DSCR: the number your lender cares about most

Debt service coverage ratio is net operating income divided by annual debt service. A DSCR of 1.25 means the property produces $1.25 of income for every dollar of loan payment.

It is the single number most commercial lenders start with, and it is also the best available measure of how much cushion a deal has.

What lenders typically require

Requirements vary by asset type, lender and cycle, and the general shape is consistent.

Stabilized multifamily typically requires something in the region of 1.20 to 1.25. Commercial and retail frequently more, often 1.30 to 1.40. Hospitality and other operationally intensive assets more still. Single-family DSCR loan products for investors commonly sit around 1.10 to 1.25 depending on the program.

Below 1.0 means the property does not cover its own debt. Lenders do not make that loan against stabilized income, and if you find yourself there after closing, you are writing checks every month.

Why it constrains loan size

This is the part investors discover late.

Most loans are subject to two tests: loan-to-value and debt service coverage. You get the lesser of the two.

In a low-rate environment, LTV is usually the binding constraint — the property covers the payment comfortably and the lender's limit is the appraised value.

When rates rise, DSCR becomes binding. The same property, at the same value, supports a smaller loan because the payment is larger.

Consider a property with $60,000 of NOI. At a five percent rate on a thirty-year amortization, a $900,000 loan costs about $58,000 a year — coverage barely above 1.0, so the lender sizes down. At a 1.25 requirement, the supportable payment is $48,000, which at five percent supports roughly $745,000. At seven percent, the same $48,000 payment supports around $600,000.

Nothing about the property changed. The available loan fell by nearly twenty percent.

This mechanism is why rising rates compress prices even when demand is intact, and why refinancings that looked routine in 2021 became difficult later.

The refinance problem

The situation that catches people is a loan maturing into a higher-rate environment.

A five-year loan taken at a low rate matures. The property's NOI has grown, perhaps meaningfully. But the new loan is sized on the new rate, and the payment is much larger.

If the new supportable loan is smaller than the outstanding balance, the borrower has to bring cash to the closing table to pay the difference. That is a capital call nobody budgeted for, and it is the mechanism behind a good deal of the distress in commercial real estate over recent years.

The defense is simple to state and unpopular to implement: do not size the original loan to the maximum, and do not assume you will refinance into favorable conditions.

How the ratio gets manipulated

The same games as with cap rate, because the input is the same NOI.

Expenses excluded. Vacancy assumed low. Management omitted. Reserves absent. Pro forma rents used instead of in-place.

Lenders have seen all of these and generally underwrite their own NOI, applying their own vacancy factor, management fee and reserve. The lender's number is frequently lower than the broker's, which is why deals that pencil on the marketing package fail at the credit committee.

You should do the same exercise, for your own protection rather than the lender's.

Reading it as a stress measure

The most useful thing about DSCR is that it converts directly into a margin of safety.

At a coverage ratio of 1.25, NOI can fall twenty percent before the property stops covering debt service. At 1.50, it can fall a third. At 1.10, it can fall nine percent — which is one extended vacancy in a small building, or one insurance renewal in a hard market.

Ask what NOI decline your coverage tolerates, then ask whether a decline that size is plausible in your market. In a submarket with heavy new supply coming, it usually is.

Covenants

Commercial loans typically include an ongoing DSCR covenant, tested periodically. Breaching it can trigger cash management, restrict distributions, or in serious cases constitute default even when payments are current.

Read the covenant, know how it is calculated — definitions of NOI in loan documents differ from the ones in brokerage packages — and know how much room you have.

The practical rule

Underwrite to a coverage ratio you would still be comfortable with if rents fell ten percent and expenses rose ten percent.

That usually means borrowing less than you can. Which is, in most cycles, the difference between the investors who are still operating after a downturn and the ones who are not.

General information about real estate finance, not investment, tax or legal advice. Loan terms and underwriting standards vary. Consult qualified professionals about your own circumstances.