SSDI's $1,620/month earnings cliff forces disabled workers to stay poor or lose everything

If a disabled worker on SSDI earns even one dollar over $1,620 per month in 2025 (the Substantial Gainful Activity threshold), they do not lose a proportional share of benefits — they lose all of them. This is not a gradual taper. It is a cliff. One extra freelance gig, one month of overtime, one raise that pushes gross pay past the line, and the entire monthly SSDI check — averaging $1,580 — vanishes. This matters because it traps 8.3 million SSDI beneficiaries in enforced poverty. A disabled software developer who could comfortably earn $3,000/month working part-time instead caps their effort at $1,600 to avoid the cliff, leaving $1,400/month of productive capacity on the table. Multiply that by millions of beneficiaries and you get billions of dollars in lost GDP and tax revenue — not because people cannot work, but because the benefit structure punishes them for working. The cliff also destroys healthcare access: losing SSDI eventually means losing Medicare, and for someone with a chronic condition requiring $2,000/month in medications, no private-market job at $2,500/month can replace what they lose. The reason this persists is structural. SSDI was designed in 1956 as a binary program — you are either disabled and cannot work, or you are not disabled. The concept of partial disability or graduated work capacity was never built into the statute. Congress has bolted on workarounds like the Trial Work Period and Extended Period of Eligibility, but these are temporary patches (9 months and 36 months respectively) that eventually expire, dumping the worker back onto the cliff. Reforming SGA into a gradual phase-out would require amending the Social Security Act, which is politically radioactive because any Social Security reform gets weaponized in elections. So the 1950s-era binary stays in place, and disabled workers keep choosing poverty over the risk of losing everything.