Knee Injuries in Workers' Comp
Knee injuries are the second most common disabling workplace injury after back injuries. They are especially prevalent in construction, warehousing, healthcare, and any job that involves kneeling, squatting, heavy lifting, or prolonged standing on hard surfaces. A knee injury that requires surgery is also a significant workers' comp claim — one that carriers routinely try to reduce through pre-existing condition arguments and low impairment ratings. This calculator estimates your claim value based on your state's scheduled weeks for the leg, your impairment rating, and your average weekly wage. The numbers below explain what drives that estimate.
How Knee Injury Claims Are Valued
Knee claims in workers' comp are scheduled against the leg in most states. Most state leg schedules run 200 to 300 weeks at full impairment. Your impairment rating — assigned by a physician at MMI — is multiplied against those scheduled weeks and your weekly benefit rate to produce your PPD award. A 15% leg impairment rating in a state with a 288-week leg schedule at a $900 weekly rate produces a PPD face value of $38,880. A 30% rating at the same wage and schedule produces $77,760. Surgery pushes ratings higher. A total knee replacement at 35% impairment in the same scenario produces $90,720 in PPD face value before settlement discounts. Your TTD benefit runs from the date you miss work through the date you return or reach MMI. Knee surgery extends that period significantly.
Knee Scheduled Weeks by Major State
State leg schedules vary more than most injured workers realize. California does not use a simple leg schedule — it applies a whole-person formula that often produces different values than a straight scheduled-loss approach. Texas schedules the leg at 200 weeks. Florida uses 230 weeks. New York uses 288 weeks. New Jersey uses 315 weeks. The difference between a 200-week and a 300-week leg schedule at a $700 weekly rate and a 20% impairment rating is $14,000. Confirming your state's actual schedule — not a national average — is essential to understanding your real claim value. The calculator above uses your state's current 2026 rates.
Meniscus vs. ACL vs. Total Replacement
Not all knee surgeries produce the same impairment rating or settlement value. A meniscectomy (partial or complete surgical removal of the meniscus) typically produces a permanent impairment rating of 5 to 12% to the lower extremity. With conservative physical therapy only, a meniscus tear may produce 3 to 8%. These are the lower end of knee claim values. An ACL reconstruction typically produces 10 to 18% lower extremity impairment. If the repair involves additional meniscus or cartilage damage — which is common — the rating increases. Revision ACL surgery (a second reconstruction after failure of the first) routinely produces ratings of 20% or higher. A total knee replacement (TKR) produces 25 to 40% lower extremity impairment in most states. This is the highest-value standard knee claim and typically involves permanent work restrictions that affect earning capacity as well.
Surgery and Rating Impact
Even a technically successful knee surgery produces a permanent impairment rating because of documented post-surgical loss of motion, strength reduction, or the presence of hardware. Do not assume a good surgical outcome means zero permanent impairment. Always insist on a formal impairment rating — in writing, from your treating orthopedic surgeon — before any settlement discussions begin. The carrier's IME physician will produce a competing rating that is almost always lower. Your treating physician's rating carries more weight before a workers' comp board if it is well-documented and based on objective measurements.
Returning to Work With Restrictions
Light-duty restrictions after knee surgery are common. No prolonged standing, no kneeling or squatting, no climbing ladders, and restrictions on weight-bearing are typical. If your employer offers modified work within those restrictions, you are generally required to accept it — TTD converts to TPD at the reduced wage rate. If your employer has no modified work available, you continue on TTD. If your restrictions are permanent and incompatible with your pre-injury job, you may qualify for vocational rehabilitation benefits. In states that calculate PPD on a wage-loss basis — Florida, New York, and others — permanent earning reduction can significantly increase your total benefit beyond the scheduled weeks alone.
Pre-Existing Arthritis and Apportionment
Knee arthritis is common, especially in workers over 40. Carriers routinely argue that your need for a meniscus repair or knee replacement was caused by pre-existing arthritis, not the work injury. In most states, if the work incident accelerated the progression of arthritis or produced a new acute injury on top of a degenerative joint, the work-related component is compensable. The key is medical documentation. A treating physician who can articulate — clearly, in writing — how the work event caused or accelerated the condition gives you a defensible position. Imaging taken shortly after the injury, compared to any prior imaging, is powerful evidence.
Cumulative Trauma Knee Injuries
Not all knee injuries happen in a single event. Workers whose jobs involve years of kneeling, heavy lifting, or operating vibrating equipment can develop knee conditions that qualify as occupational diseases or cumulative trauma injuries. These claims follow different notice rules than acute injuries — in most states, the statute of limitations begins when you knew or should have known the condition was work-related. See a doctor and report the connection to your employer as soon as you make that connection.
Workers' Comp Calculators by State
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Frequently asked questions
How much is a workers' comp settlement for a knee injury?+
A knee injury workers' comp settlement depends on your average weekly wage, your impairment rating, and your state's scheduled weeks for the leg. Most states schedule the leg at 200 to 300 weeks. A meniscectomy (meniscus surgery) typically produces a 5 to 12% impairment rating to the leg, producing roughly $7,000 to $25,000 in PPD value at a $1,000 AWW depending on state. An ACL repair typically produces 10 to 18%, worth $14,000 to $38,000. A total knee replacement produces 25 to 40% impairment, worth $35,000 to $80,000 in PPD face value at the same AWW. Attorney-represented claimants settle for 30 to 40% more on average.
Is a torn meniscus covered by workers' comp?+
Yes, a torn meniscus is covered by workers' comp if it occurred at work or was aggravated by work activity. Common causes include twisting the knee while lifting, a fall on a job site, or cumulative stress from kneeling or squatting in trades work. You must report the injury and seek treatment promptly. Delayed reporting gives carriers grounds to dispute whether the tear was work-related. Even if you have prior knee issues, a work-related aggravation of a pre-existing meniscus condition is compensable in most states.
What impairment rating does an ACL injury produce?+
An ACL tear repaired surgically typically produces a permanent impairment rating of 10 to 18% to the lower extremity under the AMA Guides, depending on residual instability, range of motion loss, and whether additional structures (meniscus, cartilage) were involved. Conservative management without surgery typically produces 5 to 10%. If the ACL repair requires revision surgery or results in chronic instability, ratings of 20% or higher are possible. An independent rating evaluation is recommended if the carrier's doctor assigns a rating below 10% for a repaired ACL with documented instability.
Does workers' comp pay for a knee replacement?+
Workers' comp must pay for a knee replacement if it is medically necessary and caused or accelerated by a work-related knee injury. Total knee replacements are authorized after conservative measures fail. The carrier may dispute whether your pre-existing arthritis, rather than the work injury, is the primary cause of the need for replacement. In most states, if the work injury significantly accelerated or aggravated the arthritic condition leading to replacement, workers' comp must cover it. A total knee replacement produces a permanent impairment rating of 25 to 40%, making it one of the higher-value knee claims.
Can I return to my old job after a knee injury?+
Whether you can return to your pre-injury job after a knee injury depends on the permanent work restrictions your doctor documents at MMI. Many knee injury claimants receive restrictions such as no prolonged standing, no kneeling or squatting, no climbing ladders, or a weight-bearing limit. If those restrictions are incompatible with your pre-injury job, your employer must offer modified duty or you may qualify for vocational rehabilitation benefits in your state. If no modified work is available, you may receive additional wage-loss benefits in states that calculate PPD on an earnings-loss basis.
How long is recovery from knee surgery under workers' comp?+
Recovery timelines under workers' comp track medical recovery. Meniscectomy recovery is typically 6 to 12 weeks before MMI is declared for mild cases, though TTD often ends sooner when light-duty work is available. ACL repair typically runs 6 to 12 months of recovery before MMI. Total knee replacement typically requires 9 to 18 months before final MMI is declared, especially in physical jobs. During the recovery period, the carrier must continue paying TTD and covering all authorized medical costs.
Should I hire an attorney for my knee injury workers' comp claim?+
Knee injury claims — especially those involving surgery — are frequently disputed on two fronts: pre-existing condition apportionment and impairment rating accuracy. Carriers routinely assign low impairment ratings and argue that pre-existing arthritis is the primary cause of disability. An attorney can obtain an independent rating evaluation, challenge low ratings, and negotiate a settlement that reflects the full value of your PPD award, future medical needs, and wage-loss exposure. Workers' comp attorneys work on contingency — you pay nothing unless they recover money for you.