Most useful starting point: ISA Calculator
The ISA calculator helps you estimate future ISA growth, check remaining annual allowance and model regular contributions inside a tax-efficient wrapper.
Use ISA calculatorUK Personal Finance — Calculators, Guides & Tools
Practical UK calculators and explainers for savings, ISAs, pensions, investments, tax, inflation, emergency funds and net worth.
12 calculators
UK-focused
Tax-aware tools
Glossary support
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Start with the right personal finance tool
Use this hub as a route map. If you are planning savings, start with the ISA, savings goal or emergency fund tools. If you are investing, use compound interest, investment return, dividend yield, Capital Gains Tax and inflation tools together. If you are building long-term wealth, start with pension, FIRE and net worth.
Personal finance calculators
These calculators are designed to work as a connected set, so each page links naturally to the next step in the decision.
ISA Calculator
Estimate ISA growth, regular contributions and remaining annual allowance.
Use calculator →Savings Goal Calculator
Work out how long it may take to reach a savings target.
Use calculator →Self-Employed Tax Calculator
Estimate income tax and Class 4 National Insurance on self-employed profit.
Use calculator →Capital Gains Tax Calculator
Estimate CGT on shares, funds, property or other taxable assets.
Use calculator →Compound Interest Calculator
Project how savings or investments could grow over time.
Use calculator →Inflation Calculator
Estimate future prices and the purchasing power of money.
Use calculator →Investment Return Calculator
Calculate simple return, gain or loss and annualised performance.
Use calculator →Pension Calculator
Project pension pot growth, contributions and possible retirement income.
Use calculator →FIRE Calculator
Estimate your financial independence number and time to FIRE.
Use calculator →Dividend Yield Calculator
Estimate dividend yield, dividend income and dividend tax.
Use calculator →Emergency Fund Calculator
Estimate your cash buffer target and how long it may take to build.
Use calculator →Net Worth Calculator
Add assets and liabilities to estimate your current net worth.
Use calculator →Personal finance guides
These guides support the calculators by explaining the decisions behind the numbers.
Cash ISA vs Stocks and Shares ISA
Compare access, risk, returns and where each ISA type fits.
How much should you save each month in the UK?
Turn income, goals and emergency fund targets into a monthly saving plan.
Pension vs ISA in the UK
Understand flexibility, tax relief, access age and when each option helps.
How compound interest builds wealth
See why time, regular contributions and reinvested growth matter.
ISA, dividend and CGT allowances explained
Connect tax allowances with investment accounts and taxable holdings.
How to use this personal finance hub
Start with your financial question, then use the calculator that answers the first decision. For example, if the question is “how much should I keep in cash?”, use the emergency fund calculator first. If the question is “how much could this grow?”, use compound interest, ISA or pension calculators.
For investment questions, use more than one tool. Investment return can show historic performance, compound interest can project future growth, inflation can show real purchasing power and Capital Gains Tax can estimate tax on gains outside a wrapper.
| Question | Start with | Then compare with |
|---|---|---|
| How much should I save for emergencies? | Emergency Fund Calculator | Savings Goal Calculator, Net Worth Calculator |
| How much can I put into an ISA? | ISA Calculator | Compound Interest Calculator, Investment Return Calculator |
| Am I on track for retirement? | Pension Calculator | FIRE Calculator, Inflation Calculator |
| What did my investment actually return? | Investment Return Calculator | Dividend Yield Calculator, Capital Gains Tax Calculator |
| How much is my full financial position worth? | Net Worth Calculator | Emergency Fund Calculator, Debt-to-Income Ratio Calculator |
Build your personal finance picture in order
Start with your emergency fund, check your net worth, then plan savings, ISAs, pensions and investments.
Calculatorz provides estimates only and may earn commission from some links. This does not affect calculator results.
Personal finance glossary
These terms connect the calculators and help explain the assumptions behind each result.
Personal finance calculator FAQs
What personal finance calculators are included?
This hub includes calculators for ISAs, savings goals, self-employed tax, Capital Gains Tax, compound interest, inflation, investment returns, pensions, FIRE, dividend yield, emergency funds and net worth.
Are the calculators UK-focused?
Yes. The calculators use UK terminology and UK tax assumptions where relevant.
Are the results financial advice?
No. Calculatorz tools provide estimates for planning and education only. They are not personalised financial, tax or investment advice.
Which calculator should I start with?
Start with the calculator that matches your immediate question: ISA for allowance planning, savings goal for a target, net worth for your financial snapshot, or emergency fund for cash buffer planning.
Do the pages link to glossary explanations?
Yes. The silo includes glossary pages for terms such as ISA allowance, compound interest, inflation, emergency fund, net worth and Capital Gains Tax.