Mezzanine Debt Financing: Subordinated Coupon Spreads, PIK Interest & Equity Warrant Coverage

## Mezzanine Capital Architecture in Leveraged Finance

Mezzanine debt bridges the risk-return gap between senior secured bank debt and equity capital. It is structured as senior subordinated notes or junior secured debt with equity participation.

### 1. The Tri-Component Return Model

A mezzanine fund's target internal rate of return (IRR) is composed of three contractual income streams:

1. **Cash Interest Coupon (10% to 12%)**: Paid monthly or quarterly from operating cash flow.
2. **Payment-in-Kind (PIK) Coupon (2% to 4%)**: Capitalized onto the loan principal and paid upon maturity or refinancing.
3. **Equity Co-Investment or Warrants (2% to 4% IRR Equivalent)**: Nominal warrants to purchase 1% to 5% of common equity upon exit.

$$\text{All-In Nominal Return} = \text{Cash Rate} + \text{PIK Rate} + \frac{\text{Exit Equity Value} \times \text{Warrant \%}}{\text{Investment Duration}}$$