What does a declining interest burden ratio tell me and how do I benchmark it?

Question

AcadiFi · Accepted Answer

Interest burden = EBT / EBIT captures how much operating profit survives interest expense. A value of 1.0 means zero net interest drag (debt-free or interest income offsetting expense); lower values indicate heavier interest costs relative to operating profit.

For Saltmarsh falling from 0.91 to 0.76: in year 1, 9% of EBIT went to net interest; in year 3, 24% does. Either (a) interest expense grew — more debt or higher rates — or (b) EBIT shrank while debt stayed, amplifying the ratio mechanically.

Diagnostic steps:

1. **Absolute debt change**: Look at long-term debt / total debt on the balance sheet. A doubling of debt with similar rates doubles interest expense.

2. **Weighted average cost of debt**: Interest expense / average debt balance. If rising, the firm is rolling debt into higher-rate environments (post-2022 rate hikes stressed this for BBB issuers).

3. **Interest coverage (EBIT/Interest)**: Going from 11x to ~4x is a credit-quality deterioration. Covenants often trip at 3x-4x.

4. **Cyclical EBIT decline**: Industrials in a downturn see EBIT compress while fixed interest stays — interest burden falls without any debt change. Normalize to mid-cycle EBIT.

5. **Capitalized interest**: Big capex projects allow interest capitalization to PP&E — watch for changes in capex intensity distorting the ratio.

Benchmarks: mature non-financials typically run interest burden of 0.85-0.95. Highly levered firms (PE-backed, REITs, utilities) live in 0.60-0.80. Below 0.60 is a stress zone.

For Saltmarsh, 0.76 is workable but trending the wrong direction. Combined with rising leverage (DuPont financial leverage component), this is a credit story — refinancing risk if rates stay elevated. Model scenarios where interest expense steps up with each refinancing window.

What does a declining interest burden ratio tell me and how do I benchmark it?

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