How do I estimate sustainable debt capacity for a corporate issuer?

Question

AcadiFi · Accepted Answer

Debt capacity is the maximum leverage compatible with a target rating, sustainable through industry cycles and typical stress scenarios.

TWO APPROACHES:

Approach 1: Top-down rating-based
Use agency median ratios for target rating and solve for max debt.

Example target BBB (S&P median):
- Debt/EBITDA ≤ 2.5x
- FFO/Debt ≥ 22%
- EBITDA/Interest ≥ 7x

For Brookmere Foods with EBITDA $420M, FFO $355M:
- Max Debt (from Debt/EBITDA) = 2.5 × $420M = $1,050M
- Max Debt (from FFO/Debt) = $355M / 0.22 = $1,614M
- Max Debt (from Interest coverage at 5% cost of debt) = $420M / (7 × 0.05) = $1,200M
- Binding constraint: the tightest → $1,050M

Approach 2: Bottom-up cash flow
Start with sustainable FCF and back out debt service capacity.

For Brookmere:
- Sustainable FCF (post maint capex, pre financing): $215M
- Target FCF/Debt at BBB: ~15%
- Max debt = $215M / 0.15 = $1,433M

COMBINE WITH STRESS TESTING:
- Stress EBITDA down 20% → $336M
- Max stressed debt at BB trigger (Debt/EBITDA 4x) = 4 × $336M = $1,344M
- If current debt exceeds $1,344M, firm risks downgrade in stress

DEBT CAPACITY CURVE:
- Plot target rating (Aaa→C) against max debt
- Slope steepens as leverage rises; marginal debt tolerated shrinks near HY threshold
- Useful for capital structure decisions

PRACTICAL CONSIDERATIONS:

1. Lease-adjusted leverage
Capitalize operating leases at 6-8x rent. Adds to effective debt.

2. Pension and OPEB
Underfunded pension treated as debt-like obligation. S&P includes in adjusted debt.

3. Contingent liabilities
Guarantees, lawsuits, environmental reserves.

4. Off-balance-sheet debt
Unconsolidated JVs, securitizations.

5. Industry benchmarks
Telecom utilities tolerate higher leverage (stable cash flow) than consumer discretionary (cyclical).

WORKED EXAMPLE — Sycamore Beverage Inc
- EBITDA: $680M
- Current debt: $1.9B (2.8x leverage)
- Operating leases PV: $320M
- Pension underfunding: $180M
- Adjusted debt: $2.4B (3.5x adjusted leverage)
- Target rating: BBB
- S&P BBB threshold (food sector): adjusted Debt/EBITDA ≤ 3.5x

At current adjusted leverage 3.5x, Sycamore is at the BBB limit. No room for additional debt-financed M&A without downgrade risk. Share buybacks funded from cash flow may keep rating stable; funded from debt would pressure rating.

COMMUNICATION:
Share debt capacity analysis with treasury/corporate development to inform M&A capacity, buyback authorizations, and refinancing strategy.

How do I estimate sustainable debt capacity for a corporate issuer?

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