Introduction
Alphabet recorded $22.8 billion of stock-based compensation in 2024, an expense larger than many companies' entire revenue. None of it was paid in cash, so all of it was added back in operating cash flow. Yet the same year, Alphabet paid a net $12.2 billion in cash, mostly taxes for employees whose shares had vested, and $62.2 billion on buybacks that, among other things, offset the new shares. Stock compensation is a non-cash expense with very real cash consequences, and tracing it through the statements shows exactly where they appear.
It is also the transaction that most often catches people out, because it moves equity in two places and its tax effect arrives at a different time from the expense. The four-step method from tracing a transaction through the statements handles it cleanly, provided each stage of an award's life is traced separately: the expense while employees earn the award, the vesting when shares are delivered and the tax deduction arises, and the withholding of shares to cover employees' taxes.
The Expense: Net Income Down, No Cash Out
Under Accounting Standards Codification (ASC) 718, a company measures an award at its fair value on the grant date and recognizes that amount as an expense over the vesting period, usually alongside salaries in cost of revenue, research and development, and selling, general and administrative expenses. Because the company pays in its own shares rather than cash, the matching increase goes to additional paid-in capital, not to a liability.
- Stock-based compensation
Compensation paid to employees in the form of equity, such as restricted stock units or stock options, measured at fair value on the grant date and recognized as an expense over the period in which employees earn it. It reduces net income but uses no cash when expensed.
The tax treatment matters for the trace. In the United States, the company usually receives its tax deduction only when restricted stock units (RSUs) vest or options are exercised, not as the expense is recorded. In the meantime, it records a deferred tax asset for the future deduction, a balance explained in deferred tax assets and valuation allowances. Suppose a company records $100 of stock compensation in a year, with a 25% tax rate:
Net income falls by $75. The cash flow statement adds back the full $100, because no cash was paid, and removes the $25 deferred tax benefit, because that tax has not yet been saved in cash. Cash does not change. On the balance sheet, a $25 deferred tax asset appears; equity rises by $25 net, with paid-in capital up $100 and retained earnings down $75. The add-back mechanics shared with other non-cash charges are covered in non-cash items on the cash flow statement.
At Vesting: The Tax Deduction and Its Surprise
When the award vests, the company's tax deduction equals the value of the shares on the vesting date, not the grant-date value it expensed. If the share price has risen, the deduction exceeds the expense, and the extra tax saving is an excess tax benefit. Since Accounting Standards Update 2016-09, the Financial Accounting Standards Board's update on employee share-based payment accounting, excess benefits and shortfalls are recognized in income tax expense on the income statement rather than in equity.
Suppose the award expensed at $100 vests when the shares are worth $140. The tax deduction is $140, saving $35 in cash. The $25 deferred tax asset is used up, and the extra $10 is an excess tax benefit:
Cash rises by $35, the tax actually saved, and net income rises by $10. Over the award's whole life, net income has fallen by $65 ($75 less $10), and cash has risen by $35: the company paid nothing to its employees in cash and saved tax on the full value they received. Had the share price fallen to $80, the deduction would have saved only $20, and the $5 shortfall would have increased tax expense.
Alphabet shows the effect at scale. Its RSUs that vested in 2024 were worth $33.3 billion at vesting, against $22.8 billion of stock compensation expensed that year, and its 2024 annual report shows stock compensation reducing its effective tax rate by 1.5 percentage points. The full tax mechanics, including what happens to deferred tax assets when share prices fall sharply, are in tax effects of stock-based compensation.
Options Versus Restricted Stock Units
The vesting trace above describes restricted stock units, the most common award at large US companies. Stock options follow the same three-statement logic with a different trigger. A nonqualified option produces a tax deduction when it is exercised, equal to the spread between the share price and the exercise price at that date, so the excess benefit or shortfall is measured then. If an option expires unexercised because the share price stayed below the exercise price, there is no deduction at all, and the deferred tax asset built up during vesting is reversed through tax expense. Incentive stock options generally give the company no deduction unless the employee sells the shares early, so no deferred tax asset is recorded for them in the first place. In every case, the expense itself still reduces net income, is added back on the cash flow statement and increases paid-in capital exactly as in the first block.
Net Share Settlement: The Cash Cost in Financing
Employees owe income tax when their shares vest. Many companies settle this by withholding part of the shares and paying the employees' taxes in cash, a practice called net share settlement. The company delivers fewer shares, but it pays cash to tax authorities on the employees' behalf, and that cash is classified as a financing outflow, because it works like buying back the withheld shares.
- Net share settlement
A method of settling vested equity awards in which the company withholds enough of the employee's shares to cover the employee's tax liability and pays that tax in cash to the authorities. It reduces dilution but creates a financing cash outflow.
Continuing the example, if 40% of the $140 of vesting shares is withheld for taxes, the company pays $56 in cash and delivers $84 of shares. Cash falls by $56 in financing activities and paid-in capital falls by $56; the income statement is unaffected. Alphabet's 2024 cash flow statement shows $12.2 billion of net payments related to stock-based award activities in financing, and its equity statement shows a corresponding $12.5 billion reduction in paid-in capital for tax withholding on vested RSUs. How those flows sit alongside buybacks and dividends is covered in cash flow from financing activities.
What Bankers Take From the Trace
The trace explains a long-running debate. Because stock compensation is added back in operating cash flow and often excluded from adjusted EBITDA (earnings before interest, taxes, depreciation and amortization), companies that pay heavily in shares can look more profitable and more cash-generative than peers that pay in cash. Bankers deal with it in one of two consistent ways: treat it as a cash-like expense, by deducting it from EBITDA or free cash flow, or leave it added back and capture the cost through dilution in the share count. Doing neither counts the compensation as free. The choice is set out in free cash flow definitions, and the effect of unvested awards on the share count in earnings per share.
Three checks follow from the trace. Compare stock compensation with operating cash flow: at Alphabet it equaled about 18% in 2024. Read withholding payments as the part of the same awards settled in cash, not as a cost on top of the expense: they show how much of equity pay leaves the company as cash, below free cash flow. And compare buybacks with the change in diluted shares, since repurchases that only offset new grants return less to shareholders than they appear to. The accounting itself, including how awards are valued and expensed, is explained in stock-based compensation accounting.
