The COBRA premium is one of the few numbers in benefits administration where being wrong in either direction creates a problem. Charge too much and you have a compliance violation and a refund obligation. Charge too little and the plan absorbs the difference — and if you self-insure, that difference is real money against a population that is, by definition, adversely selected.
This guide covers how the applicable premium is determined, when the 102 percent and 150 percent ceilings apply, how long a rate must hold, and the payment rules that decide whether coverage stays in force.
Everything starts with the applicable premium — the cost to the plan of providing coverage for a period to similarly situated beneficiaries who have not experienced a qualifying event.
Two things about that definition drive most calculation errors.
It is the total cost, not the employee's share. The applicable premium includes both the employer contribution and the employee contribution. An employee accustomed to paying $180 per month for family coverage will see a COBRA rate closer to the full $1,400 the plan actually costs. The rate is not a penalty and it is not markup — it is the underlying cost that the employer was previously subsidizing.
"Similarly situated" means the same coverage tier and options. You compare against active employees with the same plan option, same coverage tier, and same benefit package — not an average across the whole population.
The extra 2 percent is an administrative allowance, not a required charge. Plans may charge less than the ceiling, and many do — but a plan that charges less must do so consistently.
The 150 percent ceiling is narrower than employers often assume. It applies only during the 11 extension months (months 19 through 29), and only to the disability extension. If the extension covers the disabled qualified beneficiary and their family members, the 150 percent rate may be applied to all of them during those months — but if the disabled individual drops coverage and only non-disabled beneficiaries continue, the rate reverts to 102 percent.
For a fully insured plan the calculation is straightforward: the applicable premium is the premium the insurer charges the plan for similarly situated active coverage, by tier.
Applicable premium (family tier) $1,400.00
× 102% $1,428.00 ← monthly COBRA rate
Watch for two adjustments that are easy to miss: any premium credit, rebate, or experience refund that reduces the plan's actual cost should be reflected, and broker or administrative fees built into the carrier rate are already included and should not be added twice on top of the 2 percent.
Self-funded plans must estimate the cost, and the regulations permit two methods.
Actuarial method. A qualified actuary determines the cost of providing coverage for similarly situated beneficiaries, based on reasonable actuarial assumptions. This method is always available.
Past-cost method. The premium is based on the plan's actual cost during a comparable 12-month period, adjusted by the change in the implicit price deflator for gross national product. This method is simpler — but it is not available if there has been a significant change in coverage under the plan or in the covered employee population between the determination period and the comparable prior period. A new plan design, a major carve-out, an acquisition, or a large layoff all disqualify it.
Most self-funded employers use the actuarial method for exactly that reason: plan and population changes are common, and re-qualifying the past-cost method every year is more work than commissioning the actuarial determination.
Whichever method you use, document it. The choice and its support are what you produce in an audit.
The applicable premium is fixed in advance for a determination period — a 12-month period selected by the plan. Once set, the rate generally cannot be changed during that period.
There are three exceptions. The premium may change mid-period if:
This is why the determination period should align with your plan year. If it does not, you end up with COBRA rates that lag plan design changes by several months, and you cannot correct them mid-stream.
Getting the rate right is only half of it. The payment timeline decides whether coverage stays in force.
The insignificant shortfall rule. If a payment is short by an insignificant amount, the plan must either accept it as full payment or notify the qualified beneficiary of the deficiency and provide a reasonable period — at least 30 days — to pay the difference. An amount is insignificant if it is no greater than [VERIFY: the lesser of $50 or 10% of the required amount — confirm against current IRS guidance]. You cannot terminate coverage for a small underpayment without giving notice and a cure period.
Timeliness is measured by the postmark, not the receipt date, for payments sent by mail.
No payment in advance may be required. A plan cannot require a qualified beneficiary to pay a premium before the 45-day initial deadline or before the start of the coverage period.
Federal subsidies. There is no standing federal COBRA premium subsidy. The temporary 100 percent subsidy created under the American Rescue Plan Act expired in 2021, and the earlier ARRA subsidy expired in 2010. [VERIFY: confirm no new federal subsidy program has been enacted before publishing.] If a client or employee asks about "the COBRA subsidy," they are almost certainly referring to an expired program.
Employer-paid COBRA in severance. Employers commonly agree to pay some months of COBRA premiums as part of a separation package. Two cautions: this does not extend the maximum coverage period, and the tax treatment depends on how it is structured — direct payment of premiums for a former employee is generally taxable income unless structured through a compliant arrangement. Coordinate with tax counsel.
HSA funds. COBRA premiums are one of the narrow categories of insurance premiums that can be paid tax-free from a Health Savings Account. This is a genuinely useful option for a departing employee with an HSA balance and one that most employees do not know about.
Marketplace coverage. Loss of group coverage is a qualifying event for a special enrollment period on the individual marketplace, and marketplace coverage with a premium tax credit is very often cheaper than COBRA. Employers should note this neutrally in the election materials. Important nuance: an individual who elects COBRA is not locked out forever — they may switch during the annual open enrollment period, or when COBRA is exhausted (which is itself a special enrollment trigger). Voluntarily dropping COBRA mid-period, however, is generally not a special enrollment trigger.
State mini-COBRA. For employers below the 20-employee federal threshold, state continuation laws apply, and several permit a higher administrative loading than 102 percent. Check the applicable state rule rather than assuming the federal ceiling.
A qualified beneficiary elects family coverage on a self-funded plan following a termination.
Actuarially determined monthly cost, family tier $1,612.00
Standard COBRA rate (102%) $1,644.24 → months 1–18
SSA later determines disability began in month 2.
Notice given within 60 days of determination and before month 18 ends. Extension granted.
Disability extension rate (150%) $2,418.00 → months 19–29
Note that the 150 percent rate does not apply retroactively to months 1–18, and that the extension caps at 29 months total, not 29 additional months.
102 percent of the applicable premium in ordinary circumstances, and up to 150 percent during months 19 through 29 of an 11-month disability extension.
Yes. The applicable premium is the total cost of coverage for similarly situated non-COBRA beneficiaries, including both the employer and employee shares. That is why the COBRA rate is dramatically higher than what the employee paid while active.
45 days from the date of the COBRA election. Subsequent premiums have a grace period of at least 30 days from the due date.
Not immediately. If the shortfall is insignificant, you must either accept it as payment in full or notify the beneficiary and allow a reasonable period — at least 30 days — to make up the difference.
Generally no. The rate is fixed for the 12-month determination period, with three exceptions: an increase up to the maximum where you previously charged less, the 150 percent disability rate taking effect, and a change in the coverage the beneficiary elected.
No. The ARPA subsidy ended in 2021 and the earlier ARRA subsidy ended in 2010. Employees asking about a subsidy are usually referring to one of these expired programs.
Set your determination period to match the plan year. Build the applicable premium from total plan cost by tier, not from the employee's payroll deduction. Document the method — actuarial or past-cost — and confirm the past-cost method still qualifies before relying on it. Then hold the rate for the full period, honor the 45-day and 30-day payment windows, and never terminate for an insignificant shortfall without notice.
For deeper instruction, explore our COBRA Training Courses, review the COBRA FAQs and Glossary of COBRA Terms, or work through the COBRA Compliance Checklist.
Recommended Online Training Courses
1-770-410-1219
support@HRTrainingCenter.com
770-410-1219
