What it means
A lender's first question is not "what is this borrower worth?" but "will I be paid?". Interest cover answers part of it, by comparing profit with interest, but ignores the principal repayments, which for an amortising loan are usually larger than the interest.
Debt service coverage puts both in the denominator and puts cash, not profit, in the numerator, so that it measures what actually matters: the cash coming in against the cash going out to the lender. It is the standard test in project finance, commercial property lending, leveraged finance and most bank term lending, and it appears in loan agreements as a covenant that the borrower must meet at each test date.
The numerator, often called cash flow available for debt service, is defined in the loan agreement, and the definition matters. For an operating company it typically starts from earnings before interest, tax, depreciation and amortisation, deducts cash taxes and the capital expenditure needed to maintain the business, and adjusts for working capital movements; some definitions are more generous, some less.
For an income-producing property it is net operating income: rents less operating costs, before financing. For a project, it is the project's own cash flow after operating costs and taxes.
What is excluded is as important as what is included: one-off gains, asset sales and new borrowing are not cash generated by the business and should not be counted. The denominator is the debt service due in the period: interest plus scheduled principal repayments, on all the borrower's debt or, in a ring-fenced project, on the specific facility.
Lease payments are included where leases are treated as debt. A bullet loan, repaid in one sum at maturity, has a low debt service during its life and an enormous one in the final year, which the ratio will not capture unless the refinancing risk is assessed separately.
Lenders use the ratio in two ways. Sizing: the maximum loan is the amount whose debt service the forecast cash flow covers at the required ratio, so a lender requiring 1.3 times coverage on cash flow of $1,300,000 will lend an amount whose annual debt service is $1,000,000, and the loan size follows from the interest rate and the term.
Monitoring: a covenant sets a minimum ratio, tested quarterly or annually on trailing figures, and a breach is an event of default that lets the lender renegotiate, take fees, restrict distributions or, in the last resort, demand repayment. Property and project loans often add a cash lock-up: if the ratio falls below a trigger above the default level, cash is trapped in the borrower and cannot be distributed to shareholders until coverage recovers.
For the borrower, the ratio is the tool for testing whether a proposed structure is survivable. A loan whose coverage is 1.2 times on the plan is 0.9 times if cash flow falls 25%, which in most businesses is within the range of a bad year.
Prudent borrowers test coverage on a downside case and structure the debt, through longer terms, interest-only periods, sculpted repayment profiles or simply a smaller loan, so that the ratio stays above the covenant in that case. Lenders tend to require 1.2 to 1.5 times for stable businesses and properties, and more for volatile ones.
In practice
Real-world examples.
Example
A hotel's lender sizes its loan at 1.40 times coverage on the base case, so that the ratio stays above the 1.20 times covenant even if occupancy falls ten points.
Example
A manufacturing company's debt service coverage falls to 1.05 times after a weak year, triggering a lock-up under which no dividends can be paid until the ratio is back above 1.30 times for two consecutive quarters.
Example
A wind farm project is financed with a repayment profile sculpted to the forecast electricity revenue, so that coverage is a constant 1.35 times in every year rather than tight early and loose later.
Think of it
“DSCR is like ensuring your income covers both mortgage interest AND principal payments, not just the interest portion.
Formula
Calculation
Debt service coverage ratio = Cash flow available for debt service / Debt service
Cash flow available for debt service (operating company) = EBITDA minus Cash taxes minus Maintenance capital expenditure (plus or minus working capital movement, per the agreement)
Debt service = Interest + Scheduled principal repayments (+ lease payments where treated as debt)
Maximum debt service at a required ratio = Cash flow available / Required ratio
Annual payment on an amortising loan = Loan x Rate / (1 minus (1 + Rate) to the power of minus Years)
Worked example: operating company. A company has EBITDA of $6,000,000, pays cash tax of $900,000 and needs $700,000 a year of capital expenditure to maintain its equipment. It proposes to borrow $20,000,000 at 6%, repaid in equal annual principal instalments over eight years.
- Cash flow available for debt service = $6,000,000 minus $900,000 minus $700,000 = $4,400,000
- Year 1 debt service = interest $20,000,000 x 6% = $1,200,000, plus principal $20,000,000 / 8 = $2,500,000; total $3,700,000
- Coverage = $4,400,000 / $3,700,000 = 1.19 times, below the lender's 1.25 times covenant
- Option: extend to ten years. Principal $2,000,000; debt service $3,200,000; coverage = 1.38 times
- Option: borrow $17,000,000 over eight years. Interest $1,020,000; principal $2,125,000; debt service $3,145,000; coverage = 1.40 times
Worked example: property. An office building produces net operating income of $1,800,000. A lender offers a 25-year amortising loan at 5.5%.
- On $18,000,000, the annual payment = $18,000,000 x 0.055 / (1 minus 1.055 to the power of minus 25) = $18,000,000 x 0.0745 = about $1,342,000
- Coverage = $1,800,000 / $1,342,000 = 1.34 times
- Maximum loan at 1.25 times: maximum payment = $1,800,000 / 1.25 = $1,440,000; loan = $1,440,000 / 0.0745 = about $19,300,000
- Downside: if income fell 15% to $1,530,000, coverage on the $18,000,000 loan would be $1,530,000 / $1,342,000 = 1.14 times, below the covenant; the borrower might choose to borrow $16,000,000 instead to keep the downside case above 1.25Case study
Seen in the real world.
A hotel developer sought project finance for a 200-room hotel with a forecast stabilised net operating income of $5,000,000 a year. The lender's terms were a 15-year amortising loan at 6%, sized so that the base-case coverage was at least 1.40 times, with a covenant minimum of 1.30 times and a distribution lock-up if coverage fell below 1.35 times.
Maximum debt service was therefore $5,000,000 / 1.40 = about $3,571,000 a year, and at the loan's annuity factor of 0.1030 that supported a loan of about $34,700,000. The developer had hoped for $40,000,000 and had to find the difference in equity.
The hotel opened on time and traded well in its first year, but a new competitor opened nearby in the second year and net operating income for that year came in at $4,200,000. Coverage was $4,200,000 / $3,571,000 = 1.18 times: above 1.0, so the loan was being serviced, but below both the lock-up trigger and the covenant. The lender did not accelerate; it had no wish to own a hotel.
It invoked the lock-up, so that all cash after debt service accumulated in a controlled account rather than being distributed to the developer, charged a waiver fee, and required a revised business plan. The developer, who had been drawing distributions to fund its next project, had to find other money for two years while the hotel's marketing was rebuilt and income recovered to $4,900,000 in the fourth year, restoring coverage to 1.37 times and releasing the trapped cash.
The developer's finance director drew two conclusions. The lender's insistence on sizing at 1.40 times rather than lending the $40,000,000 requested had saved the project: at $40,000,000 the debt service would have been about $4,120,000 and second-year coverage 1.02 times, with no margin at all.
And the lock-up, which had seemed like a technicality at signing, was the provision that actually bit, because it cut off the cash the developer had assumed it could rely on. Coverage ratios, the director noted, are not paperwork; they are the mechanism by which a lender protects itself, and the borrower who understands them structures the loan so they are never tested.
Watch out
Common mistakes.
- Using profit rather than cash in the numerator, or EBITDA without deducting the taxes and maintenance capital expenditure the business must pay before it can pay the lender.
- Testing coverage only on the plan; a ratio of 1.2 times on the forecast is below 1.0 if cash flow falls 20%, which is an ordinary bad year in many businesses.
- Ignoring the repayment profile; a bullet loan shows comfortable coverage every year until the year it must be repaid or refinanced.
Questions
People also ask.
What is the difference between debt service coverage and interest cover?
Interest cover compares profit with interest only; debt service coverage compares cash with interest plus principal repayments. For an amortising loan, principal is usually the larger part of the payment, so interest cover alone overstates affordability.
What is a good debt service coverage ratio?
Lenders typically require 1.2 to 1.5 times for stable businesses and income-producing property, and higher for volatile or project-based cash flows. Below 1.0 means the borrower cannot service its debt from operations.
What happens if the ratio falls below the covenant?
It is usually an event of default, giving the lender the right to charge fees and higher margins, trap cash, require a new plan or, in the last resort, demand repayment. In practice most breaches are resolved by waiver and renegotiation, on the lender's terms.
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