by Youssef El Beqqal · August 19, 2026
How to Budget for Irregular Bills Like Car Repairs and Medical Costs
TL;DR
Car repairs and medical costs are irregular in timing but not in inevitability - they will happen, just not on a fixed schedule. Setting aside money toward a category-specific buffer, rather than treating each one as a fresh emergency, is what actually accounts for them.
Car repairs and medical costs never show up on a schedule, which is exactly why they're usually treated as emergencies. They're irregular, not unpredictable - the difference matters more than it sounds.
Irregular isn't the same as unforeseeable
You can't predict exactly when the car will need a repair or when a medical bill will show up, but you can predict, with confidence, that both will happen at some point. Treating every occurrence as a fresh emergency - instead of an inevitable, just-not-yet-dated expense - is what makes them feel like they keep catching you off guard.
Build a category-specific buffer, not a generic one
Rather than one catch-all emergency fund for everything, a car-repair buffer and a medical-cost buffer, funded gradually, mean the money is already earmarked for exactly the kind of expense that's coming - even without knowing the date. This is the same underlying idea as a sinking fund for predictable annual expenses - save ahead for something you know is coming, just without an exact date.
Adjust the buffer size to your actual risk
An older car or a chronic condition means a bigger buffer is warranted; a newer car under warranty or excellent insurance coverage means a smaller one is reasonable. The size should match your real exposure, not a generic rule of thumb.
MoneyFlow lets you set up dedicated savings goals for exactly this kind of category-specific buffer, tracked separately from your general emergency fund.
