Commercial Mortgage Underwriting: DSCR Hurdle Rates, SOFR Floors, and Rate Caps
Underwriting criteria for commercial real estate debt, Debt Service Coverage Ratios (DSCR >= 1.25x), debt yields, and interest rate cap reserves.
Commercial Mortgage DSCR Engine
Compute maximum loan proceeds based on NOI and debt yields
Empirical Analysis & Findings
## Commercial Debt Structuring in Modern Capital Markets
Commercial lenders have tightened debt sizing criteria, evaluating properties on the constraining triad: Loan-to-Value (LTV), Debt Service Coverage Ratio (DSCR), and Debt Yield.
### Constraining Sizing Math
Given a commercial office/multifamily asset with $1,200,000 Net Operating Income (NOI):
- **LTV Constraint (65% on $16M Appraised Value)**: $10,400,000 maximum loan.
- **DSCR Constraint (1.25x at 7.25% Constant)**: $1,200,000 / (1.25 * 0.0725) = $13,241,379.
- **Debt Yield Constraint (Minimum 10.0% Debt Yield)**: $1,200,000 / 0.10 = $12,000,000.
The lowest of the three sets the maximum loan proceeds. In this example, LTV governs at $10,400,000.
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Frequently Asked Questions
What is the minimum DSCR required by agency lenders on commercial multifamily?
Fannie Mae and Freddie Mac mandate a minimum 1.25x DSCR for standard tier assets and 1.35x for secondary or tertiary market collateral.
How is debt yield calculated and why do lenders prefer it to cap rates?
Debt Yield = (Net Operating Income / Total Loan Amount) * 100%. Lenders rely on debt yield because it is independent of market capitalization rates and interest rate fluctuations.
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