What Is Original Issue Discount (OID)?
When a company issues a bond or loan for less than the amount it must repay, the difference is original issue discount. A bond with a $1,000 face value sold at $970 carries $30 of OID, usually quoted as an issue price of 97. The discount compensates investors beyond the stated coupon, pushing the instrument's true yield above the coupon rate. Zero-coupon bonds are the extreme case, where the entire return comes from OID rather than periodic interest payments.
OID arises for practical reasons. Issuers and underwriters may price a new deal at a discount to attract demand when market conditions soften between launch and pricing, a move known as flexing the terms. Keeping the coupon at a round number while adjusting the issue price also lets arrangers fine-tune yield in small increments. Whatever the motivation, the discount accretes over the life of the instrument, with the holder's basis climbing steadily toward par.
How OID Works and Is Taxed
US tax law treats accrued OID as interest income even though the investor receives nothing in cash until maturity. Holders must recognize the accretion each year under the constant-yield method, creating what practitioners call phantom income—taxable earnings without accompanying cash flow. The issuer gets the mirror image, deducting the accrued discount as interest expense over the instrument's life rather than all at once when the debt is finally repaid.
A de minimis rule keeps trivial discounts out of the regime: if OID is less than 0.25% of the redemption price multiplied by the number of complete years to maturity, it is treated as zero for accrual purposes. Deeply discounted high-yield instruments can also trip the AHYDO rules—applicable high yield discount obligation provisions—which defer or permanently disallow a portion of the issuer's interest deductions on long-dated debt carrying significant OID and yields well above federal benchmark rates.
Why OID Matters in Leveraged Finance
OID is everyday vocabulary in the leveraged loan market. New institutional term loans are commonly issued at 98.0 to 99.5, and analysts quote the discount in points—two points of OID on a $1 billion loan means the borrower receives $980 million but repays the full billion. Because the discount is earned over the loan's life, a shorter expected hold period makes OID a meaningfully larger component of a lender's annualized return.
For borrowers and sponsors, OID is a real cost of capital that models must capture: the debt schedule carries the full face amount while cash proceeds are lower, and the accretion runs through interest expense. During volatile markets the discount can widen dramatically—some hung LBO loans in 2022 cleared in the low 90s, shifting economics between arranging banks and end investors. Interviewers in leveraged finance expect candidates to explain how OID changes an instrument's effective yield.
