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How to finance a leveraged buyout (LBO): The capital stack walkthrough
How to finance a leveraged buyout (LBO) is the question every middle-market acquirer eventually asks when the target’s purchase price runs past what conventional senior debt alone will fund.
I have been operating in the small business finance world long enough to tell you that real LBO financing is more about disciplined capital stacking than about exotic structures.
The buyer who understands the four-to-five-layer stack and can match each layer to the right capital source closes clean deals. The buyer who fixates on one source ends up either over-paying for capital or unable to fund the deal at all.
This piece walks the standard LBO capital stack, how each layer prices, and the practical sequencing that gets a deal funded.
What a leveraged buyout actually is
Plain and simple, a leveraged buyout is an acquisition financed primarily through borrowed money rather than the buyer’s equity. The acquired company’s own cash flow and assets typically secure the debt, which is why the structure works on profitable, asset-rich targets and struggles on early-stage or asset-light businesses. The buyer puts up a meaningful but minority equity slice (typically 20 to 40 percent of the purchase price), and the rest of the deal funds through layered debt.
From my experience, LBO buyers in the small to lower-middle-market space fall into three camps. Private equity sponsors funding platform acquisitions. Independent operators using sponsor-style structures on a single deal. Strategic acquirers in the same industry as the target who want to finance a larger acquisition than their balance sheet alone would support.
The standard LBO capital stack
The standard small-to-mid LBO stack runs four or five layers, working from senior to junior in liquidation priority.
- Senior secured debt. Bank-funded term loan or asset-based facility. Typically 50 to 65 percent of the purchase price. Lowest cost, highest priority in liquidation.
- Subordinated or mezzanine debt. Specialty lender or private debt fund. Typically 10 to 25 percent of the purchase price. Higher cost (10 to 14 percent), often with a small equity kicker.
- Seller-carried note. The selling owner finances a portion. Typically 5 to 15 percent of the purchase price. Cost varies.
- Sponsor or operator equity. The buyer’s own equity contribution. Typically 15 to 25 percent of the purchase price.
- Management rollover (optional). The selling owner or key managers retain equity in the new entity. Typically 0 to 10 percent.
The exact mix shifts deal by deal based on the target’s cash flow profile, asset base, and growth thesis. Asset-heavy industrial targets carry more senior debt. Service businesses with limited collateral lean harder on mezzanine and equity.
The senior debt layer
Senior debt is the cheapest piece of the stack and the first place every LBO buyer should look. The two main forms are a senior term loan (typically 5 to 7 year amortization, fixed or variable rate) and an asset-based revolving facility against receivables and inventory. Most small-to-mid LBOs combine both into a single senior package.
From my experience, senior debt comes from three lender categories in the small-cap LBO market. Regional and community banks for deals under $25 million. Specialty acquisition lenders for the $10 to $100 million range. SBA 7(a) loans up to $5 million for the smallest deals, where the SBA path delivers cheaper capital than conventional senior debt would.
The mezzanine debt layer
Mezzanine debt fills the gap between what senior lenders will provide and what the equity sponsor wants to contribute. The instrument is typically a subordinated note priced at 10 to 14 percent, sometimes with a small equity warrant or kicker. Mezzanine lenders include specialty private debt funds, BDCs, and family offices that have moved into the asset class.
Mezzanine works best when the target has steady cash flow that can service the higher interest cost without straining operations. Deals with volatile cash flow typically cannot support the mezzanine layer and have to find more senior debt or more equity instead.
The seller-carry layer
Many LBOs include a seller-carried note that allows the seller to roll part of the proceeds into a payment stream over time. The structure offers tax benefits to the seller (installment treatment) and reduces the buyer’s cash need at close. The note typically sits behind senior and mezzanine debt in liquidation priority.
That being said, seller carries in LBO structures look different from the SBA-compliant seller notes used in smaller acquisitions. The LBO seller note is not bound by the 24-month standby and subordination rules that govern SBA-compliant seller financing. The note’s commercial terms are entirely negotiated between buyer and seller.
Side-by-side: LBO capital layers
| Layer | Typical Cost | Share of Purchase Price | Position in Liquidation |
|---|---|---|---|
| Senior secured debt | Prime + 1.5 to 4 percent | 50 to 65 percent | First |
| Mezzanine / subordinated debt | 10 to 14 percent + warrant | 10 to 25 percent | Second |
| Seller-carried note | 6 to 10 percent | 5 to 15 percent | Third |
| Sponsor / operator equity | 20 to 25 percent target IRR | 15 to 25 percent | Last (residual) |
| Management rollover | Aligned with sponsor equity | 0 to 10 percent | Last (residual) |
Sizing the senior debt piece
Senior lenders typically size their commitment off the target’s EBITDA. The standard formula caps senior debt at 3 to 4 times trailing-twelve-month EBITDA on a profitable target, with the multiple adjusting up or down based on industry, asset coverage, and the borrower’s credit profile.
From my experience, three target attributes drive senior sizing more than any others. The proportion of recurring versus one-time revenue. The hard-asset coverage on inventory, equipment, and receivables. The historical EBITDA stability across the last 3 to 5 years. Targets that score well on all three can support senior debt up to 4x EBITDA. Targets that score weakly on any one of them get capped closer to 2.5x.
The equity sizing math
Once the senior and mezzanine layers are sized, the equity piece is the remainder needed to close the deal. The sponsor calculates the equity check based on the gap between total capital needed (purchase price plus closing costs plus working capital) and total debt committed.
For a $25 million LBO with $5 million of EBITDA, the math might look like this. Senior debt at 3.5x EBITDA equals $17.5 million. Mezzanine at 1x EBITDA equals $5 million. Total debt $22.5 million. Equity needed to close $2.5 million plus 5 percent of working capital reserves. Total equity check roughly $3 million.
How to pick the right senior lender
Three senior lender categories show up most often. Each has different appetite, pricing, and execution speed.
Community and regional banks offer the cheapest pricing but limit deal size and prefer in-market borrowers. Specialty acquisition lenders price 50 to 150 basis points higher but execute faster and are willing to look at deals outside the bank’s geography.
SBA-backed structures fit acquisitions under $5 million and bring the SBA guarantee programs covered in the types of sba loans pillar piece. The SBA 7(a) vs 504 in acquisitions piece walks the program comparison for LBO-style acquisitions that fit inside the SBA ceiling.
Working with mezzanine lenders
Mezzanine lenders typically look at a slightly different set of metrics than senior lenders. Senior lenders focus on collateral and cash flow coverage. Mezzanine lenders focus on enterprise value, growth potential, and the sponsor’s track record. The two underwriting frameworks complement each other, but the mezzanine piece often gets approved on different timing than the senior piece.
From my experience, mezzanine lenders make decisions in 30 to 60 days from term sheet to close on smaller deals. Senior lenders typically take 60 to 90 days. The sponsor should run both processes in parallel from the start in order to keep the deal on a consistent closing timeline.
Where the seller-carry fits
Including a seller-carried note in an LBO stack does two things for the buyer. First, it reduces the equity needed to close. Second, it signals to senior and mezzanine lenders that the seller has continued confidence in the business. Sellers who agree to carry meaningful paper post-close are vouching for the underlying business in a way that improves the lender’s risk perception.
That being said, the seller-carry layer has limits. Sellers in larger LBO deals usually want most of their proceeds in cash at close, and a buyer who pushes too hard for a large seller carry can lose the deal to a competing bidder offering more cash. The seller-carry typically maxes out at 10 to 15 percent of the purchase price in a competitive auction process.
Common mistakes in LBO financing
Five mistakes show up most often in LBO deals that fail to close or close on bad terms.
The first is over-leveraging the senior debt piece. Pushing senior to 4.5x or 5x EBITDA on a target that can only realistically support 3.5x sets up covenant breaches in the first 12 months. The second is under-sizing the working capital reserve. Buyers who calculate just enough capital to fund the purchase price find themselves short on operating cash in month 3.
The third is mismatching senior and mezzanine timing. The senior term sheet and mezzanine term sheet need to align on key terms in order to keep the deal moving, especially the inter-creditor agreement that governs who gets paid first in a workout. The fourth is failing to negotiate the seller carry early. Sellers in competitive processes have less appetite to carry paper late in the deal.
The fifth is ignoring the equity sponsor’s existing portfolio. Sponsors with capacity issues at the fund level sometimes lose deals because they cannot write the full equity check in the required window.
How to take the next step
If you are evaluating an LBO this year, the right sequence is straightforward. Pull the target’s trailing 24 months of financials and compute the senior debt capacity. Identify two to three senior lenders that fit the deal size and industry. Engage one or two mezzanine lenders in parallel. Have an early conversation with the seller about seller-carry willingness. Build the full capital stack on a single sheet of paper before submitting any binding LOI.
From there, the work compounds. Buyers who walk into LBO negotiations with a fully built stack close the deal. Buyers who hope the lenders will figure out the structure spend 12 months chasing the deal and lose it to a more prepared competitor. Good luck and keep at it.