Why a safety net matters
Unexpected costs happen to everyone. Without savings, a broken boiler, a vet's bill or losing your job can push you into expensive debt. It can also force you to sell investments at a bad time. A safety net gives you breathing space when things go wrong.
Start with expensive debt
Interest on credit cards, overdrafts and some loans is often far higher than you're likely to earn from savings or investments. Paying it off is one of the few guaranteed returns available.
A common approach is to:
- keep making at least the minimum payment on every debt, to avoid charges and damage to your credit record
- put any extra money towards the debt with the highest interest rate
- move on to the next most expensive debt once that one is cleared.
Many people keep a small starter fund, such as £500 to £1,000, while they pay off debt. That way, a surprise bill doesn't go straight back on a credit card.
Student loans work differently from other debts. Repayments depend on how much you earn, and any balance is usually written off after a set number of years. That's why they're generally treated differently from expensive debts like credit cards.
How much to save
A common rule of thumb is to keep three to six months of essential spending. That means your essentials, not your full income. Use the essentials figure from your budget.
For example, if your essentials cost £1,200 a month, you'd aim for between £3,600 and £7,200. You might aim towards the higher end if your income is irregular, you're self-employed or other people depend on you.
You don't need to save it all at once. A regular transfer on payday builds it steadily.
Where to keep it
Your safety net should be:
- easy to reach, ideally within a day or two
- safe, so it isn't invested in anything that could fall in value
- separate from your current account, so you're not tempted to spend it.
An easy-access savings account or an easy-access cash ISA both work well. Check that the bank or building society is covered by the Financial Services Compensation Scheme (FSCS). Since 1 December 2025, the FSCS protects up to £120,000 per person, per authorised bank or building society.
Most people can earn some interest tax-free through the Personal Savings Allowance. It's £1,000 a year for basic-rate taxpayers, £500 for higher-rate taxpayers and nothing for additional-rate taxpayers.
When to use it
Use your safety net for real emergencies, such as losing your job, urgent repairs or an unexpected bill you can't avoid. Save separately for holidays and planned purchases. If you do dip into it, make refilling it a priority.
Common questions
Should I invest my emergency fund?
Generally, no. Investments can fall in value, and that could happen just when you need the money. Keep your safety net in cash.
Should I pay off debt or save first?
A common approach is to build a small starter fund first, then clear expensive debt, then build your full safety net. That way, an unexpected bill doesn't push you back into debt.
Is my money safe in a bank?
Money in a UK-authorised bank or building society is protected by the FSCS up to £120,000 per person, per institution. If you have more than that, you can spread it across different institutions.
Sources
We checked this guide against these sources on 8 October 2026. Rules and allowances can change, so always check the latest position on GOV.UK.
- GOV.UK: Tax on savings interest
- Bank of England: FSCS deposit limit rises to £120,000
- StepChange Debt Charity
- MoneyHelper
This guide is general information, not personal financial advice. Read our full disclaimer.