An accrual bond capitalizes or accretes interest instead of paying all interest currently; structures include zero-coupon, capital-appreciation, and accrual tranches.
An accrual bond is a debt security that accumulates some or all interest instead of paying that interest currently in cash. The accrued amount may increase the bond’s carrying or redemption value, be paid at maturity, or remain deferred until another structural condition is met. The term describes a payment pattern, not one universal bond contract.
For a simple zero-coupon structure with periodic compounding:
Equivalently, the accreted value after (t) periods is:
Where (P_0) is initial value, (M) is maturity value, (r) is the periodic yield, and (n) is periods to maturity. Real instruments can use semiannual compounding, irregular periods, contingent payments, or legal accretion schedules.
Assume a five-year zero-coupon bond pays 1,000 at maturity and is valued at a 6% annual yield.
1Initial value = 1,000 / 1.06^5 = 747.26
2Year-one accretion = 747.26 x 6% = 44.84
3End-of-year-one accreted value = 792.10
No coupon cash is received in year one, but the bond’s model carrying value increases under the constant-yield assumption. Market value can still be above or below 792.10 if required yield, credit, liquidity, or other inputs change.
| Structure | Current cash interest | How value accumulates |
|---|---|---|
| Zero-Coupon Bond | None | Issued or traded below maturity value; discount accretes over time |
| Capital appreciation bond | Usually none during the accrual phase | Stated accreted value grows to a scheduled maturity amount |
| Payment-in-kind bond | Interest may be paid in more debt rather than cash | Principal or security count increases under the terms |
| Deferred-interest bond | No or reduced cash interest for an initial period | Deferred amount capitalizes or becomes payable later |
| CMO Z-Bond | Generally deferred while prior tranches receive cash | Interest accrues to tranche balance until its payment window begins |
These structures differ materially in legal claim, cash-flow uncertainty, credit exposure, and tax treatment.
Accrual bond describes a security whose terms defer or capitalize interest. Accrued interest on a conventional coupon bond is the portion of the next coupon earned between payment dates.
A coupon bond can have accrued interest at settlement without being an accrual bond. Conversely, an accrual bond may have no conventional coupon accrued-interest settlement because it pays no current coupon.
An accrual bond’s value depends on the present value of later cash flows. For a default-free zero-coupon bond, maturity value and discount rate are the main inputs. For a corporate or structured accrual bond, analysts must also consider:
Accretion is not the same as realized return. Selling before maturity exposes the holder to the market yield at sale, and default can prevent payment of the accreted amount.
In the United States, the IRS generally treats original issue discount as a form of interest and provides rules for including OID as it accrues. Zero-coupon bonds are common OID instruments. However, tax treatment differs for tax-exempt obligations, market discount, acquisition premium, stripped securities, account type, and holder circumstances.
The absence of a cash coupon does not establish that no current tax reporting is required. Use the current instrument data and professional or official tax guidance rather than applying a generic rule.
Investor.gov’s zero-coupon bond guide explains discount issuance, maturity payment, price sensitivity, and possible tax on imputed interest. TreasuryDirect’s STRIPS guide shows how principal and coupon components become separate zero-coupon securities. IRS Publication 1212 provides current U.S. guidance on original issue discount instruments.
This page is educational only. Contractual, accounting, and tax treatment depends on the instrument, reporting framework, jurisdiction, and holder circumstances.