One in four ACA SEP enrollments comes from a client who waited until the last two weeks of their 60-day window to call a broker. That math works out to a lot of rushed enrollments, missed effective date windows, and clients who did not know they had options until they barely did.
Eight life events account for the majority of mid-year Marketplace SEPs. Each has a predictable timing window. An agency that tracks these events for its existing client base will surface more SEP conversations in a single month than most agencies handle in an entire OEP.
Key Takeaways
- Turning 26 is predictable to the day. Outreach 90 days before the birthday beats outreach after the coverage ends.
- A new baby creates an SEP on the birth date. Coverage can be backdated; clients who miss this often go uninsured for the first weeks of the child's life.
- Job change SEPs start on the date coverage ends, not the date the client calls. Catching clients in the first week post-job-loss is the only way to beat the COBRA election.
- COBRA months 15 to 16 are the proactive outreach window before the 18-month exhaustion SEP triggers. Waiting until month 18 gives clients no runway to compare.
- Medicaid redeterminations continue throughout 2026. Clients terminated from Medicaid have a 60-day Marketplace SEP from the termination date.
- County moves are underused. A client who relocates to a different rating area has a 60-day SEP even if their coverage does not change.
The eight triggers
| Life Event Trigger | SEP Window | Outreach Timing |
|---|---|---|
| Turning 26 (aging off parent's plan) | 60 days from coverage end | 90 days before 26th birthday SEP starts when parent's plan ends, not on the birthday itself |
| New baby (birth, adoption, foster placement) | 60 days from event | At due date or adoption notification Coverage can be backdated to birth date; do not wait until after |
| Job loss or reduction in hours | 60 days from coverage end | Week of job change COBRA decision and Marketplace SEP run concurrently; time matters |
| Approaching Medicare eligibility (turning 65) | 8-month IEP around 65th birthday | Age 64.5 (6 months before birthday) Not a Marketplace SEP; Medicare IEP. Coordinate ACA termination |
| Marriage or divorce | 60 days from event | At announcement or filing Marriage adds a dependent; divorce may remove coverage |
| Medicaid termination / redetermination | 60 days from termination date | At redetermination notice receipt Ongoing through 2026; state backlog varies |
| COBRA months 15 to 16 | 60 days from month-18 exhaustion date | Month 15 of COBRA Proactive outreach avoids the effective-date gap on transition |
| Moving to a new rating area (county move) | 60 days from move date | At announcement of relocation Plans vary by rating area; current plan may not transfer |
Illustrative trigger timing. Actual SEP windows depend on the qualifying event date, exchange processing, and plan-specific terms. Verify eligibility with the exchange before enrollment.
Turning 26: the highest-volume trigger
Every day, ACA-enrolled clients have children who are approaching their 26th birthday. The SEP for aging off a parent's plan is one of the most predictable events in any book of business. It is also one of the most underworked, because the client rarely contacts the broker until after coverage has ended.
Outreach 90 days before the 26th birthday gives the client three months to compare Marketplace options, understand how APTC eligibility works as an independent household, and make a plan selection before the coverage end date triggers the 60-day clock. A broker who calls at day 55 of the 60-day window is answering a question the client should have gotten to ask months earlier.
The trigger date is not the birthday. The trigger is the date the parent's employer-sponsored plan terminates the dependent. Most plans term the dependent on the last day of the month of the 26th birthday. Some term on the birthday itself. Brokers who track birthdays can send the outreach at a fixed offset and let the client confirm the actual coverage end date.
New baby: the backdatable SEP
A child born to or adopted by a Marketplace enrollee creates an SEP on the event date. Coverage for the newborn can be backdated to the birth date if the enrollment is completed within the 60-day window. A client who calls a broker on day 58 after the birth and completes enrollment gets coverage backdated to day one.
Most clients do not know coverage backdates to the birth date. They assume coverage starts from the date they enroll. The practical consequence of that assumption is that some clients delay the call because they think it does not matter whether they call week two or week seven. It matters a great deal if there were hospital bills in weeks one through six.
Brokers who serve clients in childbearing years should confirm whether any clients have an expected birth in the coming 60 to 90 days and plan the outreach around the due date.
Job change and the COBRA vs. Marketplace window
The job change SEP starts on the date employer-sponsored coverage ends. COBRA election notices arrive within 14 days of the qualifying event, but the 60-day COBRA election window and the 60-day Marketplace SEP window run at the same time. A client who elects COBRA and later decides it is too expensive cannot switch to the Marketplace mid-COBRA without a separate qualifying event.
Brokers who reach clients in the first week after a job separation can run the COBRA vs. Marketplace comparison before the COBRA election is made. A client paying $1,200 per month in COBRA premiums who qualifies for a $200-per-month Marketplace plan with APTC made a different decision than the numbers suggest, and often made it without knowing the Marketplace premium.
COBRA months 15 to 16: the underused window
Clients who elected COBRA at job loss are 15 months into an 18-month maximum continuation period. Three months from now, COBRA exhausts and a 60-day Marketplace SEP opens. The problem with waiting until exhaustion to start the Marketplace conversation is the effective date math: a client who enrolls in the Marketplace on the last day of the 60-day window gets coverage effective the first of the following month. A client whose COBRA ends May 31 and who enrolls on July 28 has a gap of the full month of August before Marketplace coverage starts on September 1.
Brokers who track COBRA election dates in their client records and set an outreach reminder at month 15 give clients three months to run the comparison, pick a plan, and time the enrollment to minimize the gap. That conversation does not happen when the broker calls at month 18.
Medicaid redeterminations: still active in 2026
The ACA continuous enrollment unwinding began in April 2023. As of mid-2026, several states are still processing backlogs of Medicaid redeterminations. Clients who receive a Medicaid termination notice have 60 days from the termination date to enroll in a Marketplace plan. Unlike most SEP categories, Medicaid-to-Marketplace transitions often qualify for cost-sharing reductions at Silver plan enrollment, in addition to APTC, because the income levels that put clients at Medicaid eligibility thresholds often align with CSR eligibility bands.
Brokers in states with large Medicaid populations should treat redetermination as an ongoing source of mid-year activity through the rest of 2026, not a completed unwinding event that happened in 2023 and 2024.
Marriage and divorce: the household change events
Marriage adds a household member and changes the MAGI calculation for APTC eligibility. Divorce removes a household member and may eliminate one spouse's access to the other's employer plan. Both events trigger 60-day SEPs.
The useful broker conversation happens at announcement, not after the paperwork finalizes. A client who mentions a pending marriage or separation at a routine touchpoint gives the broker a 30 to 90-day runway to model the subsidy impact of the household change and prepare enrollment options before the event closes.
County moves: the frequently missed SEP
A client who relocates to a new county gains access to a new rating area with potentially different plan options and premiums. The move triggers a 60-day SEP from the date of the move, even if the client's current insurer operates in the new county. The existing plan may not transfer, and the new county may offer better or worse premium rates depending on its insurer participation.
Most clients do not think to call their broker when they move. Asking about housing changes at every client touchpoint, particularly at renewal and at major life events, surfaces this SEP more often than the client initiates the conversation.
Building the outreach system
None of these eight triggers requires a sophisticated platform. A spreadsheet with client name, trigger type, key date, and outreach date covers the tracking for most agency sizes. The discipline is setting the outreach reminder before the event, not building the system during a slow week that never comes.
Agencies that do build CRM-based tracking tend to start with the two highest-volume triggers: turning 26 and COBRA month 15. Both are predictable to a specific date, require no incoming communication from the client, and produce SEP-eligible conversations when the outreach lands. The other six triggers are meaningful but depend more on client disclosure at intake or at annual touchpoints.
FAQ
How do brokers track client life events mid-year without a dedicated CRM?
Most ACA brokers rely on a combination of client-initiated contact, date-based calendar reminders, and carrier notifications. The most reliable method is setting calendar reminders for predictable events: birthdates for aging-off dependents, COBRA election dates, and Medicaid redetermination notice dates when clients share them. A simple spreadsheet with a client name, event type, and outreach date handles the tracking for most books. The trigger-based approach works better than waiting for clients to call because the 60-day SEP window closes regardless of whether the client is aware of it. Platforms like Connecture and Inshura offer some client tracking, but neither advertises automated SEP reminders as a core feature. The agency carries that responsibility.
Does a county move always trigger a Marketplace SEP?
Yes, if the client moves to a new rating area. ACA Marketplace plans are rated by county. A client who moves from one county to another within the same state may gain access to different plans at different premiums. The move triggers a 60-day SEP from the date of the move, even if the client's current plan continues to cover them during a grace period. Clients who move within the same county are not eligible for a move-triggered SEP because the rating area has not changed. Brokers who ask clients about housing changes at each contact point can surface this SEP more frequently than the once-a-year open enrollment touchpoint suggests.
What is the Medicare Initial Enrollment Period and how does it interact with ACA coverage?
The Medicare Initial Enrollment Period runs for 7 months: the 3 months before the month of the 65th birthday, the birthday month itself, and the 3 months after. Clients who are actively enrolled in ACA Marketplace coverage should coordinate the termination of that coverage with the start of Medicare Part B to avoid paying premiums for two overlapping coverages. A client who qualifies for Medicare but stays on Marketplace coverage does not receive APTC for months they are enrolled in Medicare. Brokers who identify clients approaching 64.5 can open a Medicare conversation 6 months before the birthday, leaving time to compare costs and avoid both a coverage gap and a premium overlap. This is not a Marketplace SEP; it is a Medicare enrollment window with its own rules.
How long does a broker have to reach a client after a job loss before the SEP window gets too tight?
The 60-day window starts on the date the employer-sponsored coverage ends, not the date of the job separation. For clients whose coverage ends on the last day of the month of termination, there are 60 days from that date to enroll in a Marketplace plan. The COBRA election window runs 60 days from the date of the qualifying event notice. Both clocks run concurrently. A broker who reaches a client in the first two weeks after job loss can explain both options and the premium differential before the client has committed to COBRA. A broker who reaches the client in week 8 is explaining options after the window is closed or nearly closed. The shorter the gap between job loss and first broker contact, the more useful the conversation.
Are Medicaid redetermination SEPs still happening in 2026?
Yes. States began the continuous enrollment unwinding in April 2023, and the redetermination backlog varies significantly by state. As of mid-2026, several states are still working through cases that were paused or delayed during the unwinding period. Clients who receive a Medicaid termination notice have 60 days from the termination date to enroll in a Marketplace plan under 45 CFR 155.420(d)(1). Brokers in states with large Medicaid populations should treat redetermination as an ongoing lead source through 2026, not a past event that has finished.
