In the capital structure of a leveraged buyout or corporate borrower, the word "secured" can be misleading. Not all secured debt is equal. A second lien loan has legal recourse to the same collateral as a first lien (senior secured) loan — but in a restructuring or liquidation, it collects nothing until first lien lenders have been paid in full. Understanding the practical difference between the two is essential to understanding leveraged credit.
The intercreditor agreement: defining priority
The relationship between first and second lien lenders is governed by an intercreditor agreement — a legal contract that defines the exact waterfall and restricts what the second lien lender can do in a distress scenario. Key provisions typically include: a standstill period (often 90–180 days) during which second lien lenders cannot enforce their security or accelerate their debt even after a default; voting rights limitations in restructuring (first lien lenders usually need to consent to any restructuring plan); and a prohibition on second lien lenders receiving any economic recovery until first lien debt is satisfied.
Why would a borrower issue second lien debt?
Second lien loans allow a borrower to extract more total debt than first lien alone would support. Senior secured lenders typically lend up to 4–5x EBITDA; adding a second lien tranche can push total leverage to 6–7x EBITDA. For a private equity sponsor completing a leveraged buyout, this means a larger debt quantum, a lower equity cheque, and potentially a higher return on equity — if the business performs. The trade-off is a higher blended cost of debt and, in a restructuring, a creditor group (the second lien holders) who may resist the first lien lenders' preferred resolution.
Second lien vs mezzanine: the practical difference
Second lien debt is secured (it has a lien on assets, albeit junior to first lien). Mezzanine debt is typically unsecured, or secured only on equity in the holding company rather than the operating assets themselves. Both are junior to first lien, but in a liquidation, a secured second lien creditor with a direct lien on operating assets has a marginally stronger claim than an unsecured mezzanine lender — at least in theory. In practice, if enterprise value has declined enough to wipe out second lien, there is rarely anything left for mezzanine.