SSDI Trial Work Period: South Dakota Guide

Returning to work while receiving Social Security Disability Insurance benefits is one of the most consequential decisions a disabled South Dakotan can make. The Social Security Administration (SSA) built the Trial Work Period (TWP) specifically to reduce the financial risk of attempting employment — but the rules are technical, and a single misstep can trigger overpayments or premature benefit termination. Understanding exactly how the TWP operates protects your income while you test your capacity to work.

What the Trial Work Period Actually Is

The Trial Work Period is a nine-month window during which you can earn wages — at any level — without the SSA reducing or suspending your monthly SSDI payment. Congress created it to remove the "benefits cliff" that discouraged disabled workers from even attempting employment. During your TWP, the SSA continues paying full benefits regardless of how much you earn, provided you remain medically disabled.

The nine months do not need to be consecutive. The SSA counts them within a rolling 60-month period. Once you accumulate nine TWP months within any five-year window, the trial work period ends. At that point, the rules shift significantly.

A month qualifies as a TWP month when your gross earnings exceed the SSA's monthly threshold. For 2025, that threshold was $1,160 per month. This figure adjusts annually with cost-of-living increases, so South Dakota recipients should verify the current threshold directly with their local SSA field office or at SSA.gov before each calendar year. If you are self-employed, the SSA may also count a month in which you work more than 80 hours, regardless of net income.

How the Trial Work Period Affects South Dakota Recipients

South Dakota does not administer SSDI — it is a federal program managed entirely by the SSA — so state law has no direct bearing on TWP rules. However, South Dakota's economy and labor market create some practical considerations worth noting.

Many South Dakotans with disabilities explore part-time work in agriculture, tourism, retail, and healthcare support roles. Seasonal and gig-based income can be irregular, which makes tracking TWP months more complicated. A summer construction season that pushes monthly wages above the threshold counts as a TWP month even if winter months produce no income at all. Keep detailed monthly earnings records and report all work activity to the SSA promptly — failure to report earnings is the most common source of costly overpayments.

South Dakota also participates in the federal Ticket to Work program, administered locally through Vocational Rehabilitation and other Employment Networks. Assigning your Ticket to Work to an approved provider does not stop your TWP from running, but it does trigger additional protections and may pause SSA-initiated Continuing Disability Reviews while you are making timely progress toward employment goals.

What Happens When the Trial Work Period Ends

After exhausting all nine TWP months, your case enters the Extended Period of Eligibility (EPE), a 36-month window during which the SSA evaluates your earnings against Substantial Gainful Activity (SGA). For 2025, the SGA threshold was $1,620 per month for non-blind recipients. This amount also adjusts annually.

During the EPE, the SSA applies the following rules:

• Any month your earnings fall below SGA, you receive your full SSDI payment.
• Any month your earnings are at or above SGA, the SSA considers you engaged in substantial gainful activity and may suspend benefits for that month.
• If your condition worsens and earnings drop below SGA again during the EPE, benefits restart automatically without filing a new application.
• After the 36-month EPE ends, earning at or above SGA terminates your SSDI entitlement — at that point, reinstatement requires a new application or an Expedited Reinstatement request within five years.

The transition from TWP to EPE catches many recipients off guard. Benefits do not end the moment the ninth TWP month is used; there is a grace period consisting of the first month above SGA after the TWP plus two additional months. During those three grace period months, you receive full benefits even if earnings exceed SGA. After the grace period, the SGA test applies retroactively for each month of the EPE.

Work Incentives That Work Alongside the Trial Work Period

The TWP is not the only work incentive available to South Dakota SSDI recipients. Several others can extend your financial runway:

• Impairment-Related Work Expenses (IRWE): Out-of-pocket costs directly related to your disability — such as prescription medications, specialized equipment, or modified transportation — can be deducted from gross earnings before the SSA applies the SGA calculation. This effectively raises the income ceiling for disabled workers with significant medical costs.
• Subsidy and Special Conditions: If your employer provides extraordinary support or accommodations beyond what a non-disabled coworker would receive, the SSA may count only the "real value" of your work rather than actual wages.
• Unsuccessful Work Attempt (UWA): If you attempt work but stop within six months due to your disabling condition, the SSA may exclude those months from the SGA analysis altogether.
• Expedited Reinstatement: If your benefits terminate after the EPE and your condition deteriorates, you can request reinstatement within five years of termination without filing a full new application — and receive up to six provisional benefit months while the SSA reviews your case.

Practical Steps for South Dakota Workers Entering the Trial Work Period

Before accepting employment or increasing hours, take these concrete steps to protect your benefits:

• Notify the SSA in writing before or as soon as you begin working. Use certified mail and keep a copy. Verbal reports alone are insufficient documentation.
• Request a current count of your used TWP months from the SSA. Many recipients are surprised to learn months from part-time or seasonal work years earlier already count against their nine-month total.
• Contact South Dakota Vocational Rehabilitation at 605-773-3195 or a local Benefits Counselor through the Ticket to Work program. A certified Work Incentive Practitioner can model your specific earnings scenarios before you accept a job offer.
• Document all disability-related work expenses from day one, even if you are unsure whether they qualify as IRWEs. Retroactive documentation is difficult and incomplete records reduce your deductions.
• Continue seeing your treating physicians and maintaining medical documentation throughout the TWP. The SSA can initiate a Continuing Disability Review at any time, and uninterrupted medical records are your primary defense.

The Trial Work Period is a valuable protection, but it is also a countdown. South Dakotans who approach it strategically — with professional guidance and detailed recordkeeping — are far better positioned to transition to sustainable employment or, if work proves impossible, to retain their benefits without disruption.

Need Help? If you have questions about your case, call or text 833-657-4812 for a free consultation with an experienced attorney.

Related Articles

• SSDI Benefit Calculator: New Hampshire Guide
• How to Appeal an SSDI Denial in Washington
• How to Apply for SSDI Benefits in Nevada