Social Security isn't just for retirees; it's also designed to help people with disabilities stay afloat financially. Last year, almost 9 million Americans received Social Security disability benefits. But as useful as those benefits might be, they're often not enough to help recipients cover their living costs in full. If you're receiving Social Security disability benefits, there's good news in this regard: You can work and continue to collect your monthly Social Security payments as long as you meet certain criteria. IMAGE SOURCE: PIXABAY. To be considered eligible for Social Security disability benefits, you cannot engage in what's known as substantial gainful activity (SGA). The Social Security Administration defines "substantial" as earning more than a certain amount each month. For 2016, you can work and collect your disability benefits as long as your earnings don't exceed $1,130 per month, or $1,820 if you're blind. However, there are also exceptions to this rule. Trial work periodSometimes it's hard to know whether you'll be able to return to work following a disability. Thankfully, the Social Security Administration allows you to test the waters without compromising your disability benefits. During what's known as your trial work period, you can test your ability to work for nine months, during which you'll receive your disability benefits in full, regardless of how much you make. For 2016, any month where you earn over $810 is considered a trial work month. If you're self-employed, any month where you work more than 80 hours is also considered a trial work month. Your trial period will continue until you've worked nine months within a 60-month timeframe. Extended period of eligibility Once your trial work period is over, you can still receive disability benefits for any month in which your earnings fall below the SGA threshold. This extended period of eligibility lasts 36 months and offers additional protection in the event that you're unable to work consistently as a result of your condition. Furthermore, if your Social Security disability payments do stop because your income exceeds the SGA limit, you still have five years to get those benefits reinstated. Offsetting your earnings with expenses Earning more than $1,130 per month, or $1,820 per month if you're blind, can make you ineligible for disability benefits. However, the Social Security Administration will deduct certain disability-related expenses that allow you to work from your income to lower your earnings on paper. If, for example, you're unable to take public transportation to work because of your disability and must pay for taxis or car service instead, deducting that cost from your earnings could be enough to push you below the SGA threshold, which would help you hold on to your disability benefits while employed. Let's say, for instance, that you earn $2,000 per month but have $900 in deductible expenses. That $900 will effectively reduce your income to $1,100, leaving you eligible for Social Security disability benefits. Remember, the Social Security Administration actually encourages those receiving disability benefits to pursue work opportunities, and has special programs in place to help make that happen. And working while collecting benefits could wind up being just as good for your health as it is for your bank account. The $15,834 Social Security bonus most retirees completely overlook If you're like most Americans, you're a few years (or more) behind on your retirement savings. But a handful of little-known "Social Security secrets" could help ensure a boost in your retirement income. For example: one easy trick could pay you as much as $15,834 more... each year! Once you learn how to maximize your Social Security benefits, we think you could retire confidently with the peace of mind we're all after. Simply click here to discover how to learn more about these strategies.