If you are wondering how long to keep workers’ comp records, the answer is that it depends on your state, the type of record, and whether other federal rules also apply. Workers’ compensation records retention by the state is not uniform, which means employers should avoid using a one-size-fits-all retention policy. In many cases, businesses must consider not only state workers’ compensation rules, but also OSHA recordkeeping requirements, medical record retention rules, and related HR laws such as the FMLA and ADA. OSHA generally requires employers to retain the OSHA 300 Log, OSHA 301 Incident Report, annual summary, and privacy case list for five years after the end of the calendar year covered by the records. FMLA regulations generally require covered employers to keep required records for at least three years.
Keeping these records is about more than simple paperwork. A well-documented file can help support a claim, respond to an audit, address a dispute with an insurance carrier, and protect your business if questions arise months or even years after an injury occurs. Because workers’ comp cases often involve medical treatment, wage replacement, return-to-work issues, and accommodation questions, record retention should be handled carefully and consistently.
Workers’ compensation records serve as the foundation for documenting workplace injuries and showing how a claim was handled. These files can include the initial injury report, employee statements, witness statements, medical reports, benefit payment records, communication with the insurer, and return-to-work documentation. If an employee disputes a claim decision, requests additional treatment, or reopens an issue tied to an earlier injury, these records can become essential.
Good record retention practices also help businesses stay organized during insurance audits and regulatory reviews. Employers that cannot produce records when needed may have a harder time defending claim decisions or proving compliance with workplace safety and employment rules. OSHA’s recordkeeping framework is specifically intended to help employers, employees, and regulators identify hazards and improve workplace safety, which is one reason injury documentation should be taken seriously from the start.
There is no single nationwide rule that answers how long to keep workers' comp records. The correct retention period depends on state law, the status of the claim, the type of documents in the file, and whether related federal rules extend the timeline.
In practice, employers should keep workers’ compensation records for at least the minimum period required by their state and then consider whether a longer period makes sense based on claim activity, future medical treatment, litigation risk, or overlapping federal requirements. For example, California has a five-year record rule for certain workers’ compensation files, while OSHA medical and exposure record rules can require much longer retention periods in some situations.
Workers’ compensation records retention by the state varies because each state runs its own workers’ compensation system. Some states have clearer retention rules than others, while in other states, employers may need to rely on agency guidance, broader employment recordkeeping rules, and legal advice when building a policy.
California is one of the better-known examples. The California Division of Workers’ Compensation provides that, after five years from the date of filing of the initial application, certain correspondence and miscellaneous material may be eliminated from the adjudication file, subject to the rule’s requirements. California is also widely cited for a five-year framework tied to workers’ compensation record handling and claim timing.
This state-by-state variation is exactly why employers should not assume that a rule from one jurisdiction applies everywhere else. A business operating in multiple states should review each state’s workers’ compensation requirements and apply the retention rule that fits the specific jurisdiction and record type involved. For a broader overview of how these systems differ, Assured Standard’s guide on who regulates workers’ compensation is a useful related resource.
A complete workers’ compensation file usually includes more than the injury claim form alone. Employers should retain the core documents tied to the incident and any related employment issues that follow.
This category includes the first report of injury, internal incident reports, supervisor notes, witness statements, photographs, and any investigation materials created after the accident. These records help establish what happened, when it happened, and how the employer responded.
This part of the file may include claim forms, adjuster communications, payment records, settlement paperwork, denials, benefit notices, and correspondence with the workers’ compensation carrier or state agency. These documents are often the records most likely to be needed during a dispute or audit.
Medical restrictions, work status reports, release-to-work notes, treatment summaries, and accommodation-related communications may all become important when managing a claim. Certain OSHA rules require employee exposure records to be kept for at least 30 years, and medical records for exposed employees may need to be retained for the duration of employment plus 30 years, subject to specific exceptions.
Workers’ compensation claims often overlap with leave and accommodation laws. If an injured employee takes protected leave or requests workplace accommodations, businesses may also need to retain related FMLA and ADA records. FMLA regulations generally require covered employers to maintain required records for no less than three years, while EEOC regulations generally require employers to keep personnel or employment records for one year, and for one year from the date of termination in involuntary termination cases.
A workers’ comp file and an OSHA injury record are not always the same thing, but they often overlap. OSHA generally requires covered employers to keep the OSHA 300 Log, privacy case list, annual summary, and OSHA 301 Incident Report for five years following the end of the calendar year that the records cover.
That OSHA rule is separate from your state workers’ compensation retention obligations. In other words, meeting OSHA’s five-year requirement does not automatically mean you have satisfied all workers’ comp retention rules. Employers should treat OSHA compliance and workers’ compensation record retention as related, but distinct, obligations.
Injured employees may need time away from work, light-duty assignments, schedule changes, or other accommodations. That is why workers’ compensation issues often connect with the Family and Medical Leave Act and the Americans with Disabilities Act.
Covered employers under the FMLA must keep the required records for at least three years. EEOC recordkeeping rules also require employers to retain personnel and employment records for set periods, depending on the employer type and the employment action involved. That means a workers’ compensation retention policy should not be built in isolation. It should be coordinated with your broader HR record retention framework.
Some employers search for how long to keep workers comp records and expect a simple number, but not every state provides a single easy-to-find rule for every type of workers’ compensation document. When state law is unclear, the best approach is to create a written retention policy that accounts for the longest reasonable compliance and risk-management window.
That policy should consider whether a claim could be reopened, whether future medical treatment may be involved, whether OSHA medical or exposure record rules apply, and whether related HR records must be kept longer under federal law. A cautious retention policy is often better than disposing of records too early and later discovering they were needed for a dispute, audit, or legal review.
Employers should keep workers’ compensation files organized, secure, and separate from general personnel files when appropriate. Medical documentation and sensitive claim information should be stored carefully and only accessed by those with a business need to know.
It is also wise to create a written schedule for record retention and destruction. That schedule should define what documents are kept, how long they are retained, where they are stored, and who is responsible for maintaining them. Businesses that operate in more than one state should review state-specific workers’ compensation requirements regularly to avoid relying on outdated assumptions. Because laws and agency guidance can change, retention practices should be reviewed periodically with your insurance advisor, HR team, or legal counsel.
The answer depends on your state and the type of documents involved. Employers should keep workers’ compensation records for at least the minimum period required by state law and longer when OSHA, medical record rules, open claims, or litigation risk justify extended retention.
Even if the claim is closed, you may still need to keep the file for years. State law, future medical rights, reopening rules, and federal recordkeeping requirements may all extend the appropriate retention period. A closed claim should not automatically be destroyed.
OSHA generally requires certain injury and illness recordkeeping forms, including the OSHA 300 Log and OSHA 301 Incident Report, to be kept for five years after the end of the calendar year covered by the records. That requirement applies to OSHA records and does not necessarily replace state workers’ compensation retention rules.
They can be. OSHA rules on employee exposure and medical records can require much longer retention periods than standard injury logs or basic claim documents. In some cases, exposure records must be kept for at least 30 years, and certain medical records must be kept for the duration of employment plus 30 years.
Understanding workers’ compensation records retention by the state is an important step in protecting your business. The right retention policy can help you respond to claims, audits, disputes, and compliance questions with confidence. Instead of relying on a generic rule, employers should build a policy that reflects their state requirements, OSHA obligations, medical record rules, and related HR laws.
If you are also reviewing your broader workers’ compensation strategy, explore Assured Standard’s guide to the best companies offering workers compensation to compare providers and learn more about choosing the right coverage for your business.
