Key takeaways
- Size the fund in months of essential spending. Income is the wrong yardstick because you do not have to replace all of it.
- Essential means the bills that arrive whether or not you are working. Rent, food, utilities, insurance, minimum debt payments, transport.
- Three months suits stable dual income households. Six or more suits variable income or a single earner.
- The fund exists to stop a routine shock turning into an expensive balance, so it has to be reachable within days.
Months, not a round number
The common advice is to save three to six months. The part people skip is three to six months of what.
Not income. If you lose your job you stop commuting, you stop saving into retirement, you stop paying tax on income you are not earning. Sizing the fund against gross pay overstates the target by a wide margin and makes the goal feel hopeless.
What counts as essential
Write down the bills that keep arriving when income stops. Housing, food, power, insurance, transport, minimum payments on any debt. That total is your monthly essential figure.
Streaming subscriptions and restaurant meals are not in it. They are the first things to go in the month you actually need this money, so counting them inflates a target you are already struggling to reach.
How many months
The right multiple depends on how quickly your income could stop and how quickly it could restart.
Two stable salaries in different industries is a resilient position, and three months is defensible. One income supporting dependents, or income that arrives as commission or contract work, calls for six or more. A specialist role that takes a long time to replace calls for more again.
Where it lives
Somewhere boring and reachable within a few days. This money is not an investment, and the temptation to make it work harder defeats the purpose. The return on an emergency fund is the high interest debt you did not take on, which is a better return than anything you would have earned reaching for yield.
Sources
- The three to six month guideline is long standing conventional guidance rather than the output of a single study. Treat it as a starting point to adjust.
- Federal Reserve, commercial bank interest rates on credit card plans, for the cost of the debt an emergency fund is designed to avoid.
Open Spending. Mark expenses essential and the coverage badge, target, and funding date all compute from your entries.
Open in Capital Allocation →