Guides / Life changes
Turning 26
You age off your parent's plan at 26. The window to act is short and the default is expensive.
The mistake here is not choosing badly. It is not choosing at all, missing the window, and then having nothing until January.
What actually happens
You can stay on a parent's plan until you turn 26. Exactly when you come off depends on the plan: many run to the end of the birthday month, some to the end of the plan year. Ask, in writing, and get the date.
Losing a plan this way is a qualifying life event, which opens a special enrolment period, normally 60 days, to take up something else outside the usual annual window. Miss it and you are generally waiting until the next open enrolment.
The clock, and the one thing that is not on it
- Your 26th Many plans run to the end of the birthday month, some to the end of the plan year. Ask for the date in writing.
- Day 1 Losing the plan is a qualifying life event. A special enrolment period opens.
- 60 days The special enrolment period normally closes here.
- Any day Medicaid does not use this window. Enrolment is open year round, so check it first at apply.mt.gov.
Montana Medicaid and apply.mt.gov, cited below.
Check Medicaid first, seriously
Montana expanded Medicaid, and in March 2025 the legislature removed the expiry date that used to hang over it, so it is not a temporary programme any more. Adults up to 138% of the federal poverty level qualify, which for a single adult was roughly $21,600 a year in 2025 terms.
A lot of 26-year-olds in their first job, working part time, in graduate school or self-employed and slow are inside that line and never check. Enrolment is open year round, not just in a window. Apply at apply.mt.gov.
Do this before you buy anything. It takes twenty minutes and it is free.
Then compare what is left
An employer plan, if you have one available. Usually the cheapest route because the employer pays part of it.
A marketplace plan. Subsidies are based on income, and if yours is modest the number can be far lower than the sticker price. Worth pricing even if you assume you cannot afford it.
A membership like CoreMed, which covers everyday care outright and pairs with sharing for large events. It is not insurance and does not behave like it, so read how sharing works before deciding.
Nothing. Common at 26 and the one option with unbounded downside. If you go this way, at least know about hospital charity care and your right to a price up front.
Do this in the next week
1. Ask your parent's plan for your exact end date in writing.
2. Check Medicaid at apply.mt.gov.
3. If you are employed, ask HR what you are eligible for and when.
4. Price the marketplace with your real expected income.
5. Pick something before the 60 days run out.
Sources
- healthinsurance.org, Medicaid in Montana
- Montana Free Press, Governor signs bill lifting the Medicaid expansion sunset (HB 245)
- Montana Department of Public Health and Human Services, apply.mt.gov
Checked 21 August 2026. Rules and thresholds change, so follow the source before relying on a figure here.
Who publishes this. CoreMed Healthcare is a Montana healthcare membership company. We publish these guides because we think the information should be easy to find, and because our own members need it. They are written to answer your question rather than to sell you a membership: where the right answer is a hospital charity care programme or a different kind of plan, that is what they say. Nothing here is legal, tax or medical advice.
Common questions
Do I come off on my birthday?
It depends on the plan. Many run to the end of your birthday month, others to the end of the plan year. Ask for the date in writing rather than assuming.
How long do I have to choose?
Losing a plan opens a special enrolment period, normally 60 days. Medicaid is different. You can apply at any time of year.
I am healthy. Can I skip it?
You can. There is no federal penalty any more. The risk is that one accident produces a bill you cannot pay, which is the scenario worth thinking about rather than the flu.
Does a CoreMed membership count as insurance?
No. It is a membership, and the sharing side is a non-profit community rather than an insurer. That distinction matters for some tax and employer situations, so read the detail before you assume it substitutes.
Related
Hospital charity care in Montana
Most Montana hospitals are legally required to have a programme that can reduce your bill to nothing. Hardly anyone knows to ask.
Getting a price before you are treated
If you are paying cash, you have a legal right to a written price before scheduled care. Most people never ask for it.
You just lost your health plan
Job gone, plan gone. There is a 60-day window and a default option that is usually the wrong one.