How Much Cash Flow Should a Rental Property Have?

There's no universal number

A $100/month target means something completely different on a $120,000 Midwest single-family than on a $600,000 coastal duplex. On the first it is a solid margin against a small expense base; on the second it is a rounding error that one water heater erases.

Cash flow is better judged as a percentage of rent and as a buffer against the property's real expense volatility than as a flat dollar figure.

Common investor benchmarks

$100–$200 per unit per month is the most quoted rule of thumb for long-term rentals, and it is a reasonable floor for smaller properties.

10% of gross rent is a more scalable version of the same idea and adapts automatically to price level.

Cash-on-cash of 8%+ is the return-based equivalent, useful when comparing against other investments rather than other rentals.

Debt service coverage of 1.25x is what lenders use, and it is a good private benchmark too: it means income covers the loan with a 25% cushion.

What affects the right target for you

Property age and condition: an older building needs a larger monthly cushion because capital expenses arrive in lumps.

Unit count: a single vacancy in a one-unit rental wipes out a full month of income; a duplex or fourplex spreads that risk.

Reserves on hand: with six months of expenses banked you can accept thinner monthly cash flow. With no reserves, thin cash flow is how properties get sold at a loss.

Strategy: appreciation-market investors and house hackers routinely accept near-zero or negative cash flow in exchange for equity growth or reduced personal housing cost. Cash-flow-market investors should not.

Management: if you self-manage, remember your 8–10% saving is compensation for work, not extra profit — model it as an expense so the deal stands on its own if you hand it off.

Run your numbers

Field ROI shows monthly cash flow alongside cap rate and cash-on-cash return as you adjust rent, expenses, and financing, so you can see exactly what it takes for a deal to hit your target.