costs on the same usage basis.

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Travel

Rail Season Ticket Break-Even Calculator

Compare daily rail tickets, seasons and supported Flexi tickets using your actual travel dates. See break-even days and unused ticket coverage.

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Renting

England Tenancy Deposit Cap Calculator

Check the tenancy and holding-deposit caps for supported England tenancies. Convert rent correctly and compare a requested deposit with the calculated cap.

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Work

Holiday Entitlement Calculator

Regular and irregular leave quantities for supported Great Britain patterns.

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Pay & tax

UK Take-Home Pay Calculator 2026/27

Income Tax, NI, pension and student-loan deductions.

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Pay & tax

Self-Employed Tax Calculator

Estimate sole-trader Income Tax and Class 4 NI.

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Contractors

IR35 & Contractor Take-Home Calculator

Compare outside-IR35 and umbrella scenarios.

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Business

UK Employer Cost Calculator

Salary, employer NI, pension, benefits and overhead.

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Home

Stamp Duty, LBTT & LTT Calculator

Property tax for England/NI, Scotland and Wales.

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Home

UK Mortgage & Affordability Calculator

Repayment, interest-only and rate-stress scenarios.

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Home

Mortgage Overpayment Calculator

Estimate time and interest saved by overpaying.

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Student finance

UK Student Loan Repayment Calculator

Plans 1, 2, 4, 5 and postgraduate loans.

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Work

Statutory Redundancy Pay Calculator

Age, service and capped weekly-pay estimate.

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Business

UK VAT Calculator

Add, remove and compare flat-rate VAT.

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Choose a starting point

Start with take-home pay to understand your income, then compare borrowing costs, housing payments or retirement contributions. Use the same income period and assumptions when comparing results.

How to check an estimate

Each calculator explains its inputs and limitations. Check the applicable year and official sources on the tool page. Tax, lender and employer decisions may use details outside the model.

Calculation methodology · Data handling · All tools