On this page19 sections
For most UK savers the answer is an easy-access savings account, opened recently, at a bank or building society that is not the one holding your current account. That covers the four things an emergency fund has to do. Everything below is about the cases where that answer is wrong, and about the money you should not keep there.
Once you know how much emergency fund you need, the where question gets answered badly a lot — usually by chasing the top of a best-buy table and ending up with money that cannot be reached on the day it is needed.
What an emergency fund actually has to do
- Accessible. Same day, or next working day at the absolute latest. An emergency that can wait 90 days for a notice period is not an emergency.
- Safe. Protected by a compensation scheme, not just by the reputation of the brand on the app icon.
- Stable. The balance must not be able to fall. This rules out investments entirely.
- Separate. Not in the account you spend from.
Interest comes fifth. Not irrelevant — the next section puts a number on what it costs you — but you decide access first and optimise rate within that constraint, not the other way round.
FSCS protection: the number changed, and most pages have not caught up
FSCS deposit protection rose to £120,000 per eligible person, per authorised firm on 1 December 2025, up from the £85,000 that had applied since 1 January 2017 (Financial Services Compensation Scheme). Temporary high balances — money from a house sale, redundancy payment or inheritance — are covered up to £1.4 million for up to six months after the money lands.
FSCS deposit protection since 1 December 2025
Source: Financial Services Compensation Scheme, Deposit limit increase, effective 1 December 2025
Three things about that limit trip people up.
It is per licence, not per brand. Several high-street names share a single banking licence, which means holding money in two of them gives you one £120,000 allowance between them, not two. The FSCS publishes a checker that maps brands to licences. Use it before you split a large balance, not after.
It doubles on a joint account, because it is per person. A jointly held savings account has two eligible depositors, each bringing their own £120,000 of cover to their share. For couples with a large shared fund that is the cheapest way to stay protected, and one more reason the joint account versus separate accounts decision is worth making deliberately rather than by drift.
Not everything with an app is a bank. Some fintech and e-money accounts are not deposit-taking banks at all. Your money is safeguarded — held separately at a partner bank — rather than FSCS-protected, which is a different legal position with a different outcome if the provider fails. The provider has to tell you which it is. Check before your emergency fund lives there.
If you have read older guidance quoting £85,000, that figure is out of date.
The trade-off, with numbers on it
Everyone writes that easy-access accounts pay less than fixed-term ones. Almost nobody says how much less, which makes it impossible to judge whether the access is worth paying for.
The Bank of England publishes the effective rate households actually receive, rather than the headline rates in best-buy tables. In June 2026 the average on new fixed-term household deposits was 4.30%. The average paid across the existing stock of household sight deposits — instant-access savings and current accounts — was 1.65% (Bank of England, Money and Credit, June 2026).
What UK households actually earn on cash
Effective interest rates, June 2026, against Bank Rate
Source: Bank of England, Effective interest rates, household deposits, June 2026; Bank of England, Bank Rate, decision announced 30 July 2026
Two conclusions follow, and they point in different directions.
The gap between 4.30% and 1.65% is 2.65 percentage points. On £6,000 — close to the median cash savings balance the FCA found among UK adults who have savings, which sat between £5,000 and £6,000 in May 2024 (Financial Conduct Authority, Financial Lives 2024) — that difference is about £159 a year before tax. That is a real cost, but it is not a reason to lock up money you might need in a fortnight. It is a reason to be precise about how much of your fund genuinely needs instant access.
The second conclusion is more useful. The 1.65% figure is the average across existing balances, and it is so low not because instant access is inherently worthless but because most instant-access money sits in accounts opened years ago at rates long since cut. Bank Rate was 3.75% at the July 2026 decision. An instant-access account paying 1.65% against that is not the price of liquidity; it is the price of inattention. The fix is a new account, not a notice period. This is not a British quirk either: US savings accounts averaged 0.38% against 1.68% on a 12-month CD in July 2026, and Irish overnight deposits paid 0.14% against 1.81% on new term deposits, so the penalty for leaving cash where it landed shows up in every market with published rates.
The four options, head to head
Where a UK emergency fund can live
- ProtectionFSCS, £120,000 per person per firm
- Balance can fallNo
- Tax on interestTaxable, though the Personal Savings Allowance may cover it
- Rate riskVariable — can be cut, and bonuses expire
- Amount you can holdNo annual limit
- ProtectionFSCS, £120,000 per person per firm
- Balance can fallNo
- Tax on interestTax-free, permanently
- Rate riskVariable — same as easy-access savings
- Amount you can holdAnnual subscription limit; withdrawals may use it up
- ProtectionHM Treasury backing, not FSCS
- Balance can fallNo
- Tax on prizesTax-free
- ReturnPrizes, not interest — can be zero in any month
- Amount you can holdCapped by the NS&I holding limit
- ProtectionFSCS, £120,000 per person per firm
- Balance can fallNo
- Tax on interestTaxable outside an ISA wrapper
- RateHighest of the four (see chart above)
- Emergency useNotice period or interest forfeit — wrong for tier one
Source: Financial Services Compensation Scheme, Deposit protection limits, effective 1 December 2025
Easy-access savings account
The default, and the right answer for most people and for the whole of most funds.
Open it somewhere other than your current account provider. The extra thirty seconds it takes to move money is enough friction to stop a Tuesday-evening impulse purchase and nowhere near enough to matter in a real emergency.
Then set a calendar reminder for eleven months after opening. Headline easy-access rates frequently include an introductory bonus that falls away after twelve months, and the 1.65% average above is what happens to people who never look again. Switching takes minutes; the reminder is what makes it happen.
Easy-access cash ISA
Interest inside an ISA is tax-free, permanently, and stays out of your Personal Savings Allowance. That allowance covers a set amount of savings interest each year for basic-rate and higher-rate taxpayers, at different levels for each; additional-rate taxpayers get none. The amounts are set by HMRC and change at fiscal events, so check the current Personal Savings Allowance on GOV.UK rather than trusting a figure quoted in an article. The rule does not depend on the number: once your total savings interest is likely to exceed your allowance, or if you are an additional-rate taxpayer, the ISA wrapper earns its keep.
There are two traps specific to using an ISA as an emergency fund.
The first is the annual subscription limit. There is a cap on how much new money you can put into ISAs in a tax year, so a large fund cannot simply move in at once.
The second is flexibility, and it catches people out badly. On a flexible cash ISA, money you withdraw can be paid back in during the same tax year without using up any more allowance. On a non-flexible one it cannot — withdraw £4,000 in an emergency and you have permanently spent £4,000 of that year's allowance to get it back. For a pot designed to be dipped into and refilled, flexibility is not a nice-to-have. Look for the word "flexible" in the summary box; if it is not there, assume it is not.
Households put a net £2.0 billion into ISAs in June 2026 alone, against £1.3 billion withdrawn from interest-bearing instant-access accounts (Bank of England, Money and Credit, June 2026). The wrapper is where the money is going.
Sharia-compliant savings accounts
Routinely missing from comparison articles, and they should not be. Sharia-compliant accounts from UK-authorised banks pay an expected profit rate rather than interest, because paying interest is not permitted under Islamic finance principles. The money behaves like a savings balance, and — the part that matters here — deposits are covered by the FSCS on exactly the same terms as any other UK bank: £120,000 per eligible person per authorised firm. Compare their expected profit rate against the easy-access rates on your shortlist the same way you would compare any two accounts. There is no reason to exclude them whatever your faith.
Premium Bonds
NS&I Premium Bonds are backed by HM Treasury rather than the FSCS, so the whole balance is protected up to the NS&I holding limit — a limit NS&I sets and occasionally changes, so check the current figure on the NS&I site rather than assuming.
Two structural points decide whether they suit you.
Access is in working days, not hours. NS&I publishes current cash-in timings; they are not instant. That is exactly wrong for the tier of your fund that exists to cover a boiler that failed this morning.
The advertised prize fund rate is a mean, and you are not the mean. The fund is paid out as prizes, including a small number of very large ones, and those pull the average up. The typical holder of a modest number of bonds therefore earns less than the headline rate — often nothing at all in a given month. The skew matters less the more bonds you hold, which is why Premium Bonds suit a large holding better than a small one.
They are a defensible home for the outer tier of a big fund, particularly for a higher-rate or additional-rate taxpayer. They are a poor home for the first £1,000.
Where not to keep it
Fixed-term bonds. Better rates — 4.30% against 1.65% on the Bank of England figures — but you either cannot access the money or you forfeit interest to do so. For the core of a fund, that defeats the purpose. For the outer tier, see the tiering section below.
Notice accounts. A 90-day notice account is not an emergency fund. Same logic: fine for the outer tier, never for the whole thing.
Stocks, funds or crypto. The value can fall, and it tends to fall during exactly the recessions that cause the job losses your fund exists to cover. You would be selling at the bottom to pay your rent. Not an argument against investing — an argument for keeping the two pots separate, because compound growth is a decade-scale mechanism, not a six-month one.
Cash at home. No interest, no protection, exposed to fire and theft. A small amount for a power cut is sensible; a fund is not.
Your current account. Too easy to spend, and it vanishes into your everyday balance so you never know whether you have a fund. It is also, on the Bank of England numbers, part of the 1.65% problem.
Tiering a larger fund
Once your fund is past a few thousand pounds, splitting it by how fast you would need each part works well. The first tier should be sized against the kind of expense that actually arrives without warning: the ONS uses an unexpected but necessary expense of £850 as its standard resilience question, and found around one in four adults in Great Britain said their household would be unable to pay it (Office for National Statistics, May 2026). A same-day tier of around £1,000 clears that bar with room to spare.
Tiering a £9,000 emergency fund
Worked example for a UK household with £1,500 of monthly essential outgoings
- Immediate — easy-access savings£1,00011%Same day. Covers the ONS £850 unexpected-expense test
- Core — easy-access or flexible cash ISA£5,00056%One working day. The bulk of the fund
- Outer — notice account or Premium Bonds£3,00033%Days to weeks. Buys the higher rate on money you are unlikely to need this month
The arithmetic on the outer tier: £3,000 earning 4.30% instead of 1.65% is about £80 a year more, before tax. Worth doing once the fund is large. Not worth doing on a £2,000 fund, where the same gap is worth about £53 and the notice period could cost you a payday loan. Do not over-engineer it — three accounts is plenty, and each extra one is another thing to forget about.
If your income is irregular, weight the immediate tier heavier. A freelancer on an irregular income faces a different shock from a salaried employee: not one big bill, but a month where the invoices do not land. The same applies to a single-income household, where losing one job is losing all of it.
How fast the money actually moves
The account's marketing says "instant access". That describes the terms, not the plumbing. Before you rely on it, check three things.
The transfer route. Most UK bank-to-bank transfers arrive within seconds over Faster Payments. Some providers, particularly smaller building societies, still process withdrawals in batches — which can mean next-working-day arrival, and nothing at all over a weekend.
Your own transfer limits. Banks apply per-transaction and daily payment limits that vary widely by provider and by how you make the payment. A limit you never notice on a £200 transfer becomes a real problem when you need to move £4,000 in one go.
Whether the nominated account is fixed. Many savings accounts pay out only to one pre-registered current account. If that is an account you have since closed, you have a problem precisely when you can least afford one.
The test costs nothing: move £1 out, time it, move it back. Do it the week you open the account.
Choosing the account
- Check the FSCS licence, not the brand name — especially across two brands you assume are separate
- Confirm whether it is a bank or an e-money firm. Safeguarded is not FSCS-protected
- Check whether the headline rate includes an expiring bonus, and diarise the expiry
- Read the withdrawal terms. Some accounts labelled "easy access" cap penalty-free withdrawals per year, or cut the rate if you exceed them. The cap varies by product and sits in the summary box
- If it is an ISA, check whether it is flexible before assuming you can refill it
- Run the £1 test on transfer speed and nominated accounts
When this does not work
Two honest limitations.
If you have expensive debt, the maths changes. Interest on a credit card or an overdraft runs far above anything a savings account pays. Beyond a small buffer, money is usually better going at the debt — with the caveat that clearing your buffer entirely tends to push the next unexpected bill straight back onto the card. Our UK debt guide covers the sequencing.
If you have nothing to put in yet, the account choice is not your bottleneck. More than one in three adults in Great Britain told the ONS in May 2026 that they expected to be unable to save anything at all over the following twelve months (Office for National Statistics, May 2026). Choosing between a 4.30% bond and a 1.65% account is not the problem to solve first. Finding the monthly amount is — and the quickest source is almost always recurring charges you have stopped noticing. A subscription audit and a round of bill negotiation between them usually free up more than people expect, and paying yourself first is what stops the freed-up money quietly disappearing again.
Frequently asked questions
Can I keep my emergency fund in a cash ISA?
Yes, provided it is an easy-access cash ISA rather than a fixed-rate one, and ideally a flexible one. Flexibility means money you withdraw can be replaced in the same tax year without using up more of your annual allowance. On a non-flexible ISA, an emergency withdrawal permanently consumes that slice of your allowance.
Is the £120,000 FSCS limit per account or per bank?
Per eligible person, per authorised firm — not per account. Three accounts at the same bank share one £120,000 allowance. Two different brands that share a single banking licence also share one allowance, which is the trap. A jointly held account has two eligible depositors, so each holder brings their own £120,000 of cover to their share.
Are Premium Bonds safe for an emergency fund?
The capital is safe — backed by HM Treasury rather than the FSCS, up to NS&I's holding limit. The problems are access and return. Cashing in takes working days rather than hours, and the return is a prize draw that can pay nothing in a given month. They work as the outer tier of a large fund, not as the whole of a small one.
How much of my emergency fund needs to be instantly accessible?
Enough to cover the kind of bill that arrives without warning. The ONS benchmarks household resilience against an unexpected but necessary expense of £850, and around a quarter of adults in Great Britain said in May 2026 they could not meet it. A same-day tier of roughly £1,000 clears that. One working day is fine for the core, and anything above your target can accept a notice period in exchange for a better rate.
Keep the number visible
Wherever you put it, the fund only works if you know what is in it and what your target is. Recalculate the target whenever your rent, income or household changes — the emergency fund calculator takes two minutes, and the savings goal calculator tells you how long your chosen monthly amount will actually take. If you have just used the fund, rebuilding it is the priority until it is whole again. Our full emergency fund guide covers target-setting in more depth.
Know your target, watch it grow
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