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.

Richard F. · Answer

Upon re-reading this thread, it seems there might be an area of some confusion. A Maintenance Budget actually consists of the known, recurring maintenance costs such as yard service, seasonal HVAC service or other contracted services; and planned minor replacements or updates for the reporting year such as changing faucets or some light fixtures that do not meet the tax requirements to be charged as a CapEx expenditure.

You should have at a minimum under a maintenance category, separate sub-categories for plumbing, electrical, HVAC, doors & windows, carpentry, paint & paint prep, cabinetry, and appliances.

BUT, the budget should also include a separate sub category and/or line items for unexpected yet common contingencies. Clearing a blocked drain, repairing a supply line leak or broken irrigation line, troubleshooting and repairing a partial electrical outage, replacing a rusted out mailbox, and similar relatively inexpensive, but routine problems.  Depending on how many units you are working with, you may only need Plumbing, Electrical, and Miscellaneous sub categories. This "contingency" funding is not actually separated from your operating funds the way your reserves should be. This is just an accounting process to clarify the financial reporting.

Reserves are completely separate, and physically separate from your operating funds. There should be individual line items for specific elements that are at least one or more years out for planned replacement. HVAC unit. Roof. Kitchen complete update. Exterior full paint. Usually these elements should have a minimum cost of $5,000 to $10,000 depending on the property and locale...and they all meet the tax requirements for an "improvement".

Depending on how many units the property has, or how detailed you want long term reports to be, at a minimum you should have separate categories for Plumbing (known, contract, planned preventative, or recurring),  Plumbing contingency (for unexpected but common issues. This is an annual estimated figure based on unit/property history), and the Plumbing Reserves for major elements, such as a boiler, complete re-pipe, septic replacement, or other elements that exceed the "reserve" minimum amount.

With your Chart of Accounts set up in this manner, it is a simple matter to check the line item for each contingency categories to instantly see if you are over or under your estimated budget. Realistically, as an individual investor, you can still re-allocate funds from one category to another to make payment if you have a particularly expensive, and totally unexpected plumbing expenditure, for example. Each year you should re-evaluate the contingency amounts budgeted based on experience and expectations for each unit.

If, instead of developing a useful Chart of Accounts, you are lumping all plumbing, or electrical "repairs" into one category (or worse, just into one overall "repair" category), of course you will have a nightmare at year end to separate expenses for proper allocation.

Eduardo Cavasotti · Answer

Two buckets is right, but the reserve line is only real if it actually posts as its own transaction every month, not just a number that lives on a spreadsheet next to the rent roll. I check that against the bank deposit the same way I check everything else on a PM statement. Otherwise you find out the reserve was aspirational the same week the furnace dies.

Mike Fisher · Answer

This turned into a genuinely good thread, thank you all. The through line I keep seeing, and I agree with it, is that a flat percentage is a screening heuristic, not the reserve model itself. Michael and Leo put it well: build a system age ledger at acquisition (roof, HVAC, water heater, plumbing, electrical, appliances, windows, exterior) with age, remaining life, and replacement cost, then let the reserve be property specific. An older building with a 17 year old roof can need far more than 10 percent even when the rent looks great.

Jonathan's two roofs hitting at once is exactly why I watch concentration risk across a portfolio. If five units all got furnaces in the same era, that is not five independent CapEx events, it is one future cluster of liability. When a system is borderline I will stagger the replacement on purpose so the whole portfolio does not come due in the same winter.

So in practice on the south suburban side: fund routine maintenance monthly from rent, size CapEx at closing off the actual system ages, and keep the two accounts separate so a January furnace is a known cost rather than a surprise. The percentage gets you in the ballpark, the ledger keeps you honest.

Appreciate everyone weighing in.

Crystal Smith · Answer

For maintenance reserve we use between 5&10% depending on the age of the building.

Jim Johnson · Answer

I’m more in the “something else” camp. I like to look at the age and condition of the major systems and build the reserve around what’s actually coming. A 15-year-old roof and aging HVAC should change the number a lot more than whether the property rents for $1,500 or $1,700. I’ll still budget for routine maintenance along the way, but for the big-ticket items I’d rather plan around expected replacement costs than rely on one percentage for every property.

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%

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

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