TTD vs TPD in California Workers' Comp

When does TTD apply?

TTD applies when the accepted work injury and current medical restrictions keep you from doing any available paid work.

Temporary total disability usually starts when the doctor says you cannot work because of the industrial injury. The restriction may come from the primary treating doctor, a QME, or an AME. The point is not whether you feel pain. The point is whether the medical record takes you off work.

Labor Code 4653 controls temporary total disability. The payment is based on average weekly earnings, subject to state minimum and maximum rates. Standard rate figures should be read from the current table.

TTD can end when a doctor returns you to work, when an employer offers valid modified duty, when you reach MMI, or when the statutory cap is exhausted. A carrier cannot stop TTD just because it wants a cheaper file. There should be a medical or legal basis for the stop.

When does TPD apply?

TPD applies when you can work with restrictions, but the injury causes reduced hours, lower pay, or lost overtime.

Temporary partial disability is the middle ground. You are not fully off work, but you are not earning your old wage either. Labor Code 4654 addresses this partial wage loss. The payment should make up part of the gap between pre-injury earnings and current injury-limited earnings.

A common example is a worker who returns to light duty for fewer hours. Another is a driver moved to a lower-paying desk task while a back injury heals. A third is a warehouse worker who keeps base pay but loses regular overtime because lifting limits prevent the usual assignment.

The calculation should be tied to real payroll records. It should not be guessed from an old schedule. If hours change each week, the TPD amount may need to change each week too.

Why do TTD and TPD underpayments happen?

Underpayments happen when payroll history, overtime, second jobs, tips, bonuses, or changing light-duty wages are left out.

The wage base is often the first problem. Average weekly earnings can include more than base hourly pay. Overtime, shift differentials, commissions, and some reported tips may matter. If the administrator uses only a short or incomplete payroll snapshot, the weekly benefit can be too low.

The second problem is timing. The first check may be late. Later checks may not match the correct pay period. When the administrator misses the required timing, a penalty or increase may be owed. The claim file should be checked against each check date and each covered period.

The third problem is partial work. TPD requires fresh math when actual earnings vary. A fixed estimate can underpay a worker who gets sent home early, loses overtime, or misses shifts because the employer cannot provide work within restrictions.

What should you do before accepting a temporary disability calculation?

Compare the benefit notice with pay stubs, doctor notes, work offers, overtime history, and every check issued by the claims administrator.

Start with the doctor note. It should say whether you are off work, on modified work, or released to regular work. Then compare that status with the employer's actual job offer. A light-duty job is only useful if it matches the restrictions on paper and in real life.

Next, review wage records. A good audit looks at the earning pattern before injury, including overtime and other compensation. It also reviews any second job that the injury affected. A low wage base can shrink every future temporary disability check.

Finally, match checks to dates. A payment ledger can reveal missed periods, late checks, or weeks that were paid at the wrong status. Those errors are fixable when the record is clear.

How should changing hours be handled?

Changing hours should trigger a fresh TPD review for that pay period, using actual injury-limited earnings instead of estimates.

Many partial disability errors happen after the worker returns to a schedule that changes. One week may include training. Another week may include fewer shifts because the employer has no work within restrictions. Another week may include lost overtime.

The administrator should not treat every week the same when the pay is different. The worker should keep timecards, schedules, pay stubs, and notes about why hours were missed. Those records show whether the wage loss came from the injury limits.

Light duty should also be real. A worker should not be asked to perform tasks outside the doctor's limits just to avoid TTD. If the job changes, the doctor may need to review the new duties.