
Form 8889 in 2026: HSA Reporting Without Triggering the 6%, 10%, or 20% Penalty
A 2026 walkthrough of Form 8889 — HSA contribution limits ($4,400 self-only, $8,750 family), the triple tax advantage, the last-month rule's 13-month testing period, the Medicare six-month retroactive enrollment trap, and the six most common filing mistakes that trigger the 6% excess-contribution excise tax, 10% recapture, or 20% non-qualified-distribution penalty.










