HSA health savings account maximum contribution

[persimman]

I went on Medicare in oct 2025. I thought I couldn't make any HSA contributions less than 6 months before enrollment (which would be April). Well, I did NOT make any HSA contributions early in the year, so I interpret that I lost the opportunity and can't put it in now (before filing 2025 tax return).  But working through TT, I fill in the page that says I was on HDHP family plan 9 months, and Medicare 3 months. Then the button says "calculate your maximum contribution".  and it calculates and reports back $7163. how can that be?  The maximum is $4300 + $1000 = $5300, AND what about the 6 -month limit?  Why is TT saying I can contribute $7163?

To continue, worked through the wife's info, who was on our family plan for 9 months, then individual plan for 3 months. "calculate your maximum contribution" then says ... $7163.  How and why?  And, suspiciously, when I click "calc max.." for me, the page with the answer has my name on the top.  For my wife, the page has her name at the top when I enter the monthly coverages, but when I click the "calc max" button, the table changes to MINE, with my name at the top. 

Please help.

[Mike9241]

The $7163 is misleading. It is the maximum you COULD have contributed before you went on Medicare; since you contributed $0 before going on Medicare, you cannot contribute now.  

However

Eligibility for an HSA is determined for each person individually, not for a married couple as a single unit. If one spouse has a qualifying HDHP (such as covered by a family plan) and no disqualifying insurance, they remain eligible to contribute to their HSA. Their eligibility is not canceled just because the other spouse enrolls in Medicare.

If the HDHP covers more than one person, such as both spouses, it is considered family coverage. This allows the eligible spouse to use the higher family contribution limit, even if the other spouse is on Medicare and cannot contribute.

There's a bug in TurboTax that takes you back to your screen rather than calculating your spouse's maximum. 

If you withdrew nothing from your HSA for MEDICAL expenses (no 1099-SA) in 2025, you can delete your Form 8889-T because with it showing nothing, it will not be included with your e-filed return.

Another workaround would have been to do your spouse's first to calculate her maximum and then yours.  

This means your spouse can contribute $8550 times 75% + $4300 times 25% + $1000( being 55 or older)

If my math is correct, that's $8488. Further, you will need to enter the actual contribution to her HSA by 4/15/2026 on her HSA Form 8889.

You need to indicate family coverage for the first 9 months and then self-only for the rest of the year on her Form 8889 to get the correct answer

[persimman]

Thanks, M9241, that was very helpful. Just a couple details to clarify and then it's closed. The only help I got from TT phone support was a suggestion to look at the actual forms. She said the reason Wifey's calculation reverted to mine was that mine was the best option. I said I didn't believe her. Then she wanted me to click the $60 dollar button for competent help. So I was working through the forms manually when I saw your post.

The HSA family max still applied until I went on Medicare in October; then Wifey went to single rate and I could no longer contribute. (I had mistakenly thought my wife's entire 2025 contribution was limited to single 4300 rate).

I can still contribute for the 9 months before I went on Medicare, provided I pay before tax time.

Form 8889 (you should have it open while reading all this...) is done twice, once for me and once for Wifey. For me, line 3 takes the family max 8550 x 9/12 = 6413.

Then for Wifey it takes 8550 x 9/12 (family rate) + 4300 x 3/12 (individual rate) = 7488. (TT gathers this info each month, just as you said.) But we can't BOTH contribute those amounts. There is a comparison to see which choice is better, which is the wife at 7488. So IRS takes MY 6413 to zero on line 6, but carries through Wifey's 7488 to her line 6. 

Then line 7 Wifey gets an extra 1000 due to age. My line 7 gets 1000 x 9/12 = 750.

So the final 8889 line 13 says 750 on mine, and 8488 on Wifey's. So, a total family contribution of $9238 out of the original 10,550 maximum. It seems like that works, and I have until filing date to finish the contributions.

TT "maximum contribution for James is 7163" is an interesting screw-up. On the 8889 form, which TT filled out correctly automatically, they took my line 6 to zero as stated, and added the 750 in line 7; the form shows a total of 750.  Again, TT 8889 shows my contribution at $750, but the software outputs $7163. Bad programming, boys and girls. But look! if we keep the 6413 from line 5, and add the 750, that's 7163. So TT runs through the calcs, and says (DOESN'T SAY) if Dad would make the entire family HSA contribution, he can do 7163, and Wifey is limited to 1000 in addition, for a total family contribution of $8163. Then TT looks at Wifey's 8889, takes away my 6413 to use her 7488, and, if the software wasn't stuck in a loop, TT should say if Wifey would make the family HSA contribution she can do 8488, and Dad is limited to 750 in addition, for a total family contribution of $9238. This is your MAXIMUM family HSA contribution. 

so, yeah, really glad for the reminder to look directly at the tax forms, and your explanation of the proportional months was very helpful. 

Best of luck and encouragement to all as we fight this software together!