Emergency funds: what they are and how much to keep

An emergency fund is money you keep aside for something you did not plan for but need to deal with¹. The classic examples are an essential appliance breaking, an urgent car repair, or an unexpected drop in your income¹. It is kept in cash, somewhere you can reach it quickly, and it exists so that a shock becomes an inconvenience rather than a crisis that pushes you into borrowing.

The size of the fund is a personal decision, based on what works for you¹, but the common guidance is consistent: three to six months of essential outgoings if you are working, and one to three years of living expenses if you are retired¹. This page explains what that means in practice: how to work out your own target, where to keep the money, how to build it up from a small starting point, and what help exists if your savings run out entirely.

What an emergency fund is for

An emergency fund is money you keep aside for something you did not plan for but need to deal with¹. That definition does the heavy lifting: the money is not for a holiday, not for a new phone you have been eyeing, and not for bills you know are coming. It is for the day the boiler fails, the car needs an urgent repair to get you to work, or your hours are cut.

The point of the fund is that it separates the shock from the money. Without savings, an unexpected cost has to be met by borrowing, by missing a bill, or by asking family, and each of those has consequences that outlast the emergency itself. With savings, the same cost is absorbed and then replaced over time.

It also helps to keep an emergency fund apart from savings that have a purpose. NS&I draws the distinction neatly: if an emergency fund is for "just in case", your possibilities pot is for "just because"⁶. Money you are saving for a holiday or a car can be spent on that thing without guilt; money in the emergency fund is spent only when the tests in the next section are met. Keeping them in separate accounts makes the boundary real, and the question of whether emergency savings belong in their own account is covered in detail on our page about a separate emergency account.

What counts as an emergency, and what does not

Guidance from NS&I sets out three tests for a genuine emergency cost: it is unexpected and you could not reasonably plan for when it would happen; it is hard to put off; and you need to deal with it quickly¹. A burst pipe passes all three. A sale on flights fails the first, and a car service you knew was due fails the second.

Some costs sit in a grey area, and the tests help there too:

• Known but irregular bills, such as car servicing or an annual insurance premium, are not emergencies. They belong in your budget, and our page on budgeting for annual and irregular bills covers how to spread them.
• Birthdays and Christmas are predictable. Debt charity StepChange notes that in its clients' budgets there is an allocated amount for "sundries and emergencies" which can be set aside to cover expenses such as birthdays and Christmas⁷, which is a reminder that planned celebrations come out of the budget, not the emergency fund.
• Discretionary spending, such as nights out, belongs in its own part of the budget, so that a good month does not quietly drain the fund.

Insurance interacts with this question too. Home emergency insurance exists for exactly the kind of sudden household failure an emergency fund might otherwise pay for, but the Financial Ombudsman Service notes that most home emergency policies are only meant to cover stopping the emergency, and it doesn't usually cover any damage the emergency has caused⁸. So even insured households commonly keep some cash for the gap: the excess, the consequential damage, or the emergency the policy excludes.

The public support system draws the same line. Under the Scottish Welfare Fund's statutory guidance, in the case of an emergency only living expenses should be awarded, and in the case of a disaster both living expenses and household goods may be awarded⁹. The distinction the state makes between an emergency and a disaster is a useful one for households too: an emergency interrupts your income or imposes an urgent cost, while a disaster destroys things that must be replaced.

How much to keep: three to six months of essential outgoings

The most common guidance, repeated across official and independent sources, is three to six months of essential outgoings¹. Which? describes it as "a common rule of thumb is to keep three to six months' worth of essential expenses in an easy-access account"⁴, and its guidance on saving versus investing states the generally accepted rule as having "at least three months' worth of essential outgoings saved in cash for emergencies"³. StepChange, the debt charity, tells its readers to aim for a fund covering at least three months of living expenses¹⁰, and Which?'s investing guidance puts the figure at about three months' worth of expenses¹¹.

The sources differ only in emphasis. The lower end of the range, three months, appears in every source; the upper end, six months, appears where the writer is thinking about how long a job loss might realistically last before income recovers. NS&I, quoting government-backed MoneyHelper guidance, gives the full three to six months range¹. Nothing in the guidance makes six months a requirement rather than a comfort: the amount is a personal decision, based on what works for you¹.

What the range does not mean is three to six months of your salary. The target is built on essential outgoings, which are usually lower than income, because in an emergency you would cut back on everything non-essential. The next section covers how to work that figure out.

Working out your essential outgoings

Essential outgoings are the payments you must keep making even if your income stopped tomorrow. StepChange's guidance on county court judgments describes the standard method: start by working out your disposable income, which is what you have left over once you have paid for your essential living costs such as rent or mortgage, council tax, food, utility bills and transport costs¹². Those categories are the backbone of the calculation.

That list is a starting point, and most households add to it: insurance premiums that protect something essential, minimum debt payments, childcare needed to work, and prescription or travel costs for health. Business Debtline's household budget guidance adds a caution about the softer categories: some outgoings are more flexible, and how much you spend on food, clothing or phone calls will be different depending on your circumstances, so you need to think carefully about the amounts you put in your budget for outgoings like these¹³. In an emergency-fund calculation, the honest approach is to budget for the reduced level of spending you would actually adopt in a crisis, not your current comfortable level.

Two groups need to adapt the method:

• Self-employed people and those on zero hours contracts should build the budget on the lowest realistic monthly income and put extra money into a reserve for low income months, an approach StepChange describes as a "Hill and Valley" fund¹⁴. Our page on budgeting when your income varies covers this in full.
• Households with irregular tax bills should set aside the estimated amount worked out for when the next bill arrives¹³, because a tax demand is not an emergency if it was foreseeable.

Once you have a monthly essentials figure, multiply it by three for the minimum target and by six for the fuller one. The Investment Association's guidance for new investors states the underlying principle plainly: keep an appropriate amount of cash in a bank or building society so you can access it quickly for unexpected outgoings or emergencies¹⁵. If you do not yet have a budget, our guide to how to make a budget walks through it step by step, and free budget planners and apps can do the arithmetic for you.

Working or retired: why the target changes

The three to six months rule assumes you are earning, and that the emergency it guards against is a gap in income. Turn2us lists exactly that situation among the triggers for crisis support: facing a gap in your regular income due to redundancy or a change at work¹⁶. Three to six months is the rough period a household needs to find new work, or for benefits and any new income to replace the old.

For retirees the calculation changes completely, because there is no salary to replace. Which?'s guidance on pension withdrawals gives a different target: "If you are retired, aim for one to three years"². The reason is that a retired person's income comes from pension pots and investments that can fall in value, and selling assets after a market fall locks in the loss. A larger cash reserve means a retiree can wait out a fall rather than sell into it.

The difference between the two targets is worth noticing: a working household's fund is measured in months of outgoings, while a retired household's is measured in years, so the same monthly essentials figure produces a much larger cash target for someone who has stopped work. MoneyHelper offers a free tool to build a retirement action plan, matching you with tailored guidance and next steps¹⁷, and our pensions section covers how retirement income is built.

Start small: a first goal of £100 to £300

Three to six months of essential outgoings is, for most people, a figure measured in thousands of pounds, and it is not built in a month. The practical approach is to work in stages, and the first stage is deliberately small: a first goal of £100 to £300, built up gradually, is enough to absorb the most common small emergencies such as a broken appliance or an urgent repair without borrowing.

The stages matter because each one changes what a shock means. With nothing saved, a £150 repair is a problem that has to be solved by borrowing or by missing a bill. With the first goal met, the same repair is simply paid. With three months of essentials saved, a job loss becomes survivable rather than catastrophic. The amount in the fund is a personal decision, based on what works for you¹, so the milestones can be adjusted to your circumstances: someone with a reliable second income may be comfortable stopping at the lower end, while a sole earner with a mortgage may want the full six months.

If you are starting from a low income, the page on saving money on a low income covers where small amounts can be found, and cutting household bills frees up money that can be redirected to the fund.

Where to keep it: easy access savings or a cash ISA

The fund needs to satisfy two conditions at once: it must earn something, and it must be reachable on the day the emergency happens. The Consumer Council for Northern Ireland notes there are a wide range of savings accounts including ISAs, instant access and fixed term options¹⁹. For emergency money, instant access (usually called easy access) is the type that fits, because fixed term accounts and fixed rate cash ISAs are designed to hold money still: NS&I's ISA guidance states that with a fixed rate cash ISA "you usually can't withdraw money during the fixed term without penalty, unless the product rules allow it"⁵.

A cash ISA works as an emergency fund home as long as it is the easy access kind. The interest is tax free, and from 6 April 2027 the rules will tighten in one respect: transfers from non-cash ISAs into cash ISAs will not be permitted²⁰. That matters if you hold stocks and shares ISA money you were thinking of moving into a cash ISA as your emergency fund, because that route will close.

The other half of the question is separation from your current account. Money sitting alongside your spending money gets spent, because there is no boundary. Our page on whether emergency savings belong in a separate account covers the arguments, and the savings section and ISA section explain the account types in full.

Building it up with a regular standing order

The most reliable way to build the fund is to make the decision once rather than every month. NS&I describes the method: setting up a regular standing order to pay your account each week or month, depending on how often you want to put money away²¹. The money leaves on payday, and what is left is what you live on.

The frequency is worth matching to how you are paid. A weekly standing order of £10 suits someone paid weekly or who finds small commitments easier to keep; a monthly one suits someone salaried. Business Debtline makes the same point about bill paying generally: sometimes it is easier to cope if you open a separate bank account, pay regular amounts into it, and set up direct debits or standing orders so that regular payments are automatically taken out¹³. The same automation that keeps bills on track keeps savings growing.

Business Debtline's guidance adds the underlying principle: if you have money left over after meeting your essential living costs, it might be a good idea to pay a regular amount into a savings account¹³. The amount can start small and rise when your circumstances improve, and our page on how to start saving each month covers the habit in detail.

An emergency fund comes before investing or overpaying a mortgage

Once the fund exists, it is the foundation for the next financial decisions. Which?'s guidance on saving, investing and overpaying states the generally accepted rule: have at least three months' worth of essential outgoings saved in cash for emergencies before moving on³. Its investing guidance is blunter still, telling beginners that before investing they need an emergency fund of about three months' worth of expenses, to cover any emergencies¹¹.

The reason is the risk of being a forced seller. Investments go down as well as up, and a mortgage overpayment, once made, cannot be withdrawn. If the money you need for an urgent repair is tied up in either, you may have to sell investments at a loss or borrow at short notice, which can cost more than the investment ever earned. The Investment Association puts the principle in its guidance for new investors: keep an appropriate amount of cash in a bank or building society so you can access it quickly for unexpected outgoings or emergencies¹⁵.

With the fund in place, the choice between investing and overpaying the mortgage is a genuine one, and our comparison page on overpaying the mortgage or investing sets out how each behaves. The wider question of what to sort out first is covered in the order to sort out your finances.

Saving for emergencies while paying off debts

Debt changes the arithmetic but not the logic. Scope, the disability charity, warns of what happens when emergency costs go unpaid: emergency debts are usually priority debt that you have been unable to pay or ignored, and these can result in eviction, rent arrears or having your gas or electricity cut off²³. Priority debts such as rent, mortgage arrears, council tax and energy bills come before any saving, because the consequences of missing them are severe.

Alongside priority debts, a small cash cushion is still worth building, because without one every unexpected cost pushes you back into borrowing. StepChange's guidance on saving for an emergency is aimed at exactly this group, telling readers to aim for a fund covering at least three months of living expenses¹⁰. The practical balance, a small starter fund while a repayment plan runs, is set out in our comparison of an emergency fund or paying off debt first, and free debt advice is available from charities including StepChange and Business Debtline.

One specific trap deserves a mention. Prepayment meter users can run out of credit, and mygov.scot notes that emergency credit might be available on your meter automatically, or you might have to ask your supplier for it, and that you could get extra emergency credit if you're on the Priority Services Register²⁴. Emergency credit is a loan against your next top up: you'll need to pay it back next time you top up²⁴. It is a stopgap, not a substitute for a cash fund, and relying on it repeatedly is a sign that free debt advice would help.

After using the fund: rebuilding it

Using the fund is what it is for, and the job afterwards is to refill it. The same three tests apply to the rebuild as to the original build: the fund exists for costs that are unexpected, hard to put off, and that you need to deal with quickly¹, so once the emergency has passed, the regular standing order resumes²¹.

Restarting is easier if the payment was never fully cancelled. Reducing a standing order to a small amount keeps the habit alive while the budget recovers, and it can be raised again later. Business Debtline's guidance applies here as at the start: if you have money left over after meeting your essential living costs, it might be a good idea to pay a regular amount into a savings account¹³.

It is also worth rechecking the target rather than rebuilding to the old one. If the emergency revealed a cost you had not budgeted for, or your essential outgoings have changed, the three to six months figure should be recalculated from the new numbers. And if the emergency was caused by something insurable, such as a household failure, it may be worth checking whether home emergency insurance would cover the next one, bearing in mind the ombudsman's note that most such policies are only meant to cover stopping the emergency and don't usually cover consequential damage⁸.

When savings run out: crisis help across the UK

Sometimes the emergency is bigger than any fund, and each UK nation has a scheme of last resort. These are grants or awards, not loans, aimed at people who cannot pay for essentials.

In England, the Crisis and Resilience Fund is aimed at low income households and people who are vulnerable or cannot pay for essentials¹⁶, and Turn2us describes it as support for people in England who are on a low income or facing a crisis²⁵. The government has described it as a "£1bn Crisis and Resilience Fund, which will act as a genuine safety net to prevent families from falling into crises"³⁰.

In Wales, the Discretionary Assistance Fund can give an Emergency Assistance Payment if you need money quickly³¹. Eligibility requires that you be in extreme financial hardship and experiencing an unexpected crisis, and that you have no other money, for example savings²⁷. Shelter Cymru describes the EAP as a small, short-term grant available to cover the immediate emergency needs, awarded towards essential needs such as food, gas, electricity, essential clothing and emergency travel²⁶. Our page on money help in Wales covers the full range of Welsh support.

In Scotland, Crisis Grants come from the Scottish Welfare Fund, and the statutory guidance is clear that it is not a requirement to be in receipt of an income related benefit to be eligible for assistance²⁸. In an emergency, only living expenses should be awarded⁹. Young people with experience of care may also be able to get help from the Aberlour Urgent Assistance Fund, whose grants are one-off payments to help with living costs or in an emergency or crisis³². See money help in Scotland for the wider picture.

Universal Credit claimants everywhere can apply for a Budgeting Advance to help pay for emergency household costs, or for help getting a job or staying in work²⁹. And in situations of domestic abuse, some banks have specific help: TSB has an emergency flee fund that can provide money to help you leave an abuser³³, which Which? reported was launched in December 2022 to help people who are fleeing abusive relationships³⁴. Our page on free help if someone pressures you over money covers that support, and free money guidance lists where impartial help can be found at no cost.