The unitranche reflex
Unitranche has become the default for mid-market buyouts, taking roughly seven in ten UK alternative-lender structures. The single-tranche convenience has a price, and the trade-off is sharpest at the lower-mid-market level.
- Dated
- 17 February 2022
- Desk note
- Dated to the data
- Updated
- 17 February 2022
- Reading
- 7 min
Managing Director
By late 2021, unitranche accounted for roughly 70% of UK alternative-lender deal structures, up from 58% in early 2020. It became the mid-market default because it is fast and certain: one lender, one document, one rate. But that convenience is priced in, and below £15m a borrower can end up paying a blended all-in for flexibility they will never draw on. The structure should follow the cash-flow profile, not the fashion.
A unitranche is a single debt facility that merges what used to be two layers, senior and mezzanine, into one tranche from one lender at one blended margin. It removed a real friction. The older structure meant a bank holding the senior piece and a separate fund holding the junior, the two bound by an intercreditor agreement that took time and lawyers to settle. Unitranche collapses that into a single counterparty and a single set of terms, which is why a sponsor on a competitive auction timetable reaches for it first.
On Deloitte’s Alternative Lender Deal Tracker, the UK unitranche share of structures climbed steadily across 2020 and 2021. It is not a marginal preference; it is the prevailing shape of the lower-mid-market deal.
Unitranche reached roughly seven in ten UK alternative-lender structures by late 2021.
| Edition | UK unitranche share (%) |
|---|---|
| Spring 2020 | 58% |
| Autumn 2020 | 64% |
| Spring 2021 | 63% |
| Autumn 2021 | 70% |
- UK unitranche share of structures
Structure mix of European alternative-lender deals, as reported in each ALDT edition. UK unitranche, Rest-of-Europe unitranche and UK subordinated/mezzanine shares are taken verbatim from the structure section of each edition; the x-axis is the edition's approximate publish date. The tracker is a survey of participating lenders (57 in Spring 2020 rising through the period), not a census. Only editions public by the February 2022 post date are shown; the Spring 2022 edition had not yet published.
≈70%
Share of UK alternative-lender deal structures done as unitranche by the Autumn 2021 Deloitte tracker, up from 58% in early 2020. Subordinated/mezzanine structures fell to about 12% over the same window.
Source · Deloitte Alternative Lender Deal Tracker, Autumn 2021 (UK structure mix)
What does the single tranche actually cost?
The price of a unitranche is a blended margin: it sits above where a pure senior facility would price, because the lender is also funding the riskier junior portion, and below where standalone mezzanine would. For a borrower whose business genuinely needs the leverage a junior layer provides, that blend is fair value: you are buying real capital, simply and quickly. The question is what you are buying when the business does not need that much leverage.
Senior-plus-mezzanine can carry a lower weighted-average cost in exactly the case a lower-mid-market company often presents: a clean, cash-generative credit where a bank or specialist will fund the bulk of the structure on senior terms at a keen margin, and only a thin top slice needs more expensive money. Split the capital and the cheap tranche stays cheap. Blend it into a unitranche and the whole facility is repriced upward to carry a junior risk that, in proportion, is small. The premium is the cost of not splitting.
Unitranche buys you one lender and one document. Below £15m, make sure that convenience is something you need — not a premium on leverage you will never use.
Why is this a more British habit than a European one?
The single-tranche structure is markedly more entrenched in the UK than across the rest of Europe, and through 2021 the gap was widening rather than closing. The UK direct-lending market matured earlier, the large funds built their unitranche products here first, and the UK mid-market is more sponsor-led; sponsors prize the speed and execution certainty that one lender delivers. The structure followed the deal style.
The single-tranche habit is more British than European, and the gap was widening.
| Edition | UK (%) | Rest of Europe (%) |
|---|---|---|
| Spring 2020 | 58% | 50% |
| Autumn 2020 | 64% | 50% |
| Spring 2021 | 63% | 50% |
| Autumn 2021 | 70% | 56% |
- United Kingdom
- Rest of Europe
Structure mix of European alternative-lender deals, as reported in each ALDT edition. UK unitranche, Rest-of-Europe unitranche and UK subordinated/mezzanine shares are taken verbatim from the structure section of each edition; the x-axis is the edition's approximate publish date. The tracker is a survey of participating lenders (57 in Spring 2020 rising through the period), not a census. Only editions public by the February 2022 post date are shown; the Spring 2022 edition had not yet published.
The tracker is a survey of participating alternative lenders, not a full census of the market, and the panel grows edition to edition. The direction is robust across editions: unitranche dominant in the UK and pulling further ahead of Europe.
How should a £3–15m borrower actually choose?
Start from the cash-flow profile, not the structure menu. If the business throws off steady, predictable cash and can service a conventional senior facility comfortably, a tighter senior loan from a bank or specialist is often the cheaper and cleaner answer, with a junior piece added only if the quantum genuinely requires it. If the deal is leverage-hungry, time-critical or sponsor-driven, where a single counterparty and a fast close are worth real money, unitranche earns its premium. The error is treating the question as already answered.
Unitranche is an excellent instrument that has become a reflex, and a reflex is not a structuring decision. The only way to know which structure your business should carry is to put both in front of the right lenders and price them against your actual cash flows. That is what a process is for. Below £15m, where every point of margin is felt, the difference between the fashionable structure and the fitted one is money that stays with the company.
Questions a CFO asks
Common questions
- Is unitranche cheaper than senior debt plus mezzanine?
- Usually not on the headline margin. A unitranche blends one rate across the whole facility, so it prices above where a senior tranche alone would, but below a separate mezzanine layer. Senior-plus-mezzanine can carry a lower weighted cost when the senior portion is large and cheap. The catch is two sets of terms, two lenders and an intercreditor agreement to negotiate. You are paying the unitranche premium for one counterparty and one set of documents, not for cheaper money.
- When does senior-plus-mezzanine still make sense below £15m?
- When the business is clean and cash-generative enough that a bank or specialist will fund most of the structure on senior terms, and only a thin top slice needs the more expensive money. Splitting the capital lets the cheap tranche stay cheap. It also makes sense where the borrower wants a modest, well-secured senior facility now and the flexibility to take a junior piece later, rather than committing to a single blended quantum on day one.
- Why is unitranche so much more common in the UK than the rest of Europe?
- Partly history: the UK direct-lending market matured earlier and the major funds built single-tranche products here first. Partly the borrower base: UK mid-market buyouts lean heavily on private-equity sponsors who value speed and certainty of execution, which is exactly what a one-lender unitranche delivers. The structure followed the deal style, and the deal style is more sponsor-led in the UK than across much of the Continent.