How to Set an ICHRA Administrative Period & Coverage Dates (2026)

TL;DR

The ICHRA administrative period is the window before your plan year starts when you send required notices, employees shop for individual coverage, and everyone completes enrollment paperwork. Federal rules require at least 90 days of advance notice and grant employees a 60-day special enrollment period to purchase individual health insurance. Getting this timeline wrong can delay coverage start dates, create gaps in employee health insurance, or even force two open enrollments in a single year.

Setting up an ICHRA sounds straightforward until you hit the timing questions. When do you notify employees? When can they start shopping for plans? What happens if someone gets hired three months after the plan year begins? The administrative period is where all of these questions converge, and mismanaging it is one of the most common mistakes first-time ICHRA administrators make.

This matters more than you might think. Over 83% of employers offering ICHRA benefits in 2025 had never previously provided health coverage to their workers, according to a SureCo/Oscar report cited by HealthInsurance.org. Most are navigating enrollment timing for the first time.

Schedule a free consultation if you want help mapping out your specific timeline before reading further.

This guide walks through exactly how to set an ICHRA administrative period and its effects on coverage start dates, covering every scenario from clean January 1 launches to messy mid-year starts and new-hire situations.

What Is an ICHRA Administrative Period?

The ICHRA administrative period is the pre-plan-year window when employers finalize plan documents, distribute legally required notices, and give employees time to select individual health coverage before reimbursements begin.

This is not a term defined in the June 2019 HRA final rule. It is an operational concept driven by three binding federal timelines:

1. The 90-day notice requirement, which dictates when employers must inform employees about the ICHRA offer.
2. The 60-day special enrollment period (SEP), which gives employees time to purchase qualifying individual coverage.
3. The substantiation and attestation process, which confirms employees actually enrolled in a plan before reimbursements can flow.

Think of the administrative period as the runway your ICHRA needs before takeoff. Too short a runway, and employees cannot get coverage in time. Too long, and you are sitting on a benefit nobody is using yet.

How It Differs from the Runout Period

A common point of confusion: the administrative period happens before the plan year starts, while the runout period happens after it ends. Employees typically have up to 90 days after a benefit year concludes to submit expenses incurred during that plan year for reimbursement. These are opposite ends of the ICHRA lifecycle, and mixing them up creates compliance headaches. For a deeper look at how reimbursements work after the plan year, see this reimbursement claims guide.

Key Timelines That Define the Administrative Period

Understanding how to set an ICHRA administrative period starts with three overlapping deadlines. Here is how they fit together.

The 90-Day Notice Rule

Federal ICHRA regulations require employers to provide written notice to eligible employees at least 90 days before the start of each plan year. This notice must include specific information: the ICHRA allowance amount, a statement that the employee must have individual health coverage to participate, and information about how the benefit may affect their eligibility for premium tax credits.

For a calendar-year plan starting January 1, the notice deadline is October 3 of the prior year (technically October 2, counting back exactly 90 days, but most administrators round to October 3 to build in a buffer).

There is an exception for new hires and newly eligible employees. If someone gains eligibility after the plan year has already started, the employer can provide the notice any time up to the first day the employee’s ICHRA coverage begins.

The 60-Day Special Enrollment Period

The 60-day SEP is what makes ICHRA work outside of open enrollment. When an employer offers an ICHRA for the first time or renews the benefit for a new plan year, employees who need to purchase individual coverage get a special enrollment period to do so.

Here is the critical detail that trips up most administrators: the direction of the SEP depends on whether you gave adequate advance notice.

With 90+ days of advance notice: The 60-day SEP runs before the ICHRA coverage start date (the “triggering event”). Employees shop for plans during this window so coverage is active on Day 1.

Without adequate advance notice (new hires, late starts): The SEP runs for 60 days after the triggering event. The employee still gets time to enroll, but coverage will not be active from the start.

This distinction is the single most important factor in how your administrative period affects coverage start dates.

Practical Timeline: Day -90 Through Day 0

Here is what a well-managed administrative period looks like for a January 1 plan year:

This clean timeline only works when you plan ahead. If you are still designing employee benefit classes in September, you are already behind.

How the Administrative Period Affects Coverage Start Dates

The effects on coverage start dates vary dramatically depending on when your plan year begins, when employees become eligible, and whether you are launching a new ICHRA or renewing an existing one.

Calendar-Year Start (January 1)

This is the simplest scenario. A January 1 ICHRA start date aligns with the ACA marketplace open enrollment period, which for 2027 coverage runs November 1 through December 15. Employees who receive their 90-day notice by early October can shop during the regular marketplace open enrollment window, and their individual coverage starts January 1, the same day as the ICHRA plan year.

No special enrollment period is even necessary in many cases because the timing overlaps with open enrollment. This alignment is one of the strongest arguments for choosing a calendar-year plan.

Mid-Year Start

An ICHRA can start any month of the year. But a mid-year launch introduces complications.

When the plan starts mid-year, it triggers a special enrollment period. Employees will be selecting health insurance on or around the triggering event. Their individual coverage typically becomes effective the first day of the month following plan selection, according to Gusto’s ICHRA administration guidance. This creates a potential gap between when the ICHRA benefit is available and when the employee’s individual policy actually kicks in.

For example, if your ICHRA starts July 1 and an employee enrolls in a marketplace plan on July 5, their individual coverage may not begin until August 1. That is a full month where the ICHRA exists on paper but the employee has no qualifying coverage to reimburse.

Practitioners at benefits administration firm Benafica have pointed out another wrinkle: after a mid-year launch, employers typically need to shift to a calendar-year cycle for subsequent years. That can mean two open enrollments in your first year, an operational headache worth planning for.

New Hires Mid-Plan-Year

New hires present the most complex timing scenario. When an employee is hired after the plan year has started, you can provide the ICHRA notice at any time up to their first day of eligibility. But because there is no 90-day advance notice, the SEP works differently.

Consider this example from Newfront’s employer guide: An employee is hired July 15 and becomes eligible for ICHRA coverage effective August 1. They have two SEP windows:

• July 15 through July 31 (before the triggering event), or
• August 1 through September 30 (60 days after the triggering event)

If the employee enrolls during the post-event window, their individual coverage likely starts the first of the following month. That creates a brief but real coverage gap. Employers should communicate this clearly during onboarding. If you are evaluating platforms that automate eligibility verification, look for ones that flag these timing gaps automatically.

Non-Calendar Year Plan Renewals

For employers renewing an existing ICHRA on a non-calendar-year basis, a different SEP rule applies. Employees enrolled in marketplace plans can switch to another plan, but they are limited to the same metal level (bronze, silver, gold, platinum). If their current metal level is not available, they can move one level up or down. This restriction matters because it means employees have less flexibility during renewal SEPs than during initial ICHRA offer SEPs.

Transitioning from a Group Plan

If your company currently offers group health insurance and wants to switch to an ICHRA, the administrative period takes on extra importance. Your ICHRA start date should be one day after you cancel the group policy to prevent any gap in coverage. For example, if the group plan ends December 31, the ICHRA should start January 1.

This means running the entire administrative period (notices, SEP, enrollment) while the group plan is still active. Employees need to understand they are shopping for individual coverage that will replace their current plan, not supplement it.

Common Administrative Period Mistakes

Getting the ICHRA administrative period wrong can delay coverage, frustrate employees, and create compliance risk. Here are the most frequent errors.

Sending notice too late. If the notice arrives inside the 90-day window, employees lose the pre-triggering-event SEP. They will still get a 60-day post-event window, but that means coverage does not start on Day 1 of the plan year. Discussions on Reddit’s r/smallbusiness confirm that timing confusion is one of the top reasons employers seek third-party administrators for ICHRA setup.

Not coordinating with marketplace open enrollment. For calendar-year plans, the 90-day notice window and marketplace OEP overlap beautifully. But only if you plan for it. Missing the OEP means employees must rely entirely on the ICHRA-triggered SEP, which some carriers handle more slowly.

Assuming employees auto-enroll. Employees do not automatically get individual coverage when you offer an ICHRA. They must actively shop for and purchase a qualifying plan. If they do not, they cannot participate in the ICHRA, and your benefit dollars sit unused.

Forgetting the “double open enrollment” problem. A mid-year ICHRA launch likely means running enrollment again just months later when shifting to a calendar-year cycle. Budget the administrative time (and employee communication) for this.

Skipping substantiation collection. Employers must take reasonable steps to verify that participating employees actually have individual coverage. Current employees need to meet attestation requirements at the start of each plan year and each time they submit a reimbursement request. Collecting this documentation is part of the administrative period, not an afterthought.

Want to avoid these pitfalls? A platform with automated notice tracking and enrollment coordination handles the heavy lifting.

How to Set an ICHRA Administrative Period: Step by Step

Here is a concrete, six-step process for setting up your administrative period correctly. This applies whether you are launching a new ICHRA or renewing an existing one.

Step 1: Choose Your Plan Year Start Date

January 1 is the most common and simplest choice because it aligns with marketplace open enrollment. But if you need to start sooner (to replace an expiring group plan, for instance), pick the first day of any month. Just be aware of the mid-year complications described above. For a full walkthrough of the initial setup, refer to this complete ICHRA adoption guide.

Step 2: Count Back 90 Days for the Notice Deadline

From your chosen start date, count back 90 calendar days. That is your hard deadline for getting the ICHRA notice into employees’ hands. Build in a few extra days for distribution logistics (email delivery, postal mail, etc.).

Step 3: Count Back 60 Days for the SEP Window Opening

If you hit the 90-day notice deadline, the 60-day SEP opens automatically 60 days before the plan year start. Employees can begin shopping for individual coverage at this point.

For a January 1 start, the SEP opens around November 2. This overlaps with the ACA marketplace open enrollment period, giving employees two simultaneous reasons (and paths) to enroll.

Step 4: Communicate Enrollment Instructions

Simply sending the legal notice is not enough. Employees need practical guidance: where to shop (marketplace vs. off-exchange), how to compare plans, what “minimum essential coverage” means, and how the ICHRA allowance interacts with premium tax credits and affordability rules. Licensed broker support during this window significantly reduces confusion. SimplyHRA’s broker team, authorized in every state, provides this kind of hands-on enrollment guidance.

Step 5: Collect Attestation and Substantiation

Before reimbursements can begin, employees must attest that they (and any covered dependents) are enrolled in qualifying individual health insurance. Collect proof of enrollment, whether that is a marketplace confirmation, an insurance card, or a carrier letter, during the final weeks of the administrative period.

Step 6: Begin Reimbursements on Day 1

When the plan year starts and you have verified coverage, reimbursements can flow. Platforms with payroll-triggered reimbursement workflows make this seamless by tying payments to your existing payroll cycle.

What Happens If an Employee Misses the Window?

If an employee does not enroll in individual coverage during the SEP, they cannot participate in the ICHRA until they obtain qualifying coverage through another qualifying life event or the next open enrollment period. The ICHRA allowance designated for that employee goes unused during the gap.

This is why the administrative period is so important. It is not just a bureaucratic formality. It is the window that determines whether your employees actually receive the health benefit you are paying for.

ICHRA adoption grew 34% among large employers and 52% among small employers year-over-year according to the HRA Council’s 2025 Growth Trends report. As more companies adopt this benefit model, the stakes of getting timing right only increase.

Frequently Asked Questions

Can an ICHRA start mid-year?

Yes. An ICHRA can start the first day of any month. However, a mid-year start triggers a special enrollment period rather than aligning with marketplace open enrollment. This often results in coverage starting the first of the month after an employee enrolls, creating a brief gap. You may also face a “double open enrollment” situation in your first year when transitioning to a calendar-year cycle.

What triggers the ICHRA special enrollment period?

A new ICHRA offer or the renewal of an existing ICHRA benefit is the triggering event. When an employer makes an ICHRA available, employees who need individual coverage receive a 60-day SEP to enroll through the marketplace or directly with a carrier.

Does the 90-day notice apply to new hires?

No. New hires and employees who gain eligibility mid-plan-year can receive the ICHRA notice at any time up to their first day of coverage. Because they lack 90 days of advance notice, their 60-day SEP typically runs after the triggering event rather than before it.

What must the ICHRA notice include?

The notice must state the ICHRA allowance amount, explain that employees need qualifying individual coverage to participate, describe how the benefit may affect eligibility for premium tax credits, and provide the start date of ICHRA coverage. For applicable large employers, the notice must also address ACA affordability information.

What is the difference between the administrative period and the runout period?

The administrative period is the pre-plan-year window for notices, enrollment, and substantiation. The runout period is the post-plan-year window (typically up to 90 days) during which employees can submit expenses incurred during the prior benefit year for reimbursement. One comes before coverage; the other comes after.

Can employees switch plans during an ICHRA renewal?

During a non-calendar-year renewal, employees with marketplace coverage can switch plans, but the SEP limits them to the same metal level. If that metal level is unavailable, they may move one level up or down. This is more restrictive than the SEP for an initial ICHRA offer.

What happens if coverage starts after the ICHRA plan year begins?

If an employee enrolls in individual coverage after the plan year starts (common with new hires), their ICHRA reimbursements begin when their individual coverage becomes effective, not when the plan year started. Any ICHRA allowance for the gap period is generally prorated or unavailable.

How does setting the ICHRA administrative period affect year-end reporting?

The plan year dates established during the administrative period flow directly into your 1095-C reporting codes for applicable large employers. Getting the start date and coverage effective dates right during the administrative period prevents reporting headaches at tax time.

Understanding how to set an ICHRA administrative period and its effects on coverage start dates is the difference between a benefit that works on Day 1 and one that leaves employees uninsured for weeks. The timeline is not complicated, but it is unforgiving. Miss the 90-day notice window, and the entire enrollment sequence shifts.

Schedule a demo to see how SimplyHRA automates notice tracking, enrollment coordination, and payroll-triggered reimbursements so you never miss a deadline.