How does graded vesting affect the pattern of share-based compensation expense recognition?

Graded vesting creates an accelerated expense recognition pattern under one method. Here is the comparison.

Method 1: Treat as Separate Awards (IFRS Requirement)

Each tranche is treated as a separate award with its own vesting period and fair value.

Assume the fair values are (different because of different expected lives):

• Tranche 1 (vests Year 1): $12/option → $1,200 total
• Tranche 2 (vests Year 2): $14/option → $1,400 total
• Tranche 3 (vests Year 3): $16/option → $1,600 total
• Total fair value: $4,200

Notice the front-loaded pattern: Year 1 expense is nearly 5x Year 3.

Method 2: Straight-Line Over Longest Vesting Period (US GAAP Option)

US GAAP allows treating the entire grant as a single award and spreading the total fair value evenly over the longest vesting period (3 years).

Using $4,500 total (single fair value):

However, US GAAP requires that at minimum, the expense recognized in each period must be at least the amount that would have vested by that date. This means the straight-line method has a floor.

Comparison:

The separate awards method front-loads compensation expense, which depresses early-year earnings more than the straight-line method.

Analyst Implications:

• When comparing a US GAAP company (straight-line) to an IFRS company (separate awards), the IFRS company will show higher compensation expense in early years and lower in later years
• The total expense over the full vesting period is the same under both methods (ignoring fair value differences per tranche)
• Watch for companies switching methods as an earnings management tactic

Exam tip: If the question says IFRS, you MUST use the separate awards (accelerated) method. If it says US GAAP and doesn't specify, check the context.

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