What amount to aim for
The most widely used benchmark is three to six months of running costs. The point is not to cover three to six months of salary, but your unavoidable spending: rent or mortgage, energy, food, insurance, transport, essential subscriptions. That distinction often changes the figure substantially.
Where you land within that range depends on your stability. An employee on a stable contract with no dependants can aim at the lower end. Self-employment, variable income, a household with children or owning your home all justify aiming higher: the unexpected is both more frequent and more expensive.
The exact figure matters less than having one. An emergency fund of 2,000 actually built protects you far better than a 10,000 target never reached. Start by working out your real monthly running costs, multiply by three, and take that as your first target.
Where to keep it, and why it must stay available
An emergency fund has one requirement: being available immediately, with no fees and no delay. That is what sets it apart from every other form of saving. The day the boiler fails or the car will not start, the money has to be reachable within hours.
That rules out anything that locks the money away or whose value can fall at the wrong moment. The aim is not to grow this money but to be able to count on it with certainty. It is insurance, not an investment, and it needs to be treated as such.
Keeping it separate from your current account remains the most useful precaution. In the everyday account the money is invariably absorbed by ordinary spending, with no conscious decision. In a dedicated account it stays reachable but stops being confused with the month's available money.
How to build it without taking years
What works best is an automatic transfer set for payday, before any spending. As long as saving depends on what is left at month end, it stays variable and often comes to nothing. Automated at the start of the month, it becomes a fixed cost like any other and the rest adjusts around it.
Start with an amount you do not feel, even if it looks modest. A transfer of 50 kept up for twelve months beats one of 300 abandoned in the second. You can always raise it after a pay rise or once a loan ends.
Finally, set milestones rather than one distant target. A first milestone at one month of costs, a second at three, a third at six. Each one reached is real protection and a point of motivation, where a single target of several thousand discourages before you even begin.