How Much Cash Reserve Should a Landlord Keep?
September 15, 2026A cash reserve is the difference between a broken water heater being an inconvenience and it being a financial crisis. Yet it's one of the most commonly skipped parts of running a rental — landlords budget for the mortgage, taxes, and insurance, then treat every dollar of cash flow above that as spendable, with nothing set aside for the repair that's inevitably coming.
A starting framework
There's no single number that's right for every landlord, but a few common approaches give a reasonable starting point.
- • 3-6 months of operating expenses (mortgage, taxes, insurance, average maintenance) per property, as a baseline
- • 1-2% of the property's value per year, set aside specifically for capital repairs, separate from your operating reserve
- • A higher reserve — 6+ months — for older properties, or ones with an aging roof, HVAC system, or plumbing that hasn't been updated in decades
- • A lower reserve, closer to 3 months, may be reasonable for a newer property with a home warranty still in effect
Why the reserve needs to be separate, not just "available"
A reserve that's mentally set aside but sitting in your regular checking account tends to get spent — on a vacation, a different investment, or just absorbed into daily spending without a clear decision being made. A reserve that actually functions needs its own account, ideally one that isn't trivially easy to transfer out of on impulse.
What the reserve should — and shouldn't — cover
The reserve exists for things you can't fully predict: an emergency repair, an unexpected vacancy stretch, a tenant who stops paying and needs to go through the eviction process. It's not meant to cover routine, predictable costs like the mortgage or annual insurance premium — those belong in your regular operating budget, not the reserve.
Rebuilding the reserve after you use it
The reserve isn't a one-time achievement — it's meant to be spent when something genuinely warrants it, then rebuilt. Treat replenishing it after a draw the same way you'd treat any other recurring expense: budget a fixed amount back into it each month until it's restored.
Frequently Asked Questions
Should each property have its own separate reserve, or one shared reserve for the whole portfolio?
Either works, but a shared reserve across several properties needs to be sized larger than the sum of each property's individual minimum, since you're accepting the (small) risk that two properties need repairs at the same time.
Is it okay to use a line of credit instead of cash reserves?
A line of credit can supplement a reserve, but relying on it entirely means paying interest on emergencies, and credit can tighten or disappear exactly when a broader economic downturn also makes tenants more likely to fall behind on rent.
How do I know my reserve is actually sized correctly?
Track how much you actually draw from it per property per year over a few years — if you're consistently pulling more than your reserve holds, it needs to be larger; if it never gets touched, you may be over-reserving cash that could be working elsewhere.