Calculate coverage
Annual NOI is divided by annual principal-and-interest debt service.
Rental, Investment and Commercial Real Estate
DSCR Calculator Commercial Real Estate
Calculate debt-service coverage ratio, NOI surplus, required NOI, debt-service capacity, and an estimated maximum loan amount at a selected target DSCR.
Current DSCRTarget coverage testRequired NOIMaximum debt service
Calculation inputs
Measure debt-service coverage
Compare normalized annual NOI with annual principal-and-interest debt service, then estimate debt-service and loan capacity at a target DSCR.
Loan-capacity assumptions
%
years
How the calculation works
Understand the formula before relying on the result
Apply the target
Required NOI equals current debt service multiplied by target DSCR.
Find debt-service capacity
NOI is divided by target DSCR to estimate the maximum annual debt service supported.
Estimate loan capacity
Supported debt service is converted into a level-payment loan using the selected rate and amortization.
Interpret the result
Above 1.00x means coverage
NOI exceeds modeled debt service, but the lender may require a larger cushion.
Target is lender-specific
Required DSCR varies by asset class, leases, market, borrower, and risk.
Loan capacity is not approval
LTV, debt yield, borrower strength, appraisal, and due diligence may reduce the loan.
NOI quality matters
A ratio is only as reliable as the normalized income and expense assumptions used.
Common mistakes
- Using gross income instead of NOI.
- Using interest-only debt service when the loan amortizes.
- Ignoring reserves required by the lender.
- Treating a target DSCR as universal.
- Assuming the debt-service loan amount automatically satisfies LTV or debt yield.
What lenders review
- Lender-normalized NOI.
- Actual proposed debt-service schedule.
- Lease durability and tenant concentration.
- LTV and debt yield constraints.
- Borrower liquidity, experience, credit, and guarantees.
Planning tips
- Use annual principal-and-interest debt service from the proposed structure.
- Run a lower-NOI stress case.
- Compare maximum loan with LTV and debt-yield sizing.
- Review the renewal balance separately.
- Document every NOI adjustment.
Connected HopeWell knowledge
Connect the dscr calculator to the mortgage decision
Use the result alongside HopeWell's guide chapters, glossary definitions, real underwriting case studies, service pages, and related calculators.
Calculation pathway
Related mortgage calculators
Continue into qualification, purchase costs, equity, refinancing, HELOC planning, and mortgage comparison using the connected calculators below.
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Frequently asked questions
Questions about this calculation
What is the DSCR formula?
DSCR equals annual net operating income divided by annual debt service.
What does a 1.25x DSCR mean?
It means NOI is 1.25 times annual debt service under the assumptions used.
Can DSCR be used for residential rental property?
It can be a useful property-level measure, although residential lenders may qualify rental income differently.
Why is maximum loan only an estimate?
It uses rate and amortization to convert debt-service capacity into a loan but does not apply other underwriting limits.
Can NOI be negative?
Yes. Negative NOI indicates operating expenses exceed effective property income and the property cannot support debt service from operations.