Light Duty at Lower Pay: How California Temporary Partial Disability Is Calculated

Review the primary official source.

California Labor Code section 4654 provides temporary partial disability compensation at two-thirds of the weekly loss in wages, subject to statutory limits and offsets. Section 4657 describes weekly loss as the difference between the employee’s average weekly earnings and the amount the employee will probably be able to earn during the disability.

The basic wage-loss formula

A simple illustration: if the accepted average weekly earnings figure is $1,200 and the worker earns $750 during a week of medically restricted work, the raw wage loss is $450. Two-thirds is $300 before applying the governing minimum, maximum, credits, and any other case-specific rules. This illustration is not a benefit determination.

Use weekly evidence, not one paycheck

Collect pre-injury wage records sufficient to test average weekly earnings and post-injury paystubs for every claimed week. Match the pay periods to the actual days worked. Identify overtime, bonuses, shift differentials, tips, concurrent earnings, sick leave, vacation, and employer wage continuation separately.

A biweekly check can hide a week with no hours and a week with full hours. A payroll correction can make an apparent underpayment disappear or create a new one. A week-by-week table makes the calculation auditable.

Medical restrictions connect the wage loss to the injury

Preserve each work-status report and the date it was delivered to the employer. Record the hours and duties offered, whether they complied with the restrictions, and the worker’s actual performance. A lower paycheck alone does not establish that the industrial disability caused the reduction.

If no modified work is available, the issue may concern temporary total disability rather than partial wage loss. If suitable work is offered and declined, probable earning ability may become relevant. The reason work was unavailable or not performed should be documented rather than assumed.

Statutory maximums can change the intuitive answer

Temporary-disability benefits operate within statutory rate limits tied to the date of injury and other rules. A highly paid worker can experience a real reduction in income yet receive less than two-thirds of the actual dollar difference because the maximum average weekly wage limits the compensable calculation.

Use the applicable DWC benefit chart for the date of injury and verify whether a later adjustment rule applies. Do not substitute the worker’s current wage or a website calculator for the record required by the statute.

Build a transparent worksheet

For every week, list the accepted average weekly earnings figure, actual or probable post-injury earnings, wage loss, two-thirds calculation, applicable rate limit, payments received, and claimed difference. Attach the source paystub and work-status report.

That worksheet helps identify the real dispute: average weekly earnings, missing payroll, noncompliant modified work, availability of work, statutory maximum, credit, or arithmetic. It also gives the claims administrator a concrete issue to investigate and correct.

For broader claim guidance, review the firm’s California workers’ compensation practice and the primary-source Case Library.