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Updated 2026-09-02 · Financial Health · Educational use only ·
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COBRA Insurance Calculator

Total COBRA continuation coverage cost after job loss or qualifying event

Calculate total COBRA continuation health insurance cost after employment ends, given the previous employer's full monthly premium.

What this tool does

This calculator prices continuation health coverage after employment ends or another qualifying event. It adds the employer's former premium share to the employee's own share, applies the administration percentage to that combined figure, and multiplies by the number of months elected. Results show the total across the period, the monthly cost, the combined premium, the administration charge, and the increase against what was previously coming out of pay. That last figure is the one that surprises people: on the loaded inputs someone paying 100 a month moves to 510, an increase of 410. The model covers the United States federal COBRA arrangement, whose rules set the administration ceiling at 102% of the plan cost and the standard duration at 18 months. It assumes the premium and the charge stay constant throughout, and it does not price marketplace alternatives, income-based savings, state continuation schemes, or differences in plan quality between the continued plan and a replacement.

Quick answer: with the default values, the result is $9,180.00 (18-Month COBRA Total). Adjust the values below for your own figures.


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Formula Used
Employer share of the monthly premium before the qualifying event
Employee share of the monthly premium
Administration charge as a percentage of the combined premium
Months of continuation coverage elected
Combined monthly plan premium, the federal cost-to-the-plan basis
Monthly administration charge
Monthly continuation cost
Total across the coverage period, the primary result
Monthly increase against what was previously deducted from pay

Disclaimer

Results are estimates for educational purposes only. They do not constitute financial advice. Consult a qualified professional before making financial decisions.

What COBRA Covers and Costs

COBRA is a United States federal arrangement, so this page prices a specific national programme rather than a general one. The arithmetic underneath is portable to any continuation-coverage scheme that charges the whole premium plus an administration percentage, but the durations, thresholds and terminology below are the American ones.

Continuation coverage lets someone keep an employer health plan after leaving a job, having hours reduced, or another qualifying event. The cost jump is the point: instead of paying only the share deducted from pay, the former employee pays the entire premium, both the employer’s former share and their own, plus an administration charge. Federal guidance sets the ceiling explicitly: premiums cannot exceed 102% of the cost to the plan, and that cost to the plan is defined as both the portion employees paid and any portion the employer paid before the qualifying event. That is where the calculator’s 2% default comes from.

One eligibility limit sits behind all of this. The federal law applies only to group health plans run by employers with 20 or more employees in the prior year, and it does not cover plans sponsored by certain church-related organisations or by some government bodies. Smaller employers fall outside it, which is why several states operate their own continuation schemes.

Typical COBRA Costs

Employers commonly cover the larger share of a premium while someone is employed, so the increase on leaving is steep. On a full premium in the region of 500 to 800 a month for individual cover, the 102% ceiling puts continuation at roughly 510 to 816 a month, and across the standard 18-month period that is about 9,180 to 14,688. Family cover in the region of 1,400 to 2,000 a month works out at roughly 1,428 to 2,040 monthly and 25,704 to 36,720 across 18 months.

Longer periods apply in defined circumstances rather than by choice, and they scale the total directly: at the loaded 510 a month, 29 months comes to 14,790 and 36 months to 18,360. Marketplace coverage bought individually is a separate route, and for someone whose income has just dropped it is frequently cheaper once income-based savings are applied.

Worked Example for Typical Situation

Employer premium 400 a month, employee portion 100 a month, administration 2%, 18 months.

The combined premium is 500, the administration charge is 10, and continuation costs 510 a month, or 9,180 across 18 months. The step up is the figure that surprises people: someone previously paying 100 a month from their pay now pays 510, an increase of 410 a month, or 5.1 times what they were paying. The calculator reports that increase as its own row for exactly that reason.

That total is a budgeting figure rather than an unavoidable one. Pricing it against the alternatives during the election window is what the figure is for, since the arithmetic here deliberately covers only one of the available routes.

What the Calculator Does Not Model

Marketplace premiums and any income-based savings a household qualifies for. Eligibility for the public programme that covers lower-income households. Severance arrangements that sometimes include a period of employer-funded coverage. State continuation schemes, which differ from the federal rules and cover employers below the 20-employee threshold. Differences in plan quality, network and drug coverage between the continued plan and any replacement. Premium changes that take effect during the coverage period rather than at the start.

COBRA Alternatives

Marketplace coverage, where income-based savings often make it the cheaper route after a drop in income, with coverage starting at the beginning of the following month. A spouse or partner’s employer plan, where losing coverage typically opens a special enrolment window. The public programme for lower-income households, where income qualifies. Short-term policies, which cost less but cover less and are not available everywhere. State continuation schemes for employees of smaller employers.

The election window runs 60 days from the qualifying event, and electing later is retroactive to the date coverage was lost, with premiums owed from that date. That is a genuine option to compare during those 60 days, but it also means an election made late arrives with the accumulated premiums due at once.

Example Scenario

Continuation coverage for 18 months at an employer premium of $400 plus an employee portion of $100, with a 2% administration charge, totals $9,180.00, shown alongside the monthly cost, the combined premium and the increase against what was previously deducted from pay.

Inputs

Employer Premium Monthly:$400
Employee Portion Monthly:$100
Admin Fee:2%
Months COBRA:18 months
Expected Result$9,180.00
Expected Result breakdown
Monthly COBRA Cost$510.00
Monthly Increase vs Employer$410.00
Total Monthly Premium$500.00
Admin Fee$10.00

This example uses sample figures for illustration. Adjust the inputs above to match a specific situation and see how the result changes.

Sources & Methodology

Methodology

The calculator adds the employer's former monthly premium share to the employee's own monthly share to give the combined plan premium, applies the administration fee percentage to that combined figure, and multiplies the result by the number of months of coverage elected. It also reports the monthly cost, the combined premium before the charge, the administration amount, and the difference between the new monthly cost and what the employee was previously paying. The structure follows the federal rule that premiums for continuation coverage cannot exceed 102% of the cost to the plan, where cost to the plan is defined as both the portion paid by employees and any portion paid by the employer before the qualifying event, which is why the administration input defaults to 2%. The model assumes a constant premium and a flat administration percentage across the whole period. It does not account for premium changes that take effect during the coverage window, plan or benefit changes that apply to active employees and therefore to continuation participants, marketplace premiums or income-based savings, state continuation schemes with different durations and rules, employer severance arrangements that fund coverage for a period, or differences in network and drug coverage between plans. Results are estimates based on the inputs provided.

Frequently Asked Questions

Is COBRA worth it?
It depends on income and on what the alternatives cost. Marketplace coverage with income-based savings is frequently cheaper for a household whose income has just fallen, since those savings scale with income and a job loss usually reduces it. A spouse or partner's employer plan is often cheaper still where one is available, and losing coverage normally opens a special enrolment window to join it. Continuation tends to win on a narrower basis: keeping the same plan means keeping the same network, the same specialists and the same drug formulary, and where treatment is already underway that continuity can matter more than the premium. The calculator prices only the continuation route, so the comparison has to be assembled from the quoted alternatives alongside it.
How long does COBRA last?
Eighteen months is the standard maximum for the former employee. Two extensions exist. A disability extension can add a further eleven months, to twenty-nine in total, where a qualified beneficiary is determined to be disabled during the first sixty days of coverage and the plan administrator is notified within the required window. A second qualifying event can take a spouse or dependent children to thirty-six months in total, with triggers including the death of the covered employee, divorce or legal separation, the covered employee becoming entitled to the federal programme for older adults, or a dependent child ceasing to qualify as a dependent. The calculator accepts any number of months up to thirty-six, so any of these can be priced directly: at the loaded 510 a month, twenty-nine months is 14,790 and thirty-six months is 18,360.
When does coverage start?
Election runs for sixty days from the qualifying event, and coverage elected within that window is retroactive to the date it was lost, so there is no gap. That cuts both ways. It allows the sixty days to be spent comparing alternatives without losing the option, since electing at the end still restores coverage from the start. It also means an election made late arrives with every month's premium since the qualifying event due together, which makes the first payment considerably larger than a single month. Premiums are owed from the date coverage was lost regardless of when the election is made.
What about state extensions?
The federal rules apply only to employers with twenty or more employees in the prior year, which leaves employees of smaller employers outside them entirely. A number of states operate their own continuation schemes to fill that gap, commonly described as mini-COBRA, and several also extend the duration beyond the federal maximum for employers who are covered. Durations, eligibility and cost rules differ by state and change, so the state insurance regulator is the authority for a specific case rather than any general figure. Where a state scheme applies, the arithmetic on this page still holds: the calculator takes the premium, the administration percentage and the number of months as inputs, so it prices whichever set of rules applies.

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