Short answer
How much should I save before investing anything?
Enough cash that an ordinary setback does not force you to sell an investment or borrow expensively. For most households that means between three and six months of essential spending, held somewhere you can reach within a day.
If you are starting from zero, do not wait for the full figure. A first thousand covers the majority of ordinary shocks and takes four to ten months at realistic amounts. After that, expensive debt comes next, and investing can begin alongside finishing the buffer rather than after it.
Sizing it in months of essentials
The usual phrase is three to six months of expenses, and the word expenses ruins it. In a genuine emergency you are not funding a normal month, you are funding rent, food, utilities, transport, insurance and minimum debt payments. That is a much smaller and much more useful number.
| Monthly essentials | Three months | Six months |
|---|---|---|
| $1,500 | $4,500 | $9,000 |
| $2,000 | $6,000 | $12,000 |
| $2,500 | $7,500 | $15,000 |
Where you sit in that range is not about temperament. It is about how fast your income could be replaced and how many people depend on it. Stable salary in a field with constant vacancies, nearer three. Self employed, variable income, or one wage supporting a household, nearer six or beyond. Working out your own essentials figure is the job of a spending record, and it takes one evening.
Why this comes before investing at all
Because invested money can be worth less on the exact day you need it, and the days households need money unexpectedly have an uncomfortable habit of clustering with the days markets are down.
Without a buffer, a broken gearbox becomes a sale at whatever price is on offer that week. That converts a temporary decline into a permanent loss, which is the one outcome the arithmetic cannot repair. It is also how people conclude that investing did not work for them, when what did not work was the order.
The two stage version, if you are at zero
Waiting for six months of essentials before investing anything can mean waiting four or five years, and that is a genuine cost given what early years are worth. The common compromise runs in four steps.
- A first thousand. At 250 a month this takes four months, at 100 a month it takes ten. It covers most ordinary shocks and stops the next surprise landing on a credit card.
- Expensive debt, cleared hard. A balance at 18 percent doubles in about four years if untouched, and removing a guaranteed cost of that size beats any uncertain return.
- The buffer completed, to your three to six month figure.
- Investing, which in practice often begins during step three rather than after it.
The detail on sizing, location and what counts as an emergency is in how to build an emergency fund from scratch.
Related questions
Can I count a credit limit as part of the buffer?
A credit limit is access to money, not money, and it can be reduced by somebody else at exactly the moment your circumstances change. It also charges a rate no investment reliably beats. It is a last resort rather than a plan.
Where should the buffer be kept?
Somewhere reachable within about a day, where the amount cannot move, and ideally slightly inconvenient to spend from. A separate account without a card attached satisfies all three. Interest rate is the fourth consideration, a long way behind the first three.
What if my job is very secure?
Then the lower end of the range is defensible, because the buffer is sized against how quickly income could be replaced. It does not go to zero, because job loss is only one of the events it exists for.
The figures here are illustrative multiples used to show a method, not targets for any particular household. This page does not know your income, your obligations, your job security or the rules where you live.