Millions of Americans receiving Medicare coverage may notice an unexpected $90 deposit in their bank accounts this October, but not everyone enrolled in the federal health insurance program qualifies. The Centers for Medicare & Medicaid Services (CMS) announced that approximately 20.8 million Medicare beneficiaries are eligible for a one-time $90 payment intended to help offset Medicare Part B premiums. Most qualifying recipients are expected to receive the money through direct deposit around October 8, while others will receive paper checks later in the month. However, eligibility depends on the type of Medicare coverage someone has, whether they receive help paying premiums, and whether their income triggers additional Medicare charges. Before assuming you’re getting the $90 Medicare rebate, here’s what you need to know about who qualifies, when the money arrives, and what it means for your retirement budget.