Emergency Fund Calculator

Three to six months of what, exactly

The familiar rule is ambiguous in a way that changes the answer by a lot. It means months of essential spending — housing, food, utilities, transport, insurance, minimum debt payments — not months of income and not months of your current total spending.

The gap matters. Someone earning a comfortable salary might spend a third of it on things they would drop immediately in a crisis. Sizing a fund against income rather than essentials can easily set a target 40% too high, which delays every other financial goal for no gain in safety.

What actually sets your number

The range exists because the right answer depends on how long you would be without income and how volatile that income is:

• Job security and how long a replacement takes. Senior and specialised roles take longer to replace, so the same person may need six months where a generalist needs three.
• One income or two. A household with two earners in unrelated fields is far better insulated than one with a single earner — or two in the same industry.
• Self-employment. Variable income needs a buffer for the ordinary troughs before it covers any emergency at all.
• Dependants and fixed obligations. Costs that cannot be cut quickly push the target up.
• Other safety nets. Statutory redundancy or unemployment cover differs enormously between countries, and where it is generous the private buffer can be smaller.

Where to keep it

Two requirements, in order: you can reach it within a day or two, and its value does not move. That rules out anything invested in shares, however strong the long-run case, because the moment you need this money is disproportionately likely to be a moment when markets are down.

It does not rule out earning something. An instant-access savings account at a competitive rate meets both tests, and leaving the money in a current account paying nothing is a quiet ongoing cost. Notice accounts and fixed terms are a poor fit no matter the rate — the point of the fund is that it is there on the day you need it.

Fund first, or clear the debt first?

The usual answer is a small starter fund, then the expensive debt, then the rest of the fund. Paying high-interest debt is a guaranteed return that no savings account matches, so there is little sense in holding a large cash balance against it — but with no buffer at all, the next unexpected bill goes back onto the card, and the balance never falls.

A month of essentials is enough to break that cycle. Once the costly debt is gone, build the rest.