If you have health insurance through the Marketplace (ACA), making a small mistake can cost you hundreds or even thousands of dollars when you file your taxes. Every year, I help clients fix these errors—and many of them could have been avoided. Here are the most common ACA mistakes you should avoid: Not Reporting Income Changes If your income changes during the year and you don’t report it to the Marketplace, you could receive too much subsidy (APTC). Underestimating Your Income Many people ...

Top ACA Marketplace Mistakes That Can Cost You Thousands in 2026