Massachusetts Full‐Cost State Supplement for Aged+Blind with Large Income

[MaxGhenis]

Our integration test in policyengine_us/tests/policy/baseline/gov/ssa/state_supplement/integration.yaml shows that an aged+blind household with 17,000 in countable income each receives a partial supplement (~$1833 each). However, older references suggested they might receive $0 or a smaller amount. We’ve updated the test to match the code’s partial offset logic, but we need to confirm whether Massachusetts has a special rule that zeroes out the benefit or if partial payments are correct.

Steps to investigate:

1. Check official Massachusetts regs on offsetting large leftover incomes for couples in a “Full Cost” arrangement.
2. If the official policy is that any leftover above a threshold zeroes the supplement, we need to revise the code’s offset logic.
3. Otherwise, the current partial offset is correct, and the older assumptions were inaccurate.