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How much cash reserves does an investor need?

Updated October 20, 2026 · by ROW Home Solutions

Reserves are the cash you still have after closing. They're what keeps a vacancy, a broken water heater or a job change from turning into a crisis.

Two different numbers

What the lender requires: many investment loans require you to show a certain number of months of payments in reserve. The number depends on the loan program and how many properties you own. Your lender will tell you exactly.

What you should want: that's your call, and it's often more than the lender's minimum. Consider the property's age, whether you have other income, how stable that income is, and how long a vacancy could last in your market.

How to calculate months of reserves

Months of reserves = cash left after closing ÷ total monthly payment (PITI + HOA)

Example with made-up numbers:
$18,000 left ÷ $2,250/month = 8 months

What counts

• Checking and savings: full value.
• Brokerage accounts: lenders may count only part of the value, since prices move.
• Retirement accounts: may count partially; withdrawing can trigger taxes and penalties.
• Crypto: treatment varies a lot by lender; don't assume it counts.

A practical approach

Keep your personal emergency fund separate from property reserves, and set a written number before you shop. If a deal would drain you below it, the answer is "not yet," not "no forever."