Definition
Senior debt is the top-priority loan in a property’s capital stack. It is usually secured by a first lien (first mortgage or deed of trust) on the real estate and gets paid back before mezzanine debt, preferred equity, and common equity. Because of its priority and collateral, senior debt typically carries the lowest cost of capital in the stack and the strongest control rights when things go wrong.
How Senior Debt Works
A senior lender advances funds against a property based on underwritten cash flow and collateral value. The loan is documented with a mortgage or deed of trust, note, and loan agreement, and often includes covenants such as DSCR tests, reserve requirements, reporting, and restrictions on additional debt.
Why It Matters
Senior debt determines the “ceiling†of leverage and often drives the entire investment’s risk profile. It also shapes outcomes in stress because senior lenders generally control enforcement (foreclosure, receiver, cash management, and major workout decisions), while junior capital is structurally subordinated.
Common Underwriting Metrics
- LTV (Loan-to-Value): loan amount ÷ property value.
- DSCR (Debt Service Coverage Ratio): NOI ÷ annual debt service.
- Debt Yield: NOI ÷ loan amount (a “lender’s cap rateâ€).
- Interest rate & amortization: fixed vs. floating, IO vs. amortizing schedule.
- Reserves & escrows: taxes/insurance, capex, TI/LC, replacements, interest reserve (construction).
Key Terms You’ll See in Senior Loan Docs
- First lien / first priority: senior lender is paid first from collateral proceeds.
- Covenants: operational and financial requirements (reporting, leasing limits, DSCR tests).
- Cash management: lockbox, springing lockbox, or cash sweep to protect the lender in stress.
- Events of default: payment default, covenant breaches, bankruptcy, unauthorized transfers, etc.
- Remedies: foreclosure, appointment of a receiver, UCC remedies (if applicable), enforcement of guarantees.
- Non-recourse carve-outs: limited recourse triggers for “bad acts†(fraud, waste, bankruptcy filing, etc.).
Senior Debt vs. Mezzanine Debt
Senior debt is secured by the property (first lien). Mezzanine debt is typically secured by a pledge of the borrower’s ownership interests (not a direct mortgage on the real estate) and is subordinate to the senior loan. The relationship between the two is governed by an intercreditor agreement.
Example
An apartment property generates $1,500,000 of NOI. A lender offers a $20,000,000 senior loan. Underwritten debt yield is:
- Debt Yield = 1,500,000 ÷ 20,000,000 = 7.5%
If the investment also has mezzanine debt and equity beneath it, the senior loan is still paid first from operating cash flow (per the loan terms) and from sale/foreclosure proceeds.
Common Pitfalls
- Over-leverage: a high senior loan can leave no margin for NOI volatility or capex surprises.
- Floating-rate risk: rising rates can crush DSCR unless hedged (caps/swaps) or underwritten conservatively.
- Hidden controls: cash management triggers and “consent rights†can constrain operations.
- Refinance risk: short maturities or tight extension tests can force paydown at the worst time.
- Reserve underestimation: inadequate escrows can lead to covenant defaults even when NOI is strong.