Glossary · Debt and financing

Mezzanine debt

Also called Mezzanine, Mezzanine loan, Subordinate debt.

Mezzanine debt sits between the senior mortgage and the equity: repaid after the senior loan and before the equity, priced above the mortgage and below equity, and normally secured by a pledge of the ownership interests rather than by a mortgage on the property.

Updated August 6, 2026 · All terms

How it works

Its function is to push total leverage past what a senior lender will do without giving away ownership economics to a preferred equity investor or a joint venture partner. A senior at 65 percent plus mezzanine to 78 percent replaces thirteen points of equity with debt priced below a target equity return, which is accretive when the deal performs and painful when it does not.

The security structure is what matters in a workout. Because a mezzanine lender holds a pledge of the equity interests rather than a mortgage, it forecloses on the ownership entity rather than on the real estate, which is faster than a mortgage foreclosure and leaves the senior loan undisturbed. An intercreditor agreement between the two lenders sets out who may do what and when, and it is negotiated between them rather than with the borrower.

The arithmetic to watch is combined coverage. Senior debt service plus mezzanine interest measured against the same NOI produces a number well below the senior lender's own covenant, and on a low cap rate asset it can fall below 1.00x, which means the mezzanine is being serviced out of reserves or out of the sponsor's pocket rather than out of the property. Some structures accrue part of the coupon instead of paying it, which relieves the cash flow and grows the balance the eventual refinance has to clear.

Formula

Combined DSCR = NOI / (senior debt service + mezzanine debt service). Blended cost = combined debt service / total debt
  • Mezzanine is normally interest only for its term, and some or all of the coupon may accrue rather than pay currently
  • Total leverage across both loans is the combined loan-to-value, sometimes written CLTV
  • The senior lender has to permit it, and the terms live in an intercreditor agreement rather than in the borrower's loan documents

Worked example

Thirteen more points of leverage, and what they cost

The sample property. Senior $36,335,000 at a 6.35 percent interest-only constant, mezzanine taking total debt to 78 percent of the $55,900,000 price at an 11 percent current-pay rate. NOI $3,020,000, total uses $56,900,000.

Total debt at 78% of price$43,602,000
Mezzanine loan$7,267,000
Mezzanine interest$799,370
Combined annual debt service$3,106,642
Equity required, down from $20,565,000$13,298,000
Combined debt service coverage0.97x

Coverage on the combined stack is below 1.00x, so the property does not cover its own debt service in year one and the shortfall has to be funded from somewhere else. The blended cost of the two loans is 7.13 percent against a 5.40 percent going-in cap rate, which is 173 basis points of negative leverage before a dollar of principal is repaid.

Conventions worth knowing

  • Ask whether the coupon is current pay or accrues. Accrued interest compounds and grows the balance a refinance has to clear.
  • Read the intercreditor agreement's cure rights. Whether the mezzanine lender may cure a senior default, and for how long, is what decides a bad year.

The common mistake

Reporting the senior coverage as the deal's coverage

A summary quoting 1.31x on the senior loan while a mezzanine tranche sits behind it is describing one lender's position rather than the property's. The number that matters to the equity is the combined coverage, which on this stack is 0.97x, and the gap between the two is the whole question of whether the deal distributes anything. Model every tranche in the cash flow, report coverage on combined debt service, and test what a covenant breach on either loan does to the other.

Related terms

Every figure, traced to its source

Altyst computes these in exact decimal arithmetic, not with a language model, and clicking any number shows the formula behind it.