Most people treat their subsidy as something settled once a year, at enrollment, and then left alone until the next open enrollment. It is not. It is a running calculation, and a dozen ordinary things move it during the year. Some of them are obvious, like a raise. One of them ends your subsidy even if you turn down what you were offered. That is the one that costs people most, because nothing about it feels like an insurance event.
Why reporting matters more than it used to
The cap on paying back excess subsidy is gone. Every dollar too much now comes back in full.
For years there was a ceiling on how much excess subsidy a household under 400% of the federal poverty level could be made to repay at tax time. That ceiling was repealed, effective for tax years beginning after December 31, 2025.
So the arithmetic changed. If your income or household changes and you say nothing, you keep collecting a subsidy based on a picture that is no longer true. The whole difference comes back on your return. There is no longer a cap that softens it, and the households that lost that protection are exactly the ones the cap used to cover.
The fix is not complicated, it is just a habit. Report the change in the month it happens, your credit adjusts going forward, and April holds no surprise. Reporting takes minutes. Not reporting is what gets expensive.
What the repayment cap repeal changed
| Then | Now |
|---|---|
| A household under 400% of the federal poverty level owed back only up to a capped amount if it took more subsidy than it turned out to qualify for. | That cap is gone for tax years beginning after December 31, 2025. The full difference is repaid on your return. |
| Not reporting a raise promptly meant a bill, but a limited one. | Not reporting a raise promptly means the whole overpayment comes back at once. |
Scroll the table sideways to see every column.
This is why reporting in the month a change happens matters more than it used to.
The one that catches people: a job offer nobody accepted
An offer of employer coverage can end your subsidy even if you decline it, and this applies to a spouse's offer too.
This is the change that does not feel like a change, and it is the one we see hurt people most.
Say you or your spouse are offered health coverage at work. If that offer counts as affordable and meets a minimum standard of value, you generally cannot claim a premium tax credit for a Marketplace plan. Whether or not you enroll in it. Turning it down does not restore your eligibility. The offer alone is what counts.
Two details make this worse in practice. It applies to a spouse's offer, not only your own, so one person changing jobs can affect coverage for a household that has nothing to do with that employer. And affordability is measured as a set share of household income, 9.96% for 2026, so a plan your spouse considers expensive can still count as affordable under the rule.
There is a real test here, not a blanket disqualification. Since 2023, family coverage is measured against what covering the family actually costs, not just the employee. So this is worth running rather than assuming in either direction. If a job change is coming for anyone in your household, tell us before the coverage starts, not after.
This walks the same test your agent would. It is a guide, not a determination, because affordability turns on figures that change annually and on your household’s specific numbers. The one thing that cannot be undone afterwards is the timing, so bring us the benefits summary before the coverage start date.
Everything the Marketplace expects you to report
Grouped by how often we actually see them, not alphabetically.
The list below is what the Marketplace asks you to report. Most of it is ordinary life.
- Money. Any expected change in income. A raise, a lost contract, a second job, a bonus, unemployment starting or stopping, a retirement account withdrawal, a large capital gain. Self-employed income counts as net after expenses, and lumpy years need updating as they unfold rather than once at the end.
- Someone gets other coverage. A household member is offered job-based insurance, or becomes eligible for Medicaid, CHIP or Medicare. This is the section that contains the trap above.
- Someone loses coverage. A job ends, Medicaid eligibility ends, or job-based coverage stops for any reason. Opens a window
- The household grows, or someone ages off. Marriage, a birth, an adoption or foster placement, or a child on your plan turning 26. Opens a window
- Other household changes. Divorce, a pregnancy, a death, or a change in who you claim as a dependent. All of these move your subsidy and all of them need reporting. Whether one also opens a window depends on whether somebody actually loses coverage because of it, so ask.
- You move. Report an address change within the same state. Moving to a different state is different: do not update the existing application, because you need a new one. This trips people every year and it can leave a gap. Opens a window
- Your tax or status details change. Filing status, disability status, citizenship or immigration status, tribal membership, incarceration or release, and simple corrections to a name, date of birth or Social Security number.
Where you see “opens a window”: that change is also a qualifying life event, giving you roughly 60 days to change plans entirely rather than just adjust a number. Most people report the change and miss the window.
Some of these open a door as well as closing one
Several reportable changes are also qualifying life events, which means a window to switch plans outside open enrollment.
It is easy to read that list as pure obligation. Half of it is opportunity.
Marriage, a birth, a move, losing other coverage and a child aging off a parent's plan are qualifying life events, which open a Special Enrollment Period. That is generally around 60 days, and inside it you can change plans entirely rather than just adjusting a number.
That matters. The plan that fitted a household of two may be wrong for three, and the network that worked in your old county may not exist in the new one. A change that forces you to update your application is also your one chance mid-year to fix a plan that no longer fits. Most people report the change and miss the window.
Your credit adjusts forward from the date the Marketplace has the new information, so the correction arrives in slices small enough that you barely feel them.
Nine months of subsidy were calculated on a picture that was no longer true. With the repayment cap repealed, the whole difference comes back on your return.
Same life event, same amount of money, different month of reporting. That is the entire difference between an adjustment you do not notice and a bill you did not plan for.
How to actually keep on top of it
Four habits, and the first one prevents most of the damage.
Open enrollment for 2027 coverage runs November 1 to January 15, 2027, with December 15 the cutoff for coverage starting January 1. Outside that window it is life events that let you act.
- Report in the month it happens. Not at renewal, not at tax time. Your credit adjusts forward from the report, so the sooner it lands the smaller the correction.
- Tell us before a job starts, not after. The employer-offer rule is the one you cannot unwind retroactively, and a five minute conversation beforehand is the whole difference.
- Keep the paperwork. Pay stubs, a benefits summary from the new employer, the letter ending old coverage. If the Marketplace asks you to document something, it comes with a deadline, and missing that deadline can cut a subsidy mid-year.
- Ask whether the change opened a window. If it did, use it. It is the only mid-year chance to change plans rather than just adjust the credit.