Your Income Changed Mid-Year: The 30-Day Rule

Thirty days, not sixty

Two clocks get confused constantly, and they do different work.

Sixty days is the window to enroll after a qualifying life event — losing coverage, moving, a birth, a marriage.

Thirty days is the window to report a change when you are already enrolled through NY State of Health. It covers a change in income, a change in household size, and becoming eligible for coverage through a job.

The second one is the one people miss, because nothing visibly breaks when you skip it. The consequence arrives later, on a tax return or in a renewal letter.

What happens if income went up

Premium tax credits are estimates paid in advance on the income you predicted for the year. At tax time the estimate is compared against what you actually earned, and the difference is settled.

Earn more than you predicted and some or all of the extra credit is paid back on the return. A raise in March, unreported, can quietly accumulate nine months of overpaid credit — and it is not forgiven for being an honest mistake.

Reporting it is how you avoid that: the credit is recalculated forward from the change, the monthly premium adjusts, and there is no lump at the end.

There is a second reason to report a raise that has nothing to do with credits. Income moving above a program’s line does not remove coverage instantly, but discovering it at renewal rather than when it happened means a bigger, more abrupt change. How Medicaid renewal works.

What happens if income went down

This is the side that costs people money silently, because nobody chases you to give you more.

Below 200% of the federal poverty level, the Essential Plan costs $0 a month with no deductible. A household paying a marketplace premium after a drop in income is paying for something it could have for free — and the money is not refunded retroactively for the months it did not report.

Lower still and Medicaid applies, also with no enrollment season.

In between, the premium tax credit grows as income falls, so even where the program does not change, the amount does.

Reporting a decrease can move you between programs mid-year, and that handover is the point: Medicaid, the Essential Plan and Child Health Plus have no enrollment season, so there is no waiting for November. The five-question check · The 2026 limits by household size.

The changes worth reporting, in practice

• Starting or losing a job, including a second one
• A raise, a cut, or a change in hours
• Self-employment income that turned out different from the estimate
• Becoming eligible for coverage through an employer
• Someone joining or leaving the household: a birth, a marriage, a divorce, a child moving out
• A change in tax filing status
• A move to a new address
• A change in immigration status

The test is simple: if it would change a line on the application you already filed, it is reportable.

How to do it

If you already missed it

Report it now anyway. The consequence of reporting late is smaller than the consequence of not reporting at all: the credit is corrected going forward, and the overpaid portion is what settles at tax time rather than growing for another six months.

Nothing about reporting a change is a penalty in itself. The penalty is arithmetic, and it accrues while you wait.