FA-59002 / Payroll withholding rules / Member archive

Overtime regular rate with bonuses and differentials: shift differential in regular rate · case 02

Night-shift workers with overtime are underpaid on their premium.

Member previewVariant 2 · 3 implementations · 8 checks per implementation

Case contract

Input weekly {hours, rate, bonus, discretionary, diff_hours, diff}. Straight pay = hours*rate + diff_hours*diff. Regular rate = (straight pay + bonus unless discretionary) / hours. Overtime premium = regular rate * max(0, hours-40) / 2, rounded half-up to the cent. Total = straight pay + bonus + premium. Zero hours returns [0, bonus]. Return [premium, total].

Why this case matters

Nondiscretionary bonuses and shift differentials raise the regular rate, and only a half-time premium is owed on top of straight-time pay.

One recorded failure

Sample boundary fixture

This sample comes from the broken implementation of a controlled reproducer.

Boundary fixture	Actual	Expected	Outcome
regression 0	`[9444, 125022]`	`[9632, 125210]`	Failed

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