How much emergency fund is actually enough

Three months of what

The usual advice is three to six months of expenses, which sounds precise until you try to use it. Three months of everything you spend, or three months of what you could not stop spending?

Use the second. An emergency fund covers the months where income stops, and in those months you are not buying concert tickets. Count housing, utilities, food, insurance, transport, minimum debt payments and childcare. Leave out the discretionary half.

A worked example

A household spends $7,200 in a typical month. Stripping out dining, subscriptions, shopping and travel leaves $4,950 of genuinely fixed costs.

Three months of the full figure is $21,600. Three months of the survivable figure is $14,850. The second number is both more accurate and considerably less discouraging.

Adjust for how you earn

Two salaried incomes at a large employer are unlikely to stop in the same week. Three months is defensible.

One income, or two that depend on the same industry, argues for six. Self-employed income that arrives in lumps argues for six to nine, because a quiet quarter is a normal event rather than an emergency.

The variable to weigh is not just probability but replacement time. A specialised role in a small market takes longer to replace, and the fund has to cover the search.

Get to one month first

The gap between zero and one month of costs removes more stress than the gap between three and six. It is the difference between a broken boiler being a crisis and being an annoyance.

Build to one month, then continue while directing anything above it toward higher-rate debt. Cash sitting at 4% while a card charges 22% is a losing trade past the first month.