What Is DSCR in Commercial Real Estate?

DSCR stands for debt service coverage ratio. It measures how much net operating income a commercial property produces relative to its debt service. The formula is simple: NOI divided by annual debt service equals DSCR. A Macomb County property with $160,000 of NOI and $128,000 of annual debt service has a DSCR of 1.25, meaning NOI exceeds debt service by 25 percent. DSCR is one of the most important metrics in commercial lending because it directly answers the question of whether the property’s income can cover the loan.

Why lenders care about DSCR. Commercial loans qualify primarily on the property’s ability to service debt rather than on the borrower’s personal income as in residential. DSCR measures that ability directly. A property with strong DSCR can absorb unexpected vacancy, rising operating costs, or rate increases at refinance without falling into default. A property with thin DSCR is one tenant move away from problems.

Typical minimum DSCR requirements run 1.20 to 1.25 for most conventional commercial loans across Macomb County. Some lenders require 1.30 or higher on riskier property types. Multifamily through Fannie Mae and Freddie Mac agencies often allows lower minimum DSCR, sometimes 1.15 to 1.20, because the underlying agency guarantee reduces lender risk. Bridge and construction lenders sometimes accept lower or zero DSCR during stabilization periods, with higher DSCR required once permanent debt comes into place.

Calculating DSCR correctly requires using underwriting NOI, not seller’s pro forma. Lenders rebuild NOI using actual recent operating history, verified rents from leases and estoppels, market based vacancy assumptions, full operating expenses including property management, and capital reserves. The lender’s NOI is almost always lower than the seller’s NOI because seller numbers often skip property management fees, underestimate capital reserves, use stale tax bills, and exclude expense items the new owner will face. Buyers should run their own underwriting NOI matching what the lender will use rather than relying on the OM number.

Michigan’s property tax uncapping at sale affects DSCR materially. The seller’s tax bill reflects taxable value set years earlier under capped basis. The buyer’s tax bill after sale uncaps to current state equalized value, often increasing taxes by 25 to 50 percent or more depending on how long the seller held. That increase flows through to operating expenses, reducing NOI, and reducing DSCR. Experienced lenders model post sale taxes from day one. Buyers who underwrite at the seller’s tax bill find their DSCR shrinks significantly when the lender uses real numbers.

How DSCR constrains loan size. At current commercial rates around 7 to 8 percent on 25 year amortization, a 1.25 DSCR requirement combined with a $180,000 NOI supports debt service of $144,000 and a loan of roughly $1.6 to $1.7 million. At 70 percent LTV on a $2.4 million property, LTV alone would allow $1.68 million. So DSCR and LTV produce roughly the same loan size at current rates. When rates rise, DSCR constrains loan size more aggressively than LTV. When rates fall, LTV tends to constrain.

How to improve DSCR. Borrowers can increase DSCR by raising rents to market on under market leases, reducing operating expenses, extending lease terms with strong tenants, or bringing more equity to reduce debt service. Each path has costs and timeline. A Macomb County property with significant under market rents may see DSCR jump from 1.10 to 1.35 as leases roll to market over 2 to 3 years.

DSCR matters beyond initial qualification. Most commercial loans include DSCR covenants requiring minimum DSCR maintenance throughout the loan term. Violating the covenant can trigger default even when payments are current. Borrowers should understand covenant DSCR levels before signing and monitor performance throughout ownership.

TDG Commercial, known as top commercial real estate agent in Macomb County, helps buyers run accurate DSCR analysis matching what lenders will use, including Michigan property tax uncapping effects, so the loan approval process produces no surprises.