The ACA tax credit lowers what you pay for health insurance each month
The Advanced Premium Tax Credit (APTC) is money the federal government sends directly to your insurance company to reduce your monthly premium. You do not pay it back at tax time — it goes straight to lowering your bill right now. The amount depends on your household income, family size, and the cost of the cheapest plan available where you live.
The credit is "advanced" because you receive it in advance of filing taxes. When you file your return the following year, you reconcile what you received against what you were actually may have access to to based on your final income. If you received more than you should have, you may owe some back. If you received less, you get the difference as a refund.
Key Takeaways
- The ACA tax credit pays your insurance company directly each month, not you — it reduces your premium before you see the bill.
- The credit amount is based on your household income and family size compared to the cost of the second-cheapest silver plan in your area.
- You must report your expected income when you sign up, and you reconcile the actual amount when you file taxes the following year.
- If your income changes during the year, you can update your process and adjust the credit amount when ready.
- You only receive the credit if you buy insurance through the Health Insurance Marketplace during the open enrollment period or a may have access to life event.
How the credit amount is calculated
The government uses a formula that compares your household income to the federal poverty line for your family size. The credit is designed so that your contribution to the second-cheapest silver plan in your area does not exceed a certain percentage of your income. That percentage increases with income — someone earning 150% of the poverty line pays a smaller percentage than someone earning 400% of the poverty line.
The actual dollar amount you receive depends on three things: your reported household income, the number of people in your household, and the price of the second-cheapest silver plan available in your county. If you live in a rural area where plans are expensive, the credit will be larger than in a city where competition keeps prices lower. If your income is lower, the credit is larger. If your family is bigger, the credit is larger.
You do not choose which plan the credit is based on — the government always uses the second-cheapest silver plan as the benchmark. If you pick a cheaper bronze plan, you keep the full credit and pay less. If you pick a more expensive gold or platinum plan, you keep the same credit but pay the difference out of pocket.
When you receive the credit and how it works with your taxes
When you enroll in a plan through the Health Insurance Marketplace, you report your expected household income for that year. The Marketplace calculates your credit and sends it to your insurance company each month. Your premium bill reflects the credit already subtracted — you only pay the reduced amount.
At the end of the year, when you file your tax return, you report what your actual income was. The IRS compares it to what you reported when you signed up. If your actual income was lower than you expected, you may be may have access to to a larger credit, and you receive the difference as a refund. If your actual income was higher, you may have received more credit than you should have, and you owe some back when you file.
This is why reporting your income accurately matters. If you significantly underestimate your income, you could owe a large amount at tax time. If you overestimate, you might not receive the full credit you are may have access to to during the year.
Updating your income if it changes during the year
You do not have to wait until tax time to adjust your credit. If your income changes — you get a raise, lose a job, get married, or have a child — you can update your Marketplace process right away. The new credit amount takes effect the following month.
This is important because it prevents you from owing a large amount at tax time. If you get a significant raise and do not update your process, you will have received too much credit all year and will owe it back. If you lose income and do not update, you will have received too little credit and missed out on money you were may have access to to.
You can update your process by logging into your Marketplace account online or calling the Marketplace customer service line. Have your recent pay stub or other income documentation ready.
Income limits and who can receive the credit
The credit is available to people whose household income falls between 100% and 400% of the federal poverty line. The poverty line changes each year — for 2024, it is roughly $15,000 for a single person and $31,000 for a family of four, though these figures vary by state.
You must also be a U.S. citizen or lawfully present immigrant, have a Social Security number, and not be covered by employer health insurance or Medicare. If your employer offers insurance and you turn it down to buy a Marketplace plan, you generally cannot receive the credit — the government assumes employer coverage is available to you.
You can only receive the credit if you buy your plan through the Health Insurance Marketplace during the annual open enrollment period (usually November through January) or during a may have access to life event like losing a job, getting married, or having a baby.
The difference between the tax credit and other cost-sharing reductions
The tax credit is separate from cost-sharing reductions (CSRs), which lower your deductible, copay, and coinsurance. You receive cost-sharing reductions only if you choose a silver plan and your income is below 250% of the poverty line. The credit itself applies to any metal level plan.
Some people receive both the tax credit and cost-sharing reductions. The credit lowers your monthly bill, and the cost-sharing reductions lower what you pay when you actually use care. They work together to make insurance more affordable.
What happens if you do not reconcile at tax time
If you received the Advanced Premium Tax Credit during the year but do not file a tax return, the IRS will not know what your actual income was. You will not reconcile the credit, which means you will not owe money back if you received too much, but you also will not receive a refund if you received too little.
Even if you do not normally file taxes, you should file a return in the year you received the credit so you can reconcile it accurately. This protects you from overpaying and ensures you receive any refund you are may have access to to.
Frequently Asked Questions
What happens if my income goes up during the year?
Update your Marketplace process as soon as your income changes. Your credit will be recalculated and reduced starting the next month. If you do not update and your income ends up higher than you reported, you will owe back some of the credit when you file taxes. Updating right away prevents a large bill at tax time.
Can I receive the credit if my employer offers health insurance?
No, not usually. If your employer offers coverage that meets minimum standards, you are not may be able to access for the credit even if the premium is expensive. The government considers employer coverage available to you. However, if your employer's plan costs more than a certain percentage of your income, you may be able to use the credit instead.
Do I have to pay back the entire credit if my income is higher than expected?
Not necessarily. The amount you owe back is capped based on your income. If your income is below 400% of the poverty line, the cap is between $300 and $2,500 depending on your income level. Above 400%, there is no cap and you owe back the full difference.
What if I do not know my exact income when I sign up?
Estimate your household income as accurately as you can based on what you expect to earn that year. Include income from all sources — wages, self-employment, investments, and benefits. You can update your estimate later if your situation changes. It is better to report a reasonable estimate than to guess wildly.
Can I use the credit to buy insurance outside the Marketplace?
No. The credit only works with plans bought through the Health Insurance Marketplace during open enrollment or a may have access to life event. If you buy insurance directly from an insurance company or outside the enrollment period, you cannot use the credit.