LBO Debt Capacity Calculator

Understanding LBO Capital Structures & Debt Capacity

In M&A buyouts, private equity firms (sponsors) focus heavily on Debt Capacity. Debt capacity is the maximum amount of debt a company can safely secure based on its cash flow profile. Because senior debt carries lower interest rates but stricter covenants, sponsors balance capital stacks with subordinated mezzanine tranches.

Buyout debt capacity is typically quoted as a multiple of EBITDA:

In the lower-middle market, debt capacity typically ranges from 3.0x to 4.5x EBITDA for businesses with stable, recurring revenue. Higher leverage (4.5x–6.0x) is available for premium assets with strong cash conversion, predictable ARR, or hard asset collateral.

Senior Debt vs. Mezzanine: The Capital Stack Hierarchy

LBO capital structures are layered by risk and return priority:

• Senior Secured Debt (First-Lien): The cheapest form of financing, backed by collateral (assets, AR, IP). Typically priced at SOFR + 300–500 bps with strict DSCR covenants. Senior lenders have first claim on assets in default.
• Mezzanine / Subordinated Debt: Unsecured or second-lien debt sitting below senior debt in the repayment waterfall. Carries higher coupons (12–18%) or PIK (payment-in-kind) interest. Often includes warrants or equity kickers to compensate for elevated risk.
• Sponsor Equity: The residual tranche funded by the PE sponsor. Absorbs first losses but captures the highest upside through leverage amplification over the hold period.

Drivers of Sponsor IRR Returns

An LBO model amplifies sponsor equity yields through three core levers:

• Deleveraging (Debt Paydown): The company uses operational cash flows to repay senior debt principal, transferring asset ownership from lenders to equity holders.
• Operational EBITDA Growth: Increasing margins or top-line ARR expands the company value over the investment timeline.
• Multiple Expansion: Selling the business at a higher multiple than the entry multiple, usually driven by scale or improved operational efficiencies.

LBO Entry Metrics: What PE Sponsors Prioritize

When private equity firms evaluate LBO targets, they screen for a consistent set of financial and operational characteristics:

• EBITDA Margins > 20%: Sufficient free cash flow generation to service debt covenants without operational distress.
• Stable or Growing Revenue: Predictable top-line reduces refinancing risk and supports lender underwriting confidence.
• Defensible Market Position: Niche dominance, switching costs, or IP moats reduce risk of competitive compression during the hold period.
• Low Existing Leverage: A clean balance sheet maximizes the debt financing available to the sponsor for deal structuring.