COBRA vs ACA at $42K MAGI: the $0-Premium Silver Plan

The decision: Maya, single, $42,000 projected 2026 MAGI in Ohio

Maya is 38, single, and was laid off from a Columbus, Ohio marketing role in March 2026. Her old employer plan would continue under COBRA at $648/month ($7,776/year) — the full premium plus the 2% administrative load that COBRA permits. She has wages of $14,000 already earned in 2026, a $12,000 severance lump sum, and expects about $16,000 from a contract role for the rest of the year. That projects to roughly $42,000 in MAGI for 2026.

The decision is not close. At $42,000, Maya files single in the 12% federal bracket — the 2026 single 12% bracket runs $11,926 to $48,475, and after the $15,750 standard deduction her taxable income is about $26,250, comfortably inside it. More important for this choice, $42,000 is roughly 263% of the federal poverty level for a household of one (the 2026 FPL is about $15,950, per the HHS poverty guidelines published at aspe.hhs.gov). That income places her in the deep-subsidy zone where the enhanced premium tax credit can zero out her Silver premium.

Her choice: pay $7,776 for COBRA, or pay close to $0 for a marketplace Silver plan. She takes the marketplace plan and keeps the $7,776.

How the premium tax credit zeroes out at this income

The Affordable Care Act’s premium tax credit (IRC §36B) caps what you pay for the second-lowest-cost Silver plan in your rating area — the “benchmark” plan — at a fixed percentage of your income. Under the enhanced credit in effect for 2026, that required-contribution percentage at Maya’s income band is roughly 3–4% of MAGI. On $42,000, that is about $1,260–$1,680 per year, or $105–$140 a month, as the most she would ever owe toward the benchmark.

Here is the lever most people miss: the credit equals the benchmark premium minus your capped contribution. In many rating areas the actual benchmark Silver premium for a healthy 38-year-old is below that cap. When the benchmark premium is lower than your required contribution, the credit covers it entirely and the net premium is $0. Maya can also apply her full credit to a lower-cost Silver or Bronze plan and frequently land at $0 there too.

COBRA gets none of this. COBRA premiums are never subsidized by the premium tax credit — the credit is only available for marketplace coverage. So Maya is comparing a fully subsidized marketplace plan against the unsubsidized full cost of her old group plan.

The second lever: cost-sharing reductions below 250% FPL

Premium is only half the comparison. Silver marketplace plans carry cost-sharing reductions (CSRs) for enrollees under 250% FPL — the government quietly upgrades the plan’s actuarial value, cutting your deductible, copays, and out-of-pocket maximum. CSRs attach to Silver plans only; pick Bronze or Gold and you forfeit them. The tiers (per HealthCare.gov):

At about 263% FPL, Maya is just over the 250% CSR line, so she gets a $0 premium but standard 70% Silver cost-sharing — not the upgraded deductible. This is the single most important number in her file: if she could trim her projected MAGI to under 250% FPL (about $39,875 for one person), she would unlock the 73% CSR tier and a lower deductible. A larger HSA-eligible plan contribution or deferring a chunk of contract income could do it. A few hundred dollars of MAGI is the difference between a CSR Silver plan and a standard one.

The head-to-head math

The premium gap alone is about $7,776 a year in Maya’s favor. Even if her old plan had a slightly lower deductible than the standard Silver plan, she would need to incur thousands of dollars of care before the deductible difference erased a $7,776 premium swing. At $42,000 of income, that is not a real contest.

What most people get wrong about this decision

Three myths cost laid-off workers real money at this income level:

• “Severance disqualifies me from a subsidy.” False at $42,000. There is no income floor that blocks the credit until you hit Medicaid territory, and no cliff until income climbs far above this band. Severance simply raises your MAGI; at $42,000 you are squarely in the subsidy zone. The credit only disappears if severance pushes full-year MAGI high enough that the benchmark premium drops below your required contribution.
• “COBRA is better coverage, so it’s worth the cost.” Usually false. A standard 70% Silver marketplace plan often matches or beats a typical employer plan’s actuarial value, and below 250% FPL the CSR upgrade can make Silver richer than the group plan. You are paying $7,776 for familiarity, not for materially better coverage.
• “I should elect COBRA first and switch later.” Risky. Electing COBRA does not extend your marketplace Special Enrollment Period — the 60-day SEP runs from your loss of job-based coverage. Voluntarily dropping COBRA later may not reopen an SEP, and exhausting COBRA can leave a gap. Enroll in the marketplace inside the original 60-day window.

Projecting MAGI is the whole game

Because subsidies and CSRs reconcile on your tax return via Form 8962, what matters is full-year 2026 MAGI — not your income the month you enroll. Build the projection deliberately:

1. Wages year-to-date from your final pay stub before the layoff.
2. Severance — the full lump sum or salary-continuation total, since it is W-2 wages.
3. Unemployment compensation for the weeks you expect to claim — it counts in MAGI.
4. New-job or self-employment income for the rest of 2026.
5. Subtract above-the-line deductions — notably HSA contributions up to $4,400 self-only in 2026 (IRC §223) if you choose an HSA-eligible high-deductible plan, which directly lowers MAGI.

For Maya, an HSA-eligible Bronze or Silver HDHP plus a $4,400 HSA contribution would cut her MAGI to about $37,600 — under 250% FPL — flipping her into the 73% CSR tier and a lower deductible while keeping her premium near $0. That single move is worth more than anything COBRA offers.

The repayment trap if your income rises

The premium tax credit is reconciled on your 2026 return. You estimate your MAGI when you enroll, the marketplace pays an advance credit (APTC) to the insurer each month, and Form 8962 trues it up at tax time. If your actual MAGI comes in higher than you projected, you repay some of the advance credit — and if it comes in lower, the IRS refunds you the difference.

For someone at Maya’s income, the repayment exposure is capped, not unlimited. The IRS limits APTC repayment for households under 400% FPL on a sliding scale — for a single filer under 200% FPL the cap is a few hundred dollars, rising as income climbs. At 263% FPL her repayment cap is modest, but a large income surprise — a bigger-than-expected severance, a high-paying new job in Q3 — can still cost her at filing. The defense is simple: project conservatively and update HealthCare.gov within 30 days whenever your income changes, so the advance credit tracks reality instead of generating a year-end bill.

This cuts the other way too. If Maya overestimates her 2026 income and her actual MAGI lands lower, she collects the unpaid portion of the credit as a refundable amount on her return. Underestimating income is the expensive direction; overestimating only delays the benefit.

The COBRA election window is a one-way door

You have 60 days from losing job-based coverage to elect COBRA, and a parallel 60-day Special Enrollment Period to enroll in a marketplace plan. These windows run from the same trigger — loss of coverage — and the marketplace SEP does not reset just because you elected COBRA first. That ordering trap snares people who treat COBRA as the default and plan to “switch to the marketplace later.”

The clean sequence at Maya’s income:

1. Do not auto-elect COBRA just because the election packet arrives first. COBRA election is retroactive — you have the full 60 days to decide and can elect later if a gap forces it.
2. Price the marketplace immediately on HealthCare.gov using your projected full-year MAGI, and confirm the $0-premium Silver plan in your rating area.
3. Enroll in the marketplace inside the original 60-day SEP. Once that window closes, your next chance is Open Enrollment unless another qualifying life event occurs.
4. Coordinate effective dates so the marketplace plan starts the first of the month after your group coverage ends, avoiding both a gap and double premiums.

When COBRA actually wins at $42K

COBRA is not always the wrong call — it just rarely wins on the numbers here. Keep COBRA only if:

• You have already met a large deductible this year. Switching plans resets your deductible to $0, so if you are mid-treatment and have paid down a $5,000 deductible, staying put can be worth the premium.
• A specific provider or pending procedure is only in your old network. A surgery scheduled with an out-of-marketplace-network surgeon can justify a few months of COBRA bridge coverage.
• You are within weeks of new employer coverage. A short COBRA bridge avoids the churn of enrolling and disenrolling from a marketplace plan for one month.

None of these apply to Maya. She is healthy, has met no deductible, and her contract role offers no benefits.

The lever: enroll in the marketplace, project MAGI under 250% FPL

At a $42,000 projected 2026 MAGI, the move is to skip COBRA, enroll in a marketplace Silver plan during your 60-day Special Enrollment Period, and pocket roughly $7,776 in premiums you would otherwise hand your old insurer. Then pull the second lever: use an HSA-eligible plan and an HSA contribution to push your full-year MAGI under 250% FPL (about $39,875 for one), which converts a standard Silver plan into a cost-sharing-reduction plan with a lower deductible. Update HealthCare.gov within 30 days of any income change so your advance credit reconciles cleanly on Form 8962 — the only way COBRA beats a near-$0 marketplace plan at this income is if you let an old deductible or a single in-network provider keep you there.