Your health insurance ends the moment you leave. Here's what happens next.

Your employer plan terminates on a specific date. You'll be uninsured unless something else is in place. The timeline is tight, the deadlines are real, and missing them costs money.

Here's the sequence.

Day zero: coverage ends

Most employer plans terminate on the last day of the month you quit. Some end the same day you leave. Confirm the exact date with HR before you quit. Not optional, but knowing it kills surprises.

Starting Day 1 post-quit, you're uninsured unless you've already enrolled elsewhere.

Days one through 60: COBRA lives retroactively

COBRA lets you keep your employer plan for up to 18 months. The price: you pay the full premium (employer contribution plus employee contribution) plus 2% administration.

You have 60 days to elect. The key: you don't elect immediately. Coverage goes retroactive. Elect on day 45, coverage kicks back to day 1. Don't elect by day 60, you're locked out permanently.

Single coverage costs around $746/month in 2025. Family plans run roughly $2,131/month. These vary by employer and location.

Days one through 60: ACA special enrollment

Losing employer coverage is a qualifying life event. You get 60 days to enroll in ACA marketplace plans (healthcare.gov or your state exchange). This is outside the normal open enrollment window.

ACA advantage: potentially much cheaper than COBRA. Your income for subsidy purposes is the actual earned income that year, not your savings. Quit March 15 and live off savings, your 2025 income is just 2.5 months of salary, putting you well below the 400% federal poverty line threshold and qualifying you for heavy subsidies.

At 200% FPL ($26,200 single in 2025), you might pay $0 to $50/month. At 400% FPL ($52,400), subsidies disappear entirely.

The network cost: ACA plans have different networks than your employer plan. You might need different doctors or specialists. Solve this before you quit if you're in ongoing treatment.

COBRA versus ACA tradeoff

Choose COBRA if: You need to keep the same doctors and network. You expect significant medical expenses. You're employed again in 3 to 6 months and can absorb the premium.

Choose ACA if: You're healthy and your income will be low (qualifying for subsidies). You can switch doctors. You want to minimize immediate post-quit premiums.

The math: COBRA at $746/month for six months equals $4,476. ACA with subsidies at 200% FPL might run $200 to $400/month, totaling $1,200 to $2,400 for six months. The gap is huge if you qualify.

Timing your income to control ACA costs

Your ACA premium is based on projected yearly income. Quit April 1, your annual income is roughly $15,000 (three months earned). That puts you well below 400% FPL.

You can plan this strategically. Substantial savings? Quit early in the year rather than late. Quit January 1, your annual income might be $0, qualifying you for maximum subsidies (sometimes $0 or near-zero premiums depending on your state).

Report income accurately. Underreporting means you owe back subsidies plus penalties. But planning your quit date strategically around the calendar is completely legal.

Other coverage paths

Short-term health insurance: Cheap. $50 to $150/month. But limited. Excludes pre-existing conditions, covers preventive care differently, has annual caps. Use only as a true temporary bridge if you're healthy.

Spouse's plan: If your spouse is employed, you can add yourself within 30 days of losing coverage. No special enrollment period required. Employer plans allow dependent additions as a life event. Often cheaper than COBRA or ACA if the plan is solid.

Medicaid: Below 138% FPL (roughly $18,100 single), you might qualify depending on your state. Medicaid covers nearly everything at minimal or zero cost. State rules vary wildly. Check your specific state before planning this as your strategy.

How to actually decide

The steps:

• Before quitting: Get your employer's COBRA premium estimate from HR.
• Before quitting: Check healthcare.gov for estimated ACA costs at your projected post-quit income.
• Day 1 after quitting: You've got 60 days for both COBRA and ACA decisions.
• Day 30: Decide. Don't wait until day 55 to panic.
• Days 45 to 60: Lock in whichever you chose. If uncertain, elect COBRA as the safe play, then switch to ACA if the math works.

This is not financial advice. Health insurance rules vary by state and shift every year. Verify everything on healthcare.gov or your state's exchange before you quit.