Lesson 4 of 7
We're available whenever the markets are open, from Sunday night through to Friday night.
For anyone in the UK thinking about putting money into markets, the emergency fund comes first. In an emergency fund, the goal is to keep accessible cash ready so a sudden expense does not force you to sell investments at the wrong time.
A boiler breaks. A job ends earlier than expected. A car fails its MOT badly. These costs do not wait for your investments to recover.
If you have no accessible cash, you face a choice: borrow at whatever rate you can get, or sell investments to cover the bill. Selling investments when you need the money, rather than when the time is right, is called forced selling. It turns a temporary paper loss into a permanent one. It locks in whatever price the market offers that day.
An emergency fund removes that pressure. It means an unexpected bill is just a bill, not a reason to exit a position early. The rest of your plan has a better chance of staying on track because this part already does.
As the graph below shows, 71% of UK adults held some form of savings product in 2024.
What is an emergency fund? An emergency fund is cash set aside for genuine, unexpected, essential costs. It covers things you cannot plan for and cannot ignore, such as a broken appliance that heats your home, a sudden drop in income or an urgent repair.
It is not a holiday fund, savings for a car upgrade or money you expect to grow. The whole point is that it stays liquid and accessible. You do not touch it unless the alternative is worse.
The boundary matters. If you treat it as a general savings pot, it may not be there when you actually need it. If you invest it, it can fall in value at the exact moment you need to withdraw. An emergency fund earns its place by doing one job: being available.
A common guideline is to hold three to six months of essential outgoings, rather than total spending. Essential outgoings are the costs you cannot stop paying without immediate consequences, such as rent or mortgage, utilities, food, transport to work, insurance and minimum debt payments.
Where you sit in that range depends on your circumstances. Someone with a stable salary and shared household income might be comfortable at three months of emergency savings. Someone self-employed, or the sole earner for a household, might want six months or more. The number is yours to decide, but the range gives you a frame.
An easy-access or instant-access savings account is often used for emergency funds because the money can usually be reached quickly. The priority is being able to access it within a day or two, not locking it away and not exposing it to market movement. Keeping it separate from your everyday spending account can also reduce the risk of accidental spending.
This is not money you are trying to grow. It is money you are keeping safe and available.
Investing works best over time. If you might need the money back in the near term, it is usually better kept out of the market.
This is also about financial resilience, meaning your ability to absorb a financial shock without having to make rushed decisions. An emergency fund can help you avoid selling investments early and gives your invested money more chance to stay invested through short-term falls. As shown in the graph below, emergency savings are often associated with a higher level of financial well-being.
[Insert financial well-being graph]
Take someone whose essential monthly outgoings come to £1,500. This amount would cover their rent, bills, food, transport and insurance costs as a baseline.
A three-month emergency fund would be £4,500. A six-month fund would be £9,000. An emergency fund calculator simply multiplies the monthly figure by the number of months. While the maths is not complicated, it can take discipline to build up this figure and let it be.
Now imagine two people, both facing a £2,000 repair bill out of nowhere.
Person A has £5,000 held separately in an easy-access savings account. They transfer £2,000 to cover the bill. Their investments stay untouched, and they replenish their emergency fund over the next few months.
Person B has no cash buffer. Their main option is to sell £2,000 of investments. The market is down 15% from when they bought. They lock in that loss to pay the bill. The money is gone, and the position is closed.
Same bill. Very different outcomes.
If you are deciding how to build an emergency fund, use a simple process.
Start by listing your essential outgoings. Be honest about what you cannot stop paying. Add them up. That is your monthly figure.
Decide where you want to sit in the three-to-six-month range. Consider your job stability, whether you have dependants and how quickly you could replace your income if you had to.
Work out how much you can realistically set aside each month. If the target feels far away, that is normal. A smaller monthly amount over time still gets there.
Keep the money separate from day-to-day spending and treat it as unavailable unless the situation is genuine.
Once you have a buffer in place, you may find it easier to invest for longer-term goals because an unexpected bill is less likely to force a sale.
If you include every subscription and every discretionary purchase, the number can look impossible. The fund is for essentials. In a real emergency, you would often cut back on non-essentials first. Base the target on what you cannot cut.
Money in the market can fall in value. An emergency fund that drops right before you need it is not serving its purpose. Keep this money in accessible cash so the balance is less exposed to market swings when timing matters.
A weekend away is not an emergency. A sale is not an emergency. If you dip into the fund for non-essentials, it may not be there when something genuinely unexpected lands. Define what counts before you need to decide under pressure.
An emergency fund is accessible cash for genuine unexpected essentials, not a savings pot for goals or growth.
Aim for roughly three to six months of essential outgoings, based on your own circumstances.
Keep it separate and in cash, not invested, so the value is more stable when you need it.
It comes before investing because it can protect your invested money from forced selling.
Build it in steady monthly amounts rather than waiting for a windfall.
An emergency fund is cash held separately for unexpected, essential costs. Emergencies include things like a boiler replacement, sudden job loss or an urgent repair you cannot delay. A holiday, a new phone or a planned purchase does not qualify. The test is whether the cost is both unexpected and unavoidable.
A common range is three to six months of essential outgoings. Essential means rent, utilities, food, transport, insurance and minimum debt payments. Where you sit in that range depends on your circumstances: job stability, dependants and how quickly you could replace your income. If you are asking how much you should have saved for an emergency, this range is a practical starting frame rather than a fixed rule.
An easy-access or instant-access savings account is often used. The priority is availability, not growth. You want to reach the money quickly without penalties or market risk. Keeping it separate from your everyday account can help it stay untouched until you genuinely need it.
For many beginners, building an emergency fund before investing is a sensible sequence. Investing works best over a longer horizon. If an unexpected cost forces you to sell investments early, you may lock in a loss. The emergency fund can remove that pressure so your invested money is less likely to be used for short-notice bills.
