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Emergency Fund Calculator

Work out how much you need as a financial safety net.

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Your outgoings

£/month
Months of cover
Current savings
£

Recommended fund

£9,000
6 months of outgoings
You already have£3,000
You still need£6,000
Progress33%
Your progress
33%
67%

How to work out your emergency fund

Understand each figure so you can build the financial safety net that suits your situation

Monthly outgoings

Basis of the calculation

The total of your fixed and variable spending each month. Include every essential: rent or mortgage, utilities (electricity, water, gas, broadband), food, transport, insurance and loan repayments. Don't include discretionary spending such as nights out or eating out, since in a genuine emergency these would be the first things to go.

Example
Rent £800 + utilities £150 + food £400 + transport £100 = £1,450/month

Months of cover

Level of security

The number of months you want to be able to cover with no income coming in. The standard guidance is between 3 and 6 months for employees on a permanent contract. If you're self-employed, work in a sector with volatile employment, or have dependants, it's sensible to aim for between 6 and 12 months of cover.

Example
With outgoings of £1,500/month and 6 months of cover, you need £9,000 in reserve

Monthly income

Your capacity to save

Your net monthly income (your take-home pay). It tells you how much room you have to save each month and, in turn, how long it will take to build the full fund. The gap between income and outgoings sets the pace at which your safety net grows.

Example
On £2,000 take-home pay with £1,500 of outgoings, you can save £500/month towards your emergency fund

Current savings

What you already have

The money you've already put aside that you can count towards the emergency fund. The gap between your target and what you already have is the amount you still need to build up. If you hold savings in other accounts, check whether they should count towards the fund or are earmarked for other goals.

Example
Target £9,000, you have £3,000 → £6,000 to go → at £500/month = 12 months to complete it

Use a separate account

Keep your emergency fund in a separate account, ideally an easy-access savings account or a short-term deposit. Don't mix it with your everyday money or you'll end up dipping into it without noticing.

Accessible, but not too accessible

The fund should be liquid (available within 24–48 hours) but not so easy to reach that you spend it on non-emergencies. An account with a different bank from your usual one adds just the right amount of friction.

Top it up after you use it

If you draw on the fund for a genuine emergency, rebuild it as soon as you can. Set up an automatic top-up plan with regular standing orders until you're back to your target level.

How much money do you need in your emergency fund?

An emergency fund is a pot of accessible cash set aside purely to cover unexpected costs: a car breakdown, a sudden job loss, an urgent repair at home or an unexpected medical bill. It isn't a financial luxury — it's the foundation on which any personal finance strategy is built. Without this cushion, any surprise can force you into debt or push you to cash in investments at the worst possible moment.

It's vital to keep your emergency fund separate from money you're saving to invest. The emergency fund is off limits for other purposes: it isn't for holidays or for investment opportunities. Once your safety net is complete, any money you keep saving on top can go towards longer-term goals.

Recommended fund by profile

Employment profile Months recommended Example (£1,500/month) Reason
Public sector employee (permanent) 3 months £4,500 Very stable job
Private sector employee (permanent) 3 – 6 months £4,500 – £9,000 Moderate risk
Self-employed or freelance 6 – 12 months £9,000 – £18,000 Variable income
With dependants or a mortgage 9 – 12 months £13,500 – £18,000 Greater exposure to risk

Example: time to build the fund

Monthly outgoings £1,500/month
Target cover 6 months
Fund required £9,000
Current savings £3,000
Amount outstanding £6,000
At £500/month → complete in 12 months

Where should you keep your emergency fund? The best option is an easy-access savings account or a short-term deposit that gives you immediate access to your money. Some online banks currently offer between 2% and 4% AER on easy-access accounts with no fixed term. Never invest the fund in shares or cryptocurrency: the aim isn't to make a return on it, but to have it available when you need it — even if the markets are in freefall.

Official resource: MoneyHelper, the government-backed service from the Money and Pensions Service, offers free, impartial guidance on managing your money, protecting yourself against the unexpected and planning your long-term savings. It's the official reference for consumers in the UK.

Once your emergency fund is in place, any spare money can go towards longer-term goals. To plan how to reach a specific target, use the savings goal calculator. And when you want to put that capital to work, the compound interest calculator will show you the power of saving over the long run.

Note: The recommended months of cover are a guide based on general principles of personal financial planning. Everyone's situation is different; speak to a financial adviser for advice tailored to you.

Frequently asked questions about emergency funds

We answer the most common questions about the emergency fund

The standard guidance is to have between 3 and 6 months of total outgoings covered. The ideal amount depends on your risk profile, though: if you're an employee on a permanent contract in a stable sector, 3 months may be enough. If you're self-employed, freelance or work in a sector with high turnover, aim for 6 or even 12 months. Don't forget to factor in whether you have people who depend on you financially, a mortgage or other fixed debts, as these raise your exposure to risk if something unexpected happens.
Your emergency fund should sit in a product that combines three things: safety, instant access and a clear separation from your everyday money. Easy-access savings accounts or the higher-rate accounts offered by online banks are the most recommended option, as they pay some interest without locking your money away. It's wise to keep it in a different account from your main current account to avoid the temptation to spend it day to day. What you should avoid are products with penalties for early withdrawal, long fixed terms or anything exposed to market volatility.
No, and this is one of the most common personal finance mistakes. The stock market and investment funds can lose value at any moment, and emergencies don't give warning. If your emergency fund is invested in shares and the market falls 30% just as you lose your job, you'll be forced to sell at a loss at the worst possible time. The emergency fund should be in products with no risk to your capital and with instant access. Once your safety net is complete and secure, any extra money you save can then go towards long-term investments.
In the monthly figure you should include all fixed and essential spending: rent or mortgage, utilities (electricity, water, gas, broadband), food, transport, insurance, loan repayments and any recurring cost you can't do without. You don't need to include discretionary spending such as nights out, eating out or non-essential subscriptions, since in a genuine emergency these would be the first to go. The idea is to work out the minimum you need to keep your basic lifestyle going for as long as the emergency lasts.
Using the emergency fund for what it was created for is exactly the right thing to do — you shouldn't feel bad about it. Once the emergency is over, your number one priority should be to rebuild the cushion as soon as possible. Consider temporarily increasing the share of your income that goes to savings until you're back to your target level. If the emergency was a big one and it'll take months or years to rebuild the fund, set out a concrete plan with a fixed monthly amount to put towards it, just as you would with any other financial goal.
Money held in a savings account isn't taxed simply for existing: you only need to account for the interest it earns. Thanks to the Personal Savings Allowance, basic-rate taxpayers can earn up to £1,000 of savings interest tax-free each year (£500 for higher-rate taxpayers, and nil for additional-rate taxpayers). So if your account pays, say, 2% AER and you hold £9,000, the £180 of annual interest would usually fall well within the allowance. You can also shelter savings interest entirely by using a cash ISA. Beyond any interest, the emergency fund itself creates no extra tax obligation — the cash on its own isn't taxed.

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Other tools to manage and grow your savings

Savings Goal

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Compound Interest

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Net Salary

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