Those that receive Social Security benefits in addition to Supplemental Security Income will get three payments in May. Here's why.

Supplemental Security Income payments are given to people living with debilitating disabilities that affect their income, according to the Social Security Administration.

Social Security checks in May might surprise some recipients with two or even three payments landing in their accounts. But don’t worry—it’s not a mistake. It’s all due to how the Social Security Administration (SSA) schedules SSI and Social Security benefits.