COBRA Cost Calculator: Find Your Cheapest Health Insurance Bridge to Medicare
Use this guide to understand the assumptions, inputs, results, and next steps behind the calculator.
Losing employer-sponsored health insurance when you retire early can trigger one of the biggest financial shocks of your transition: the COBRA premium. Under the Consolidated Omnibus Budget Reconciliation Act (COBRA), you can continue your exact same health plan, but you're now responsible for 102% of the total premium—your former share, your employer's subsidized share, plus a 2% administrative fee. This can easily mean paying $1,500 to $2,500 per month for family coverage.
This calculator is designed for early retirees who need to bridge the healthcare gap between their retirement date and Medicare eligibility at age 65. It directly compares the high cost of COBRA against potentially cheaper alternatives like an ACA Marketplace plan or a short-term policy, helping you find the most cost-effective strategy for your specific income and timeline. A smart choice here can save you tens of thousands of dollars before you turn 65.
COBRA vs. ACA vs. Short-Term Plans: A Comparison
Choosing your health insurance bridge to Medicare involves a trade-off between cost, coverage quality, and network access. COBRA offers continuity at a high price, while the ACA Marketplace may offer significant savings if your retirement income is modest. Short-term plans are the cheapest but come with major limitations.
| Factor | COBRA Continuation | ACA Marketplace Plan | Short-Term Insurance |
|---|---|---|---|
| Cost | Highest; 102% of full premium | Moderate; can be low with subsidies | Lowest premiums |
| Coverage | Identical to your former employer plan | Comprehensive; must cover essential health benefits | Limited; often excludes prescriptions, mental health, maternity |
| Pre-existing Conditions | Covered | Covered | Not covered |
| Doctor Network | Unchanged; keep your current doctors | Varies by plan; may need to switch doctors | Often very limited; may have no out-of-network coverage |
| Duration Limit | Typically 18 months | No limit; can be renewed annually | Varies by state; often limited to a few months |
| Best For... | Retirees with complex health needs who must keep their current doctors and can afford the high premiums. | Most early retirees, especially those who can manage their income to maximize premium tax credits (subsidies). | Healthy individuals needing temporary, catastrophic-only coverage for a very short period. |
The True Cost of COBRA Continuation
The sticker shock from a COBRA offer is real because for the first time, you see the full, unsubsidized cost of your health insurance. Your employer may have been paying 70-80% of the total premium, a benefit that disappears the moment you leave your job.
Under federal law, your former employer can charge you:
- 100% of the total premium (both the employee's and the employer's share).
- An additional 2% for administrative costs.
For example, if the total monthly premium for your family plan was $2,000 (of which you paid $500 and your employer paid $1,500), your new COBRA premium would be $2,040 per month ($2,000 x 1.02). This represents a 308% increase in your monthly healthcare outlay. While expensive, this cost may be worthwhile for those in the middle of critical treatment who cannot risk switching doctors or insurance networks. The standard maximum coverage period for COBRA is 18 months, which may or may not be long enough to bridge you all the way to Medicare.
How ACA Subsidies Can Make Marketplace Plans More Affordable
For many early retirees, an Affordable Care Act (ACA) Marketplace plan is a far more economical option than COBRA. The key is qualifying for the Premium Tax Credit, a federal subsidy that lowers your monthly premium payments.
Eligibility for these subsidies is based on your household's Modified Adjusted Gross Income (MAGI) and its relation to the Federal Poverty Level (FPL). For 2026, the rules generally cap the amount you pay for a benchmark plan at 8.5% of your household income. If your retirement income is low, your subsidy can be substantial.
For example, a 62-year-old couple with a MAGI of $75,000 might qualify for a subsidy of several hundred dollars per month, making their ACA premium significantly lower than a comparable COBRA plan. Managing your retirement income through strategic withdrawals from different account types (like Roth vs. Traditional IRAs) can directly impact your subsidy amount. You can use a Roth IRA MAGI calculator to see how conversions might affect your income. Understanding the interplay between your withdrawal strategy and healthcare costs is a critical part of planning how long your money will last. See our how long will my money last calculator for a detailed projection.
The Math Behind Your Health Insurance Bridge Costs
The calculator compares your options by projecting the total cost of each path to Medicare. It incorporates premiums, administrative fees, subsidies, and out-of-pocket costs. Here are the core formulas it uses.
The calculator first determines your monthly COBRA premium, including the standard administrative surcharge:
Monthly COBRA Cost = Full Plan Premium × (1 + COBRA Admin Surcharge / 100) + Monthly Out-of-Pocket Estimate
Where:
- Full Plan Premium = The total premium for your health plan, including both your former share and your employer's share.
- COBRA Admin Surcharge = The administrative fee employers can charge, typically 2%.
- Monthly Out-of-Pocket Estimate = Your average monthly spending on copays, deductibles, and prescriptions.
Next, it estimates your subsidized ACA Marketplace premium. This starts by calculating the maximum premium you would be expected to pay based on your income:
Maximum Monthly Premium = (Annual Income × Required Contribution Percent / 100) / 12
The subsidy is the difference between the full cost of a benchmark plan and this maximum amount. Your final cost is then calculated:
Net ACA Monthly Cost = Full ACA Premium - Estimated ACA Subsidy + Monthly Out-of-Pocket Estimate
Where:
- Annual Income = Your Modified Adjusted Gross Income (MAGI) in retirement.
- Required Contribution Percent = A percentage set by the ACA based on your income relative to the Federal Poverty Level.
- Estimated ACA Subsidy = The calculated premium tax credit you may receive.
Planning Your Transition: A Scenario Walkthrough
Consider Sarah, a 62-year-old single executive retiring with a pension and savings. She needs to cover her healthcare for 36 months until she is eligible for Medicare.
- Her Employer Plan: She currently pays $450/month. The total premium is $1,200/month.
- COBRA Offer: Her COBRA premium would be $1,200 x 1.02 = $1,224 per month. Over 18 months (the maximum COBRA duration), this would cost her $22,032. For the remaining 18 months, she would need another plan.
- ACA Marketplace Option: Sarah plans to have a retirement MAGI of $55,000 from pension and IRA withdrawals. A good silver plan on the ACA marketplace in her state costs $950/month before subsidies. Based on her income, she qualifies for a $465/month subsidy. Her net premium would be $485 per month. Over 36 months, this would cost her $17,460.
By choosing the ACA Marketplace plan from the start, Sarah saves $739 per month compared to COBRA. Over the first 18 months alone, her savings total over $13,300. This is a significant amount that can remain invested for her future, reinforcing the importance of comparing all options rather than automatically accepting a COBRA offer. A lower fixed cost like this can greatly improve the sustainability of her retirement withdrawal calculator projections.
Your Guide to the Calculator Inputs
To get the most accurate comparison, you'll need a few key pieces of information. Most of these can be found in your retirement or benefits paperwork from your employer.
- Personal Information: Enter your current age and the age you'll be eligible for Medicare (usually 65). This sets the timeline for your "bridge" period.
- COBRA Coverage: You'll need your current employee premium (what you pay now) and the full COBRA premium. The full premium is often listed on your benefits statement or you can get it from your HR department.
- Alternative Coverage: Estimate the monthly premium for an ACA Marketplace plan in your area by visiting HealthCare.gov. Do the same for a short-term plan if you are considering it.
- Annual Income in Retirement: This is the most critical input for determining ACA subsidies. Enter your expected Modified Adjusted Gross Income (MAGI) for the years before you turn 65. This includes pension payments, IRA withdrawals, capital gains, and other taxable income.
Frequently Asked Questions About COBRA Costs
What is COBRA and how does it work?
COBRA is a federal law that allows employees and their families to temporarily keep their employer-sponsored health coverage after a job loss, reduction in hours, or other qualifying events, including retirement. You elect coverage, and then pay the full premium plus a 2% administrative fee directly to your former employer or their administrator.
Who is eligible to elect COBRA coverage?
You are generally eligible for COBRA if you were covered by a group health plan from an employer with 20 or more employees on the day before a qualifying event occurred. The qualifying event must cause you to lose coverage. For a retiree, the qualifying event is the termination of employment.
Is COBRA always more expensive than an ACA plan?
Usually, but not always. For high-income early retirees who do not qualify for ACA subsidies, a COBRA plan's premium might be competitive with or even cheaper than a gold- or platinum-level ACA plan. The main benefit of COBRA is keeping your existing provider network, which can be invaluable.
Are COBRA premiums tax-deductible?
Yes, you can potentially deduct COBRA premiums. If you itemize deductions, you can deduct total medical expenses (including premiums) that exceed 7.5% of your adjusted gross income (AGI). For self-employed individuals, premiums may be fully deductible as an adjustment to income.
How long can I stay on COBRA?
The maximum coverage period for retirees is typically 18 months. Dependents may be eligible for up to 36 months in certain situations, such as the death or divorce of the covered employee. Once your COBRA term expires, you must find other coverage.
What happens when my 18 months of COBRA run out?
The expiration of your COBRA benefits is a "qualifying life event," which grants you a special enrollment period to sign up for an ACA Marketplace plan. You do not have to wait for the annual open enrollment window.
Can I switch from COBRA to an ACA plan at any time?
No. You can only switch from COBRA to an ACA plan during the annual open enrollment period (typically Nov. 1 to Jan. 15) or if you have a special enrollment period. Voluntarily dropping COBRA outside of open enrollment does not grant you a special enrollment period, so timing is critical.
Does COBRA cover dental and vision?
If you were enrolled in your employer's dental and vision plans, they are typically offered as separate COBRA continuation plans. You can elect to continue medical only, or any combination of medical, dental, and vision that you were previously enrolled in.
Next Steps
Now that you've compared your options, you can build a more resilient healthcare plan for your early retirement years. The savings from choosing the right plan can reduce the overall withdrawal rate needed from your portfolio.
Explore our Health Insurance Bridge Calculator for a broader view of your options. You can also model how different healthcare costs impact your long-term plan with our Safe Withdrawal Rate Calculator or see how this decision fits into your overall retirement needs.
Last updated: July 2026