SSDI Award & Work Credit Planner

How this SSDI planner works (and what it can and can’t do)

This page is a planning tool for Social Security Disability Insurance (SSDI). It estimates a monthly benefit amount using the same high-level structure as the Social Security Administration (SSA): you start with earnings, convert them into an Average Indexed Monthly Earnings (AIME), apply the Primary Insurance Amount (PIA) bend-point formula, then consider a simplified family maximum range and optional offsets.

The calculator is designed for scenario testing: “If my onset year is different, how do bend points change?” “If I have a workers’ compensation offset, what might my net SSDI look like?” “Am I close to using all nine Trial Work Period months?” It is not a legal determination and it does not replace your SSA earnings record or an official award notice.

What you can enter

• Earnings history (year,wages): one year per line, like 2023,63000. If provided, the calculator uses the highest 35 wage entries (by wages) and divides by 420 months.
• Average annual wage estimate and Years of earnings: a shortcut when you don’t have year-by-year wages. The tool uses up to 35 years for the AIME divisor.
• Expected disability onset date: used to select the bend points and Trial Work Period threshold for that year (or the latest year available in the tool’s constants).
• Workers’ compensation offset: subtracted from the estimated monthly SSDI benefit in this simplified model.
• Eligible dependents: used to estimate a family maximum range (simplified).
• Trial Work Period months used: used only for the warning message and planning context.

Core formulas used on this page

The calculator uses simplified versions of the standard SSDI building blocks. In plain language:

• AIME (simplified): Sum of up to 35 years of wages ÷ 420 months.
  
  Note: SSA indexing and dropout rules are complex. This tool uses a simplified approach for planning.
• PIA (bend points): 90% of AIME up to the first bend point + 32% of the next slice + 15% above the second bend point.
• Offsets (simplified): Estimated net SSDI = max(0, PIA − workers’ compensation offset).

Worked example (quick sanity check)

Suppose your onset date is in 2024, you enter an average annual wage of $55,000, and you estimate 15 years of earnings. The calculator will:

1. Compute a simplified AIME: $55,000 × 15 ÷ 420 ≈ $1,964.29.
2. Apply 2024 bend points (as included in this page’s constants) to estimate PIA.
3. Subtract any workers’ compensation offset you entered (if any).

If your result looks wildly off, the most common causes are (a) entering monthly wages as annual wages, (b) mixing years and wages on a line, or (c) leaving the onset date blank.

Assumptions and limitations (important)

• Indexing: SSA uses wage indexing factors and specific computation years. This tool uses a simplified earnings approach for planning.
• Quarters of coverage: this page estimates quarters as 4 per year based on the number of entries or years worked; it does not use SSA’s annual QC dollar thresholds.
• Family maximum: estimated as a range using a simplified method; real auxiliary benefit allocation can differ.
• Offsets: real workers’ compensation/public disability offsets can depend on “average current earnings” and other rules; this tool uses a direct subtraction for clarity.
• Policy updates: bend points and thresholds change annually. If your onset year is not listed, the tool uses the latest year available in its constants.

For official figures, compare your inputs and outputs with your my Social Security statement and SSA publications. Use this calculator to understand directionally how changes in earnings, onset year, and offsets can affect an estimate.

Practical guidance: entering earnings history without surprises

The earnings history box accepts a simple two-column format: year, then wages, separated by a comma. Each line is treated as one year. The calculator trims spaces, ignores blank lines, and skips lines that don’t parse into a valid year and number. To keep your estimate stable, use whole-year totals (W-2 wages or net self-employment earnings that were subject to Social Security tax) rather than pay-period amounts.

If you paste data from a spreadsheet, make sure it doesn’t include currency symbols or extra commas (for example, 2023,$63,000 will not parse as intended). Use 2023,63000 instead. If you have more than 35 years of earnings, the calculator uses the highest 35 wage entries (sorted by wages) for its simplified AIME. That is not the same as SSA’s official indexing-and-selection process, but it is a reasonable planning shortcut when you want to understand the scale of benefits.

Understanding AIME vs. PIA vs. “what you receive”

These three terms are often mixed together, so it helps to separate them:

• AIME is a monthly average of earnings used for the benefit formula. In this tool it is a simplified average of wages over 420 months.
• PIA is the base benefit amount produced by the bend-point formula. It is the starting point for many other calculations.
• Estimated monthly SSDI after offsets is what this page shows as the headline number: PIA minus the workers’ compensation offset you enter, floored at zero.

In real SSA determinations, additional adjustments can apply (for example, rounding rules, entitlement month timing, and specific offset computations). Use this page to compare scenarios consistently, then confirm details with SSA publications or a qualified representative.

Scenario planning: three common “what if” questions

A calculator is most useful when you run more than one scenario. Here are three practical ways to use this planner:

1. Onset year sensitivity: change the onset date to see how bend points and the Trial Work Period threshold differ by year. Even if your earnings are unchanged, the year-specific constants can move the estimate.
2. Offset stress test: enter a workers’ compensation offset amount you think is plausible (or a range of amounts). Watch how quickly the net SSDI estimate declines. If the offset is large, the net benefit can approach zero in this simplified model.
3. Dependents planning: increase or decrease the dependents count to see how the family maximum range changes. This can help you anticipate whether auxiliary benefits might be constrained by a maximum.

Data privacy and sharing results

When you click Copy result link, the page builds a URL that includes your current form values as query parameters. That makes it easy to share a scenario with a spouse, advocate, or planner, but it also means the link may contain sensitive information (like earnings). Share it only with people you trust.

The page also stores your last-used inputs in your browser’s local storage under the current path so you can return later without retyping. Use the Reset button to clear stored values and remove query parameters from the address bar.

Frequently overlooked details (quick checklist)

• Annual vs. monthly: the earnings history and average wage fields are annual amounts; the workers’ compensation offset is treated as monthly in this simplified model.
• Zeros are meaningful: leaving the earnings history blank triggers the average wage method; entering 0 wages for a year will lower the simplified average.
• Trial Work Period months: the months-used field is for planning and warnings; it does not change the PIA calculation.
• Coverage warning: the quarters estimate here is a rough proxy; SSA insured status depends on your age and recent work tests.
• Rounding: PIA is rounded down to the nearest dime in the script, which can create small differences from hand calculations.

If you want a clean baseline, start by leaving the earnings history box empty and using the average wage method. Once you understand the scale of the estimate, paste in year-by-year wages to see how the result changes.