How Workers' Comp is Calculated (Simple Explanation)

Workers' Comp Math Isn't Complicated — Once You Know the Formula

Most injured workers have no idea how their benefit check is calculated. They just get a number from the insurance company and assume it's correct. Sometimes it is. Sometimes it isn't — and the difference can cost you thousands of dollars over the life of your claim.

Here's the thing: workers' comp benefits follow a straightforward formula. If you can do basic arithmetic, you can verify whether you're getting paid correctly. And you should verify it, because overpayments are rare while underpayments are shockingly common.

Let's break the entire calculation down, step by step.

The Core Formula: Average Weekly Wage x Benefit Rate

Every workers' comp benefit calculation starts with two numbers:

Your Average Weekly Wage (AWW) x Your State's Benefit Rate = Your Weekly Benefit

That's it. Two numbers multiplied together. The complexity — and there is some — lives in how those two numbers are determined.

Step 1: Calculate Your Average Weekly Wage (AWW)

Your Average Weekly Wage is the foundation of everything. Get this number wrong and every benefit payment that follows will be wrong too.

Most states calculate AWW by taking your total earnings over a defined lookback period and dividing by the number of weeks worked. The lookback period varies:

| State | AWW Lookback Period | |---|---| | California | 52 weeks before injury | | Texas | 13 weeks before injury | | New York | 52 weeks before injury | | Florida | 13 weeks before injury | | Illinois | 52 weeks before injury | | Pennsylvania | Highest 3 of last 4 quarters | | Ohio | Full weeks in 52-week period | | Georgia | 13 weeks before injury (excluding partial weeks) | | Michigan | Highest 39 of 52 weeks | | New Jersey | 26 weeks before injury |

Why does the lookback period matter? Because it dramatically affects your AWW if your income fluctuates.

A retail worker in Florida who earned $42,000 in the 13 weeks before injury (holiday season overtime) would have an AWW of $3,230.77. But that same worker calculated over 52 weeks might only average $865.38 per week — their normal rate without overtime. Florida's 13-week lookback actually helps this worker. In a state using 52 weeks, they'd get a much lower benefit.

What Counts as "Wages" for AWW?

This trips up a lot of workers — and a lot of insurance adjusters.

AWW includes more than just your base hourly rate or salary. In most states, your AWW should include:

• Base wages (hourly pay or salary)
• Regular overtime pay
• Commissions and bonuses
• Tips (if documented)
• Employer-provided housing or vehicle value
• Shift differentials and hazard pay

Overtime inclusion varies significantly by state. California includes overtime. Texas generally doesn't. Illinois includes overtime if it's "regular and consistent." New York includes it if you regularly worked overtime.

A construction foreman in New York earned a base salary of $1,400 per week plus consistent overtime averaging $380 weekly. His AWW should be $1,780, not $1,400. That $380 per week difference translates to $253.33 more in weekly benefits — or $13,173 over a year of disability. If the insurance company calculated his AWW without overtime, he'd be significantly underpaid.

AWW for Workers with Multiple Jobs

Do you work two jobs? If you were injured at one of them, the AWW calculation depends on your state. Some states only count wages from the employer where the injury occurred. Others count all concurrent employment.

Pennsylvania is notably worker-friendly here — they consider wages from all concurrent employers when calculating AWW. So a nurse working at two different hospitals who gets injured at Hospital A would have her benefits based on combined earnings from both jobs.

AWW for New Employees

What if you've only worked at your job for three weeks? You can't average 52 weeks of wages that don't exist.

Most states handle this by using a "similar employee" method — they look at what a comparable worker in the same position earns and use that as your AWW. California specifically allows this approach. In Georgia, the statute directs adjudicators to determine an amount that "reasonably represents" what the employee would have earned.

Step 2: Apply Your State's Benefit Rate

Once you know your AWW, you multiply it by your state's benefit rate percentage. Most states use 66.67% (two-thirds) for Temporary Total Disability benefits, but not all.

| State | TTD Benefit Rate | 2026 Max Weekly | 2026 Min Weekly | |---|---|---|---| | California | 66.67% | $1,619.15 | $242.86 | | Texas | 70% (first 26 wks), 75% w/dependents | $1,133.00 | $169.00 | | New York | 66.67% | $1,145.43 | $275.00 | | Florida | 66.67% | $1,197.00 | $20.00 | | Illinois | 66.67% | $1,798.27 | $269.74 | | Pennsylvania | 66.67% | $1,325.00 | $596.26 | | Ohio | 72% (first 12 wks), 66.67% after | $1,081.00 | $270.25 | | Georgia | 66.67% | $775.00 | $50.00 | | Michigan | 80% of after-tax wages | $1,048.00 | varies | | Iowa | 80% of spendable (after-tax) | $2,040.00 | varies |

Look — Iowa and Michigan stand out. They calculate benefits based on after-tax wages rather than gross wages, which actually results in a higher effective replacement rate. Iowa's 80% of spendable earnings can get workers closer to their actual take-home pay than the 66.67% of gross wages used in most states.

Step 3: Apply Maximum and Minimum Caps

Your calculated benefit gets clamped between your state's minimum and maximum weekly benefit amounts. These caps exist because states don't want to pay unlimited benefits to high earners — and they want to ensure low-wage workers receive at least a subsistence amount.

Here's where high earners get hurt. A software developer in Georgia earning $3,200 per week would calculate to $2,133.33 in TTD benefits (66.67% x $3,200). But Georgia's max is just $775.00 per week. That worker would receive $775 — less than 25% of their pre-injury earnings.

Want to see your exact numbers? Our workers' comp calculator handles all of this automatically for your state and wage level.

Full Calculation Walkthrough: Three Real Examples

Let me walk you through three complete calculations so you can see exactly how this works in practice.

Example 1: Warehouse Worker in California

Facts:

• Injured on March 15, 2026
• Hourly rate: $22.50
• Works 40 hours/week with regular overtime of 8 hours/week at 1.5x
• Lookback: 52 weeks

AWW Calculation:

• Regular weekly pay: $22.50 x 40 = $900.00
• Overtime weekly pay: $33.75 x 8 = $270.00
• Total AWW: $1,170.00

Benefit Calculation:

• $1,170.00 x 66.67% = $780.04
• California 2026 max: $1,619.15
• California 2026 min: $242.86
• Weekly TTD benefit: $780.04 (within min/max range)

Over 26 weeks of disability, this worker receives $20,281.04 in wage replacement.

Example 2: Restaurant Manager in Texas

Facts:

• Injured on February 1, 2026
• Annual salary: $58,500
• No overtime (salaried exempt)
• Lookback: 13 weeks

AWW Calculation:

• $58,500 / 52 = $1,125.00 per week
• Texas uses 13-week lookback: consistent salary = same AWW
• AWW: $1,125.00

Benefit Calculation:

• First 26 weeks at 70%: $1,125.00 x 70% = $787.50
• Texas 2026 max: $1,133.00
• Weekly TTD benefit (first 26 weeks): $787.50
• After 26 weeks at 75% (with dependents): $843.75

Honestly, Texas's higher initial rate of 70% (versus the standard 66.67%) makes a meaningful difference — $37.50 more per week, adding up to $975 over the first 26 weeks.

Example 3: Electrician in Georgia

Facts:

• Injured on January 10, 2026
• Hourly rate: $31.00
• Works 40 hours/week, occasional overtime averaging 4 hours/week
• Lookback: 13 weeks (excluding partial weeks)

AWW Calculation:

• Regular weekly pay: $31.00 x 40 = $1,240.00
• Overtime weekly pay: $46.50 x 4 = $186.00
• Total AWW: $1,426.00

Benefit Calculation:

• $1,426.00 x 66.67% = $950.71
• Georgia 2026 max: $775.00
• Weekly TTD benefit: $775.00 (capped at state maximum)

This electrician is losing $175.71 per week due to Georgia's cap — that's $9,136.92 over a year. Georgia's low maximum weekly benefit is one of the worst in the country for skilled tradespeople and middle-income workers.

How Permanent Partial Disability (PPD) Is Calculated

PPD calculations are a different animal entirely. When you reach Maximum Medical Improvement (MMI) with a lasting impairment, your doctor assigns an impairment rating — a percentage representing how much function you've permanently lost.

The PPD calculation uses this impairment rating combined with schedules that assign dollar values to specific body parts and functions. There are two main approaches:

Scheduled injuries involve specific body parts listed in your state's statute. Each body part has a set number of weeks of compensation. Lose a finger? Your state's schedule says how many weeks you get paid.

| Body Part | California (Weeks) | New York (Weeks) | Illinois (Weeks) | Florida (Weeks) | |---|---|---|---|---| | Thumb | varies by rating | 75 | 76 | 62 | | Index finger | varies by rating | 46 | 43 | 35 | | Hand | varies by rating | 244 | 205 | 168 | | Arm | varies by rating | 312 | 253 | 211 | | Foot | varies by rating | 205 | 167 | 131 | | Leg | varies by rating | 288 | 215 | 196 | | Eye | varies by rating | 160 | 162 | 128 | | Hearing (one ear) | varies by rating | 60 | 54 | 52 |

California uses a more complex formula that factors in your age, occupation, and diminished future earning capacity rather than a simple schedule. I'd recommend injured California workers use an attorney or our calculator for PPD estimates — the formula involves multiple variables that interact in non-obvious ways.

Unscheduled injuries (like back injuries) don't appear on the body part schedule. These are calculated differently — often based on a percentage of your AWW multiplied by the impairment rating and a set number of weeks. The formulas get complicated and vary dramatically by state.

A nurse in Illinois with a 15% whole-body impairment rating from a back injury would receive: 15% x 500 weeks (maximum for non-scheduled injuries) = 75 weeks of PPD benefits at 60% of AWW. If her AWW was $1,200, that's $720 per week for 75 weeks = $54,000 total.

How Temporary Partial Disability (TPD) Is Calculated

TPD kicks in when you return to work but earn less than before — maybe you're on light duty, working fewer hours, or in a lower-paying modified position.

The formula for TPD is simpler:

(Pre-injury AWW - Current Earnings) x Benefit Rate = TPD Payment

Say you earned $1,000 per week before injury and now earn $600 per week on light duty. In a 66.67% state:

($1,000 - $600) x 66.67% = $266.68 per week in TPD

This payment supplements your reduced earnings so you receive $866.68 total ($600 earnings + $266.68 TPD). You still earn less than before, but the gap is partially closed.

Factors That Can Change Your Benefit Amount

Several things can increase or decrease what you actually receive:

• Cost of living adjustments (COLA): Some states adjust benefits annually for inflation. Ohio and California apply COLA to long-term disability payments
• Dependent allowances: States like Indiana and Connecticut add extra benefits for dependents
• Social Security offsets: If you receive SSDI alongside workers' comp, one or both benefits may be reduced to prevent "double-dipping" above 80% of your pre-injury earnings
• Pension offsets: Some states reduce workers' comp if you receive a government pension
• Waiting period credits: Most states have a 3 to 7 day waiting period before benefits start. If your disability exceeds a retroactive period (typically 14-21 days), you get paid for those waiting days retroactively
• Attorney fees: If you hire a lawyer, their fee (usually 15-20%) comes out of your award

The Social Security offset catches many workers off guard. A permanently disabled worker in Massachusetts receiving $1,800 per week in workers' comp and $2,200 per month in SSDI might have one benefit reduced so the combined total doesn't exceed 80% of their pre-injury average current earnings.

Why Insurance Companies Get the Calculation Wrong

Insurance adjusters process hundreds of claims. Mistakes happen. But the "mistakes" almost always seem to go in one direction — lower benefits for the worker.

Common calculation errors include:

• Excluding overtime that should have been included in AWW
• Using the wrong lookback period
• Not counting bonuses, commissions, or tips
• Applying the wrong benefit rate
• Using outdated maximum/minimum caps
• Miscalculating the waiting period credit
• Not including concurrent employment wages where applicable
• Rounding down at every step

After researching claim audits published by several state workers' comp boards, I've found that benefit underpayment rates range from 8% to 19% depending on the state. That means roughly one in six workers is receiving less than they're legally owed.

How do you protect yourself? Run the calculation yourself using our workers' comp calculator and compare the result to what the insurance company is paying. If the numbers don't match, request a detailed breakdown from the adjuster showing exactly how they calculated your AWW and weekly benefit.

Death Benefit Calculations

When a workplace injury or illness is fatal, death benefits are calculated for surviving dependents. The formulas differ by state but generally follow this pattern:

Surviving spouse with children: 66.67% of the deceased worker's AWW in most states, subject to the state maximum. Texas pays 75%.

Surviving spouse without children: Often a lower percentage or limited duration. In some states, benefits end upon remarriage.

Children only (no surviving spouse): Benefits divided equally among dependent children, typically continuing until age 18 or 23 if enrolled in school.

A married ironworker in New York earning $2,100 per week who dies in a construction accident would leave his surviving spouse with $1,145.43 per week (the 2026 maximum, since 66.67% of $2,100 = $1,400.07 exceeds the cap). Over 10 years, that totals $595,622.36 in wage replacement alone, plus the $12,500 burial benefit.

The Waiting Period: When Benefits Actually Start

Don't expect a check on day one. Every state imposes a waiting period — typically 3 to 7 days — before wage replacement benefits begin.

| State | Waiting Period | Retroactive Period | |---|---|---| | California | 3 days | 14 days | | Texas | 7 days | 14+ days | | New York | 7 days | 14 days | | Florida | 7 days | 21 days | | Illinois | 3 days | 14 days | | Pennsylvania | 7 days | 14 days | | Ohio | 7 days | 14 days | | Georgia | 7 days | 21 days |

The "retroactive period" is key. If your disability lasts longer than the retroactive threshold, you get paid for the waiting period days retroactively. So in California, if you're off work for 15 days, you get paid for all 15 — including the first 3 days that were initially unpaid.

Medical benefits have no waiting period. You're covered from the moment the injury occurs.

Calculating Your Benefits Takes 5 Minutes

The bottom line? Workers' comp calculations follow predictable formulas that you can verify yourself. Don't blindly trust the insurance company's numbers. Calculate your AWW carefully, apply your state's benefit rate, and check against the current maximum and minimum caps.

Your best bet is to use our workers' comp calculator — it handles all the state-specific variables, lookback periods, benefit rates, and caps automatically. Plug in your state, your wages, and your injury details, and you'll get an accurate estimate in minutes.

If the calculator's estimate is significantly higher than what you're receiving, that's a red flag worth investigating — either with your adjuster or an attorney.

FAQ

How is average weekly wage calculated if I work irregular hours?

States handle this differently, but the general approach is to total your earnings over the lookback period and divide by the number of weeks you actually worked (not calendar weeks). If you worked 42 out of 52 weeks, your total earnings are divided by 42, not 52. Some states exclude your highest and lowest earning weeks to smooth out anomalies. Georgia specifically excludes partial weeks from the 13-week lookback.

Do workers' comp benefits get taxed?

No. Workers' comp wage replacement benefits are not subject to federal income tax. They're also exempt from state income tax in all 50 states and from Social Security and Medicare taxes. However, if you receive both workers' comp and Social Security Disability Insurance, a portion of your SSDI may become taxable depending on your combined income.

Can my workers' comp benefit amount change over time?

Yes. Your benefit can change for several reasons: you transition from TTD to TPD as you return to light duty, your state applies a cost-of-living adjustment, your benefit type changes from temporary to permanent, or you begin receiving Social Security benefits that trigger an offset. Any change should be communicated to you in writing by the insurance carrier.

What if I think my benefit was calculated wrong?

Request a detailed calculation breakdown from the insurance adjuster, including the exact wages used, the lookback period, and the benefit rate applied. Compare it to your pay stubs and tax records. If you find a discrepancy, notify the adjuster in writing. If they refuse to correct it, you can file a dispute with your state's workers' comp board. Many states impose penalties on carriers that knowingly underpay benefits.

How are benefits calculated for commission-based workers?

Commission income is included in your AWW calculation in virtually every state. The challenge is determining the lookback period that fairly represents your typical earnings. A salesperson with seasonal peaks may want to argue for a longer lookback period that captures the full cycle. Your total commissions over the lookback period, divided by the number of weeks, gives your commission-based AWW component.

Does workers' comp pay more if I have dependents?

In some states, yes. Indiana adds 8% for a dependent spouse and 5% per dependent child (up to a cap). Connecticut, Maine, and several other states provide dependent allowances. Most states, however, pay the same flat percentage regardless of family size. Check your specific state's statute to see if dependent allowances apply.

How is workers' comp calculated for two concurrent jobs?

This depends on your state. Some states (like Pennsylvania) include wages from all concurrent employers, even if the injury only occurred at one job. Others only consider wages from the employer where the injury happened. If you work two jobs and are injured at one, ask specifically whether your state permits concurrent wage inclusion — it can significantly increase your AWW and weekly benefit.

What happens to my benefit calculation if I was working overtime when I got injured?

Overtime itself doesn't affect which calculation method is used — it affects the dollar amount of your AWW. If you regularly worked overtime, those additional earnings should be included in your AWW. The key word is "regularly." Occasional overtime may be excluded in some states. Consistent overtime — say, 10 extra hours per week for the past year — almost certainly should be included. Keep your pay stubs as proof of your overtime history.

Sources

• U.S. Department of Labor — Office of Workers' Compensation Programs: dol.gov/agencies/owcp
• California Division of Workers' Compensation — Benefit Amounts: dir.ca.gov/dwc
• New York Workers' Compensation Board — Benefit Schedules: wcb.ny.gov
• Texas Department of Insurance — Income Benefit Calculations: tdi.texas.gov/wc
• Illinois Workers' Compensation Commission — Rate and Fee Information: iwcc.il.gov
• Ohio Bureau of Workers' Compensation — Benefit Rate Tables: bwc.ohio.gov
• National Council on Compensation Insurance — Annual Statistical Bulletin 2026: ncci.com
• U.S. Bureau of Labor Statistics — Occupational Injuries: bls.gov/iif