COBRA vs. ACA at Job Loss: Which Costs Less and When?
By Severance Calculator Editorial · Updated
Situation
Losing a job is one of the most disorienting financial events most adults face, and the health insurance decision that follows is time-sensitive and consequential. Two federal frameworks govern what happens next: COBRA continuation coverage under 29 U.S.C. § 1161 et seq. and the Affordable Care Act's marketplace Special Enrollment Period under 45 C.F.R. § 155.420. Understanding both — and how they interact — is essential to making the right call within the 60-day window.
COBRA, enacted as part of ERISA Title I Part 6 and enforced under IRC § 4980B, entitles employees of most employers with 20 or more workers to continue their group health plan coverage for up to 18 months after termination (or up to 36 months for dependents after qualifying events such as a dependent aging off the plan). The catch: you pay the full group premium plus a 2% administrative surcharge. If your employer was covering $800/month and you were paying $200/month, on COBRA you would now pay $1,020/month. Under the statute, the election period for COBRA is at least 60 days from the later of the qualifying event date or the date you receive the COBRA election notice — so you have time to compare options before committing.
Simultaneously, loss of employer-sponsored minimum essential coverage triggers a 60-day Special Enrollment Period under 45 C.F.R. § 155.420(d)(1). This SEP begins on the date coverage is lost and allows enrollment in a Qualified Health Plan through the marketplace. Crucially: electing COBRA does NOT waive or foreclose the marketplace SEP. You can evaluate COBRA, compare it to marketplace options, and still enroll in marketplace coverage within your 60-day SEP window. The two elections are independent. If you elect COBRA and exhaust it (18 months later), that exhaustion itself triggers a new 60-day marketplace SEP under 45 C.F.R. § 155.420(d)(6).
The financial comparison hinges on your projected MAGI for the rest of the tax year. Job loss usually reduces annual income significantly. If your projected full-year MAGI falls between 100% and 400% of FPL (roughly $15,060 to $60,240 for a single filer using 2025 HHS poverty guidelines for TY2026 calculations), you are potentially eligible for a Premium Tax Credit that can dramatically reduce your marketplace premium. A single 35-year-old earning $30,000 in projected annual income (200% FPL) in a mid-cost market might pay $100-$150/month net after APTC for a Silver plan; the same person paying COBRA might owe $800-$1,200/month. The break-even calculation usually favors the marketplace whenever income will be below 350% FPL for the year.
The network consideration cuts in COBRA's favor: COBRA uses your existing employer group plan, so your doctors, prescriptions, and in-progress treatment courses remain covered without interruption or re-authorization. Marketplace Silver plans have narrower networks in many markets, and switching mid-treatment can create coverage gaps or require prior authorizations. If you have a chronic condition under active treatment with specific specialists, contact those providers before dropping COBRA to verify they are in-network on the marketplace plan you are considering.
For income estimation: the marketplace accepts good-faith projections of annual income under 45 C.F.R. § 155.305(f). If you were laid off in October, your full-year MAGI might be only the wages earned January through October plus any severance. Unemployment insurance (UI) benefits are included in MAGI; severance paid as salary continuation is wages; lump-sum severance may be wages or other income depending on how the employer treats it. Under-projecting MAGI risks repaying APTC at filing; over-projecting forfeits PTC unnecessarily. The safest approach is a conservative (slightly high) MAGI estimate, then updating the Marketplace if income diverges more than 10% from projection.
| Factor | COBRA | ACA Marketplace (Silver) |
|---|---|---|
| Monthly premium (est.) | $900–$1,200 | $100–$200 net after APTC |
| Network | Your existing employer network | Varies by plan — verify in-network providers |
| Subsidy eligibility | None — COBRA disqualifies APTC for same months | Yes — if MAGI 100–400% FPL |
| Out-of-pocket max | Per group plan (often high) | ACA statutory cap; Silver with CSR if <250% FPL |
| Coverage length | Up to 18 months | Until plan year end; renewable annually |
Calculate your cliff
Inputs preset for this scenario; adjust to your specifics.
Your situation
Coverage
Income
You're under the cliff
You are at 160% of the federal poverty level.
- Annual PTC
- $4,331
- $361 / month
- MAGI headroom before cliff
- $37,600
- until you hit 400% FPL
PTC dollar values use a state-level SLCSP estimate; verify your exact second-lowest-cost Silver plan on healthcare.gov for your zip.
Key facts
COBRA and the marketplace SEP are not mutually exclusive — they run concurrently. The 60-day COBRA election window and the 60-day marketplace SEP both begin at job loss. You can evaluate both options side by side and switch without penalty during the overlap period. Once a COBRA election is made you cannot retroactively decline it, but you can prospectively drop COBRA at any time and enroll in marketplace coverage mid-year ONLY if a qualifying SEP event exists. The original SEP from the job loss is your cleanest window.
For most people who will be earning below 250% FPL for the year ($37,650 single filer), the math strongly favors the marketplace: Silver plan Cost-Sharing Reductions kick in below 250% FPL, reducing deductibles and copays on Silver plans in ways that compound the premium subsidy benefit. A Silver plan with enhanced CSR at 200% FPL can have a $350 deductible and modest copays — a package that rivals or beats most employer group plans at a fraction of the COBRA cost.
Unemployment Insurance benefits are ordinary income for federal tax purposes and count toward MAGI under § 36B. A worker who receives $25,000 in wages before layoff and then $12,000 in UI benefits has $37,000 in MAGI — roughly 246% FPL for a single-person household. That places them squarely in CSR-eligible Silver territory. UI recipients are among the clearest beneficiaries of marketplace SEPs.
The 102% COBRA premium ceiling is a statutory cap, not a floor. Some employers charge less than 102% as a retention or goodwill gesture. Always ask HR for the actual COBRA invoice before assuming worst-case cost. Small employers (fewer than 20 employees) are not subject to federal COBRA but may have state continuation coverage laws (mini-COBRA) that vary in duration and cost.
FAQ
- Does electing COBRA prevent me from getting marketplace subsidies?
- For months you are enrolled in COBRA, you are ineligible for APTC on a marketplace plan — you cannot have both simultaneously. But electing COBRA does not close your marketplace SEP. You can drop COBRA and switch to marketplace within the original 60-day SEP window after your job loss, or when COBRA ends (triggering a new SEP). You cannot receive both APTC and COBRA coverage for the same calendar months.
- How do I calculate my projected annual MAGI after losing my job mid-year?
- Take all wages and other income earned before the layoff date, add any severance (usually treated as wages), add projected UI benefits for the rest of the year (UI is included in MAGI), subtract any above-the-line adjustments like deductible IRA contributions or student loan interest. Do not include employer COBRA premium contributions — you pay the full COBRA cost. Report this projected figure to the Marketplace and update it if reality diverges more than about 10%.
- What is the 60-day Marketplace SEP, and when does it start?
- Under 45 C.F.R. § 155.420(d)(1), the SEP begins on the date you lose coverage — the last day your employer plan is in effect. You have 60 days to enroll in a marketplace QHP. Coverage effective date depends on when you enroll within that window. Enroll by the 15th for coverage the 1st of the following month; enroll after the 15th for coverage the 1st of the month after that. The SEP clock does not pause while you deliberate about COBRA.
- Is COBRA ever the right choice even if marketplace is cheaper?
- Yes: if you have a specialist, treatment course, or ongoing prescription that is in-network on your employer plan but not in-network on available marketplace plans; if you expect to resume employment with benefits within 2-3 months and want seamless continuity; or if marketplace plans in your area have limited networks you find unacceptable. Always compare the actual Silver plan in-network provider list before deciding. The premium difference must be weighed against disruption cost.
- What happens if COBRA exhausts after 18 months?
- COBRA exhaustion is itself a qualifying event under 45 C.F.R. § 155.420(d)(6), triggering a new 60-day marketplace SEP. You do not need to wait for open enrollment. If your COBRA ends in June, you can enroll in marketplace coverage July 1 (or later in July/August for coverage August 1 or September 1). At that point, re-assess your current MAGI and subsidy eligibility based on the remaining months of the year.
Primary sources
- IRC § 4980B — COBRA 60-day election period
“the period which...begins not later than the date on which coverage terminates under the plan by reason of a qualifying event”
- 45 C.F.R. § 155.420(d)(1) — SEP for loss of MEC
“Loses minimum essential coverage. The date of the loss of coverage is the last day the consumer would have coverage under his or her previous plan or coverage”
- KFF — Explaining Health Care Reform: Questions About Health Insurance Subsidies
“Have a household income at least equal to the Federal Poverty Level (FPL)”
- IRC § 36B — Applicable taxpayer household income floor
“The term 'applicable taxpayer' means, with respect to any taxable year, a taxpayer whose household income for the taxable year equals or exceeds 100 percent but does not exceed 400 percent of an amount equal to the poverty line for a family of the size involved.”