The coupon is the stated interest rate a debt instrument pays, expressed as a percentage of its face (par) value. A $1,000 bond with a 6% coupon pays $60 a year regardless of what an investor paid for the bond — which is precisely why coupon and yield are different numbers, and why confusing them misprices credit.
Coupon mechanics
The name survives from physical bond certificates whose detachable coupons were clipped and redeemed for interest — the instrument digitized; the vocabulary didn’t. Modern coupons come in the varieties that define credit instruments: fixed (constant through maturity — the bond-market default), floating (a spread over a reference rate like SOFR, resetting periodically — the private-credit default, where “SOFR + 550” is the coupon), PIK (paid in additional principal rather than cash), step-ups and toggles, and zero-coupon — no periodic payments at all, with return delivered through discount pricing.
Coupon versus yield is the working distinction. The coupon is a contract term computed on par; yield is the return implied by the price actually paid. Buy the 6% coupon bond at 90 cents on the dollar and the current yield is 6.7% with additional return from the pull to par at maturity; buy at 110 and yield falls below coupon. Secondary credit markets — including the distressed end — trade entirely in this gap, and fund reporting reflects it: a portfolio’s weighted average coupon describes contractual income, while yield at cost or yield to maturity describes the economics of what was paid.
Alternatives-facing touchpoints: credit fund and BDC disclosures quote portfolio coupons and spreads in basis points; the cash/PIK split of a coupon determines what income is actually received versus accrued; and structured notes' “coupons” are often contingent — conditional payments that borrow the bond word for a derivative payoff, a vocabulary reuse worth flagging to clients comparing a contingent 10% to a contractual one.
FAQ
What is a coupon in simple terms?
The interest rate printed on the debt — what the borrower pays annually per $100 of face value, in cash or (for PIK) in additional IOUs.
What's the difference between coupon and yield?
Coupon is fixed by contract on face value; yield depends on the price you paid. Buying below par pushes yield above coupon; above par, below it.
Why are most private credit coupons floating?
Lenders price loans as a spread over short-term reference rates, so income rises and falls with policy rates — protecting lenders from rate risk and transferring it to borrowers.
Related terms
Par Value · Floating-Rate vs. Fixed-Rate · PIK (Payment-in-Kind) · Zero-Coupon Bond · Maturity
Educational content only; not investment, tax, or legal advice. Consult qualified professionals regarding your specific circumstances.
