Understanding Form 105 in Workers' Compensation: Complete Guide for Employers and Claimants

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What Is Form 105?

Form 105 is the official Workers' Compensation Claim Report used by many U.S. states (including California, New York, and Texas) to document an employee's injury or illness and initiate the benefits process. It captures essential facts—date of injury, nature of injury, employer information, and medical details—so insurers and state agencies can evaluate eligibility and calculate benefits.

Table of Contents

What Is Form 105?
When Should You File Form 105?
Key Sections of Form 105
1. Employee Information
2. Employer Details
3. Incident Description
4. Injury or Illness Details
5. Witnesses
6. Medical Provider Information
Step‑by‑Step Filing Process
Common Mistakes and How to Avoid Them
State‑Specific Variations (Snapshot)
What Happens After Submission?
Resources for Employers and Claimants
Bottom Line

When Should You File Form 105?

Filing timelines are strict because delayed claims can forfeit benefits. Generally, you must submit Form 105 within:

30 days of the injury for most states (e.g., California, Florida).
24 hours if the injury is fatal or results in a serious injury requiring immediate medical attention (e.g., New York).
Within the employer's internal reporting window, which often mirrors state law.

Always verify the specific deadline for your jurisdiction to avoid penalties.

Key Sections of Form 105

Understanding each part helps prevent errors that cause claim rejections.

1. Employee Information

Collect the worker's full name, Social Security number, address, and contact details. This data links the claim to payroll records and ensures the correct beneficiary receives benefits.

2. Employer Details

Include the legal business name, address, Federal Employer Identification Number (FEIN), and the name of the person responsible for workers' comp reporting. Some states also request the employer's insurance carrier and policy number.

3. Incident Description

Provide a concise narrative covering:

Date and exact time of the incident.
Location (worksite address, department, or specific area).
How the injury occurred (e.g., "slipped on wet floor while carrying a box").

Accurate, factual language is crucial; avoid speculation or legal jargon.

4. Injury or Illness Details

Specify the body part(s) affected, type of injury (laceration, sprain, occupational disease), and any immediate medical treatment provided. Include ICD‑10 codes if known, as many insurers require them for processing.

5. Witnesses

List any co‑workers or third parties who saw the incident, along with their contact information. Witness statements can support the claim if disputes arise.

6. Medical Provider Information

Record the name, address, and phone number of the treating physician or urgent‑care facility. Attach any initial medical reports, X‑rays, or lab results if available.

Step‑by‑Step Filing Process

Follow these steps to ensure a smooth submission:

Notify your supervisor immediately. Most states require verbal notification within 24 hours.

Gather required documents. Payroll records, incident reports, and medical notes are essential.

Complete Form 105. Use the official state‑provided PDF or online portal; avoid third‑party templates.

Review for accuracy. Double‑check names, dates, and codes; a single typo can delay payment.

Submit to the appropriate agency. This may be the state workers' compensation board, the employer's insurance carrier, or a private claims administrator.

Retain a copy. Keep a dated copy for your records and future reference.

Common Mistakes and How to Avoid Them

Even seasoned HR staff can slip up. Below are frequent errors and practical fixes.

Missing deadline. Set calendar alerts 7 days before the statutory deadline.
Incomplete injury description. Use the "who, what, when, where, how" framework.
Incorrect employer FEIN. Verify the number against payroll tax filings.
Omitting witness information. Interview coworkers on the spot; record names before they leave the site.
Failing to attach medical documentation. Request a copy of the initial provider's note before submitting.

State‑Specific Variations (Snapshot)

State	Form 105 Name	Filing Deadline	Unique Requirement
California	WC‑1 (Employer's First Report of Injury)	Within 30 days	Must include employer's workers' comp policy number.
New York	Form 105 (Employer's Report of Injury/Illness)	Within 30 days (24 hrs for serious injury)	Requires physician's certification if injury > 7 days.
Texas	Form 105 (Employer's Report)	Within 30 days	Electronic submission preferred via the Texas Dept. of Insurance portal.

What Happens After Submission?

Once Form 105 reaches the designated authority, the typical workflow is:

Claim intake. The agency logs the claim and assigns a case number.

Eligibility review. Payroll records are cross‑checked; the injury is classified.

Medical assessment. An independent medical examiner may be appointed.

Benefit determination. Temporary disability, permanent disability, or medical benefits are calculated based on state wage‑replacement formulas.

Payment issuance. Benefits are disbursed either to the employee directly or to the medical provider.

If additional information is required, the agency will issue a "Request for Additional Information" (RAI) notice. Respond promptly to keep the claim moving.

Resources for Employers and Claimants

These free, authoritative resources can help you complete Form 105 correctly:

U.S. Department of Labor – Workers' Compensation Overview
California Dept. of Industrial Relations – WC‑1 Guidance
New York Dept. of Labor – Form 105 Download
Texas Dept. of Insurance – Workers' Comp Portal

Bottom Line

Form 105 is the cornerstone document for starting a workers' compensation claim. Filing it accurately and on time safeguards an employee's right to medical care and wage replacement while protecting employers from costly disputes. Use the checklist above, consult your state's official guidance, and keep thorough records to ensure a smooth claims process.