How Much Does Health Insurance Cost in Illinois? (2026)

What coverage actually costs at your age in Illinois

Illinois only just finished the switch. It ran through HealthCare.gov until recently and moved to its own state-based exchange for this plan year, so this is the first cycle where the enrolment site, the deadlines and the customer service are Illinois’s rather than the federal government’s. Auto-renewal still works, but check that your plan mapped across rather than assuming it did.

Because Illinois runs Get Covered Illinois rather than HealthCare.gov, its plan filings are not in the federal county-level file the other states in this series draw on. Rather than publish a local figure I cannot source, here is what is knowable.

Here is the part that is federal law and true in every state. Age rating is capped at 3:1 between 21 and 64, and the curve is not a straight line — nearly flat through your twenties, then accelerating after about 50. Against a 21-year-old on the identical plan, expect roughly 1.1x at 30, 1.3x at 40, 1.9x at 50 and 2.7x at 60. So a premium that jumped without anything else changing is usually just your birthday.

Put plainly: whatever you were paying at 40, budget for roughly half as much again by 50, and double it by 60.

One thing specific to Illinois this year: Cigna is leaving for 2027, though at roughly 2,885 enrollees Illinois is among the lightest-hit states. Which insurers are leaving Illinois for 2027 →

So what should you actually be paying?

The honest answer in Illinois is that it turns on your county, and I would rather pull your real number than have you work from a state average that may look nothing like your ZIP. Send it to me and I will tell you what is filed where you live, at your age, and what it comes to after any credit.

So what could you be paying instead?

Here is the part most people never get told. Marketplace premiums are what the marketplace charges everyone the same at a given age regardless of health, because it is not allowed to ask. If you are in good health, you are subsidising that. Priced on your own health instead, the same coverage usually lands a good deal lower:

• If you are 30, a healthy applicant can often land near $300 a month outside the exchange.
• If you are 40, a healthy applicant can often land near $400 a month outside the exchange.
• If you are 50, a healthy applicant can often land near $500 a month outside the exchange.
• If you are 60, a healthy applicant can often land near $600 a month outside the exchange.

About that second number. It is not a marketplace price and it is not a quote. Plans sold outside the exchange are medically underwritten — you answer health questions, and what you are offered depends on the answers. Someone with a significant health history may be offered a higher rate or declined altogether, these plans do not treat pre-existing conditions the way an ACA plan does, and no premium tax credit applies to them. They are worth pricing if you are healthy and sitting above the subsidy cliff. If you are not healthy, the marketplace figure is your real number and you should stay there — that is exactly what guaranteed issue is for.

If you are self-employed, one line decides everything

Premium tax credits stop at 400% of the federal poverty level — about $62,600 for a single filer. Below that line your price comes down, often sharply. Above it, nothing comes down: that is the real price, and the enhanced rules that used to soften it expired at the end of 2025. There is no taper — one dollar over and the whole credit disappears.

That is why so many 1099 earners and practice owners in Illinois feel they are being overcharged. Often they are simply above the line, and nobody explained the cliff to them.

Check what your credit would be →

If that is more than you want to pay

Above the cliff and in good health, the marketplace is not your only option. There is a medically underwritten market that is not sold on the exchange, and because it prices on you rather than on a filed rate, healthy people frequently do better there than the marketplace will ever offer them. How much better depends on what the health questions turn up — which is why the figure above is a ballpark and your real offer comes back after underwriting, not off a web page. That part is a ten-minute conversation.