The Regular Rate of Pay: Why a Bonus Changes What You Already Paid

Written from our own experience running California businesses, for owners and operators rather than lawyers. This is our perspective on how these rules work in practice — not legal advice. See the note at the end.

Here is the scenario we find surprises owners most. An employee works forty-five hours in a week. Payroll runs correctly: forty hours straight time, five hours of overtime at the proper rate. Two weeks later you pay them a $200 safety bonus for that period.

You now owe overtime you have already paid.

Why a later payment changes an earlier week

Overtime is calculated on the regular rate of pay, and the regular rate includes essentially all remuneration for employment — not just the hourly wage. Nondiscretionary compensation is part of it. A bonus is nondiscretionary when employees know in advance that meeting some condition earns it: attendance, safety, production, hitting a sales number. Choosing the amount yourself does not make it discretionary; what matters is whether it was promised or expected.

Because the bonus is part of compensation for hours worked in an earlier week, it retroactively raises the regular rate for that week — which means the overtime paid at the old, lower rate was short. The remedy is a retroactive true-up.

Only genuinely discretionary payments escape this: a spontaneous holiday gift with no advance promise and no tie to performance. In our experience most bonuses employers describe as discretionary would not meet that standard if anyone looked closely.

Two formulas, and picking the wrong one underpays

This is where we see even careful payroll operations come apart. California does not use one method. It uses two, and the choice depends on whether the payment scales with output.

Commissions and production bonuses

A commission grows as the employee sells or produces more. Because it grows with output, it already compensates straight time for every hour worked, including the overtime hours. Only the premium half remains owed.

uplift    = bonus ÷ TOTAL hours worked
extra OT  = uplift × 0.5 × overtime hours

Flat-sum bonuses

A flat sum — attendance, safety, a fixed weekend-shift bonus — does not grow with output. Working more hours does not increase it. In Alvarado v. Dart Container Corp. (2018) the California Supreme Court held that because a flat sum cannot be said to compensate the overtime hours, the divisor must be non-overtime hours only, and the full 1.5× premium is owed.

uplift    = bonus ÷ NON-OVERTIME hours only
extra OT  = uplift × 1.5 × overtime hours

California departs from the federal rule here, and Alvarado expressly declined to extend its holding to commissions or production bonuses.

The difference is not small

Take the same week — 45 hours, 5 of them overtime, 40 non-overtime — and the same $200.

As a commission:

uplift   = 200 ÷ 45      = $4.44/hour
extra OT = 4.44 × 0.5 × 5 = $11.11

As a flat-sum bonus:

uplift   = 200 ÷ 40      = $5.00/hour
extra OT = 5.00 × 1.5 × 5 = $37.50

Same dollars, same week, same employee — $11.11 versus $37.50. Classifying a flat-sum attendance bonus as a commission underpays by more than three to one, on every affected week, for every affected employee.

Which is why we would treat naming a payment correctly at the moment of data entry as a compliance decision rather than a bookkeeping label. The person typing it in is making a legal choice, and usually does not know it.

Commissions earned in one period and paid in another

A common arrangement, and one we run ourselves: a commission is earned when the sale closes but paid only when the job is completed and collected — often a month or two later.

Federal regulation 29 CFR 778.120 addresses this directly. The commission is apportioned back over "the workweeks of the period during which it may be said to have been earned," and overtime is recomputed for each of those weeks. Where hours vary week to week, allocating in proportion to hours worked is the appropriate method.

Two consequences we would flag:

The earning period is usually the work period, not the payment period. The weeks whose labor produced the commission are the weeks that get trued up — unless the written plan clearly defines a later earning event. That is exactly why the plan's actual wording matters, and why we would keep every version of it.

Allocation happens on workweek boundaries. The regular rate is a per-workweek concept. Pay periods are irrelevant to the allocation, even though they are what payroll actually runs on.

Premiums move too

Since Ferra v. Loews Hollywood Hotel (2021), meal and rest period premiums are paid at the regular rate of pay rather than base hourly rate. So a commission that raises the regular rate for a week also raises the value of any premium owed for that week.

An employer trueing up overtime but not premiums has, in our view, fixed half the problem and may not realise it.

What we think this requires in practice

• Classify every additional payment as excluded, commission/production, or flat sum — at entry, with the person entering it understanding the question
• Retain the written plan wording for commissions; it defines the earning period
• Allocate by workweek, never by pay period
• Recompute both overtime and meal/rest premiums for affected weeks
• Itemize retroactive adjustments as their own line on the wage statement, per Labor Code section 226
• Keep the derivation, not just the result — the record of how each figure was computed is what you hand an investigator

The way we would put it: an employer who can show its arithmetic has a much better week than one who can only show a number.

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This article describes California and federal wage law in general terms and reflects our own opinion. It is not legal advice. Whether a specific payment is discretionary, and which allocation method applies to a specific plan, are fact-dependent questions. Consult your HR specialist or employment counsel.