How do I evaluate a rental property before buying?

Evaluate a rental property by checking the rent it can plausibly collect, the complete cost of operating it, the cash needed to buy and prepare it, and the payments due before tenants pay you. Then test a less favorable version. A rent-to-price ratio is too small a picture for that decision.

Use actual lease records, property records, independent inspection findings and written management and financing terms where available. Asking rent is a proposal; an assumed tenant is not a signed lease. Mark those distinctions before calculating a return.

Write a complete first-year case

Consider an original fictional rental house costing $240,000, bought on December 31, 2026. The supplied loan provides $180,000. The buyer pays $60,000 down, $6,000 of closing costs and $9,000 for preparation completed before the rental year. All $75,000 is paid at purchase. There is no tenant deposit or seller credit to use as owner money.

The buyer has $83,000 assigned solely to this property after protecting household and other obligations. The purchase and preparation leave an $8,000 operating reserve. There is no additional owner contribution or credit line in the first version.

The house is vacant in January 2027 and rented from February through December at $2,400 a month. All eleven payments are collected at the beginning of their month. These are scenario inputs, not a verified market forecast. January utilities cost $300; from February, the tenant pays utilities directly under the supplied lease terms.

Management costs eight percent of rent actually collected. Its quoted scope covers all required routine owner oversight, coordination and leasing work in this finite case; the buyer contributes no unpaid operating labor. Annual property taxes total $3,600, paid as $1,800 in January and July. Insurance costs $1,200 in January. Association charges and routine maintenance each cost $100 monthly.

Separate operation, debt and major work

Rent collected totals $26,400. Management costs $2,112. Taxes, insurance, association charges, maintenance and January utilities add $7,500. Subtracting the $9,612 of operating payments leaves $16,788 before financing and the separate major repair below.

The supplied lender quote requires twelve $1,200 principal-and-interest payments during 2027: $14,400 total. This is a quoted schedule, not a payment derived from an assumed rate. Taxes and insurance are paid separately rather than included in that amount. The CFPB's Loan Estimate explainer distinguishes principal and interest from a total payment that may include escrowed costs. Use the actual available terms for the property and loan you are considering.

After debt payments, the case leaves $2,388. But inspection has also identified a $6,000 roof repair, due in March and separate from the $9,000 preparation and monthly maintenance. Including that payment changes the year's cash movement to negative $3,612.

This is a before-income-tax cash model. It is not taxable income or accounting profit: debt payments include principal, and the major repair is shown as a cash payment without deciding its tax treatment. There are no other receipts, costs, balances or payments in this finite scenario. A real property review must establish what additional items belong.

Find the lowest balance

Start with the $8,000 remaining after purchase. January has no rent and requires $4,700: loan payment, taxes, insurance, association charge, maintenance and utilities. The reserve falls to $3,300.

Each ordinary occupied month brings $2,400 and pays $1,592: $1,200 debt service, $192 management, $100 association charges and $100 maintenance. February adds $808, taking the reserve to $4,108.

March adds the same $808 but also requires the $6,000 repair. The resulting balance would be negative $1,084. That means the proposed payment plan cannot be carried out with the supplied money. A spreadsheet continuing through a negative balance is describing missing funding, not an account the owner can spend.

Later rent does not repair that earlier failure. Across the entire year, the modeled reserve would end at $4,388—$8,000 less $3,612—even though it fails in March. July's extra tax payment also needs its place on the calendar.

Change an input without hiding the gap

If the buyer can assign another $2,000 before purchase, without taking money already committed elsewhere, the opening operating reserve becomes $10,000. The same March schedule then leaves $916, and December ends at $6,388. The extra funding removes this modeled gap; it does not improve the property's operating result or provide a comfortable reserve for an unmodeled repair.

Alternatively, negotiate an evidenced price or repair arrangement, investigate different terms or pass. Do not move the roof bill simply because March is inconvenient. The contractor would have to agree and the property's condition and service obligations would still need to support the timing.

A second empty month would remove $2,400 of rent and $192 of management cost, reducing cash by another $2,208 before any extra utilities or reletting work. Check the resulting date-specific balance and the newly required costs. The positive January-to-December summary should not decide that risk for you.

Keep the exit out of current cash

No sale or appreciation supplies cash in this first-year case. A later total-return comparison would need sale proceeds, remaining debt, selling costs, taxes and all owner contributions on their actual dates. The borrowing-and-owner-cash example explains why a mature-year percentage can omit part of the funding commitment.

Before making an offer, finish three outputs: a supported operating case, a complete purchase allocation and a calendar whose low balance you can actually fund. The lender's collateral or income test, discussed in property value and borrowing capacity, is another review; approval would not establish that your purchase is attractive.