Is mezzanine debt or equity?

Debt in form, equity in behaviour. It is a loan with a maturity and a coupon, so it does not dilute ownership the way a share sale does, and it leaves when repaid. But it stands behind the senior lender, part of its return usually rides on the business succeeding, and its underwriting reads like an equity process. The honest description is the most expensive debt in the structure, bought to avoid selling the cheapest equity.

What is payment-in-kind interest?

Interest that accrues to the loan balance instead of being paid in cash, so part of the cost defers to maturity. The deferral preserves liquidity while the business grows, and it compounds: accrued interest itself bears interest, and the balance repaid at maturity is larger than the balance drawn. A split agreed in advance, with the option to toggle in a defined stress, is a structural feature. Deferral because the cash could not be paid is a signal, and lenders read it as one.

Why do mezzanine lenders want warrants?

Because the coupon alone does not pay for standing behind the senior lender. The warrant gives the lender a small share of the upside if the business performs, which is also the only outcome in which it costs the owner anything. Its size, strike, and what happens to it on an early repayment or a sale are all negotiable, and they belong in the negotiation with the same weight as the rate.

Mezzanine Financing Advisory

When the tranche earns its coupon.

The recurring cases share a shape: a defined use, a defined exit, and cash flow that carries the cash portion of the coupon through a downside year. An acquisition where senior capacity stops short of the price. A shareholder buyout where one branch of a family exits and the business, not a buyer, funds it. A growth investment too large for retained cash flow and too small to justify taking a sponsor.

The comparison the instrument exists for is against equity, not against the senior debt. A high coupon on a small tranche is expensive borrowing; the same capital raised by selling shares in a business the owner expects to grow can be more expensive permanently, and with no maturity date on which it leaves. Mezzanine is the answer for the owner who has done that comparison deliberately.

Where the fit fails, it fails on one of the three conditions. No defined exit means the bullet maturity is a cliff. No downside coverage means the cash coupon converts stress into default. And no genuine gap, because the senior market would have funded the need anyway, means the tranche is simply the most expensive money in a structure that did not require it.

What does mezzanine cost right now?

Counting cash and payment-in-kind interest together, junior capital and mezzanine for a borrower below $10m of EBITDA runs 13.00% to 16.00% (SPP Capital Partners, Market At A Glance, July 2026). Higher up the market the junior layer separates: subordinated debt at an all-in 11.0% to 13.5% for borrowers with $15m to $40m of EBITDA, and preferred equity at 13.5% to 16.5% at $40m to $100m (Lincoln International, Private Credit Snapshot, as of 1 May 2026).

Deferral is a normal feature of this market, not a warning sign in itself: payment-in-kind interest was being taken on 10.6% of direct lending loans as at 31 March 2026, the highest share since late 2020 (Lincoln International, published 7 May 2026). The warrant sits outside every one of those numbers, and it is paid only in the outcome where the business has succeeded.

The full grid, and the position of the tranche between senior debt and equity, is maintained in the linked positions below with every figure dated and attributed.

How a mezzanine raise runs.

The diligence feels closer to an equity process than a bank one, because the lender's risk is closer to equity. Expect the questions to run to customer concentration, management depth, and the credibility of the exit, alongside coverage. The materials have to answer those questions the way an equity buyer would ask them.

The negotiation concentrates on three terms that matter more than the coupon. The cash and payment-in-kind split, which sets how much of the cost hits liquidity now against how much compounds to maturity. The equity component, usually a warrant, whose size, strike, and treatment on prepayment or sale are all negotiable, and which is paid only in the outcome where the business has succeeded. And call protection, which prices the option to refinance early that most mezzanine borrowers fully intend to exercise.

The intercreditor agreement with the senior lender is where the tranche's real behaviour is written down: what the mezzanine lender can do in a stress, which payments can be blocked and for how long, and who controls an enforcement. Two structures with identical coupons and different intercreditor terms are different instruments.

What mezzanine lenders test.

Not the collateral. A subordinated lender assumes the security is spoken for by the senior facility and underwrites the stream instead: whether the business pays the cash coupon through a full cycle, and whether a realistic refinancing or sale repays the bullet, including the interest that has quietly accrued to it, at maturity.

The exit is tested as a plan, not a hope. A tranche that can only be repaid by a sale is priced as equity risk wearing debt documents, and honest preparation states the refinancing path at the outset rather than defending it in diligence.

The asymmetry explains the rest. The lender is exposed to most of the downside the shareholders face while capped at a coupon and a warrant on the upside, and every question it asks traces back to pricing that asymmetry. A borrower who presents the business the way the lender must underwrite it shortens the process and improves the terms.

Mezzanine, for the gap between senior debt and selling equity.