Jim Callahan is 45, a self-employed plumber in Columbus, Ohio, and since he has no employer health plan, he buys insurance the hard way: a marketplace plan, full price, every month, no premium tax credit, the whole premium out of his own pocket. In late September 2026, a letter from the Treasury arrived at his house saying he was owed $500. Jim’s first thought was the right one — this looks exactly like a scam. His second thought should be yours too: check before you toss it. Because this check is real, it is already in the mail, and around 950,000 people are getting one.

This guide covers who qualifies, when the money arrives, and how the fraudsters already circling it operate — plus the other date that matters for your wallet: 2027 open enrollment, with premiums surging. (We are an independent guide, not the government. When in doubt about anything here, HealthCare.gov is the official word.)

The $500 check: the facts, plainly

The announcement came on September 10, 2026, and the first checks were mailed on September 30. About 950,000 recipients are covered, across the 30 states that use the federal HealthCare.gov exchange — Jim’s Ohio is one of them.

Do you qualify? The test is simple: you were enrolled in a marketplace plan and received no premium tax credit — you paid the full premium yourself, like Jim does every month. The money is described as surplus marketplace user fees being returned to the people who paid them. In other words: the exchange collected more in fees than it needed, and this is your share coming back.

Here is the best part: it arrives automatically, by mail. There is nothing to sign up for, no form to fill in, and no website to “claim” it on. If someone tells you otherwise — if anyone asks you to register, verify, or unlock your check — they are not helping you. They are the reason the next section exists.

Scam warnings — read this part twice

Wherever free money appears, scammers follow, and they did not waste time. Fraudsters are already calling and texting about “releasing” the check for a processing fee, or asking for bank details to “deposit” it directly. Some sound impressively official. None of them are.

The rule is absolute: the Treasury already has everything it needs, because the check is automatic. Never pay money — not a fee, not a deposit, not “postage” — and never share your Social Security or bank numbers with anyone who contacts you about this check. If a call leaves you unsure, hang up and call HealthCare.gov directly through their published number. Jim got two such texts in October. He deleted both.

2027 open enrollment: the other big date

Since you are thinking about health costs anyway, here is the date that will matter more than the $500 in the long run. Open enrollment runs November 1, 2026 to January 15, 2027 in most states — enroll by December 15 for coverage that starts January 1, 2027. Miss the window and you are generally locked out until the next one, barring a qualifying life event.

Brace yourself for the sticker shock: premiums jumped roughly 26% on average after the enhanced subsidies expired — one of the steepest increases since the ACA began. For someone like Jim, paying full price already, that is a serious hit. Comparing plans from November 1 can still save real money, so shop around even if you plan to stay put — insurers reshuffle their offerings every year.

One more sting to know about before you pick a plan: households above 400% of the federal poverty level get no premium assistance at all. The “subsidy cliff” now bites harder than ever — earn a dollar over the line and the help vanishes entirely. Know where you stand on that line before you choose, because the difference can be thousands of dollars a year.

What to do now

Keep it simple. If you paid full price for a HealthCare.gov marketplace plan, watch your mailbox — the $500 comes to you, no action needed. If anyone contacts you about it first, assume fraud until proven otherwise. Then put November 1 on your calendar: open enrollment is where the real money is won or lost this year, and an hour of plan comparison could be worth far more than $500.

And remember the standing rule for this site: we explain, we estimate, we warn — but we are not the government. For anything that affects your coverage or your money, HealthCare.gov and your state’s official exchange are the final word.