How to Budget for Irregular Bills Like Car Repairs and Medical Costs

A $400 car repair feels like an emergency the first time it happens. The second or third time, it's not really a surprise anymore - it's a category that needed its own buffer, funded before the bill showed up.

Predictable categories, unpredictable dates

You can't know the exact date the car will need a repair or a medical bill will arrive. You can know, with near certainty, that both will happen again. Treating every occurrence as a fresh emergency, instead of a known category with an unknown date, is what makes them keep catching a budget off guard.

Building a category-specific buffer

Instead of one catch-all emergency fund covering everything, a separate buffer for each irregular category keeps the money earmarked for the kind of expense that's coming, even without knowing when:

This is the same underlying idea as a sinking fund for predictable annual expenses - money set aside for something known to be coming, just without an exact date attached.

Sizing the buffer to actual risk

How large a buffer needs to be depends on the real risk behind it - an older car or a chronic condition carries more exposure than a newer car under warranty or strong insurance coverage. There's no single number that fits every situation, since the right size varies with what's actually being covered.

MoneyFlow lets you set up dedicated savings goals for exactly this kind of category-specific buffer, tracked separately from a general emergency fund, so each one can be sized to its own exposure.

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