Verify market rent before you trust a seller's numbers or make an offer on a rental property.
Rent comps are recent, comparable rentals that show what a real tenant is likely to pay today. Before you buy, use several nearby rentals with similar beds, baths, condition, and parking. Do not underwrite a deal from one optimistic listing or a seller's claim.
Market rent is one of the biggest inputs in a rental deal. If it is wrong, your cash flow, loan coverage, and exit plan can all be wrong with it.
Find five to ten nearby rentals. Remove the obvious outliers: luxury rehabs, furnished short-term units, unusually poor properties, and listings that have sat for a long time. Write down the asking rent, days on market, condition, and the features that matter.
Then choose a conservative number. If comparable rents range from $1,250 to $1,400, do not build your deal around $1,400 just because it makes the spreadsheet work. Start closer to the middle or lower end unless your property clearly earns more.
An asking rent is a lead, not proof. A listing that stays active for weeks may be priced too high. If you can speak with local managers, agents, or landlords, ask what has actually leased and how long it took. Their answer can expose a rent number that looks good online but does not hold up in real life.
You also need to consider vacancy. Even a strong monthly rent does not help if the property takes two months to fill every time a tenant leaves.
Use your conservative rent estimate, then subtract mortgage, taxes, insurance, vacancy, maintenance, capital repairs, and management if you will not manage the property yourself. The point is not to predict every dollar. The point is to see whether the deal has enough room for normal problems.
If the margin disappears after honest rent comps, do not try to rescue the deal with hope. Lower the offer, improve the plan, or move on.