Graded vesting under ASC 718 vs IFRS 2: straight-line or accelerated expense

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An award with graded vesting releases its shares or options in slices, for example one third at the end of each of the next three years, instead of all at once on a single cliff date. Under US GAAP, ASC 718-10-35-8 lets an entity choose how to recognize compensation cost for a graded award that has only service conditions: either tranche by tranche, which front-loads the expense, or on a straight-line basis over the requisite service period for the entire award, provided the cumulative cost recognized at any date is at least the grant-date value of the portion already vested. IFRS 2 offers no such choice, because its implementation guidance at paragraph IG11 requires each instalment to be treated as a separate share option grant with its own vesting period.

The two methods differ in timing and agree on total cost. Over the life of an award that fully vests, both methods recognize the same grant-date value. The profile in between can differ sharply: in the three-year example below, a $36,000 award produces $22,000 of expense in year one under tranche-by-tranche attribution and $12,000 under the US GAAP straight-line election, a gap of $10,000 in the first year's operating profit for the same economic award.

That choice affects reported margins, the unrecognized compensation cost disclosed in the notes, the assumed proceeds used in diluted earnings per share, and any comparison between a US GAAP filer and an IFRS reporter with similar equity plans. The rest of the analysis sets out the two treatments, a comparison table, worked journal entries for equal and front-loaded vesting schedules, a forfeiture case, and the judgement areas that cause errors at year-end.

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GRADED VESTING AND CLIFF VESTING IN SHARE-BASED PAYMENT AWARDS.

The FASB Master Glossary describes the feature directly: an award may specify multiple vesting dates, referred to as graded vesting. A cliff-vesting award, by contrast, vests in full on one date, so its attribution question is simple and the grant-date value is spread over a single service period under both frameworks.

Graded schedules are common in employee stock option plans and restricted stock unit plans because they reward retention year by year. A typical schedule is 25% per year over four years, or one third per year over three years. Front-loaded schedules also exist, where a larger share vests at the first anniversary and the remainder in smaller instalments afterwards.

The question arises on the grant date, when the entity measures the award and sets up its expense schedule, and again at every reporting date, when it must check that cumulative expense keeps pace with vesting. It also arises whenever an employee leaves before all tranches vest, because the forfeited tranches carry different amounts of recognized cost depending on the attribution method. The basics of measuring equity-settled and cash-settled awards are covered in how share-based payment transactions are accounted for under IFRS 2 and ASC 718; the discussion here is limited to attribution over time.

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ASC 718-10-35-8: THE US GAAP POLICY ELECTION FOR GRADED VESTING.

ASC 718-10-35-8 requires an entity to make a policy decision about how it recognizes compensation cost for an employee award with only service conditions that has a graded vesting schedule. The two permitted approaches are recognition over the requisite service period for each separately vesting portion of the award, as if the award were in substance several awards, or recognition on a straight-line basis over the requisite service period for the entire award.

The straight-line option comes with a floor. The amount of compensation cost recognized at any date must at least equal the portion of the grant-date value of the award that is vested at that date. When the vesting schedule is even, the floor rarely binds. When the schedule is front-loaded, the floor can force additional expense into early periods, so the result sits between pure straight-line and pure tranche-by-tranche attribution.

The election is an accounting policy, applied consistently to similar awards and disclosed. It covers service-only awards. Graded awards whose vesting also depends on a performance condition are attributed tranche by tranche, each tranche over its own requisite service period, with expense recognized only when the performance condition is probable of being achieved.

A second election interacts with the first. Under ASC 718-10-35-3, an entity makes an entity-wide policy election for all employee awards either to estimate the number of awards for which the requisite service will not be rendered or to recognize the effect of forfeitures when they occur. The forfeiture policy changes how quickly reversals hit the income statement, and the attribution policy changes how much cost each forfeited tranche has accumulated.

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IFRS 2 PARAGRAPH IG11: EACH INSTALMENT AS A SEPARATE GRANT.

IFRS 2 contains no policy choice for graded vesting. Paragraph IG11 of the implementation guidance states that the entity should treat each instalment as a separate share option grant, because each instalment has a different vesting period, and hence the fair value of each instalment will differ. The IFRS Foundation's educational material explains the reason for the differing fair values: the length of the vesting period affects the likely timing of the cash flows from exercising the options.

The consequence is that IFRS reporters always use the accelerated, tranche-by-tranche profile for service-based graded awards. A three-tranche award is three grants: the first is expensed over one year, the second over two years, and the third over three years. In the first year, the entity therefore recognizes the whole first tranche, half of the second and one third of the third.

IFRS 2 also requires the entity to estimate the number of equity instruments expected to vest and to revise that estimate when subsequent information indicates a change, with a true-up so that cumulative expense reflects the instruments that eventually vest. There is no option to account for forfeitures only when they occur. The measurement basis for the tranches also differs in principle: under IG11 each tranche has its own fair value, whereas the worked example below holds the fair value per option constant across tranches to isolate the attribution effect.

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GRADED VESTING ATTRIBUTION: ASC 718 VS IFRS 2 COMPARISON.

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Point	US GAAP (ASC 718)	IFRS 2
Service-only graded awards	Policy choice: by tranche or straight-line	By tranche only (IG11)
Straight-line floor	Cost at least equals vested portion	Not applicable
Performance-condition tranches	By tranche, when probable	By tranche
Fair value per tranche	Grant-date fair value of the award	Each instalment valued separately
Forfeitures	Estimate or record as they occur	Estimate and true-up
First-year expense profile	Front-loaded or even	Front-loaded
Total cost if all vest	Grant-date value	Grant-date value

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The table shows why IFRS reporters with graded plans tend to report higher stock-based compensation expense in the early years of a grant than US GAAP reporters that choose straight-line. Across a stable program with new grants every year, the layering of overlapping grants narrows the annual difference over time, but the gap remains material for a newly launched plan, a large one-off retention grant, or a company whose grant volume is growing.

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WORKED EXAMPLE: EQUAL THREE-YEAR GRADED VESTING WITH JOURNAL ENTRIES.

An entity grants 3,000 share options to employees on January 1, 2026. One thousand options vest on December 31 of each of 2026, 2027 and 2028, subject only to continued employment. The grant-date fair value is $12.00 per option for every tranche, so the total grant-date value is $36,000. No forfeitures are expected or occur. All figures are illustrative.

Under tranche-by-tranche attribution, each tranche is worth $12,000. Tranche 1 is expensed over one year at $12,000 a year, tranche 2 over two years at $6,000 a year, and tranche 3 over three years at $4,000 a year.

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Year	Tranche 1	Tranche 2	Tranche 3	By tranche	Straight-line
2026	$12,000	$6,000	$4,000	$22,000	$12,000
2027	$0	$6,000	$4,000	$10,000	$12,000
2028	$0	$0	$4,000	$4,000	$12,000
Total	$12,000	$12,000	$12,000	$36,000	$36,000

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The straight-line amount is $36,000 divided by three years. The floor test passes at every year-end, because cumulative straight-line expense of $12,000 at the end of 2026 and $24,000 at the end of 2027 equals the grant-date value of the options vested by those dates. An IFRS reporter must use the by-tranche column; a US GAAP reporter may use either, according to its policy.

The journal entries for an equity-settled award credit equity. US GAAP filers typically credit additional paid-in capital; IFRS reporters credit an equity reserve, often labelled share-based payment reserve.

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Date and method	Account	Debit	Credit
Dec 31, 2026 by tranche	Compensation expense	$22,000
Dec 31, 2026 by tranche	APIC or share-based payment reserve		$22,000
Dec 31, 2027 by tranche	Compensation expense	$10,000
Dec 31, 2027 by tranche	APIC or share-based payment reserve		$10,000
Dec 31, 2028 by tranche	Compensation expense	$4,000
Dec 31, 2028 by tranche	APIC or share-based payment reserve		$4,000
Each year 2026-2028 straight-line	Compensation expense	$12,000
Each year 2026-2028 straight-line	APIC		$12,000

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Unrecognized compensation cost at the end of 2026 is $14,000 under the by-tranche method and $24,000 under straight-line. At the end of 2027 the figures are $4,000 and $12,000. Those balances feed the note disclosure of unrecognized cost and, for options, the assumed proceeds in the treasury stock method, so the attribution policy also changes diluted share counts. The mechanics of that calculation are covered in treasury stock method under ASC 260 and IAS 33.

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FRONT-LOADED VESTING: WHEN THE ASC 718 STRAIGHT-LINE FLOOR BINDS.

Keep the same 3,000 options at $12.00 each, but change the schedule so that 50% (1,500 options) vests at the end of 2026 and 25% (750 options) at the end of each of 2027 and 2028. The total grant-date value is still $36,000; the tranches are worth $18,000, $9,000 and $9,000.

By tranche, 2026 expense is $18,000 for tranche 1, $4,500 for tranche 2 and $3,000 for tranche 3, a total of $25,500. Pure straight-line would give $12,000 in 2026, but the options vested at the end of 2026 have a grant-date value of $18,000, so the floor requires cumulative expense of at least $18,000. At the end of 2027, straight-line cumulative expense would be $24,000 while the vested portion is worth $27,000, so the floor binds again.

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Year	By tranche	Straight-line with floor	Vested value (cumulative)
2026	$25,500	$18,000	$18,000
2027	$7,500	$9,000	$27,000
2028	$3,000	$9,000	$36,000
Total	$36,000	$36,000

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A US GAAP filer that elects straight-line and applies only the simple division would record $12,000 in 2026 and understate expense by $6,000 against the floor. The error is easy to make in a stock plan administration report that computes straight-line amortization without testing vested value at each period end.

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FORFEITURES IN A GRADED AWARD UNDER ASC 718 AND IFRS 2.

Return to the equal schedule under by-tranche attribution. Assume that during 2028, before the third tranche vests, employees holding 100 of the tranche 3 options leave. The first two tranches had already vested and are unaffected.

Each tranche 3 option was being expensed at $4.00 a year ($12.00 over three years), so the departing employees' 100 options had accumulated $800 of cost by the end of 2027. An entity recognizing forfeitures as they occur reverses that $800 in 2028 and records 2028 expense only on the remaining 900 options, $3,600. Net 2028 expense is $2,800 instead of $4,000, and total expense over the life of the award is $34,800, which equals the grant-date value of the 2,900 options that vested.

An IFRS reporter, or a US GAAP filer that estimates forfeitures, would have built an expected forfeiture rate into its schedule from the start and trued it up as actual departures became known. If the estimate had been zero, the 2028 true-up produces the same $34,800 total. The difference between the policies lies in which periods absorb the adjustment.

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Year	Expense, no forfeiture	Expense, 100 tranche 3 options forfeited in 2028
2026	$22,000	$22,000
2027	$10,000	$10,000
2028	$4,000	$2,800
Total	$36,000	$34,800

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The 2028 journal entry under the as-they-occur policy is a debit to compensation expense of $2,800 and a credit to APIC of $2,800, which nets the $3,600 current-year charge on the remaining options with the $800 reversal.

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PRESENTATION AND DISCLOSURE OF GRADED VESTING EXPENSE.

Stock-based compensation expense is presented within the operating expense lines that carry the related employees' salaries, such as cost of sales, research and development, or selling, general and administrative expense. The attribution method changes the amount reported in each line and leaves the classification unchanged. Where expense is shown by function, see how stock-based compensation expense is reported in the income statement.

US GAAP filers disclose their attribution policy for graded awards and their forfeiture policy with significant accounting policies, along with the total unrecognized compensation cost for nonvested awards and the weighted-average period over which it is expected to be recognized. Because the by-tranche method recognizes cost faster, it produces a smaller unrecognized balance and a shorter remaining period than straight-line for the same grants.

IFRS reporters disclose the expense recognized in the period for share-based payment transactions and information about how fair value was measured. When tranches are valued separately under IG11, the valuation inputs can differ by tranche, mainly the expected term, and the disclosure of inputs should reflect that.

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COMMON ERRORS IN GRADED VESTING ATTRIBUTION.

The most frequent error under US GAAP is applying straight-line without the vested-portion floor, which understates early expense on front-loaded schedules. A related error is extending the straight-line election to awards that also carry a performance condition, which are outside the election.

IFRS reporters sometimes copy a US parent's straight-line schedule into IFRS statutory accounts of a subsidiary. Because IG11 requires each instalment to be treated as a separate grant, a straight-line schedule produces an IFRS misstatement whenever vesting is graded, and the difference is largest in the first year of each grant.

Group reporting adds a judgement area. A US GAAP group that elects straight-line and has subsidiaries reporting under IFRS needs two expense schedules for the same awards, plus a reconciliation of the timing difference in equity. Plans with features beyond pure service vesting, such as market conditions, need their own measurement analysis before the attribution question is reached; awards with market conditions are discussed in how share-based payments with market conditions are valued under IFRS 2 and ASC 718.

Modifications of graded awards, for example accelerating one tranche on a change of control, have to be assessed tranche by tranche under IFRS, because each instalment is a separate grant. Under US GAAP, the analysis depends on whether the entity's policy treats the award as one unit or as several.

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GRADED VESTING CHECKLIST FOR YEAR-END.

Confirm which awards in the plan population have graded schedules and whether each has only service conditions or also performance or market conditions.

Document the US GAAP attribution policy for service-only graded awards and the entity-wide forfeiture policy, and check that the stock plan system applies both consistently.

For straight-line awards, test at each reporting date that cumulative expense is at least the grant-date value of the vested portion, and post a top-up entry where the floor binds.

For IFRS reporting entities, rebuild the schedule tranche by tranche, with a separate vesting period and, where measured, a separate fair value for each instalment.

Reconcile unrecognized compensation cost to the expense schedules and confirm that the same balances are used in the diluted EPS calculation and in the note disclosure.

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GRADED VESTING UNDER ASC 718 AND IFRS 2: WHERE THE TREATMENTS DIVERGE.

For service-only graded awards, the two frameworks reach the same total cost by different routes. IFRS 2 requires tranche-by-tranche attribution through paragraph IG11, which front-loads expense. ASC 718-10-35-8 lets a US GAAP filer choose the same method or a straight-line method across the entire award, subject to the rule that cumulative cost always covers the vested portion. In the equal three-year example, that choice moves $10,000 of a $36,000 award between year one and later years; in the front-loaded example the floor narrows the gap to $7,500 in year one.

The areas that require judgement are the fair value of each tranche under IFRS, the classification of an award as service-only before the US GAAP election is applied, the forfeiture policy and its interaction with attribution, and the treatment of modifications. A US GAAP filer that elects straight-line should be able to show its floor test at each period end, and an IFRS reporter should be able to show a tranche-level schedule that ties to the expense, the equity reserve and the unrecognized cost disclosed.

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