What an SGA calculator does and why you need one
An SGA calculator is a tool that shows you whether your current or projected monthly earnings fall below the dollar amount Social Security uses to decide if you are working at a substantial level. For 2024, that threshold is $1,550 per month for non-blind beneficiaries and $2,590 for blind beneficiaries. If you earn less than your threshold, Social Security counts you as not working at a substantial level — meaning you keep your SSDI check even while working.
The calculator does one thing: it takes your gross monthly income and compares it to the current SGA limit. That comparison matters because it determines whether your work triggers a work deduction, a trial work period, or a return to work review. You do not need a calculator to understand the rule itself, but you do need one to know where your actual earnings land.
Social Security publishes the SGA amounts each year in November, effective January 1 of the following year. The amounts change because they are tied to the national average wage index. If you are planning to work or already working, checking your earnings against the current threshold takes minutes and removes guesswork.
Key Takeaways
- The 2024 SGA threshold is $1,550 per month for non-blind workers and $2,590 for blind workers; these amounts change each January.
- An SGA calculator compares your gross monthly earnings to the threshold and tells you whether you are below or above the limit.
- Earning below SGA does not stop your SSDI payments, but earning above it triggers a work deduction or review of your case.
- You can calculate SGA yourself by dividing your monthly gross income by the current threshold, or use Social Security's online tool.
- Part-time work, self-employment income, and irregular pay all count toward SGA, so you must include all sources of earnings.
How to find the current SGA amount for your situation
Social Security maintains a single SGA threshold for most beneficiaries and a separate, higher threshold for those who are blind. The non-blind threshold applies to you if you are receiving SSDI based on a disability other than blindness. The blind threshold applies only if your primary impairment is blindness or severe vision loss meeting Social Security's definition.
The official SGA amounts are published on Social Security's website each November. You can find them by searching "substantial gainful activity" on ssa.gov, or by calling Social Security at 1-800-772-1213 to confirm which threshold applies to you. Do not rely on amounts from previous years — the threshold changes annually, and using an outdated number could lead you to misunderstand your work situation.
If you are unsure whether your vision loss qualifies you for the blind threshold, ask Social Security directly. The definition is narrow: you must have central visual acuity of 20/200 or less in your better eye with correction, or a visual field of 20 degrees or less. Most people with partial vision loss use the non-blind threshold.
Calculating your monthly earnings against SGA
To calculate whether you are below SGA, you need to know your gross monthly income — that is, your earnings before taxes, deductions, or other withholdings. Gross income includes wages from an employer, net profit from self-employment, and any other earned income. It does not include benefits, interest, dividends, or rental income.
If you are paid by the hour, multiply your hourly rate by the number of hours you expect to work in a month, then compare that to the SGA threshold. If you are salaried, divide your annual salary by 12. If your income varies month to month, calculate an average over the past three months or project forward based on your contract or expected hours.
For self-employment, use your net profit — total revenue minus ordinary business expenses — divided by 12 months. Social Security does not count business expenses dollar-for-dollar the way the IRS does; they have their own rules for what counts as a legitimate deduction. If you are self-employed, ask Social Security's work incentives specialist to review your calculation before you rely on it.
| Situation | How to Calculate |
|---|---|
| Hourly wage | Hourly rate × expected hours per month |
| Salaried position | Annual salary ÷ 12 |
| Variable monthly income | Average of last three months of gross pay |
| Self-employment | Annual net profit ÷ 12 (using Social Security's expense rules) |
What happens if your earnings are above SGA
If your monthly earnings exceed the SGA threshold, Social Security does not automatically stop your SSDI check. Instead, your case enters a work deduction phase or a review process, depending on whether you are in your trial work period or past it.
During your trial work period — nine months in a rolling 60-month window — you can earn any amount without losing benefits. After the trial work period ends, if your earnings stay above SGA, Social Security will conduct a medical review to determine whether your condition has improved enough to end your may be able to access. This review can take several months.
If you are past your trial work period and earning above SGA, you may also face a work deduction: Social Security subtracts $1 from your benefit for every $2 you earn above the threshold. This reduction continues until your benefits stop entirely, at which point you enter an extended may be able to access period where you can work without a benefit check but remain insured.
Using Social Security's online SGA tool
Social Security does not publish a single calculator tool on its main website, but the agency does provide worksheets and information pages that walk you through the calculation. You can find these by visiting ssa.gov and searching for "SGA calculator" or "work incentives calculator."
Some state vocational rehabilitation agencies and work incentives planning and information (WIPA) projects offer online calculators that estimate your SGA status. These are free and do not require you to create an account. Search "[your state] WIPA SGA calculator" to find one in your area.
If you cannot find an online tool or prefer to speak with someone, contact your local Social Security office or call 1-800-772-1213. A work incentives specialist can review your earnings and tell you exactly where you stand relative to SGA. This conversation is free and does not trigger any review of your case.
Common mistakes when calculating SGA
The most common error is using net income instead of gross income. Social Security counts your earnings before taxes, health insurance premiums, or retirement contributions are taken out. If you earned $2,000 gross but took home $1,600 after taxes, Social Security counts $2,000 toward SGA.
Another mistake is forgetting to include all sources of earned income. If you have a part-time job and also do freelance work, you must add both together. If you receive a bonus or commission, include it in the month you receive it. Social Security looks at total earned income, not just your primary job.
A third error is using an outdated SGA threshold. The amount changes every January. If you calculated your status in March using the previous year's threshold, recalculate in January using the new amount. Relying on old numbers can lead you to misunderstand whether you are above or below the limit.
When to recalculate and report changes
Recalculate your SGA status whenever your earnings change significantly — when you start a new job, get a raise, reduce your hours, or take on additional work. You do not need to report every small fluctuation, but you should report changes that move you above or below the threshold.
Social Security requires you to report work activity and earnings changes. You can report online through your my Social Security account, by phone at 1-800-772-1213, or in person at your local office. Reporting does not automatically trigger a review; it straightforward keeps your file accurate and prevents overpayments.
If you are unsure whether a change requires reporting, report it anyway. Over-reporting is harmless; under-reporting can result in an overpayment that Social Security will ask you to repay later. The safest approach is to contact Social Security whenever your work situation changes.
Frequently Asked Questions
Does earning below SGA mean I keep my full SSDI check?
Yes. If your monthly gross earnings are below the SGA threshold, Social Security counts you as not working at a substantial level, and you receive your full SSDI payment. This is true even if you are working 30 or 40 hours per week — what matters is the dollar amount, not the hours.
What if my income varies month to month?
Social Security looks at your average earnings over time, not a single month. If you have a high-earning month followed by a low-earning month, calculate your average over the past three months and compare that to SGA. Irregular income is common in seasonal work and self-employment, and Social Security accounts for it.
Do I count tips, bonuses, or commission as earned income?
Yes. All earned income counts toward SGA, including tips, bonuses, commissions, and irregular pay. Include these in the month you receive them. If you receive a large bonus in one month, that month's earnings may exceed SGA even if your typical monthly income does not.
What if I am self-employed — how do I calculate my earnings?
Use your net profit (revenue minus ordinary business expenses) divided by 12 months. Social Security has specific rules about which expenses count, and they differ from IRS rules. Before relying on your calculation, contact a work incentives specialist who can review your business expenses and confirm your SGA status.
Can I use last year's SGA amount if I have not seen the new one yet?
No. Always use the current year's threshold, which takes effect January 1. If the new amount has not been published yet, check ssa.gov in early November or call Social Security to confirm the upcoming threshold. Using an outdated amount could lead you to misunderstand your work situation.