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Markets·4 April 2026·5 min read

Rate caps, margins and reference rates — understand the pricing

A floating-rate corporate loan is priced as a reference rate (STIBOR or equivalent) plus a margin. Understanding the two components — and protection instruments such as rate caps — is fundamental to good debt management.

Rate caps, margins and reference rates — understand the pricing

Reference rate and margin

The reference rate follows central-bank policy and the interbank market. The margin is the bank's compensation for credit risk, capital consumption and relationship profitability — it is company-specific and negotiable.

The margin can be adjusted over the life of the loan through a margin ratchet linked to the company's ratios.

Caps, floors and swaps

A cap limits how high the reference rate can pass through to the company. It is bought against a one-off premium and works as insurance. An interest-rate swap exchanges floating for fixed over a period and is used when the company wants predictable interest costs.

What suits whom?

Companies with sensitive cash flow should consider a cap or swap on at least part of the debt. Companies with strong interest cover can absorb more rate variability. The decision is quantitative — not ideological.

Summary
  • The margin is negotiable; the reference rate is not.
  • A cap provides a ceiling against a one-off premium.
  • A swap exchanges floating for fixed — useful for cash-flow planning.
  • Rate hedging is a quantitative decision, not an ideological one.
Next step

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