What it means
Lenders look at DSCR before they approve a loan and continue to look at it afterwards. Debt service means the full set of payments due in a period, which is normally interest plus principal (the original amount borrowed).
The ratio shows how comfortable the borrower is in making those payments. The numerator is usually net operating income, or earnings before interest, tax, depreciation and amortisation, depending on the lender.
Property lenders tend to use net operating income, while corporate lenders often use EBITDA (earnings before interest, tax, depreciation and amortisation). Whichever measure is used, the loan agreement should define it exactly.
A ratio of 1.0 means income exactly equals debt payments, leaving no margin for error. Lenders usually want a cushion, and a minimum such as 1.25 is a common requirement, though the right level varies by sector and lender.
Business owners should check the covenant (the minimum set in the loan contract) to avoid a breach. DSCR is useful for planning as well as for borrowing.
A finance team can test how much extra debt the business could take on before the ratio falls below the lender's limit. It can also show how a fall in sales would affect the ability to repay.
The ratio has limits. It looks at a single period and ignores cash tied up in working capital, large capital spending or tax payments, so a business can pass the test and still run short of cash.
Many analysts therefore read DSCR alongside cash flow forecasts. Seasonal businesses should look at the ratio over a full year rather than a single quarter.
A garden centre may show a very low ratio in winter and a very high one in summer, and only the annual figure tells the true story. Lenders often test the covenant on a rolling twelve-month basis for exactly this reason.
In practice
Real-world examples
Example 1
A commercial landlord applies for a $4,000,000 mortgage. The bank calculates the DSCR using projected rent after costs and requires at least 1.30. The landlord reduces the loan request slightly so that the ratio passes.
Example 2
A manufacturing company with an equipment loan has a covenant of 1.20. After a poor quarter, its DSCR falls to 1.10, and the finance director contacts the bank before the breach is reported, agreeing a temporary waiver. In return the company provides monthly figures until the ratio recovers.
Example 3
A restaurant group plans to open three new sites funded by a bank loan. The finance team models DSCR under a normal case and a case where sales are 15% lower, and chooses a loan size that still keeps the ratio above 1.0 in the weaker case. The board accepts a slower expansion in return for a safer financing plan.
Think of it
DSCR is like ensuring your income covers both mortgage interest AND principal payments with room to spare.
Formula
Calculation
DSCR = Net operating income / Total debt service
Suppose a rental property earns net operating income of $600,000 in a year. The annual loan payments, including interest and principal, are $480,000. DSCR = 600,000 / 480,000 = 1.25. This means the property generates $1.25 of income for every $1.00 of debt payment, so it meets a typical lender minimum of 1.25 but with no extra room.Case study
Seen in the real world
Greenbridge Dental is an illustrative, fictional group of clinics that wanted to borrow $1,500,000 to buy a competitor. Its annual operating income was $420,000, and the proposed loan would require yearly payments of $360,000.
The bank calculated a DSCR of 420,000 / 360,000, or about 1.17, which fell below its required 1.25. The founder responded by extending the loan term, which lowered yearly payments to $320,000 and raised the ratio to about 1.31.
The illustrative group got the loan approved, and the founder learned that adjusting the length of the loan can be as important as the size of it. The trade-off was a higher total interest cost over the life of the loan, which the board accepted in return for a safer repayment profile.
Watch out
Common mistakes
- Including only interest and leaving out principal repayments, which makes the debt burden look smaller than it really is.
- Using a different definition of income from the one in the loan agreement, so the ratio you calculate does not match the lender's figure.
- Treating a ratio just above the minimum as safe, when a small fall in income could push it into breach.
Questions
People also ask
What is a good DSCR?
Many lenders look for at least 1.20 to 1.50, though the right level depends on the industry, the stability of the income and the lender's own policy. Small differences in definition, such as whether one-off costs are excluded, can also move the ratio by a visible amount.
What happens if DSCR falls below the covenant?
The lender may demand a fix, charge a higher rate, restrict dividends or in serious cases call the loan, so it is wise to talk to the bank early.
Is DSCR the same as interest cover?
No, because interest cover compares earnings with interest only, whereas DSCR also includes principal repayments.
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