Commercial real estate loan underwriting is both an art and a science. While experienced lenders develop intuition for good deals over time, the foundation of every credit decision rests on a handful of key metrics that quantify risk and determine loan sizing. Master these metrics, and you'll have the tools to analyze any CRE deal that crosses your desk.
This guide covers the four essential metrics every commercial lender must understand: DSCR, LTV, Debt Yield, and Cap Rate. You'll learn how to calculate each one, understand their limitations, and see how they work together in real underwriting scenarios.
CRE Underwriting Overview
Commercial real estate underwriting evaluates two fundamental questions:
- Can the property support the debt? (Cash flow analysis)
- Is the lender protected if things go wrong? (Collateral analysis)
The four key metrics address these questions from different angles:
| Metric | Question It Answers | Category |
|---|---|---|
| DSCR | Can the property pay its mortgage? | Cash Flow |
| LTV | How much equity cushion exists? | Collateral |
| Debt Yield | What's the lender's return if foreclosed? | Cash Flow + Collateral |
| Cap Rate | Is the property fairly valued? | Valuation |
DSCR: Cash Flow Coverage
The Debt Service Coverage Ratio is the most fundamental metric in commercial lending. It directly measures whether the property generates enough income to pay its debt.
DSCR = Net Operating Income ÷ Annual Debt Service
DSCR Thresholds
| DSCR Range | Risk Assessment | Typical Lender Response |
|---|---|---|
| Below 1.00x | Negative cash flow | Decline unless transitional with reserves |
| 1.00x - 1.20x | Thin coverage | Require recourse or strong sponsor |
| 1.20x - 1.35x | Adequate coverage | Standard non-recourse eligible |
| Above 1.35x | Strong coverage | Best pricing and terms |
DSCR Strengths and Limitations
Strengths
- Directly measures ability to pay
- Easy to understand and calculate
- Universal across property types
- Incorporates actual financing terms
Limitations
- Rate-sensitive—changes with interest rates
- Can be manipulated with longer amortization
- Doesn't indicate collateral protection
- Depends on NOI accuracy
Calculate DSCR for any deal with our DSCR Calculator.
LTV: Collateral Protection
Loan-to-Value (LTV) measures the loan amount relative to property value, indicating how much equity cushion protects the lender if asset values decline.
LTV = Loan Amount ÷ Property Value × 100%
Property Value Considerations
LTV calculations depend on how "value" is determined:
- Appraised Value: Independent third-party appraisal (most common for bank loans)
- Purchase Price: Actual transaction price (used for acquisition loans)
- Stabilized Value: Value assuming full occupancy (construction/bridge loans)
- As-Is Value: Current condition value
Most lenders use the lower of appraised value or purchase price for acquisitions to prevent over-lending on inflated transactions.
Typical LTV Maximums by Lender Type
| Lender Type | Max LTV | Notes |
|---|---|---|
| Banks (Conservative) | 65-70% | Recourse typically required |
| Banks (Aggressive) | 70-75% | Strong sponsors, prime assets |
| CMBS | 70-75% | Non-recourse, standardized |
| Life Insurance | 60-70% | Conservative, Class A focus |
| Agency (Fannie/Freddie) | 75-80% | Multifamily only |
| SBA 504 | 85-90% | Combined first mortgage + SBA |
"LTV tells you how far values can fall before your collateral position is underwater. At 65% LTV, you need a 35% value decline to lose principal. At 80% LTV, only 20% decline wipes out your equity cushion."
— Commercial Credit Officer
Debt Yield: Rate-Independent Metric
Debt yield has become increasingly important, especially in volatile interest rate environments. Unlike DSCR, debt yield is unaffected by interest rates or amortization schedules.
Debt Yield = NOI ÷ Loan Amount × 100%
Think of debt yield as the return the lender would earn if they foreclosed and operated the property debt-free. A 10% debt yield means the lender's loan would generate a 10% cash return.
Why Debt Yield Matters
The DSCR Problem at Low Rates:
In 2021, with rates at 3.5%, a borrower could achieve 1.25x DSCR at 80%+ LTV. The same deal at 7% rates in 2024 might only achieve 1.00x DSCR at the same leverage.
Debt yield captures this risk: a 10% debt yield requirement limits leverage regardless of whether rates are 3% or 8%.
Typical Debt Yield Requirements
| Lender Type | Minimum Debt Yield |
|---|---|
| CMBS | 9-10% |
| Life Insurance | 8-10% |
| Banks | 8-9% (when used) |
Use our Debt Yield Calculator to analyze deals against lender requirements.
Cap Rate: Valuation Context
The capitalization rate (cap rate) measures unlevered return on a property and provides crucial context for valuation and investment analysis.
Cap Rate = NOI ÷ Property Value × 100%
Cap Rate and Risk
Cap rates reflect risk premiums—riskier properties require higher cap rates (lower prices) to compensate investors:
| Property Type | Typical Cap Rate Range | Risk Profile |
|---|---|---|
| Multifamily (Class A) | 4.5% - 5.5% | Lower risk |
| Industrial | 5.0% - 6.5% | Lower risk |
| Office (Suburban) | 6.5% - 8.0% | Moderate risk |
| Retail (Strip Center) | 6.5% - 8.5% | Moderate risk |
| Hotel (Select Service) | 8.0% - 10.0% | Higher risk |
Cap Rate Red Flags for Lenders
- Going-in cap rate significantly below market: Suggests the buyer may be overpaying, creating LTV risk if values normalize
- Compressed cap rate spread to Treasuries: Limited room for rate increases before negative leverage occurs
- Pro forma cap rate assumptions: Exit cap rate assumptions that are too aggressive can mask deal weaknesses
Calculate property valuations with our Cap Rate Calculator.
How the Metrics Work Together
In practice, lenders calculate all four metrics and the most restrictive metric determines maximum loan proceeds. This is called finding the "binding constraint."
Loan Sizing Example
Consider a $10,000,000 industrial property with $700,000 NOI seeking financing at 6.5%, 25-year amortization:
Lender Requirements:
- Maximum LTV: 70%
- Minimum DSCR: 1.25x
- Minimum Debt Yield: 9%
Maximum Loan by Each Constraint:
Even though LTV and debt yield would allow higher leverage, DSCR limits this deal to $6.87M (68.7% LTV). Use our Loan Sizing Calculator to instantly find binding constraints for any deal.
Standards by Property Type
Underwriting requirements vary significantly by property type based on historical performance and risk characteristics:
| Property Type | Max LTV | Min DSCR | Min Debt Yield | Key Risks |
|---|---|---|---|---|
| Multifamily | 75-80% | 1.20-1.25x | 8-9% | Rent control, supply |
| Industrial | 70-75% | 1.25x | 9% | Tenant concentration |
| Office | 65-70% | 1.30-1.35x | 10% | Remote work, rollover |
| Retail | 65-70% | 1.30-1.40x | 10% | E-commerce, tenant credit |
| Hotel | 60-65% | 1.40-1.50x | 11-12% | Volatility, management |
The Underwriting Process
A typical CRE loan underwriting process follows these steps:
- Initial Screening: Quick review of property type, location, sponsor, and requested terms to determine fit with lending parameters.
- Financial Analysis: Detailed review of historical financials, rent rolls, operating statements, and creation of underwritten NOI.
- Metric Calculation: Calculate DSCR, LTV, debt yield, and cap rate using underwritten figures and proposed loan terms.
- Sensitivity Analysis: Stress test the deal with vacancy increases, expense growth, rate increases, and value declines.
- Loan Sizing: Determine maximum loan proceeds based on binding constraint.
- Terms Structuring: Set pricing, covenants, reserves, and structure based on risk assessment.
- Credit Approval: Present to credit committee with recommendation.
Next Steps
Mastering these four metrics gives you the foundation for analyzing any commercial real estate loan. The best lenders don't just calculate these numbers—they understand how they interact and what they reveal about deal risk.
Ready to analyze your next deal?
- Loan Sizing Calculator — Find the binding constraint instantly
- DSCR Calculator — Analyze cash flow coverage
- Cap Rate Calculator — Evaluate property valuations
- Debt Yield Calculator — Calculate rate-independent metrics