What Is DSCR?
DSCR (Debt Service Coverage Ratio) is the ratio of a property's Net Operating Income to its annual debt service. It measures whether a property generates enough income to cover its mortgage payments. A DSCR of 1.25 means the property generates 25% more income than required to service the debt. A DSCR of 1.00 means it just breaks even — most lenders won't touch this. A DSCR below 1.00 means the property loses money before any debt service is paid, which is the top leading indicator of CRE distress.
DSCR is the single most important metric a Florida commercial lender uses to size loans, price rate, and structure reserves at closing. For the full DSCR formula, lender-by-lender minimums, worked Florida acquisition and refinance examples, and how DSCR drives CREDDS distress detection, read the complete DSCR guide for Florida commercial investors.
How to Use This DSCR Calculator
The DSCR calculator takes two inputs and returns one number, plus an indicator of which loan programs your deal qualifies for.
Input #1: Net Operating Income (NOI). This is the property's annual income after operating expenses but before debt service, depreciation, and income taxes. Start with gross rental income (annual rents at scheduled rates), add other property income (parking, laundry, storage, antenna leases), and subtract all operating expenses: property taxes, insurance, utilities, property management, repairs and maintenance, replacement reserves, professional fees, and any other recurring operating cost. The result is NOI. Do not subtract mortgage payments — debt service is the second input. Do not subtract depreciation or capital improvements — those are below the NOI line.
Input #2: Annual Debt Service. This is the total of all principal and interest payments due on the loan over a 12-month period at the loan's rate and amortization schedule. For a typical Florida commercial loan amortized over 25 or 30 years at a fixed rate, monthly P&I times 12 equals annual debt service. For an interest-only loan, annual debt service equals the loan amount times the interest rate. For variable-rate or floating-rate loans, calculate annual debt service at the current rate plus a stress-test scenario at rate+100bps or rate+200bps to confirm the deal survives potential rate moves.
The calculation: DSCR = NOI ÷ Annual Debt Service. The calculator runs this instantly and tells you which lender programs your deal qualifies for at that DSCR level.
How DSCR Maps to Florida Lender Thresholds
The DSCR your calculator returns maps directly to Florida lender programs:
- DSCR 1.40+: Hotel CMBS, life-company permanent, most aggressive bank balance-sheet pricing
- DSCR 1.25–1.40: Agency multifamily (Fannie/Freddie), CMBS conduit, bank permanent, SBA 504/7(a)
- DSCR 1.20–1.25: CMBS conduit, SBA 7(a) at standard pricing
- DSCR 1.11–1.20: HUD 223(f) refinance (1.11 floor), most DSCR portfolio loan products
- DSCR 1.00–1.11: Bridge financing or DSCR portfolio loans with stabilization plan
- DSCR below 1.00: Distress — not financeable except via hard money or restructuring
For details on each program and Florida-specific overlays (coastal insurance crisis impact, I-4 corridor preferences, post-2022 credit-tightening), see the DSCR explainer and the full DSCR glossary entry.
Sample DSCR Scenarios for Florida Deal Sizes
Sample #1: $750,000 Polk County Small-Balance Multifamily
NOI: $54,000/yr ($600/unit/mo gross, 35% expense ratio)
Loan Request: $525,000 (70% LTV) at 7.25% / 25 years
Annual Debt Service: $45,540
DSCR: 1.19— routes to DSCR portfolio loan or community-bank small-balance program
Sample #2: $1,500,000 Tampa MSA Industrial Acquisition
NOI: $135,000/yr ($8.25/SF NNN, 95% occupied)
Loan Request: $975,000 (65% LTV) at 7.00% / 25 years
Annual Debt Service: $82,800
DSCR: 1.63— qualifies cleanly for CMBS, bank permanent, life-company; earns 15–30 bps rate relief
Use the calculator above with your own deal's NOI and debt service to see exactly where your deal lands — and which programs to target with your lender outreach.
Pre-Bid Underwriting: How DSCR Should Drive Your Offer
The right workflow for Florida commercial deals is to underwrite to DSCR before you make an offer. Run the calculator with the broker package's stated NOI and your target loan terms. If the resulting DSCR falls below the lender program you're targeting, you have three options: lower your bid, increase your equity contribution to shrink the loan, or change loan programs. Discovering 30 days into due diligence that your deal cannot be financed at your bid price is the single most common reason Florida commercial transactions die between LOI and close.
Build a 0.10 DSCR cushion above the lender minimum into your pre-bid underwriting to absorb rate moves during the pricing period, NOI variance from tenant turnover, and Florida-specific insurance shocks. For coastal hurricane-exposed assets, expand the cushion to 0.15 to account for the 30–120% insurance premium increases that have hit Florida coastal CRE over the past 36 months.
For the full DSCR formula, lender-program minimums, bridge-to-permanent escalation worked examples, distress-detection role in CREDDS, and Florida-specific insurance crisis impact, see the complete DSCR guide for Florida commercial investors. For modeling your full closing-cost stack alongside DSCR, use the Florida CRE Closing Cost Calculator. For solving maximum supportable loan from DSCR and LTV simultaneously, use the Loan Sizer Calculator.
Frequently Asked Questions
How do I use this DSCR calculator?
Input two numbers: (1) the property's Net Operating Income (NOI) — gross rents plus other income, minus all operating expenses, before debt service and taxes — and (2) the annual debt service — the sum of principal and interest payments over a 12-month period at your loan's rate and amortization. The calculator divides NOI by Annual Debt Service and instantly returns your DSCR, plus an indicator of which loan programs (agency, CMBS, bank, bridge, DSCR portfolio, HUD, SBA) your deal qualifies for at that DSCR level. For Florida-specific calibration, target a pro-forma DSCR of at least 1.30 to absorb rate moves, NOI variance, and Florida insurance shocks.
What DSCR should I target for a Florida commercial deal?
For Florida commercial deals in 2025–2026, target a DSCR of 1.25 or higher at funding to qualify for the broadest range of permanent loan products. Target 1.30+ on coastal hurricane-exposed assets where insurance volatility can compress NOI 3–8% over short periods. For bridge financing on transitional Florida assets, the in-place DSCR can be as low as 1.00–1.10 if the borrower presents a credible stabilization plan demonstrating pro-forma DSCR of 1.25+ within 18–36 months. For pre-bid underwriting, build a 0.10 DSCR cushion above the lender minimum to absorb rate moves and NOI variance during the pricing period.
Can I use this DSCR calculator for short-term rentals (STRs)?
Yes, but with caution. Florida STRs (Airbnb/VRBO/short-term vacation rentals) require NOI calculated from trailing 12-month actual booking revenue minus all operating expenses including platform fees, cleaning, dynamic pricing software, hospitality license fees, tourist development tax compliance, and elevated insurance premiums. Most institutional lenders apply a 15–25% haircut to STR revenue when calculating qualifying NOI for DSCR purposes, recognizing the higher revenue volatility vs traditional long-term leases. For DSCR loan products specifically marketed to STR investors, the qualifying NOI is often the STR trailing revenue minus operating expenses without the institutional haircut — but expect tighter DSCR floors (1.10–1.20 instead of 1.00–1.10) to compensate for revenue risk.
How does this DSCR calculation map to Florida lender thresholds?
The calculator returns your raw DSCR, which maps to Florida lender thresholds as follows: DSCR 1.40+ qualifies for hotel CMBS, life-company permanent, and the most aggressive bank balance-sheet pricing. DSCR 1.25–1.40 qualifies for agency multifamily (Fannie/Freddie), CMBS conduit, bank permanent, and SBA 504/7(a). DSCR 1.20–1.25 qualifies for CMBS conduit and SBA 7(a) at standard pricing. DSCR 1.11–1.20 qualifies for HUD 223(f) refinance (1.11 floor) and most DSCR portfolio loan products. DSCR 1.00–1.11 routes to bridge financing or DSCR portfolio loans with appropriate stabilization plan. DSCR below 1.00 indicates distress — the property cannot cover debt service from operating income and is not financeable except through hard money or restructuring.
Why does this DSCR calculator only ask for NOI and debt service, not the full income statement?
DSCR is a single-input metric (NOI ÷ Annual Debt Service) by design — the entire commercial real estate financing industry uses this exact two-input formula. The calculator stays focused on DSCR specifically. If you need to calculate NOI from gross rents, vacancy, and operating expenses, use the calculator alongside our Cap Rate Calculator (which decomposes NOI line-by-line) or the full Florida Closing Cost Calculator (which integrates NOI build-up, debt service modeling, and the full closing-statement waterfall). For most pre-bid underwriting, you already have NOI from the broker package and Annual Debt Service from your lender quote — input both and get an immediate DSCR answer.
Does the DSCR calculator work for refinances as well as acquisitions?
Yes — DSCR is identical for both refinances and acquisitions. The formula doesn't care whether the loan is purchase money or a refinance: NOI ÷ Annual Debt Service at the new loan's rate and amortization. For refinances specifically, run two DSCR calculations: (1) DSCR at current actual NOI to confirm you clear the takeout lender's floor today, and (2) DSCR at conservative pro-forma NOI to stress-test against possible NOI compression from tenant turnover, rate resets, or Florida insurance increases over the loan term. For Florida bridge-to-permanent refinances specifically, the stabilized DSCR projection is what matters most — most failed Florida bridge takeouts are caused by a stabilization plan that delivers a stabilized DSCR below the permanent lender's floor.
How does DSCR interact with LTV on Florida commercial loans?
DSCR and LTV are two parallel lender constraints. Both must be satisfied — whichever is more restrictive becomes the binding constraint on loan size. In 2025–2026 Florida commercial credit conditions with normalized rates, DSCR is almost always the binding constraint. Example: a deal that pencils at 70% LTV ($700,000 loan on $1M property) may only support a DSCR-constrained loan of $625,000 if NOI is tight relative to debt service at current rates. The lender will lend the lower of the two amounts. Use the calculator to identify your DSCR-constrained loan amount, then compare to your LTV-constrained loan amount, then take the smaller number as your actual lendable amount.
What if my DSCR is below 1.0 — is the deal dead?
No, but it changes the financing path. A DSCR below 1.0 means the property currently loses money before debt service — it cannot be financed by conventional permanent lenders (agency, CMBS, bank, life-company). Three viable paths remain: (1) Bridge financing with a stabilization plan demonstrating projected DSCR of 1.25+ within 18–36 months, with interest reserves funded at closing to cover the gap; (2) Hard money or private lending at higher rates and shorter terms (12–24 months) priced for the risk; or (3) Restructuring the deal — bring more equity to reduce loan size, request seller financing, or assemble a partnership that reduces required leverage. For Florida transitional assets specifically, bridge with interest reserves is the most common path. For deeply distressed properties (DSCR below 0.80), the deal usually requires a discount-to-payoff negotiation with the existing lender before any new financing is viable.