An Employee Stock Purchase Plan (ESPP) is a company-sponsored benefit allowing employees to buy company stock at a discount — typically 15% below market price — through payroll deductions. Qualified plans under IRC Section 423 provide additional tax advantages when holding-period requirements are met.
ESPPs let employees accumulate payroll deductions over an offering period (typically 6 or 12 months) and use those funds to purchase company stock at a discounted price. The standard discount is 15% below the lower of the stock price at the beginning or end of the offering period — a 'lookback provision' that can produce even larger discounts in rising markets. ## Section 423 Qualified Plans Under IRC Section 423, qualified ESPPs receive preferential treatment if the plan meets specific requirements: offered to all employees on a non-discriminatory basis; no employee owning 5%+ of the company may participate; the discount cannot exceed 15%; and holding-period requirements apply for qualifying dispositions. Contribution limit: $25,000 per year per employee (measured by FMV at grant date). ## Tax Treatment At purchase: no tax event for qualified Section 423 plans — the discount is not immediately taxable. At sale: - Qualifying disposition (held > 1 year from purchase AND > 2 years from offering start): ordinary income on the lesser of (discount received) or (actual gain); excess gain is LTCG. - Disqualifying disposition (sold too early): spread at purchase (FMV at purchase − purchase price) is ordinary income on W-2; remaining gain is capital gain. ## Employer Considerations Companies offering ESPPs incur stock compensation expense under ASC 718 (FASB) for the fair value of the discount and lookback features. This is a real income statement charge — the 15% discount is not a 'free' benefit.
The 15% discount (often augmented by a lookback provision) provides an immediate mathematical return. For employees who sell immediately at purchase, the return is approximately 17.6% on deployed capital with low risk — the discount is 'free money.' The main risk is holding the shares and losing the gain through stock price decline. For diversification, most financial advisors suggest selling at purchase rather than holding concentrated single-stock exposure.
Under IRC Section 423, the maximum stock value purchasable in any calendar year is $25,000, measured by the stock's FMV on the offering date. This limits the scale of the benefit for high earners or high-priced stocks. Employer plan documents may impose lower limits.
ESPP proceeds show up as capital gains on Schedule D (qualifying dispositions) or as W-2 compensation (disqualifying dispositions). Mortgage and business loan underwriters typically treat ESPP income as variable/non-recurring — they may require 2 years of history and may not count it toward qualifying income without evidence of consistent participation and ongoing plan availability.