Key takeaways
- A unitranche is one loan with one blended price; a 1L/2L stack is two loans ranked against each other under an intercreditor agreement.
- Total leverage can be identical. What changes is who absorbs losses first, how amendments get done and who controls a workout.
- In a unitranche, 'senior' describes the lien, not the risk: size it against total leverage, because there is no junior tranche beneath you.
Two ways to lend the same money
A sponsor needs to borrow to buy a company. It can raise that debt as one loan with one lender group and one price, a unitranche, or as two loans ranked against each other: a first-lien term loan and a second-lien term loan. On a summary page the two can look identical: the same total debt, the same maturity, the same borrower. Underneath, almost everything a lender cares about is different.
The choice decides who absorbs losses first, how the price is set, how many parties have to agree when the company needs a change to its loan, and who is in control if it gets into trouble. A credit memo on either structure has to show the analyst understands which of those risks the lender is actually taking.
The two structures
Unitranche. A single term loan under one credit agreement, with one set of covenants and one blended interest rate. It is usually held by one direct lender or a small club. It is often paired with a small revolving credit facility that ranks ahead of the term loan in a default (a 'first-out' or super-senior revolver). Lenders sometimes split the term loan's economics privately among themselves in an agreement among lenders, so that one group is repaid first and another takes more risk for more spread, while the borrower still sees a single loan.
First lien / second lien (1L/2L). Two separate loans with separate credit agreements. Both are secured, but the first lien has the first claim on the collateral and the second lien is repaid only after the first lien is made whole. An intercreditor agreement sets the rules between them: who can enforce, when, and what the second lien can and cannot do in a restructuring. The tranches are often held by different investors with different return targets.
| Item | Unitranche | 1L / 2L |
|---|---|---|
| Loans | One term loan (plus a revolver) | Two term loans (plus a revolver) |
| Documents | One credit agreement; lenders may add an agreement among lenders | Two credit agreements and an intercreditor agreement |
| Pricing | One blended spread | Lower spread on the 1L, higher on the 2L |
| Who decides on amendments | One lender group | Each tranche, within the intercreditor limits |
| Who takes losses first | Shared across the loan (unless lenders agree otherwise among themselves) | The 2L, before the 1L |
Typical features; individual deals vary.
What changes in the price
A unitranche lender pricing a stack is, in effect, quoting a weighted average of what the first and second lien would cost separately, then adjusting for what it offers the sponsor: certainty, speed, one counterparty and no need to sell the loan to a wider market.
| Tranche | Leverage | Spread over SOFR |
|---|---|---|
| First lien | 4.0x | 450 bp |
| Second lien | 1.5x | 800 bp |
| Weighted blend (unitranche equivalent) | 5.5x | ≈ 545 bp |
Illustrative example, not market data: (4.0 × 450 + 1.5 × 800) ÷ 5.5 ≈ 545 bp.
Whether the borrower pays more or less than that blend depends on the market and the deal. The point for an analyst is the mechanics: a unitranche spread compresses two risk layers into one number, so a lender comparing it with a first-lien-only deal is not comparing like with like.
Why sponsors choose one or the other
- Certainty and speed. One lender group can commit to the whole amount, so there is no risk that a second-lien tranche fails to find buyers.
- Simpler documents. One agreement and one set of covenants to negotiate and to live with.
- Cost. In some markets the cheapest combination of a first and second lien prices below a unitranche; in others the unitranche wins.
- Relationship. One counterparty to call when the business needs an amendment, rather than two groups with different interests.
What it means for the lender
A first-lien lender in a 1L/2L structure has a junior lender beneath it. If the business stumbles, the second lien's claim is a cushion: losses reach the first lien only after the second lien has been wiped out. A unitranche lender has no such cushion. Everything below it is equity.
Control cuts the other way. In a unitranche, the lender group decides on amendments and, in a default, on enforcement, without negotiating with a separate junior class. In a 1L/2L structure, the intercreditor agreement shapes every step of a workout, and a second-lien holder with different economics can slow things down.
“In a unitranche, 'senior' describes the lien, not the risk. Size the loan against total leverage, because there is no junior tranche beneath you.”
What to check in the memo
- Leverage at the right level. For a unitranche, total leverage is the lender's leverage. For a first lien, show first-lien leverage and total leverage, and say how much junior debt sits beneath you.
- Recovery. Build the downside case to an enterprise value and walk it down the stack. The revolver usually ranks first; a first-out revolver reduces what the term lenders recover.
- Documents. Note who controls amendments and enforcement, and for a 1L/2L stack, the intercreditor terms that matter in a default.
- Price for the layer you hold. Compare a unitranche spread with blended 1L/2L pricing, not with a first lien alone.
Keep going
- Case: Northfield PackagingMembers · Intermediate · Direct lending
- Case: Copperline HVAC Services: a $150M buyout loan and a $40M add-on facilityMembers · Foundational · Direct lending
- Guide: Private credit and direct lendingMembers
- Guide: How to build the credit modelMembers
- Foundations: Debt, lending to the businessMembers
Educational content; not investment advice. Figures in exhibits are illustrative unless a source is given.