IBC Injury Benefit Calc

Our Methodology

We believe that clear methodology is the foundation of trustworthy financial information. This page explains exactly how Injury Benefit Calc sources, validates, and updates the data behind every calculator and state page on this site. If something on our site disagrees with your insurer’s calculation, the difference is almost always explained here.

Overview

Injury Benefit Calc provides estimates of workers’ compensation weekly benefits and settlement amounts for all 50 U.S. states. Our calculators are based on:

  1. State-specific benefit formulas published by each state’s workers’ compensation agency
  2. Official rate schedules that set minimum and maximum weekly benefits
  3. Industry-standard impairment rating systems (AMA Guides editions mandated by each state)
  4. Industry settlement benchmarks from NCCI and WCRI for estimating settlement value

We do not calculate benefits using a single national formula. Each state’s calculator uses the exact formula specified by that state’s statute and administrative rules. The result is a more accurate estimate than a generic “two-thirds of wage” calculator can provide.

Data Sources

Primary: State Workers’ Compensation Agencies

For every state, we source benefit rates, formulas, and caps directly from the official state workers’ compensation agency. The full list of all 50 state agencies is on our Sources page. We update this data annually (typically in January or July, depending on the state’s rate-cycle), and we also re-verify it any time the state publishes a regulatory update.

For each state, we track:

  • Average Weekly Wage (AWW) calculation method — the period used to calculate pre-injury wages (e.g., 13 weeks in Texas, 52 weeks in New York)
  • TTD replacement rate — the percentage of AWW used for Temporary Total Disability (typically 66.67% or 70%)
  • PPD replacement rate — the percentage used for Permanent Partial Disability
  • PTD replacement rate — the percentage used for Permanent Total Disability
  • Minimum weekly benefit — the floor below which benefits cannot fall
  • Maximum weekly benefit — the cap above which benefits cannot rise
  • Maximum TTD duration — the hard time limit on TTD (e.g., 104 weeks in Texas, no limit in California)
  • Maximum PPD duration — either an impairment-multiplier (e.g., impairment% × 401 weeks in Texas) or a schedule of losses
  • AMA Guides edition — the impairment rating system mandated by the state (4th, 5th, or 6th Edition)
  • Official source URL — direct link to the state agency for verification

Secondary: NCCI and WCRI

The National Council on Compensation Insurance (NCCI) is the ratemaking organization for workers’ comp in most U.S. states. NCCI publishes:

  • Workers’ Compensation Rate Filings — the rate changes recommended to each state’s insurance regulator
  • Annual State of the Line Report — industry-wide loss cost trends
  • Detailed Claim Information — by injury type, industry, and state (used to estimate settlement values)

The Workers Compensation Research Institute (WCRI) is an independent research organization that publishes:

  • CompScope™ Benchmarks — interstate comparisons of benefit payments, durations, and outcomes
  • Industry-specific studies — by injury type (back, knee, shoulder, etc.) and industry (construction, healthcare, manufacturing, etc.)
  • Settlement value benchmarks — typical settlement amounts by injury severity

We use NCCI and WCRI data to estimate settlement value in our settlement calculator. NCCI and WCRI data are not used to determine the weekly benefit amount — that comes directly from each state’s statute and rate schedule.

Tertiary: AAOS, AMA Guides, BLS

For injury-specific data, we reference:

  • American Academy of Orthopaedic Surgeons (AAOS) — clinical references for common workplace injuries (back, knee, shoulder, etc.)
  • AMA Guides to the Evaluation of Permanent Impairment — the editions used by each state to rate impairment (4th, 5th, 6th Edition)
  • U.S. Bureau of Labor Statistics (BLS), Survey of Occupational Injuries and Illnesses (SOII) — national and state-level injury frequency data, used to contextualize our calculators and state pages

Weekly Benefit Calculation: Step by Step

For each state, our calculator performs the following steps:

  1. Determine the AWW based on the state’s awCalcMethod:
    • average_year — average weekly wage over the year (52 weeks) before injury. Most common method.
    • highest_quarter — average wage of the highest-paid quarter in the year before injury. Used by some states (e.g., older Pennsylvania rules).
    • highest_year — average wage of the highest-paid year in the 5 years before injury. Used by some states (e.g., older Massachusetts rules).
  2. Apply the replacement rate to the AWW: weekly = rate × AWW
  3. Apply the floor and cap: weekly = min(max, max(min, weekly))
  4. Apply state-specific adjustments:
    • Dependent supplements (some states increase benefits for dependents)
    • Cost-of-living adjustments (some states apply annual COLAs)
    • Special rules for specific injury types (e.g., scheduled injuries, catastrophic injuries)
  5. Return the result with a methodology string — a plain-language description of how the calculation was performed, so the user can verify the steps.

For PPD (Permanent Partial Disability), we additionally accept the impairment rating (1–100%) and apply the state’s schedule or multiplier to determine the total weeks payable.

For PTD (Permanent Total Disability), we apply the PTD rate to the AWW and use the same floor/cap logic as TTD.

Settlement Estimation Methodology

Settlement estimation is less precise than weekly benefit calculation, because settlements reflect negotiation, attorney negotiation, medical evidence, jurisdictional factors, and case-specific facts. We provide a 3-tier estimate (low, midpoint, high) based on:

  • Injury type — back, knee, shoulder, hand, eye, etc.
  • Severity — the impairment rating, MMI status, and whether surgery is required
  • State — settlements vary substantially by state due to differences in the schedule of losses, attorney fee regulation, and case law
  • Carrier and venue — some insurance carriers and counties have predictable settlement patterns

For each (state, injury type, severity) combination, we maintain a benchmark range based on WCRI and NCCI published data. These benchmarks are reviewed annually and updated when new data is published.

Important limitations of settlement estimation:

  • Settlements depend heavily on the specific facts of the case, the medical evidence, the insurance carrier, the jurisdiction, and the attorney (if any).
  • A first offer is rarely the best deal — most settlements are negotiated upward.
  • We do not have access to your specific case files, medical records, or carrier correspondence.
  • For advice specific to your case, consult a licensed workers’ comp attorney in your state.

Update Process

We update our data on a fixed annual cycle:

  1. November–December: We review each state’s rate schedule and confirm the new rates effective January 1 (or July 1, or September 1, depending on the state).
  2. January (or July, or September): We publish the new rates effective for the upcoming year.
  3. February: We cross-check our data against NCCI rate filings and BLS SOII data.
  4. March–April: We update each state page with the new rates.
  5. Throughout the year: We monitor state regulatory updates (administrative rule changes, court decisions, statutory amendments) and update the affected state pages as needed.

The “Last updated” date on each state page reflects the most recent update to that page. The “Effective date” on each rate table reflects the state’s official rate-cycle date.

Limitations

We are committed to transparency about our limitations:

  • We do not have access to your specific case files. Our calculators produce estimates based on the inputs you provide. The actual benefit amount depends on facts we don’t have access to (your specific medical evidence, your carrier’s interpretation of the statute, the jurisdiction’s case law, etc.).
  • We do not capture all state-specific adjustments. Some states have special rules for specific injuries, specific industries, or specific circumstances. Our calculators capture the major rules but may not capture every nuance.
  • Settlement estimation is approximate. Settlement values vary substantially based on the specific facts of the case, the attorney, the carrier, and the venue. Our 3-tier estimate is a starting point, not a guarantee.
  • We do not provide legal advice. For advice specific to your case, consult a licensed workers’ comp attorney in your state.
  • We are not a substitute for state agency resources. Each state’s workers’ comp agency can provide authoritative information about your specific claim.

How to Verify Our Data

To verify any number on our site:

  1. Find the relevant state page (e.g., /states/ca/)
  2. Look at the rate table and methodology section
  3. Follow the link to the official state agency in the “Sources” section at the bottom
  4. Cross-check the rate against the state’s official rate schedule
  5. If you find a discrepancy, contact us so we can correct the error

Editorial Independence

Injury Benefit Calc is editorially independent. We do not accept compensation from insurance carriers, attorneys, or any party with a financial interest in workers’ comp outcomes. Our funding comes from display advertising and (eventually) from optional premium features that do not affect the accuracy or availability of our calculators.

Contact

If you have questions about our methodology, find an error, or have a suggestion, please contact us. We review all feedback and update our data based on corrections from knowledgeable users.