Mezzanine debt is a hybrid financing instrument that sits between senior secured debt and equity in a company's capital structure — typically unsecured, bearing higher interest rates (12-20%+ PIK or cash), and frequently including warrant kickers or equity co-investment rights.
Mezzanine debt fills the gap between what senior lenders will advance and the equity a sponsor brings to an acquisition or growth transaction. It is subordinated to all senior debt but senior to preferred and common equity. Because mezz lenders take more risk than senior lenders (no collateral, last in line before equity), they demand higher returns — typically through a combination of cash interest, PIK (payment-in-kind) interest, and equity participation via warrants or equity co-investments. Structure: Mezzanine debt is typically issued as a term loan or subordinated notes with 5-7 year maturities. The 'all-in yield' target is usually 15-20% for middle-market deals. This blends: (1) cash interest (12-14%), typically at a fixed rate or SOFR+; (2) PIK interest (accrued and added to principal rather than paid currently — preserving borrower cash flow); (3) equity kicker — warrants to purchase equity at a nominal price, or direct equity co-investment alongside the deal's private equity sponsor. Mezzanine providers include specialized mezzanine funds, business development companies (BDCs), insurance companies, and some banks. The SEC regulates BDCs under the Investment Company Act of 1940. Mezzanine lending is typically exempt from FDIC-insured bank leveraged lending guidance (OCC/Fed/FDIC 2013 Leveraged Lending Guidance) when provided by non-bank funds. For growing businesses (outside PE buyout context), 'mezz' financing can fill capital gaps between senior SBA/bank loans and owner equity — enabling growth without full equity dilution. However, high all-in cost (15-20%+) means mezzanine is only appropriate when asset returns clearly exceed financing cost.
A warrant kicker gives the mezzanine lender the right to purchase equity in the company at a nominal price (often $0.01 per share or a pre-agreed nominal amount), exercisable at or after loan maturity. The warrant compensates the lender for the subordinated risk position and allows participation in upside if the company is sold at a premium. Warrants typically represent 5-15% equity on a fully diluted basis.
All mezzanine debt is subordinated debt, but not all subordinated debt is mezzanine. Subordinated debt is any debt with lower priority than senior debt. Mezzanine specifically refers to the hybrid layer with equity features (warrants, co-investment rights, PIK toggle). 'Subordinated debt' without equity features is sometimes called 'second lien' or 'junior term loan.'