Short answer: HealthCare.gov opens an income data matching issue (DMI) when the IRS has no income data on file for you, or when the IRS data it does have differs from the income you reported by more than 50% or $12,000, whichever is less. When that happens you have to send in documents proving your income, or your financial help gets adjusted or stops.
What a data matching issue actually is
When you submit a Marketplace application, HealthCare.gov checks what you told it against trusted electronic data sources — the IRS, Social Security, Equifax, and the Department of Homeland Security. When the answer you gave and the data don't line up, the Marketplace doesn't reject you. It gives you conditional eligibility, starts your coverage, and gives you a window to prove the answer you gave. That open item is the data matching issue, also called a DMI or an "inconsistency."
There are several kinds — citizenship, immigration status, incarceration, minimum essential coverage, Social Security number. This article is about the income one.
What triggers an income DMI
- No IRS data at all. Common for people who didn't have to file a return, who are new to the workforce, or who are newly self-employed.
- A gap between your number and the IRS number that is more than 50% or $12,000, whichever is the smaller figure.
- Reporting income in the subsidy range when the data shows you below it. If you attest to income between 100% and 400% of the Federal Poverty Level but the data sources show you under 100% FPL, the Marketplace will ask you to document it.
Things that do not by themselves trigger an income DMI: a routine 10% change from last year, picking a Silver plan with cost-sharing reductions, or forgetting your Social Security number (that last one creates a different kind of DMI).
Why this happens to honest people constantly
The IRS data the Marketplace pulls is usually a year or two old. You are reporting what you expect to earn in a future coverage year. Those two numbers are supposed to be different. A DMI is not an accusation — it's a paperwork step. The people it hits hardest are the self-employed, gig and 1099 workers, anyone who changed jobs, anyone who went from two incomes to one, and anyone whose hours swing seasonally.
How long you have
Income DMIs generally carry a 90-day window from the date on your notice. Citizenship and immigration DMIs get 95 days. Always go by the deadline printed on your Marketplace notice, not by a rule of thumb — and don't wait until the last week, because documents get returned as unreadable more often than you'd think.
What happens if you ignore it
For an income DMI, your coverage does not disappear. What happens is that the Marketplace falls back to the IRS data and recalculates — which usually means your Advance Premium Tax Credit is reduced or removed and any cost-sharing reduction goes away. Your premium jumps to full price on the next billing cycle, and you stay enrolled only if you pay it.
There's a second sting that lands later. If you took APTC all year based on income you never documented, the difference gets reconciled on your tax return. Resolving the DMI up front is far cheaper than repaying a credit in April.
Documents that work
Send the one that best matches how you actually earn money:
- W-2 employee: recent pay stubs, an employer letter stating wage and hours, or last year's W-2
- Self-employed: a signed statement of expected net income for the year, your Schedule C or most recent 1040, 1099s, bookkeeping records, or a profit-and-loss statement
- Retired or on benefits: Social Security award letter, pension or annuity statement
- Unemployed: unemployment benefits letter
- Other: rental income records, alimony documents, or a written explanation if you genuinely have no documentation
Make sure the name on the document matches the name on the application, the document is dated, and every page is included. Screenshots of a bank balance are not income documentation.
How to send them
Log in to HealthCare.gov, open your application, and look for the "Application details" or eligibility results page listing the item that needs confirmation. Upload from there whenever you can — it's faster and gives you a record. Mailing is available but slower, and you need to include the barcode page from the notice so it gets matched to your file.
The mistake to avoid
Don't "fix" a DMI by changing your reported income to match the IRS number when that number isn't true. Your application income should be your honest best estimate of what you'll make in the coverage year. Reporting a lower number to make a subsidy work is exactly what gets reconciled against you at tax time.
We'll handle it with you
If you got a notice and you're not sure what it's asking for or which document to send, don't guess and don't let the clock run. Call us at (312) 726-6565 or email help@ihealthagents.com and we'll look at your application with you and tell you exactly what to upload.
General information about federal Marketplace verification rules, not legal or tax advice.
Comments
0 comments
Please sign in to leave a comment.