Pre-disability earnings are the income baseline a long-term disability insurer uses to calculate your monthly benefit. The carrier averages your covered compensation over a defined window before your disability began, then multiplies that average by the replacement percentage written into your policy, usually between 50% and 66%. Every dollar the insurer leaves out of that average permanently shrinks the check, which is why this number is the single most consequential figure in a disability claim.
What Income Counts
Your policy’s definition of “earnings” or “covered compensation” controls which pay streams feed the calculation. Base salary or hourly wages form the core for most claimants. Beyond that, it depends on the plan language. Commissions, performance bonuses, overtime pay, and shift differentials are commonly included when you earned them regularly and they appear on your tax documents. A sales draw against future commissions is generally treated as current income for the period you received it.
Common exclusions are stock options, restricted stock units, employer retirement contributions, and reimbursements for business expenses. Employer-sponsored disability plans are almost always governed by the Employee Retirement Income Security Act, which requires the plan to issue a summary plan description spelling out how covered earnings are defined and what circumstances can reduce or eliminate benefits.1Office of the Law Revision Counsel. 29 USC 1022 – Summary Plan Description The answers are in your plan documents, not in a generic FAQ. Look for the section labeled “Definition of Earnings” or “Covered Compensation.” If a meaningful share of your pay is variable, read that section carefully before you file.
The Look-Back Period
Insurers don’t just look at last month. They average your income across a defined window, typically the 12 or 24 months immediately before your disability began. Averaging smooths out the peaks and valleys that come with seasonal work, commission cycles, or irregular overtime, and it prevents one bad quarter from dragging down your benefit for years.
If you’ve been on the job less than a year, most carriers average your monthly earnings from your start date through your last day worked. For very short tenures, the insurer may fall back on your contracted annual salary divided by twelve. The goal is to capture your actual earning capacity at the moment the disability hit, not a figure distorted by an artificially short or long snapshot.
Documents You Need to Verify Income
The burden of proving your earnings falls on you. Clean records shorten the claim, and discrepancies between documents are the most common cause of delay.
- W-2 forms. The previous two tax years give a broad picture of taxable wages and total compensation.
- Year-to-date pay stubs. These show the granular detail that W-2s collapse into one number, including overtime, shift differentials, and bonuses broken out by pay period.
- Employer payroll report. Request this from HR. It confirms what the employer’s own records show and surfaces any gap between your stubs and the company’s system.
- Tax return transcripts. If you’re self-employed or earn substantial commission income, request a tax return transcript from the IRS using Form 4506-T. That form produces a transcript summarizing the data from your return, not a photocopy; for an actual copy of the filed return, use Form 4506 instead. A wage and income transcript, also available through Form 4506-T, shows income reported to the IRS by third parties like employers and financial institutions.2Internal Revenue Service. About Form 4506, Request for Copy of Tax Return3Internal Revenue Service. Transcript Types for Individuals and Ways to Order Them
Compare your pay stubs against your W-2 before you submit anything. Mismatches are common when bonuses or deferred compensation land in unusual pay periods, and sorting them out before you file saves weeks of back-and-forth with the claims examiner.
How the Earnings Figure Becomes a Monthly Benefit
Once the insurer locks in your pre-disability earnings, it applies the plan’s replacement percentage. A plan replacing 60% of pre-disability income, applied to average monthly earnings of $6,000, produces a gross monthly benefit of $3,600. The percentage is fixed in the policy and does not change during your claim.
Most plans also impose a maximum monthly benefit cap, often between $5,000 and $15,000. The cap bites for higher earners whose percentage-based benefit would otherwise exceed it. If your 60% benefit calculates to $9,000 but the plan caps at $6,000, you get $6,000. This is one of the most overlooked provisions in disability coverage, and it is worth checking before you ever need to file a claim.
After the carrier finalizes your benefit, you’ll receive an Explanation of Benefits document breaking down how it arrived at the dollar amount. The statement lists the gross benefit, any offsets applied, and other deductions. Keep this document. It is the roadmap for understanding your monthly payment and the starting point for any dispute.
What Can Reduce the Gross Benefit
The gross benefit is rarely the amount deposited in your account. Nearly every group disability policy includes offset provisions that reduce your benefit dollar-for-dollar when you receive income from other sources:
- Social Security Disability Insurance. If you’re approved for SSDI, the insurer subtracts that amount from your monthly benefit. Many policies also offset family benefits paid to your dependents based on your SSDI claim. Insurers routinely require claimants to apply for SSDI and will reduce benefits by an estimated SSDI amount if you refuse.
- Workers’ compensation. If the disability arose from a work-related injury or illness, workers’ compensation payments typically offset the benefit. Social Security itself caps the combined total of SSDI and workers’ compensation at 80% of your pre-disability average current earnings.4Social Security Administration. How Workers’ Compensation and Other Disability Payments May Affect Your Benefits
- State disability benefits. A handful of states operate mandatory short-term disability programs, and those payments are typically offset against private coverage.
- Retirement or pension income. Some policies offset employer-funded retirement benefits if you begin receiving them while on claim.
One boundary worth knowing: most group plans don’t include a cost-of-living adjustment. Without a COLA rider, the benefit tied to your pre-disability earnings stays flat for the life of the claim, even if that claim runs ten or twenty years. COLA riders exist, often at a fixed percentage near 3% or tracking the Consumer Price Index, but they are far more common in individual policies than in employer group plans.
Taxes on What You Receive
Whether the benefit is taxable depends on who paid the premium and with what kind of dollars. If your employer paid the full premium, the benefit is fully taxable as ordinary income. If you paid the full premium with after-tax dollars, the benefit is tax-free. When both you and your employer contribute, the taxable portion matches the employer’s share of the premium cost over the three policy years before the year benefits begin.5Internal Revenue Service. Publication 15-A (2026), Employer’s Supplemental Tax Guide One wrinkle catches people off guard: if your premiums were paid through a pre-tax cafeteria plan under Section 125, the IRS treats them as employer-paid even though the money came from your wages, which makes the benefit fully taxable.
Disputing the Earnings Calculation
If the insurer’s earnings number doesn’t match your records, ERISA gives you a structured path to challenge it. The insurer must tell you the specific reasons for its benefit determination, identify the plan provisions it relied on, and explain what additional information would support a different result.6Office of the Law Revision Counsel. 29 USC 1133 – Claims Procedure For disability claims specifically, it must also disclose the internal guidelines or criteria it used, or state that none exist.7eCFR. 29 CFR 2560.503-1 – Claims Procedure
The initial claim decision must come within 45 days, though the insurer can extend that twice in 30-day increments if it explains why.7eCFR. 29 CFR 2560.503-1 – Claims Procedure If you disagree with the result, you have at least 180 days to file a formal internal appeal, and the person reviewing it cannot be the one who made the original decision or anyone who reports to that person.8U.S. Department of Labor. Benefit Claims Procedure Regulation FAQs
You are entitled, free of charge, to copies of every document the insurer relied on, every document generated during the review, and any internal policy guidelines related to your claim.8U.S. Department of Labor. Benefit Claims Procedure Regulation FAQs Request them immediately. Seeing the actual payroll data and calculation worksheets the insurer used is the fastest way to find where your numbers diverge from theirs. The errors that most often turn up are omitted overtime or commissions, the wrong averaging window, and miscalculated partial months of employment.