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How to Calculate Ppd in Illinois

How to Calculate PPD in Illinois

Permanent Partial Disability (PPD) benefits are an essential aspect of workers’ compensation claims in Illinois. These benefits are offered to workers who have suffered a permanent injury or impairment as a result of a work-related accident. Calculating the PPD amount involves several factors, and understanding the process is crucial for both employees and employers. In this article, we will delve into the details of how to calculate PPD in Illinois, providing an overview of the key steps and factors involved.

Step 1: Determine the Nature of the Injury

The first step in calculating PPD benefits is to determine the nature of the injury. Illinois law categorizes injuries into three types: scheduled injuries, non-scheduled injuries, and disfigurement.

Scheduled Injuries: These are injuries that affect specific body parts listed in the Illinois Workers’ Compensation Act. Examples include the loss of a hand, foot, or eye. The Act assigns a specific number of weeks of compensation for each body part.

Non-Scheduled Injuries: These are injuries that involve body parts not listed in the Act, such as the back or neck. The compensation for non-scheduled injuries is determined based on the level of impairment as assessed by a medical professional.

Disfigurement: Disfigurement refers to visible scars or marks resulting from an injury. Compensation for disfigurement is determined based on the severity and location of the disfigurement.

Step 2: Determine the Level of Impairment

For non-scheduled injuries, the level of impairment is assessed by a medical professional using the American Medical Association’s Guides to the Evaluation of Permanent Impairment. This guide provides a comprehensive framework for evaluating the extent of impairment and assigning an impairment rating.

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The impairment rating is expressed as a percentage, indicating the level of permanent loss of function or impairment. For instance, if a worker is assessed with a 10% impairment rating for a back injury, it means they have permanently lost 10% of the normal function of their back.

Step 3: Calculate PPD Benefits

Once the nature of the injury and the level of impairment are determined, the PPD benefits can be calculated. In Illinois, the calculation is based on the worker’s average weekly wage, the body part affected, and the impairment rating.

For scheduled injuries, the Act assigns a specific number of weeks of compensation for each body part. The compensation rate is calculated by multiplying two-thirds (66.67%) of the average weekly wage by the number of weeks assigned to the body part.

For non-scheduled injuries, the compensation is determined by multiplying the impairment rating by a specific number of weeks based on the worker’s age and occupation. This number of weeks is then multiplied by the worker’s average weekly wage to calculate the PPD benefits.


Q: How long do I have to file a PPD claim in Illinois?
A: In Illinois, the statute of limitations for filing a PPD claim is three years from the date of the injury or two years from the last compensation payment, whichever is later. It is crucial to file the claim within this timeframe to ensure eligibility for benefits.

Q: Can I receive PPD benefits if I can still work?
A: Yes, you can receive PPD benefits even if you are still able to work. PPD benefits compensate for permanent impairment or loss of function, not the ability to work. The benefits are calculated based on the level of impairment, regardless of whether you can continue working or not.

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Q: Can PPD benefits be negotiated or settled?
A: Yes, PPD benefits can be negotiated or settled. Parties involved in a workers’ compensation claim can enter into settlement agreements to resolve the PPD benefits. However, it is advisable to consult with an attorney experienced in workers’ compensation law to ensure a fair settlement.

Q: Are PPD benefits subject to taxes?
A: No, PPD benefits in Illinois are not subject to state or federal income taxes. These benefits are considered compensation for a personal injury and are therefore exempt from taxation.


Calculating PPD benefits in Illinois involves determining the nature of the injury, assessing the level of impairment, and calculating the compensation based on the average weekly wage and other factors. It is important to understand the process and consult with legal professionals specialized in workers’ compensation law to ensure fair and accurate calculations.

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