Enough that a broken transmission stays a broken transmission instead of turning into a balance you carry for two years. There's no single right number — it depends on how steady your income is, how many people depend on it, and what it would actually cost you to get back on your feet.
What It Is Actually For
An emergency fund is a shock absorber. It isn't an investment and it isn't supposed to grow into something impressive. Its whole job is to be boring and available on the day something breaks.
That's why it belongs somewhere you can reach it quickly, not somewhere you'd have to sell something to get at.
Steady Income Versus Lumpy Income
Someone with a predictable salary and an employer behind them needs a thinner cushion than someone self-employed. If your income arrives in a few large pieces a year, your cushion has to carry you across the gaps as well as the emergencies.
Ranch and small-business families almost always need more set aside than the general advice suggests, because a bad year and a broken truck can show up in the same month.
Build It Before You Optimize It
The common mistake is waiting until you can do it properly. A small cushion that exists beats a large one you're still planning. Start with something, automate it, and raise it when you can.
We don't publish a target multiple here on purpose — the honest answer depends on your situation, and that's worth a conversation.
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