CoveragePath guide · Updated 2026-09-17
Why did my ACA subsidy change?
A recurring consumer question is why Marketplace savings can move even when life feels unchanged. The answer usually comes from income, household, benchmark premiums, or eligibility rules.
Your Marketplace premium tax credit is not a fixed coupon. It is calculated from information about your household and income together with the cost of benchmark coverage in your area and the rules that apply for that coverage year.
Quick answer
If your subsidy changed, first verify projected annual household income, household members, access to other coverage, address and the benchmark-plan pricing used for the new year.
What changed after 2025?
The temporary enhanced premium-tax-credit rules that applied through 2025 expired. KFF notes that many consumers consequently received less financial assistance for 2026 or lost eligibility for a premium tax credit. For 2027, the IRS has published a new applicable-percentage table used in premium-tax-credit calculations.
Avoid a tax-time surprise
Update the Marketplace when household or income information materially changes. Advance premium tax credits are reconciled on the federal tax return, so an outdated income estimate can matter later.
Worked example: how the credit is built
The premium tax credit is the cost of the benchmark plan (the second-lowest-cost Silver plan in your area) minus what you are expected to contribute. Your expected contribution is your household income multiplied by an applicable percentage that the IRS publishes each year; the percentage depends on where your income falls relative to the federal poverty level. The numbers below are hypothetical and show only how the pieces interact.
| Illustrative step | Last year | This year |
|---|---|---|
| Benchmark plan premium | $700 per month | $780 per month |
| Household income | $50,000 | $50,000 |
| Applicable percentage (hypothetical) | 4% | 8% |
| Expected contribution per month | $167 | $333 |
| Premium tax credit per month | $533 | $447 |
In this example the credit fell by $86 a month with no change in income, because the benchmark premium and the applicable percentage both moved. That is why a subsidy can change even when your own situation does not. To find your own numbers, use your Marketplace eligibility notice and the IRS applicable-percentage table cited below.
Related on CoveragePath
Sources
CoveragePath provides educational information, not a Marketplace eligibility determination or plan quote. Verify your personal eligibility and final plan prices with the Marketplace.