How DSCR Loans Are Sized, and Why Rising Rates Shrink Refinance Proceeds
Rental loans are sized off a property's income, not the borrower's. That makes every move in rates show up directly in how much a bridge borrower can refinance.
Why it matters
- The refinance into a DSCR loan is the exit on many fix-and-flip and bridge loans.
- At a fixed rent, a higher rate means a higher payment and a smaller loan that the property's income can support.
- Lenders that size bridge loans assuming today's takeout rates can be left holding loans that cannot refinance in full.
Explainer: background on how this part of the market works.
A debt service coverage ratio loan, or DSCR loan, is a mortgage on an investment property that is underwritten mainly on the property's income. Instead of verifying the borrower's personal income, the lender asks a simpler question: does the property bring in enough to cover its own debt payments?
For private lenders, DSCR loans matter even when they don't make them. They are the most common long-term takeout for borrowers who buy, renovate and rent a property with a short-term bridge or rehab loan. If the takeout comes in smaller than expected, the bridge loan does not get repaid in full.
The ratio
The ratio divides the property's income by its debt payments.
- On residential rentals (one to four units), lenders typically compare monthly rent with the full monthly housing payment: principal, interest, taxes, insurance and any association dues.
- On commercial and larger multifamily properties, lenders typically use net operating income (rent minus operating expenses) divided by annual principal and interest.
A ratio of 1.00 means the income exactly covers the payment. A ratio of 1.25 means income is 25% higher than the payment. Each lender sets its own minimum, and the minimum often affects the rate and leverage it offers.
How the loan amount is set
The lender works backward. It takes the property's income, divides by the minimum ratio to find the largest payment the property can support, then calculates the largest loan that payment can carry at the current rate and amortization.
That number is then compared with the lender's loan-to-value limit. The borrower gets the lower of the two. When rates are low, value is usually the constraint. When rates rise, income often becomes the constraint, and the loan shrinks.
Why rates matter so much
Take a small commercial property with $100,000 of annual net operating income, a 1.25 minimum ratio and a 30-year amortizing loan. The largest annual payment it can support is $80,000. Here is what that payment buys at different rates:
| Interest rate | Maximum loan |
|---|---|
| 6.5% | $1,054,700 |
| 7.0% | $1,002,000 |
| 7.5% | $953,500 |
| 8.0% | $908,600 |
The income did not change. The rate did, and each half-point rise cut the loan amount by roughly 5%.
The same math applies to a single-family rental. A house renting for $2,500 a month, with $400 a month in taxes and insurance, can support $2,100 a month in principal and interest at a 1.00 ratio. On a 30-year loan, that supports about $316,000 at 7% and about $286,000 at 8%.
What it means for bridge lenders
A borrower who bought and renovated a property expecting to refinance at 7% may find that the takeout at 8% is about $30,000 smaller per house. Unless the borrower has cash to cover the difference, the options are an extension, a sale, or a partial payoff.
Lenders can reduce that risk at origination:
- Size the exit at a stressed rate. Underwriting the takeout at a rate a point or more above today's level shows how much cushion a deal really has.
- Check rent assumptions. The takeout lender will use its own appraisal and rent estimate, not the borrower's projection.
- Price extensions in advance. Clear extension terms and fees in the original loan documents make a slow exit easier to manage.
For more on the current rate backdrop, see our analysis of the Fed's September rate hike.
Sources
- Figures in this article are illustrative calculations by The Lender Market using standard amortization math. Lender minimum ratios, rates and terms vary.
