Lost Wages After an Injury in California: How to Prove Them

You got hurt, you missed work, and now the rent is due on a smaller paycheck. You know the person who hurt you should cover what you lost, but nobody has explained what counts, how you prove it, or why the adjuster keeps asking for documents you did not know existed. This post walks through how lost income works in a California injury claim and how to build the paper trail that gets it paid.

Lost wages and lost earning capacity are two different things

Most people think of lost income as one number. California law treats it as two separate losses, and they are proved differently.

Lost earnings are the money you actually did not earn because of the injury. The California civil jury instruction on this, CACI No. 3903C, splits it into past lost earnings, meaning income you have lost up to now, and future lost earnings, meaning income you are "reasonably certain to lose in the future as a result of the injury."

Lost earning capacity is the damage to your ability to earn going forward. Under CACI No. 3903D, you have to show it is reasonably certain the injury will cause you to earn less in the future than you otherwise could have, and the jury values that loss by comparing what you probably could have earned without the injury to what you can still earn with it.

The difference matters most when an injury does not fully heal. Someone who misses six weeks and goes back to the same job at the same pay has a lost wages claim. Someone who goes back but can no longer lift, stand all shift, or take the overtime they used to rely on may also have a lost earning capacity claim, and that one is often worth more.

What counts as lost income

The obvious item is the hourly pay or salary for days you could not work. But the claim is broader than that, and insurers rarely volunteer the rest. Things that commonly belong in the calculation:

• Regular wages or salary for missed shifts and days
• Overtime you regularly worked and lost
• Tips, commissions, and bonuses tied to being on the job
• Time off for medical appointments, physical therapy, and imaging, not just the days right after the crash
• Gig or freelance income you could not take on
• Raises, promotions, or a new job you lost because of the injury

"I used my sick days, so I didn't lose anything." You did.

This is one of the most common reasons people undercount their claim. If you burned through paid sick leave or vacation to cover your recovery, the insurer may argue you were paid in full, so there is no wage loss.

California's collateral source rule pushes back on that. In Helfend v. Southern California Rapid Transit District, the California Supreme Court held that compensation you receive "from a source wholly independent of the tortfeasor" is not deducted from the damages the person who hurt you owes. In Arambula v. Wells, a Court of Appeal applied that reasoning to wages an employer kept paying an injured worker voluntarily, writing that "no reason exists in these circumstances to confer a bonanza upon the party causing the injury." The court did treat that presumption as rebuttable, so the facts of how and why you were paid still matter.

The practical takeaway: tell whoever is handling your claim exactly how your missed time was covered, whether by sick leave, PTO, an employer who kept paying you, or disability benefits.

How to prove it if you are an employee

For a W-2 employee, the proof is usually simple, as long as you collect it early:

• Pay stubs from before the injury showing your normal rate and hours
• A letter from your employer on letterhead stating your position, pay rate, usual schedule, and the dates you missed. Ask HR, not just your supervisor.
• Doctor's notes taking you off work or putting you on restrictions. Without these, the insurer will argue you chose to stay home.
• Your PTO and sick leave balance before and after, so the hours you used are documented
• Tax returns or W-2s if the claim involves future losses or a long absence

The doctor's note is the piece people most often skip. If your physician never wrote down that you could not work, or that you were limited to light duty, the gap becomes the adjuster's main argument. The same is true of gaps in medical treatment generally.

If you are self-employed or drive for an app

Proving lost income without a pay stub is harder, but it is not impossible, and you do not need a perfect record to start. The Sources and Authority to CACI No. 3903C cite Rodriguez v. McDonnell Douglas Corp., where the court said it knew "of no rule of law that requires that a plaintiff establish the amount of his actual earnings" to recover, though actual earnings help the jury when they are available.

What helps you here:

• Tax returns and 1099s for the last few years, which show your normal income level
• Platform earnings statements from rideshare or delivery apps, which usually show weekly totals and hours online
• Invoices, contracts, or bookings you had to cancel, along with any emails or texts showing a client went elsewhere
• Bank deposits showing your usual monthly income
• A calendar showing the work you normally would have done

Be ready for one specific pushback. If your tax returns report lower income than you are claiming, expect the insurer to hold you to the tax return. Claim what you can document.

What this means in California

A few California rules frame every lost income claim:

• The two-year deadline. Under CCP § 335.1, you generally have two years from the date of injury to file a personal injury lawsuit. If a city, county, or transit agency is involved, a government claim is usually due within six months.
• Comparative fault. California uses pure comparative negligence. If you are found partly at fault, your total damages, lost income included, are reduced by your percentage of fault rather than wiped out.
• No work history required for earning capacity. CACI No. 3903D states directly that "it is not necessary" for the injured person to have a work history. A student, a new graduate, or someone between jobs can still claim lost earning capacity, measured by the careers they had a reasonable probability of achieving.
• Disability benefits while you wait. If you paid into State Disability Insurance and cannot do your regular work for at least eight days because of a non-work injury, you may qualify for EDD Disability Insurance benefits. If you were hurt on the job, that runs through workers' comp instead. We cover that situation in car accidents while working.

Where insurers push back

Expect the adjuster to test every piece of this. Common moves include treating your return to work as proof you are fully recovered, arguing that a light-duty offer you turned down cuts off your wage claim, ignoring overtime because it was not guaranteed, and valuing future losses at zero because they have not happened yet.

The defense to all of these is documentation made at the time, not reconstructed later. It is also a reason not to settle early. An offer made while you are still off work cannot account for losses nobody has measured yet, which is a big part of why the first offer is almost always a lowball.

What to do this week

Start a folder. Put in your last few pay stubs or tax returns, every doctor's note about work, and a simple log of each day or partial day you missed and why. Ask HR for a wage-loss letter now, while the people who know your schedule still remember it. If you are self-employed, download your platform statements and bank records before they roll off the app. If you want someone to look at whether you are counting everything, a free consultation costs nothing and there is no fee unless there is a recovery.