IRMAA: Married Filing Jointly vs Separately
Last updated · Sources: CMS, SSA, BLS
Married filing jointly
Joint thresholds are exactly twice the individual ones. In 2026, IRMAA starts above $218,000 joint MAGI, with tiers at $274,000, $342,000, $410,000, and $750,000. Each spouse on Medicare pays the surcharge separately, so a couple in tier 1 pays 2 × $95.70 = $191.40 per month combined in 2026 Part B + Part D IRMAA.
Married filing separately (lived together)
The separate-return table has only three bands and jumps almost immediately to the second-highest surcharge:
| MAGI | Part B IRMAA / mo | Part B total / mo | Part D IRMAA / mo |
|---|---|---|---|
| $109,000 or less | $0.00 | $202.90 | $0.00 |
| > $109,000 and < $391,000 | $446.30 | $649.20 | $83.30 |
| $391,000 or more | $487.00 | $689.90 | $91.00 |
Example (2026): a spouse with $120,000 MAGI filing separately pays $446.30/month Part B IRMAA. Filing jointly with combined MAGI under $218,000, neither spouse would pay any IRMAA.
Separated all year
If you file separately and lived apart from your spouse for the entire year, you are treated like an individual filer and use the single thresholds. Source: CMS 2026 fact sheet; SSA.
Try both statuses in the calculator.
Questions
Does filing separately lower IRMAA?
Usually not. If you lived with your spouse at any time during the year, the separate-return table charges the second-highest surcharge on all MAGI above $109,000 (2026), versus a graduated table for joint filers.
What if we lived apart all year?
If you filed separately and lived apart from your spouse for the entire tax year, SSA uses the individual (single) thresholds instead.
Do both spouses pay IRMAA on a joint return?
Yes. With a joint return, each spouse enrolled in Medicare pays the surcharge for the tier set by your combined joint MAGI.