What benefits administration is
Benefits administration is the operational work of running the benefit plans a company offers. It spans:
- determining who is eligible, and from what date,
- running enrollment and collecting elections,
- transmitting those elections accurately to every carrier,
- feeding the correct deductions to payroll,
- reconciling carrier invoices against actual enrollment,
- processing mid-year changes tied to qualifying life events,
- administering continuation coverage when people leave,
- protecting participant health information, and
- filing required reports with federal agencies.
Two features make it harder than it looks. First, it is continuous — most of the deadlines are triggered by events, not by the calendar. Second, the same data has to stay synchronised across at least three systems that were not designed to talk to each other: payroll, the benefits platform, and each carrier.
Eligibility tracking
Nearly every downstream error starts here.
Waiting periods
The ACA caps waiting periods at 90 days. That is 90 calendar days, not three months — a distinction that trips up employers whose plan document says "first of the month following 90 days," a design that can exceed the limit depending on hire date. A common compliant alternative is first of the month following 60 days of employment.
Full-time status and variable-hour employees
For ACA purposes a full-time employee averages 30 or more hours per week, or 130 hours per month. For staff with predictable schedules this is straightforward. For variable-hour, seasonal and part-time populations, employers generally use the look-back measurement method:
- a measurement period of 3 to 12 months during which hours are tracked,
- an administrative period of up to 90 days to calculate results and run enrollment, and
- a stability period during which the resulting status is locked in — at least six months, and no shorter than the measurement period.
The consequence employers find counterintuitive: an employee who qualified as full-time during the measurement period keeps coverage through the whole stability period even if their hours drop. Restaurants, retailers, healthcare staffing and seasonal businesses carry most of this complexity.
Dependent eligibility
Plans must offer coverage to dependent children to age 26. Spousal eligibility rules vary by plan design. Dependent eligibility audits routinely find ineligible people still enrolled — ex-spouses after divorce, children past the age limit — and in a self-funded plan those claims are paid with company money.
Open enrollment
Open enrollment is the annual window in which employees may join, drop or change coverage without a qualifying event. Between windows, elections made through a Section 125 cafeteria plan are generally irrevocable unless a qualifying life event occurs — marriage, divorce, birth, adoption, death, or loss of other coverage. That irrevocability is a tax-code requirement, not a company policy, and explaining it as such prevents a great many arguments.
A workable sequence:
- 90 to 120 days out: receive renewal, evaluate alternatives, model contribution strategy, confirm affordability testing.
- 45 to 60 days out: finalise plan design and contributions; prepare communications.
- 30 days out: distribute materials and required notices; hold meetings; open the enrollment window.
- Window open, typically 2 to 3 weeks: collect elections; chase non-responders actively rather than passively.
- Close to effective date: transmit elections, verify carrier confirmation, set payroll deductions, audit the first invoice against expected enrollment.
Required notices frequently distributed at this point include the Summary of Benefits and Coverage, the Women's Health and Cancer Rights Act notice, the CHIP premium assistance notice, the Medicare Part D creditable coverage notice (due before October 15), and for self-funded plans the Notice of Privacy Practices.
ACA compliance
Are you an applicable large employer?
An applicable large employer (ALE) averaged 50 or more full-time and full-time-equivalent employees in the prior calendar year. Full-time equivalents are calculated by aggregating part-time hours, so a company with 35 full-time and 20 half-time employees can be an ALE without ever having 50 people on full-time schedules. Common ownership aggregation rules can also combine related entities.
The employer mandate
ALEs must offer minimum essential coverage providing minimum value to at least 95% of full-time employees and their dependents, and that coverage must be affordable. Two penalties apply, and for 2026 they are:
- Section 4980H(a) — failure to offer coverage to at least 95% of full-time employees. $3,340 per year (about $278.33 monthly) multiplied by all full-time employees minus 30, triggered if even one employee receives a premium tax credit on an exchange.
- Section 4980H(b) — coverage offered but unaffordable or lacking minimum value. $5,010 per year (about $417.50 monthly) for each employee who receives a premium tax credit.
The (a) penalty is the dangerous one because it applies to the entire full-time population rather than to individuals.
Affordability in 2026
For plan years beginning in 2026 the affordability threshold is 9.96%, up from 9.02% in 2025 and the highest it has been. Because employers cannot see household income, three safe harbors are available: W-2 wages (Box 1), rate of pay, and the federal poverty line. Under the federal poverty line safe harbor, the maximum employee contribution for the lowest-cost self-only plan is roughly $129.89 per month for mainland calendar-year plans beginning in 2026.
Affordability is always tested on the lowest-cost self-only option that provides minimum value — not on family coverage, and not on the plan most employees actually pick.
Reporting, and what changed
ALEs file Forms 1094-C and 1095-C. Employers filing 10 or more returns in aggregate across all information return types must file electronically.
The Paperwork Burden Reduction Act changed furnishing. Employers may now use an alternative manner rather than sending a 1095-C to every full-time employee: post a clear, conspicuous and accessible notice stating that employees may request their form, then provide it by the later of January 31 or 30 days after the request. For 2025 forms, the notice must be posted by March 2, 2026 and kept in the same website location through October 15, 2026. IRS Notice 2025-15 provides the implementing guidance. Filing with the IRS remains mandatory — only the automatic furnishing step is relaxed.
COBRA
COBRA gives qualified beneficiaries the right to continue group health coverage after events that would otherwise end it. Federal COBRA generally applies to employers with 20 or more employees on more than half of typical business days in the prior calendar year. Many states impose mini-COBRA obligations on smaller employers.
Duration
- 18 months — termination of employment (other than for gross misconduct) or reduction of hours.
- 29 months — where the Social Security Administration determines disability within the first 60 days of continuation.
- 36 months — divorce or legal separation, death of the covered employee, a dependent child ceasing to qualify, or the employee becoming entitled to Medicare.
The deadlines that generate liability
- Employer notifies the plan administrator of a qualifying event within 30 days.
- Administrator issues the election notice within 14 days of that notification.
- Qualified beneficiary has 60 days to elect, measured from the later of loss of coverage or the notice date.
- First premium is due within 45 days of election and must cover the period back to loss of coverage.
- Subsequent premiums carry a 30-day grace period.
Two failures dominate: not sending the initial general notice when someone first enrolls, and not documenting that the election notice was sent. In a dispute the burden effectively falls on the employer to show proper notice was given, so the mailing record matters as much as the mailing.
HIPAA
HIPAA reaches benefits administration in two distinct ways that are often conflated.
Privacy and security
Group health plans are covered entities. Protected health information must be safeguarded, access limited to those who need it, business associate agreements executed with vendors handling PHI, and breaches reported. Practical implications for an HR team: benefits data should not sit in shared drives or general email threads, and the people administering benefits should be a defined, limited group.
Employers sponsoring self-funded plans carry materially heavier obligations here than those buying fully insured coverage, because they handle claims-level information directly. If you are weighing that decision, our comparison of self-funded and level-funded plans covers the wider trade-offs.
Special enrollment rights
HIPAA requires plans to allow mid-year enrollment in defined circumstances:
- 30 days after marriage, birth, adoption, or placement for adoption, or after loss of other coverage.
- 60 days after losing Medicaid or CHIP eligibility, or becoming eligible for state premium assistance.
The 60-day window is missed more often than any other, because it is the one that differs from the general rule.
Benefits software and payroll integration
Below roughly 25 employees, spreadsheets and carrier portals are survivable. Past that, manual administration stops scaling — not because the volume is large but because the number of synchronisation points grows with every carrier and every mid-year change.
A benefits administration system should handle eligibility rules, an employee-facing enrollment experience, life event workflows, carrier transmission, COBRA administration, ACA measurement and reporting, and document distribution with proof of delivery.
Integration is where the value is, and where it breaks
Elections have to become payroll deductions, and enrollment has to match what the carrier bills. Three integration patterns exist:
- Native — payroll and benefits in one system. Fewest failure points; least flexibility in choosing best-in-class tools.
- API — near-real-time synchronisation between separate systems. Good when well built.
- EDI 834 — the standard electronic enrollment file, typically transmitted to carriers on a scheduled batch. Reliable, but it is a batch process, so errors surface on a delay.
Whatever the pattern, someone must still reconcile. The recurring failure is a discrepancy triangle: the employee believes they enrolled, the payroll system deducts nothing, and the carrier shows no coverage. Each system is internally consistent and the employee is uninsured. This surfaces at the pharmacy counter, not in a report — which is exactly why monthly reconciliation of carrier invoice against payroll deduction against platform enrollment is the single highest-value routine in benefits administration.
Common employer mistakes
- Never auditing carrier invoices. Terminated employees left active for months are common and expensive.
- Missing the 30-day COBRA notification. The clock starts at the qualifying event, not at the exit interview.
- Testing affordability on the wrong plan. It is the lowest-cost self-only minimum-value option, not the popular plan.
- Treating 90 days as three months. A waiting period design that reads sensibly can still breach the cap.
- Ignoring full-time equivalents. Employers become ALEs without noticing, then miss reporting entirely.
- Allowing mid-year election changes without a qualifying event. This jeopardises the Section 125 plan for everyone, not just the individual.
- Undocumented notice delivery. Sending the notice and being able to prove you sent it are different things.
- Forgetting the Medicare Part D creditable coverage notice due before October 15 each year.
- Handling PHI casually — benefits questions answered in general email threads, enrollment files on shared drives.
- Not reconciling after open enrollment. The errors exist; the only question is whether you find them in month one or month nine.
Best practices
- Keep a compliance calendar with both fixed dates and event-triggered clocks, and assign each item an owner by name.
- Reconcile monthly: carrier invoice against payroll deduction against platform enrollment. Investigate every variance rather than netting them.
- Document every notice — what was sent, to whom, on what date, by what method.
- Run affordability testing before finalising contributions, not after renewal is signed.
- Audit dependent eligibility periodically, particularly under self-funded arrangements.
- Outsource COBRA unless you have real capacity for it. The deadlines are unforgiving and specialist administrators are inexpensive.
- Write the termination checklist so COBRA notification, coverage end dates and final deductions are handled the same way every time.
- Communicate in plain language. Most enrollment mistakes are comprehension failures. Explain deductibles, coinsurance and out-of-pocket maximums concretely — the 2026 ACA out-of-pocket maximum is $10,150 for self-only and $20,300 for family coverage, and most employees have never had those terms explained at all.
- Keep plan documents current. Plan documents, SPDs and payroll practice should describe the same plan.
Frequently asked questions
What does benefits administration actually include?
Eligibility determination, enrollment, carrier transmission, payroll deduction feeds, invoice reconciliation, life event processing, COBRA, HIPAA safeguards and government reporting. It runs continuously rather than annually.
What is the ACA affordability percentage for 2026?
9.96%, up from 9.02% in 2025, per IRS Revenue Procedure 2025-25. Under the federal poverty line safe harbor that is roughly $129.89 per month for mainland calendar-year plans.
Which employers have to comply with COBRA?
Generally those with 20 or more employees on more than half of typical business days in the prior year. State mini-COBRA laws often reach smaller employers.
How long does an employee have to elect COBRA?
60 days from the later of loss of coverage or the election notice, then 45 days to make the first payment.
How long can a waiting period for new hires be?
90 calendar days maximum. First of the month following 60 days is a common compliant design.
Do we still have to mail Form 1095-C to every employee?
Not if you use the alternative manner of furnishing under the Paperwork Burden Reduction Act — post a compliant notice by March 2, 2026 for 2025 forms, keep it up through October 15, 2026, and furnish on request. IRS filing is still required.