How much should you actually budget for maintenance reserves on a rental property?

Question

Every rental property needs a maintenance reserve. The question is how much.

A general rule in Chicago's south suburbs: budget 8-10% of gross rent annually for routine maintenance, plus a separate capital reserve for major systems. Roof, furnace, water heater, appliances, all have a lifespan. When they hit zero, you need cash ready.

Two accounts, two purposes: a maintenance reserve you fund monthly from rent, and a capital reserve you size at acquisition based on system ages. Never mix them. A burst furnace in January is not a surprise if you have been treating CapEx as a known cost since closing.

Owners who treat the rent check as pure profit eventually face a repair bill that wipes out two years of cashflow in a weekend.

What do you budget for maintenance on your rentals? Percentage of rent, per-unit dollar figure, or something else?

Mike Fisher, M Property Group LLC. Invested in Chicago-area real estate since 1991.

Leo Stein · Answer

I treat routine maintenance and CapEx as two different buckets, same as you outlined. A flat percentage is a starting point, not a property plan—an older SoCal roof, HVAC, or water heater can blow through a generic 8–10% line in one season. For each asset I’d list major systems with age and a rough replacement window, fund a monthly ops reserve from rent, and keep CapEx cash sized to the next likely system failure rather than mixing it with paint and filters. The mistake that hurts absentees most is calling remaining cash “profit” before those reserves are funded. Local vendor quotes beat national rules of thumb when you’re underwriting the next few years.

Divin Kanyama · Answer

I agree with separating maintenance reserves from CapEx reserves, @Mike Fisher. A fixed percentage is a good starting point, but the property's age and condition matter just as much.

A newer property may be fine at 5% to 8%, while an older property with aging systems may need significantly more. The key is recognizing that roofs, HVAC systems, and water heaters aren't unexpected expenses. They're known future costs with uncertain timing.

The biggest mistake is treating cash flow as profit before funding reserves. Long-term investors plan for major repairs before they happen, not after.

Michael Eskenasy · Answer

Mike, I’d keep the 8–10% rule as a screening heuristic, not the reserve model itself.

The cleaner way to think about it is that maintenance and CapEx are two different liabilities. Routine maintenance is stochastic and recurring; CapEx is slower, larger, and tied to the remaining useful life of specific systems. Your two-account framework gets that distinction right.

Where I’d push it further is at acquisition. Instead of saying “this property gets 8% or 10%,” build a simple system-age ledger: roof, HVAC, water heater, plumbing, electrical, appliances, windows, exterior, major common-area items if applicable. For each one, track age, expected remaining life, estimated replacement cost, and current condition.

Then your reserve requirement becomes property-specific.

A recently gut-rehabbed building may legitimately need a lower near-term reserve. An older building with a 17-year-old roof, aging mechanicals, and original plumbing may need far more than 10% even if the rent looks great. Jonathan’s example of two roofs hitting at the same time is exactly why averages can fail at the portfolio level.

The other thing I’d watch is concentration risk. If five properties all have furnaces installed in roughly the same period, you don’t really have five independent CapEx events—you have one future cluster of liability.

So I’d underwrite reserves in three layers:

• monthly operating maintenance
• asset-specific CapEx
• portfolio-level shock reserve

monthly operating maintenance

asset-specific CapEx

portfolio-level shock reserve

That gives you a much truer picture of distributable cash than treating whatever is left after the mortgage as profit.

This is exactly how our system looks at property operations: convert “surprises” into known future liabilities with dates, conditions, and funding attached to them. Feel free to reach out if you want to compare notes on the reserve model.

Jonathan Klemm · Answer

Hey @Mike Fisher - Love your profit-first addition for rental property owners.  I think it's a genius way to set up your rental portfolio - separate bank accounts and automatic transfers make it much easier as well.

Figuring out where your capex items are at before you purchase, and their lifespans, is for sure the professional way - maintenance and repairs will differ between different parts of Chicago and tenant classes as well.

I've personally learned the hard way about capex items and repairs on the South Side.  (2) of my buildings needed new roofs at the same time, and the maintenance and repairs were easily double or triple what I was used to.

HIGHLY ADVISE anyone who is new or reading this to follow the model Mike laid out - it's hard but will allow you to scale confidently because you have the proper cash set aside.

Aaron Zimmerman · Answer

10% - Chicago has too many old buildings to budget less. That said, if you gut the property, you could do 5%