Bond Accrued Interest When Buying Between Coupon Dates

When a bond is purchased between coupon dates, the buyer’s settlement price may include interest that accrued before the purchase. The buyer later receives the full coupon, but the pre-purchase portion is generally a return of the buyer’s capital rather than the buyer’s interest income. The buyer reduces bond basis by that amount and reconciles any Form 1099-INT that reports the full coupon.

Why a buyer pays accrued interest

Most coupon bonds pay interest only on scheduled dates, even though interest economically accrues each day. If a buyer purchases a bond between coupon dates, the seller has earned interest since the last payment date. The buyer typically pays the seller that accrued amount as part of the settlement price. When the next coupon is paid, the buyer receives the entire scheduled payment, including the part economically earned by the seller.

This settlement convention keeps the seller compensated for holding the bond during the accrual period. The buyer should separate the clean price of the bond from accrued interest shown on the trade confirmation. If the bond is tax-exempt, the accrued interest remains tied to the bond’s tax status, but the buyer’s basis adjustment still matters.

Tax treatment of the next coupon

IRS Publication 550 explains that when a cash-method investor buys a bond between interest dates, the portion of the purchase price representing accrued interest before the purchase is treated as a return of capital when received, not as interest income to the buyer. The buyer reduces the bond’s basis by that amount. The interest that accrues after purchase is the buyer’s taxable interest when paid, subject to the bond’s tax treatment.

The issuer or broker may report the full coupon on Form 1099-INT to the buyer because the buyer received the payment. The buyer may need to adjust the amount reported on Schedule B to avoid including the seller’s accrued portion as the buyer’s income. Keep the trade confirmation showing accrued interest paid and reconcile it with the information return. Do not ignore the Form 1099-INT; report the adjustment according to the current IRS instructions.

Simple example

Assume an investor buys a bond between coupon dates and pays $450 of accrued interest to the seller at settlement. At the next payment date, the investor receives a $900 coupon. The buyer generally reports $450 as interest income attributable to the period after purchase and treats the other $450 as return of capital, reducing the bond’s basis by that amount.

The seller generally reports the accrued interest portion as interest income for the year of sale. The purchase price paid by the buyer and the seller’s tax reporting should match the settlement record. The exact amount depends on the bond’s day-count convention, payment schedule, settlement date, and the accrued interest shown by the broker.

Reconcile the tax forms and basis

The buyer should keep the trade confirmation, bond statement, coupon notice, and Form 1099-INT. If the broker reports the entire coupon, the buyer reports the gross amount and the appropriate adjustment on Schedule B under current instructions, with a clear description such as accrued interest purchased. The basis reduction prevents the accrued amount from being taxed twice when the bond is later sold or redeemed.

For tax-exempt municipal bonds, the coupon may be excluded from federal gross income, but purchase-date accrued interest can still affect basis and reporting. Private activity bond interest may have AMT consequences. Discount bonds and original issue discount involve separate accrual rules; do not use the simple coupon-bond adjustment for every fixed-income instrument.

Accrued interest differs from market discount and OID

Accrued coupon interest is the part of a regular payment earned before the buyer owned the bond. Market discount is a discount relative to a bond’s adjusted issue price or redemption amount and can be taxable under different rules when the bond is sold or redeemed. Original issue discount accrues under tax rules even if cash is not paid until maturity. A broker’s accrued-interest line does not calculate either market discount or OID.

If a bond is purchased at a discount, determine whether the discount is original issue discount, market discount, or simply a price discount caused by interest rates. Elections such as electing to include market discount currently can change the result. The tax lot records should include purchase price excluding accrued interest, purchase date, bond terms, and any elections made.

Special situations and errors

If the bond is in default and accrued interest has not been paid, the trade may be described as trading flat. The IRS treats later payment of pre-purchase defaulted interest differently; it may be a return of capital that reduces basis rather than taxable interest to the buyer. Interest accruing after purchase is generally taxable to the buyer when received or accrued under the taxpayer’s accounting method.

Common errors include reporting the full coupon without adjustment, treating accrued interest as a discount, forgetting basis reduction, or confusing coupon interest with OID. For an exam problem, identify trade date and settlement, calculate the accrued amount, separate the seller’s and buyer’s periods, then report the next coupon and adjust basis accordingly.

Practical investment records

At purchase, save the order confirmation with clean price, accrued interest, commissions, and settlement date. At year-end, compare Forms 1099-INT and 1099-OID with the account activity. Track each bond by tax lot because buying the same issue at different prices and dates can create different basis, discount, and accrual treatment.

If the bond is sold between coupon dates, the seller may receive part of the sales price as accrued interest and report that part as interest income; the remaining amount is generally analyzed as sale proceeds for gain or loss. The buyer and seller therefore handle the same accrued period from opposite sides.

Additional planning detail

Accrued interest is generally excluded from the bond’s tax cost basis at acquisition and handled as a separate adjustment when the coupon is paid. The investor should use the actual settlement confirmation rather than estimate days by dividing the annual coupon. Municipal bond trades can show accrued tax-exempt interest, while taxable bonds show taxable interest; both require accurate records so the seller’s earned interest is not taxed again to the buyer.