What does a DSCR calculator compute?

It computes the Debt Service Coverage Ratio and related metrics using plain-text formulas. DSCR = Net Operating Income divided by Debt Service. Cash flow margin = Net Operating Income minus Debt Service.

How do I calculate DSCR with annual or monthly inputs?

Keep both inputs on the same time basis. Example (annual): Net Operating Income 42 and Debt Service 24 → DSCR = 42 / 24 = 1.75; cash flow margin = 42 − 24 = 18. The same arithmetic applies if both are monthly.

What counts as “Debt Service” and “Net Operating Income” here?

Debt Service is the required principal plus interest due for the period. Net Operating Income is operating cash flow available to pay debt after operating expenses (for small-business lending this often aligns with EBITDA adjusted per lender guidance). Project-finance variants use “cash flow available for debt service” but the ratio structure is the same (cash flow over principal+interest).

What DSCR is considered acceptable?

Many lenders look for DSCR ≥ 1.20–1.25. U.S. SBA 7(a) policy explicitly requires at least 1.15 based on operating cash flow over debt service, with 1:1 on a global basis. Higher ratios indicate more cushion.

How does the calculator round and display results?

Results are computed exactly from your inputs and then rounded to two decimals using round-half-even (bankers’ rounding). Currency labels use ISO 4217 three-letter codes (e.g., USD, EUR).

DSCR Calculator - Debt Service Coverage Ratio

DSCR Calculator

Evaluate Debt Service Coverage Ratio (NOI / Debt Service).

Time Basis

Net Operating Income

Debt Service

Results

DSCR
Coverage Category
Cash Flow Margin $

Debt Service Coverage Ratio (DSCR) Calculator

Use this DSCR calculator to evaluate your business’s ability to meet debt obligations. Enter your **Net Operating Income (NOI)** and **Debt Service** to find your coverage ratio and interpret the result.

Formula

DSCR = Net Operating Income ÷ Total Debt Service

Item	Plain meaning	Example
Inputs (what you enter)
Gross Rent	Total yearly rent at full occupancy	240,000
Other Income	Parking, laundry, storage, etc.	12,000
Vacancy %	Expected income lost to vacancy/non-pay	5
Operating Expenses	Taxes, insurance, repairs, utilities (owner), mgmt	95,000
Reserves (optional)	Annual allowance for future replacements	12,000
Loan Terms	Loan amount, rate, years (used to get yearly payment)	1.50M, 7.25%, 30y
Target DSCR	Lender minimum you aim to meet	1.25
Auto (calculator shows)
Effective Gross Income (EGI)	(Rent + Other) × (1 − Vacancy%)	239,400
NOI	EGI − (Operating Expenses + Reserves)	132,400
Annual Debt Service (ADS)	Total yearly loan payments (principal + interest)	100,000
DSCR	NOI ÷ ADS	1.32
Verdict (at a glance)
Status	Pass if DSCR ≥ Target; Borderline if within 0.05; else Fail	Pass (1.32 ≥ 1.25)
Max Loan (hint)	Largest loan keeping DSCR at Target	≈ 1.38M

How to Use the

Frequently Asked Questions

It computes the Debt Service Coverage Ratio and related metrics using plain-text formulas. DSCR = Net Operating Income divided by Debt Service. Cash flow margin = Net Operating Income minus Debt Service.
Keep both inputs on the same time basis. Example (annual): Net Operating Income 42 and Debt Service 24 → DSCR = 42 / 24 = 1.75; cash flow margin = 42 − 24 = 18. The same arithmetic applies if both are monthly.
Debt Service is the required principal plus interest due for the period. Net Operating Income is operating cash flow available to pay debt after operating expenses (for small-business lending this often aligns with EBITDA adjusted per lender guidance). Project-finance variants use “cash flow available for debt service” but the ratio structure is the same (cash flow over principal+interest).
Many lenders look for DSCR ≥ 1.20–1.25. U.S. SBA 7(a) policy explicitly requires at least 1.15 based on operating cash flow over debt service, with 1:1 on a global basis. Higher ratios indicate more cushion.
Results are computed exactly from your inputs and then rounded to two decimals using round-half-even (bankers’ rounding). Currency labels use ISO 4217 three-letter codes (e.g., USD, EUR).

Methodology & Sources

The calculator performs direct arithmetic with consistent periods: DSCR = Net Operating Income / Debt Service; Cash Flow Margin = Net Operating Income − Debt Service. “Debt Service” includes scheduled principal plus interest for the chosen period; “income” is operating cash flow available to service debt. For project-finance contexts the same structure applies with CFADS in the numerator. Results are rounded to two decimals using the NIST-recommended round-half-even rule; numbers are shown with SI-style formatting and currency codes per ISO 4217. Inputs must share the same time basis (monthly or annual). Edge cases: if Debt Service ≤ 0, DSCR is not reported; negative income yields DSCR < 0 and the margin equals income minus debt service. Category labels (e.g., ≥1.50 “very strong”) are interpretive and not a formal standard; minimums referenced (e.g., SBA 1.15) follow the cited policy.

Bibliography

U.S. Small Business Administration (2023). SOP 50 10 7.1 (Lender and Development Company Loan Programs) — U.S. Small Business Administration https://www.partneresi.com/wp-content/uploads/2023/10/SBA-SOP-50-10-7.1-Effective-11.15.23.pdf
Accessed 2025-10-20
World Bank Group Public-Private Partnership Handbook (definition of DSCR as CFADS / Debt Service) — World Bank https://documents1.worldbank.org/curated/en/099011524111939011/pdf/P17218315f839d0d18db4145d96004bea4.pdf
Accessed 2025-10-20
Barry N. Taylor; Chris E. Kuyatt; Ambler Thompson; Barry N. Taylor (eds., various editions) (2008). Guide for the Use of the International System of Units (NIST SP 811) — National Institute of Standards and Technology https://physics.nist.gov/cuu/pdf/sp811.pdf
ISO/TC 68 (2015). ISO 4217 — Currency codes — International Organization for Standardization https://www.iso.org/iso-4217-currency-codes.html

Debt Service Coverage Ratio Calculator (DSCR) Calculator

DSCR Calculator

Results

What It Means

Debt Service Coverage Ratio (DSCR) Calculator

Formula

How to Use the

Frequently Asked Questions

Methodology & Sources

Bibliography

DSCR Calculator

Results

What It Means

Debt Service Coverage Ratio (DSCR) Calculator

Formula

How to Use the

Frequently Asked Questions

Methodology & Sources

Bibliography

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