AtlasCalcsUtility Calculation Suite
2026-09-21 7 min read

Real Estate DSCR Calculator

The debt service coverage a lender will compute on the property for a property. Live calculator with worked steps and charts.

Calculator

Purchase Price Help
$

The price you pay, before closing costs.

Down Payment(%) Help
%

Investment loans typically require 20–30% down.

Interest Rate(%)
%
Loan Term(years)
years
Monthly Rent Help
$

Gross scheduled rent before vacancy.

Vacancy & Credit Loss(%) Help
%

Share of scheduled rent lost to turnover and non-payment.

Property Tax (Annual)
$
Insurance (Annual)
$
Maintenance & Repairs(%) Help
%

Share of effective income budgeted for repairs.

Property Management(%) Help
%

Share of collected rent charged by the manager.

Advanced options (3)
Other Monthly Income Help
$

Laundry, parking, storage, late fees, pet rent.

Utilities (Annual, Landlord-Paid)
$
Other Expenses (Annual)
$

This property calculator runs on a full rental pro-forma: rent is annualised and reduced by vacancy, every operating expense is itemised to reach NOI, and the loan amortises monthly at the rate entered. Results update live as you type.

Amortization schedule

Balance Interest Payment
View:
YearInterestPrincipalEnding Balance
1$15,677.60$2,285.57$222,714.43
2$15,512.37$2,450.80$220,263.63
3$15,335.20$2,627.96$217,635.67
4$15,145.23$2,817.94$214,817.73
5$14,941.52$3,021.65$211,796.08
6$14,723.08$3,240.08$208,555.99
7$14,488.86$3,474.31$205,081.68
8$14,237.70$3,725.47$201,356.21
9$13,968.38$3,994.78$197,361.43
10$13,679.60$4,283.57$193,077.86
11$13,369.94$4,593.23$188,484.64
12$13,037.90$4,925.27$183,559.37
13$12,681.85$5,281.32$178,278.05
14$12,300.06$5,663.11$172,614.94
15$11,890.68$6,072.49$166,542.45
16$11,451.69$6,511.47$160,030.98
17$10,980.98$6,982.19$153,048.79
18$10,476.24$7,486.93$145,561.86
19$9,935.01$8,028.16$137,533.69
20$9,354.65$8,608.52$128,925.18
21$8,732.34$9,230.83$119,694.35
22$8,065.04$9,898.13$109,796.22
23$7,349.50$10,613.66$99,182.56
24$6,582.24$11,380.93$87,801.63
25$5,759.51$12,203.65$75,597.98
26$4,877.31$13,085.86$62,512.12
27$3,931.33$14,031.83$48,480.29
28$2,916.97$15,046.20$33,434.09
29$1,829.28$16,133.89$17,300.21
30$662.96$17,300.21$0.00

Results

Caution

Debt Service Coverage Ratio

1.19x

Thin coverage — little margin for error

Net Operating Income

$21,387

Annual Debt Service

$17,963

Surplus After Debt Service

$3,424

Coverage Margin

19.06%

Max Payment at a 1.25x DSCR

$1,426

The monthly payment most lenders will underwrite.

Approx. Max Loan at 1.25x

$9

An interest-only approximation for the payment above.

Cap Rate

7.13%

Debt Yield

9.51%

NOI ÷ loan — the lender’s unlevered floor.

Live results update as you type — currently showing debt service coverage ratio of 1.19x. Replace the defaults with your own rent roll, tax bill and insurance quote for an exact comparison.

Visualizations

NOI vs Debt Service

21,387Net operating income
17,963Annual debt service

Where the Effective Income Goes

Operating expenses26%
Vacancy & credit5%
Debt service58%
Cash flow11%

Loan Balance Over the Term

DSCR

1.2x
02.5

Formula

The debt service coverage ratio is how many times the property’s income covers its mortgage payment — the single number most income-property lenders underwrite to.

DSCR = NOI ÷ Annual debt service

Variables

SymbolNameUnitDescription
NOINOI$/yrIncome after operating expenses
DSDebt service$/yrTwelve monthly payments
DSCRCoveragexNOI divided by debt service

Explanation

At 1.25x, income exceeds payments by 25% — the conventional lender minimum. Below 1.0x the property loses cash monthly; above 1.5x there is real margin for a bad year.

Step-by-Step Calculation

Follow each step to understand how the result is calculated from your inputs.

Step 1

Size the loan from the purchase price and the down payment.

Loan = price × (1 − down payment %)
Purchase price:$300,000
Down payment:25.00%
Intermediate: $300,000 × (1 − 0.25)
Result: $225,000 loan, $75,000 down
Step 2

Amortise the loan to find the monthly payment and annual debt service.

P = L × i ÷ (1 − (1 + i)^−n)
Loan:$225,000
Rate:7.00%
Term:30 years
Intermediate: i = 0.005833333333333334 per month, n = 360 payments
Result: $1,496.93/month ($17,963/year)
Step 3

Annualise the rent and deduct vacancy and credit loss.

EGI = (rent × 12 + other income) × (1 − vacancy %)
Monthly rent:$2,600.00
Vacancy:5.00%
Intermediate: $31,200 − $1,560
Result: $29,640 effective gross income
Step 4

Subtract every operating expense to reach net operating income.

NOI = EGI − taxes − insurance − maintenance − management − utilities − other
Effective income:$29,640
Operating expenses:$8,253
Intermediate: $29,640 − $8,253
Result: $21,387 NOI
Step 5

Compute dscr from the figures above.

DSCR = net operating income ÷ annual debt service
NOI:$21,387
Debt service:$17,963
Cash invested:$75,000
Intermediate: DSCR = 1.19x
Result: 1.19x
Final Answer
1.19x

Worked Examples

See how the calculator works with different scenarios.

Scenario

The real estate dscr calculator run on the values above, showing the full calculation path rather than only the answer.

Inputs

Price:300000
Rent Monthly:2600
Down Payment Pct:25
Rate:7

Calculation

1. Size the loan from the purchase price and the down payment. → $225,000 loan, $75,000 down 2. Amortise the loan to find the monthly payment and annual debt service. → $1,496.93/month ($17,963/year) 3. Annualise the rent and deduct vacancy and credit loss. → $29,640 effective gross income 4. Subtract every operating expense to reach net operating income. → $21,387 NOI 5. Compute dscr from the figures above. → 1.19x

Result

Debt Service Coverage Ratio: 1.19x

Interpretation

$21,387 of NOI against $17,963 of annual debt service is 1.19x coverage — below the 1.25x common minimum. The payment a 1.25x floor supports is $1,426 a month.

Understanding Your Result

Your Result: Debt Service Coverage Ratio: 1.19x

Typical range: Commercial lenders typically require 1.20–1.35x for stabilised property and 1.40x+ for value-add; agency multifamily often underwrites to 1.25x at origination.

What This Means

At 1.25x, income exceeds payments by 25% — the conventional lender minimum. Below 1.0x the property loses cash monthly; above 1.5x there is real margin for a bad year.

Why It Matters

$21,387 of NOI against $17,963 of annual debt service is 1.19x coverage — below the 1.25x common minimum. The payment a 1.25x floor supports is $1,426 a month.

Professional Interpretation

$21,387 of NOI against $17,963 of annual debt service is 1.19x coverage — below the 1.25x common minimum. The payment a 1.25x floor supports is $1,426 a month.

How this is calculated

The debt service coverage ratio is how many times the property’s income covers its mortgage payment — the single number most income-property lenders underwrite to.

What drives the result

The pro-forma method: annualise the rent, deduct vacancy to reach effective gross income, subtract operating expenses to reach net operating income, then subtract debt service to reach cash flow. Each layer answers a different question — value (cap rate), lender safety (DSCR) and investor return (cash-on-cash).

Recommendations

  • •If the DSCR is thin, the lever to pull is income: raise rents toward market or add units, rather than stretching the amortisation.
  • •Ask your lender which DSCR floor they underwrite to before you model the loan size.

Educational Content

Introduction

Rental analysis starts with one year of operations: scheduled rent, vacancy and credit loss, every operating expense, and the debt payment. NOI is what remains for the owner; everything else — cap rate, cash flow, DSCR, cash-on-cash — is NOI viewed from a different angle.

Concept Explanation

The pro-forma method: annualise the rent, deduct vacancy to reach effective gross income, subtract operating expenses to reach net operating income, then subtract debt service to reach cash flow. Each layer answers a different question — value (cap rate), lender safety (DSCR) and investor return (cash-on-cash).

Applications

▸Screening a listing against your price and return requirements in minutes
▸Comparing two or three candidate properties on the same pro-forma assumptions
▸Preparing a lender-ready one-year operating statement for a loan request
▸Setting rents and budgeting expenses for a property you already own

Benefits

  • •One consistent model across every property, so comparisons are fair
  • •Forces every expense to be named and budgeted rather than ignored
  • •Separates the property’s performance from the financing around it

Limitations

  • •A one-year pro-forma cannot capture capital expenditures that arrive in lumps — roofs, systems and exteriors need their own reserve
  • •Actual vacancy and expense ratios vary by market and management quality; a single assumption hides that spread
  • •The model assumes the rent roll is at market; in-place rents below market flatter the deal

Best Practices

  • •Build the pro-forma from your own quotes — insurance, taxes and management — not the seller’s summary
  • •Stress the deal: rent down 5%, vacancy up 5% — if it still pays, it will survive a soft year
  • •Fund a capital-expenditure reserve of about 5% of rent before calling any cash flow "positive"

Common Misconceptions

Myth: NOI is the profit the owner pockets.
Truth: NOI comes before the mortgage payment; only cash flow (NOI − debt service) reaches the owner’s bank account.
Myth: A property with positive cash flow is always a good deal.
Truth: Positive cash flow on an overpriced building can still be a worse investment than the same cash in an index fund — compare returns, not just sign.
Myth: Operating expenses are optional line items.
Truth: Vacancy, maintenance and management are real costs even when self-managed; underwriting them at zero inflates the price you can justify.

Practical Tips

  • •Size your loan from the DSCR, not from your maximum down payment — the property qualifies, not you
  • •Test DSCR at today’s rate plus one point if you plan to refinance within the hold

Common Mistakes

Computing DSCR on gross rent.
Lenders use NOI after a vacancy and management load; so should you.
Assuming the DSCR you close with lasts.
Rate resets and rent stagnation both compress coverage over time.

Assumptions

This calculator makes the following assumptions to provide estimates:

Amortising debt: Debt service includes principal and interest on a fixed-rate schedule.

Limitations

Be aware of these limitations when using this calculator:

Limitation: A one-year pro-forma cannot capture capital expenditures that arrive in lumps — roofs, systems and exteriors need their own reserve
Limitation: Actual vacancy and expense ratios vary by market and management quality; a single assumption hides that spread
Limitation: The model assumes the rent roll is at market; in-place rents below market flatter the deal

Frequently Asked Questions

Answers to common questions about this calculator.

What DSCR do lenders require?
Most income-property lenders require 1.20–1.25x; DSCR-based loans are sized to hit a target ratio (often 1.20–1.30x) at the quoted rate.
Who uses the real estate dscr calculator?
It is used by rental investors screening and pricing deals, by owner-operators budgeting expenses and rents, and by agents, lenders and advisers sanity-checking the numbers before money moves. It sits in the Returns & Metrics group of the Real Estate Investing section of Atlascalcs.
How accurate is the real estate dscr calculator?
Every figure follows from the inputs using standard property underwriting mathematics, so it is accurate to the quality of the values you enter. Lenders, appraisers and tax assessors each apply their own adjustments, so expect small differences against formal documents.
Do I need to sign up or pay to use this calculator?
No. Every Atlascalcs calculator is free, runs entirely in your browser and never asks for an account. Nothing you enter is uploaded or stored.
Can I use these numbers in a formal valuation or loan application?
The calculator is an underwriting aid, not an appraisal or a lender offer. Lenders and appraisers apply their own adjustments, so treat the output as a disciplined estimate to bring to those conversations.
How do I choose realistic inputs?
Pull rent from comparable leases, property tax from the current assessment, insurance from a quote, and management and maintenance from what operators in your market actually pay. Seller pro-formas are marketing documents.

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Related Guides

Deepen your understanding with these educational resources.

Glossary

Technical terms used in mortgage calculations explained in plain language.

Debt Service Coverage Ratio (DSCR)
NOI divided by annual debt service. Lenders typically require 1.20–1.25x on income property.
Net Operating Income (NOI)
Effective gross income minus operating expenses, before debt service and income tax. The core measure of a property’s earning power.
Debt Yield
NOI divided by loan amount — a lender’s leverage-independent safety metric, usually 10%+.

Authoritative References

Trusted sources and standards referenced by this calculator.

Applicable Standards

Level-payment amortisation, payments assumed in arrearsIncome and expenses annualised; percentages entered as annual ratesStraight-line depreciation per IRC §168 recovery periodsMoney rounded for display only; all calculations run at full precision

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Page Information

Last Updated:

2026-09-21

Version:

2.0.0

License:

Free to use for educational and professional purposes.