Share-Based Payment Accounting

Before the adoption of SFAS 123R (now codified as ASC 718), US GAAP allowed companies to use the intrinsic value method under APB 25, which produced zero expense for at-the-money options. The shift to fair-value-based accounting under ASC 718 in 2006 dramatically increased reported operating expenses for companies with large equity compensation programs and fundamentally changed how stock-based compensation (SBC) is analyzed.

Under ASC 718, the fair value of each award is determined at the grant date. For stock options, this requires a valuation model — the Black-Scholes-Merton model for most standard options, or a lattice model (binomial model) for complex awards. The key inputs are: current stock price, option strike price, expected term, expected volatility (typically derived from historical stock price volatility or implied volatility), risk-free rate, and expected dividend yield.

Once the grant date fair value is established, it is recognized as compensation expense over the requisite service period (typically the vesting period), charged to the appropriate expense line (COGS, R&D, or SG&A) based on the function of the employee receiving the award. The credit entry creates additional paid-in capital on the balance sheet.

RSUs are valued at the grant date stock price (since no exercise price is involved) and expensed ratably over the vesting period. Performance share units (PSUs) require assessment of the probability of achieving performance conditions under the grant-date fair value framework.

SBC is a non-cash charge and is one of the most debated adjustments in equity analysis. Technology companies in particular report significant SBC relative to revenue, and many present non-GAAP metrics that add back SBC. Critics argue this masks real economic dilution costs; defenders note the non-cash nature of the charge makes GAAP earnings less comparable to cash flow. The SEC has intensified scrutiny of non-GAAP presentations that exclude SBC.