ACA Premium Tax Credit: Who Qualifies and How It’s Calculated

The ACA Premium Tax Credit is a refundable federal tax credit that lowers the cost of health insurance bought through the Health Insurance Marketplace. You can take it two ways: as monthly advance payments sent directly to your insurer, which cuts your premium bill each month, or as a lump-sum credit when you file your federal tax return.¹ For 2026, qualifying income runs from $15,960 to $63,840 for a single person and from $33,000 to $132,000 for a family of four.²

Who Qualifies

Four conditions must all be met at the same time.³

You buy your plan through the Marketplace. Coverage purchased directly from an insurer outside the federal or state Marketplace does not qualify, even if the plan is otherwise identical.

Your household income is between 100% and 400% of the federal poverty line. For 2026 in the 48 contiguous states, the FPL is $15,960 for a single person and rises by $5,680 for each additional household member.² Household income means the combined Modified Adjusted Gross Income of you, your spouse if filing jointly, and any dependent required to file. MAGI equals your adjusted gross income plus foreign earned income, tax-exempt interest, and the nontaxable portion of Social Security benefits.⁴ For most people, MAGI is simply the AGI from Form 1040.

You don’t have access to other qualifying coverage. You cannot be eligible for Medicare, Medicaid, CHIP, TRICARE, or employer-sponsored insurance that is both affordable and provides minimum value. Employer coverage meets the “minimum value” test if it pays at least 60% of covered medical expenses.⁵ For 2026, it counts as affordable if your share of the cheapest self-only plan is no more than 9.96% of household income.⁶

You file the right way. Married taxpayers must file jointly, with a narrow exception for victims of domestic abuse or spousal abandonment, who can file as married filing separately and still claim the credit.⁷ You must be a U.S. citizen or lawfully present immigrant.

What Changed for 2026

The temporary expansion Congress passed for 2021 through 2025 expired on December 31, 2025.⁸ Three changes hit hardest, and anyone who received the credit in recent years should recheck eligibility before 2026 coverage begins:

The 400% FPL income cap is back. Under the temporary rules, households above 400% could still qualify if premiums ate up too much of their income. For 2026, above 400% FPL means no credit, full stop.⁹
Required contribution percentages are higher. The lowest-income households, which paid nothing under the temporary rules, now pay around 2% of income, and the top of the scale rises to 9.96%.⁶
Repayment caps are eliminated. If your advance payments turn out to be more than you were entitled to, you now owe back every dollar of the excess. No income-based limit.⁹

How the Credit Amount Is Calculated

The idea behind the formula is straightforward. The government sets a maximum share of income you should have to pay for a mid-range plan, then covers the gap between that share and the actual plan cost.

The Benchmark Plan

Every calculation runs off the “benchmark plan,” which is the second-lowest-cost Silver plan available in your area.¹⁰ You don’t have to enroll in it. It just sets the reference price. You can pick any Bronze, Silver, Gold, or Platinum plan, and the credit follows you.

Your Expected Contribution

The applicable percentage table sets how much of your income you’re expected to pay toward the benchmark premium. For 2026:⁶

Below 133% FPL: 2.10% of income
133% to 150% FPL: 3.14% sliding up to 4.19%
150% to 200% FPL: 4.19% sliding up to 6.60%
200% to 250% FPL: 6.60% sliding up to 8.44%
250% to 300% FPL: 8.44% sliding up to 9.96%
300% to 400% FPL: 9.96%

Within each tier the percentage slides on a straight line as income rises. A single person earning $32,000 (about 200% FPL) would be expected to contribute roughly 6.60% of income, or $2,112 per year, toward the benchmark premium. If the benchmark plan costs $6,000 per year, the credit covers the remaining $3,888.

How Your Plan Choice Affects the Credit

The credit is calculated against the benchmark plan but capped at the actual premium of the plan you enroll in.⁸ Pick a Bronze plan that costs less than the benchmark, and the credit covers more of your premium, sometimes all of it. Pick a Gold or Platinum plan that costs more, and the full difference above the benchmark comes out of your pocket.

One boundary worth knowing: insurers can charge tobacco users up to 50% more, and the credit does not cover the surcharge. It’s calculated on the standard premium before any tobacco loading.

Taking the Credit Monthly or at Tax Time

Most people take the credit as advance monthly payments, called the Advance Premium Tax Credit. When you apply through the Marketplace, you provide projected income and household details. The Marketplace estimates your annual credit, divides it into monthly installments, and pays your insurer directly. Your monthly bill reflects only what the credit doesn’t cover.

The risk is the estimate. If your actual income ends up higher than what you projected, you received too much and owe the difference at tax time. If it ends up lower, the difference comes back to you as a refund. With repayment caps gone for 2026, guessing high on income is safer than guessing low.

You can also decline advance payments and claim the full credit on your return. That eliminates repayment risk but means paying the unsubsidized premium every month and waiting for the money at filing time. Few people can carry that.

Reporting Changes During the Year

If you take advance payments, you have to report life changes to the Marketplace as they happen.¹¹ Reportable changes include:

Income shifts — a raise, job loss, new job, or any change to expected annual earnings
Household size changes — birth, adoption, marriage, divorce, or a dependent leaving
New coverage options — an offer of employer insurance, Medicare or Medicaid eligibility, or coverage through a spouse
A move to a different ZIP code or county

Prompt reporting lets the Marketplace adjust your monthly payments so they stay close to what you’re actually entitled to. Skip it, and a mid-year raise means twelve months of overpaid subsidies waiting to be clawed back at filing.

Reconciling on Your Tax Return

Anyone who received advance payments has to reconcile on their federal return using IRS Form 8962.¹² It’s not optional. The form compares what you actually received against what your real year-end income entitles you to.

You need Form 1095-A from the Marketplace to complete it. The form reports your monthly premiums, the benchmark plan premiums, and the advance payments made on your behalf. The Marketplace must furnish it by January 31,¹³ and it’s often available in your Marketplace account by mid-January.¹⁴

Form 8962 produces one of two outcomes:

You received less than you were entitled to. The difference is added as a refundable credit, increasing your refund or lowering your tax bill.
You received more than you were entitled to. The excess is added to your tax liability. For 2026, you owe the full amount with no cap.⁹

Any repayment carries from Form 8962, line 29, to Schedule 2 (Form 1040), line 1a, where it becomes part of your total tax.¹⁵

The stakes near the 400% FPL boundary are worth thinking through. Someone who projects income at 390% FPL and takes advance payments all year, then earns slightly more and lands at 410%, loses the entire credit and owes back every dollar received. Without a cap to soften it, the bill can run into the thousands. Conservative income estimates and mid-year updates are the only real protection.

Skipping Reconciliation

The IRS will not process a return that shows advance payments without Form 8962 attached. And if you fail to reconcile for two consecutive years, your advance payments get cut off for the current coverage year.¹⁶ To restore them, you file the missing returns with Form 8962 for both years and update your Marketplace application. People often discover this when their monthly subsidy suddenly disappears.

When Employer Coverage Blocks the Credit

An offer of employer-sponsored insurance can disqualify you even when a Marketplace plan would be cheaper after subsidies. The rule: if the employer offer is both affordable and provides minimum value, you can’t claim the credit.

For 2026, employer coverage counts as affordable if your share of the cheapest self-only plan is no more than 9.96% of household income.⁶ Above that threshold, you can turn it down and take a Marketplace plan with the credit instead.

Family members get their own affordability test. Since a 2022 rule change, if the lowest-cost family plan an employer offers costs more than 9.96% of household income, the employee’s spouse and dependents can qualify for the credit on their own, even when the employee-only plan is affordable. That closed the so-called family glitch, which had locked dependents out of Marketplace subsidies whenever the employee’s individual premium looked cheap on paper.

When You Can Enroll

You can only sign up for Marketplace coverage, and access the credit, during set windows. The 2026 Open Enrollment Period runs November 1, 2025 through January 15, 2026. Pick a plan by December 15 for a January 1 start; enroll between December 16 and January 15 for coverage beginning February 1.¹⁷ Some state-run Marketplaces set slightly different deadlines.

Outside Open Enrollment, a qualifying life event triggers a Special Enrollment Period. Common ones include losing other coverage (a job-based plan, aging off a parent’s plan at 26, losing Medicaid or CHIP), getting married, having or adopting a child, moving to a new ZIP code or county, becoming a U.S. citizen, or leaving incarceration.¹⁸ Most Special Enrollment windows last 60 days from the event. For loss of Medicaid or CHIP, you get 90 days.

1
Internal Revenue Service. The Premium Tax Credit – The Basics
2
U.S. Department of Health and Human Services. 2026 Poverty Guidelines
3
Internal Revenue Service. Eligibility for the Premium Tax Credit
4
Internal Revenue Service. Modified Adjusted Gross Income
5
Internal Revenue Service. Minimum Value and Affordability
6
Internal Revenue Service. Rev. Proc. 2025-25 – Adjusted Applicable Percentage Table for 2026
7
Internal Revenue Service. Instructions for Form 8962 (2025) – Section: Married Taxpayers
8
Office of the Law Revision Counsel. 26 USC 36B – Refundable Credit for Coverage Under a Qualified Health Plan
9
Internal Revenue Service. Updates to Questions and Answers About the Premium Tax Credit
10
HealthCare.gov. Second Lowest Cost Silver Plan (SLCSP)
11
HealthCare.gov. Which Income and Household Changes to Report
12
Internal Revenue Service. About Form 8962, Premium Tax Credit
13
Internal Revenue Service. Questions and Answers About Health Care Information Forms for Individuals
14
HealthCare.gov. How to Use Form 1095-A
15
Internal Revenue Service. Instructions for Form 8962 (2025)
16
Centers for Medicare & Medicaid Services. Failure to File and Reconcile (FTR) Stop APTC Notice
17
Centers for Medicare & Medicaid Services. Marketplace 2026 Open Enrollment Fact Sheet
18
HealthCare.gov. Special Enrollment Periods