Household income on a tax return is the combined modified adjusted gross income (MAGI) of you and every dependent on your return who is required to file their own federal return. It’s the figure the IRS uses to decide whether you qualify for the Premium Tax Credit that lowers the cost of health insurance bought through the Marketplace, and it’s calculated on Form 8962 rather than pulled from any single line of your 1040.
What Counts as Household Income
The rule comes from 26 U.S.C. ยง 36B. Household income equals your MAGI plus the MAGI of any dependents required to file a return of their own.1Office of the Law Revision Counsel. 26 USC 36B – Refundable Credit for Coverage Under a Qualified Health Plan MAGI here starts with the adjusted gross income from Form 1040 line 11a and then adds back three types of income that are otherwise tax-free:2Internal Revenue Service. Instructions for Form 8962
- Foreign earned income you excluded under the foreign earned income exclusion.
- Tax-exempt interest, such as interest from municipal bonds, reported on Form 1040 line 2a.
- The nontaxable portion of Social Security benefits, meaning the difference between line 6a (total) and line 6b (taxable).
If none of those apply to you, your MAGI and your AGI are the same number. For most wage earners with no foreign income and no Social Security benefits, that’s the case.
The Social Security add-back is the one that catches people off guard. A retiree receiving $24,000 in benefits with only $6,000 showing as taxable on the 1040 has to add the remaining $18,000 back for household income purposes. That can move a household into a higher band of the poverty-level scale and change the credit significantly. Supplemental Security Income is not a Social Security benefit for this rule and stays out entirely.3HealthCare.gov. Modified Adjusted Gross Income (MAGI)
Whose Income Gets Added In
Your tax family is you, your spouse if you file jointly, and everyone you claim as a dependent. A dependent’s MAGI only joins the household total if that dependent is legally required to file a federal return because their income crosses the filing threshold.1Office of the Law Revision Counsel. 26 USC 36B – Refundable Credit for Coverage Under a Qualified Health Plan If your teenager files a return just to claim back withheld taxes but isn’t required to file, their earnings don’t count.2Internal Revenue Service. Instructions for Form 8962
The threshold for dependents isn’t one flat number. It depends on whether the income is earned (wages) or unearned (interest, dividends), and unearned income triggers a filing requirement at a much lower dollar amount than earned income does. Check the filing requirements chart in the Form 1040 instructions before you decide whether a dependent’s income belongs in the total.
What Doesn’t Count
Because household income is built from AGI plus three specific add-backs, anything that isn’t already in AGI and isn’t on that short add-back list stays out. That includes:4HealthCare.gov. What to Include as Income
- Child support you receive.
- Gifts and inheritances.
- Veterans’ disability payments.
- Workers’ compensation benefits.
- Supplemental Security Income.
- Loan proceeds, including student loans.
- Alimony from divorces finalized on or after January 1, 2019.
Income Limits for 2026 Coverage
To qualify for any Premium Tax Credit in 2026, your household income has to fall between 100% and 400% of the federal poverty level.5Internal Revenue Service. Eligibility for the Premium Tax Credit The temporary rule from the Inflation Reduction Act that removed the 400% ceiling expired on January 1, 2026, so the upper cliff is back in place.6Congress.gov. Enhanced Premium Tax Credit and 2026 Exchange Premiums
The 2026 credit uses the 2025 poverty guidelines: $15,650 for one person, $21,150 for a family of two, and $32,150 for a family of four in the 48 contiguous states.7HHS ASPE. 2025 Poverty Guidelines Alaska and Hawaii use higher figures. Four hundred percent of those numbers works out to roughly $62,600 for a single filer and about $128,600 for a family of four. Cross those lines and the credit drops to zero.
Reporting the Number on Form 8962
Household income doesn’t appear on your 1040. You build it in Part I of Form 8962, using two worksheets in the instructions.2Internal Revenue Service. Instructions for Form 8962
- Line 2a: your MAGI, from Worksheet 1-1. Start with AGI, then add tax-exempt interest, any foreign earned income exclusion, and the nontaxable part of your Social Security benefits.
- Line 2b: the combined MAGI of dependents required to file, from Worksheet 1-2.
- Line 3: the sum of 2a and 2b. This is your household income.
- Line 4: your family size.
- Line 5: the federal poverty line amount for that family size, from the tables in the instructions.
The form then converts your income into a percentage of the poverty line and runs it through the applicable percentage table to figure out the credit. If you took advance payments during the year through lower monthly premiums, Parts II and III reconcile what you got with what you were entitled to.
If Your Income Turned Out Higher Than You Estimated
Most people who claim the Premium Tax Credit take it in advance, and the advance is based on the income figure they gave the Marketplace at enrollment. If your actual household income ends the year higher than that estimate, you owe some or all of the excess back at tax time.
For 2026 there is no cap on how much you have to repay. In earlier years, taxpayers below 400% of the poverty level had statutory repayment limits between $375 and $3,225 depending on income and filing status. Those caps are gone starting with tax year 2026, so the full excess gets added to your tax bill.8Internal Revenue Service. Questions and Answers on the Premium Tax Credit A mid-year raise, a capital gain, or a spouse’s unexpected side income can now cost you several thousand dollars with no safety net.
If your income shifts during the year, report the change to your Marketplace so it can adjust your advance payments. That keeps what you receive close to what you actually qualify for and shrinks the reconciliation at tax time.