Emergency Fund Calculator
Work out how big your emergency fund should be and how long it will take to build.
Your result
Updates as you type. Based on 2025/26 UK figures where relevant.
How this is worked out
Multiply your essential monthly spending by the months of cover you want. Take off what you've saved and divide by your monthly saving.
Tips
- Pay off high-interest debt before saving beyond a basic emergency fund.
- Use your £20,000 ISA allowance each year where you can – it doesn't roll over.
- Check whether your savings rate beats inflation; if not, your money is losing value.
Guides for this calculator
- How to Calculate an Emergency Fund in the UK: Step-by-Step Guide
- An Emergency Fund: Common Mistakes, Tips and FAQs
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Frequently asked questions
How does the emergency Fund Calculator work?
Multiply your essential monthly spending by the months of cover you want. Take off what you've saved and divide by your monthly saving.
Are returns guaranteed?
No. Savings and investment projections are illustrations based on the rate you enter. Investments can go down as well as up.
What rate should I use for investments?
Many people test a cautious 4–5% and a more optimistic 6–7% to see a range of outcomes.
Is my savings interest taxed?
Basic-rate taxpayers have a £1,000 Personal Savings Allowance, higher-rate taxpayers £500. Interest inside an ISA is tax-free.
This calculator gives an estimate for general information. It isn't financial, tax, legal or medical advice. Check official figures on GOV.UK or NHS.uk, or speak to a qualified adviser.