Should You Buy a Rental That Doesn't Cover Its Mortgage?

Sometimes, but only if you can carry the gap comfortably and you have a clear reason to believe it closes. At today's rates, a lot of well located Greater Boston rentals don't cover their full payment on day one. That doesn't automatically make them bad buys. It makes them a bet on time, rent growth and your own cash, and you should know exactly how big that bet is before you make an offer.

How do you measure the gap?

Put the real numbers side by side, monthly:

• Rent you can safely count on. Use conservative, market supported rent, not the best case.
• Your full payment: principal, interest, taxes and insurance.
• Everything else: vacancy, repairs, management, utilities you cover, and reserves.

Here's an illustration with round numbers (not a real property):

• Safe rent: about $7,000 a month
• Estimated payment: about $9,800 a month
• Gap: about $2,800 a month, before vacancy and repairs

That's over $33,000 a year you'd be putting in. Some investors can carry that for the right building. Many shouldn't.

What can close the gap?

• A seller credit toward a rate buydown. Lowering the rate for the first years can shrink the payment while rents catch up. Here's how buydowns work and how much a seller can contribute.
• A realistic rent plan. Below market leases that turn over, or units you can improve and rent higher.
• A different down payment. More down lowers the payment, but ties up more cash.
• Living in one unit, if the building and the loan allow it.

Why does the loan type matter?

Owner occupied financing on two to four units, like FHA, can mean a smaller down payment, but it comes with its own rules. FHA's self-sufficiency test on three and four families trips up a lot of buyers. Larger buildings, or ones you won't live in, usually need conventional or commercial financing with more cash to close. On a larger building, it's common to need tens of thousands of dollars at closing on top of the down payment, so get a real estimate from your lender before you offer.

When is it still a good buy?

• You can carry the gap without stress for years, not months.
• The location and condition are strong enough that you'd still want to own it if rents stayed flat.
• You have a specific plan to raise income, not just hope.
• You've confirmed the big systems, like the roof, heating and electrical, so a surprise repair doesn't double the gap.

If you can't say yes to all four, keep looking or negotiate harder.

Questions people actually ask.

Is negative cash flow ever worth it?

It can be, if you're buying for long term appreciation and can comfortably cover the shortfall. It's a bad idea if you're counting on the rent to pay your bills.

How much should rent cover on a rental property?

Ideally the full payment plus vacancy, repairs and reserves. In expensive markets, many investors accept less at first, but they plan for it.

Can a seller credit be used for a rate buydown on an investment property?

Often, but limits are lower on investment property. Confirm with your lender before you negotiate.

What should I check before making an offer on a rental?

The real rents and leases, the age of the roof and major systems, taxes and insurance, and what the lender will require for your loan type.

General information, not a loan offer. Confirm numbers and loan options with a licensed loan officer.

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This article is general information about Massachusetts real estate, not legal, tax, or financial advice. Every property and transaction is different. For advice on your situation, talk with me and, where appropriate, an attorney, lender, or tax professional.