Tax Credit Phase-Outs for Married Couples Filing Jointly

Federal tax credit phase-outs for married couples filing jointly kick in at wildly different income levels: the Earned Income Tax Credit starts shrinking at $31,160, education credits begin dropping at $160,000, and the Child Tax Credit holds steady until joint income reaches $400,000. Every one of these thresholds keys off modified adjusted gross income (MAGI), and crossing a line by even a few thousand dollars can cost hundreds or thousands in lost credits.

Joint-Filer Phase-Out Thresholds at a Glance

Each credit has its own starting point, its own endpoint, and its own math for the reduction in between. Here is where each one begins to fade and where it disappears entirely for married couples filing jointly:

Earned Income Tax Credit, no children: phase-out begins at $18,140, ends at $26,820.
Earned Income Tax Credit, one child: begins at $31,160, ends at $58,863.
Earned Income Tax Credit, two children: begins at $31,160, ends at $65,899.
Earned Income Tax Credit, three or more children: begins at $31,160, ends at $70,244.
Saver’s Credit: 50% rate up to $48,500 AGI, 20% up to $52,500, 10% up to $80,500, then gone.
Education credits (American Opportunity and Lifetime Learning): begin at $160,000 MAGI, end at $180,000.
Adoption Credit: begins at $265,080 MAGI, ends at $305,080.
Premium Tax Credit: hard cliff at 400% of the federal poverty line starting in 2026.
Child Tax Credit and Credit for Other Dependents: begin at $400,000 MAGI, then shrink $50 per $1,000 of excess income.
Child and Dependent Care Credit: no full phase-out; the percentage of expenses you can claim drops from 35% to a 20% floor at AGI above $43,000.

Why MAGI Runs Every Phase-Out

Nearly every phase-out is measured against modified adjusted gross income. That starts with adjusted gross income from line 11 of Form 1040, which already reflects your total income minus the Schedule 1 adjustments like student loan interest, educator expenses, and deductible IRA contributions.¹ MAGI then adds certain items back, and the add-backs differ by credit.² For the Child Tax Credit, MAGI is AGI plus any foreign earned income you excluded.³ For education credits, the add-backs include foreign earned income exclusions, foreign housing exclusions, and income from certain U.S. territories.

The practical upshot: because MAGI builds on AGI, anything that reduces AGI reduces MAGI too. Pre-tax 401(k) and 403(b) deferrals never appear in AGI in the first place, which is why they show up again in the strategy section below.

Child Tax Credit and Credit for Other Dependents

The Child Tax Credit is worth up to $2,200 per qualifying child under 17 for 2025, indexed for inflation going forward.⁴ Joint filers get the full amount up to $400,000 MAGI. Above that, the credit drops $50 for every $1,000 of excess income, or any fraction of $1,000.³

An example makes the math concrete. A couple with $420,000 MAGI is $20,000 over the line. That’s 20 increments of $1,000, each cutting $50 from the credit, for a $1,000 reduction per child. With two qualifying children, they lose $2,000. The credit hits zero for a two-child household around $488,000 MAGI.

The Credit for Other Dependents uses the same $400,000 threshold and the same $50-per-$1,000 formula, but the maximum is only $500 per qualifying dependent. Because the credit is smaller, it disappears faster: at $410,000 MAGI, a couple with one qualifying dependent loses the full $500.⁴

Earned Income Tax Credit

The EITC is the most income-sensitive credit on a joint return, and it phases out at very low income levels. For 2026:⁵

No qualifying children: maximum credit $664; phase-out $18,140 to $26,820.
One qualifying child: maximum credit $4,427; phase-out $31,160 to $58,863.
Two qualifying children: maximum credit $7,316; phase-out $31,160 to $65,899.
Three or more qualifying children: maximum credit $8,231; phase-out $31,160 to $70,244.

Joint filers get a $7,270 bump in the phase-out starting point compared to single filers, which the statute uses to soften the marriage penalty.⁶ Two other details catch people off guard. The IRS compares both earned income and AGI and uses whichever produces the smaller credit. And investment income above $12,200 in 2026 disqualifies you entirely, no matter what your earned income looks like.⁵

Education Credits

The American Opportunity Tax Credit and the Lifetime Learning Credit share the same joint phase-out window: $160,000 to $180,000 MAGI.⁷⁸ The reduction inside that $20,000 range is linear. At $170,000 MAGI — the midpoint — a couple receives half the credit they’d otherwise qualify for. The American Opportunity Credit maxes at $2,500 per eligible student, so the midpoint couple would get $1,250. The Lifetime Learning Credit maxes at $2,000 per return regardless of the number of students, so the same couple would get $1,000.⁹

A filing-status trap sits alongside this phase-out. If either spouse files as married filing separately, neither can claim either education credit.⁹ Filing separately sometimes helps with income-driven student loan repayment, but it kills these credits outright.

Saver’s Credit for Retirement Contributions

The Retirement Savings Contributions Credit doesn’t phase out gradually. It drops in steps based on AGI. For 2026, married couples filing jointly face these tiers:

AGI up to $48,500: 50% of eligible contributions.
AGI $48,501 to $52,500: 20% of eligible contributions.
AGI $52,501 to $80,500: 10% of eligible contributions.
AGI above $80,500: no credit.

Eligible contributions are capped at $2,000 per spouse ($4,000 total), so the largest possible credit is $2,000, available only in the 50% tier. Because the cutoffs are low and the drops are steep, a modest raise can quietly eliminate the credit without any warning on a couple’s return. The credit is nonrefundable, so it can only reduce tax to zero.

Adoption Credit

The adoption credit is worth up to $17,670 per eligible child for 2026 and covers qualified expenses like court costs, attorney fees, and travel. For adoptions of children with special needs, the full credit applies regardless of actual expenses.⁵

The phase-out runs from $265,080 to $305,080 MAGI, a $40,000 window with a linear reduction. A couple at $285,080 MAGI loses half the credit. The credit is nonrefundable, but any unused portion carries forward for up to five years, which matters because the amount is large enough that many families can’t absorb it in a single year.

Premium Tax Credit

For couples buying coverage through the marketplace, the Premium Tax Credit subsidizes monthly premiums for households with income between 100% and 400% of the federal poverty line.¹⁰ From 2021 through 2025, Congress removed the 400% cap. That expansion has expired. Starting in 2026, one dollar over 400% of the poverty line drops the credit to zero. There’s no gradient at the boundary.

The temporary caps on repayment of advance premium tax credits have also expired. If you received advance payments during the year and your actual income comes in higher than estimated, you must repay the full excess at filing time.¹⁰

Child and Dependent Care Credit

This credit never fully phases out. It slides on a percentage scale that determines how much of your qualifying care expenses you can claim. At AGI of $15,000 or less, the rate is 35%. It drops one point for every $2,000 of additional income until it hits a floor of 20% at AGI above $43,000.¹¹ For most joint filers, 20% is the operative rate. Qualifying expenses are capped at $3,000 for one dependent or $6,000 for two or more, translating at the 20% floor to a maximum credit of $600 or $1,200. A couple at $500,000 gets the same 20% as a couple at $50,000. The credit is nonrefundable.

How to Stay Below the Thresholds

Because MAGI builds on AGI, the strongest lever is reducing AGI. For 2026, the 401(k) contribution limit is $24,500 per person.¹² If both spouses max out, that’s $49,000 that never lands in AGI. For a couple near the EITC or Saver’s Credit thresholds, even smaller pre-tax contributions can flip a credit back on.

Health Savings Account contributions do the same job if you carry a high-deductible health plan. Traditional IRA contributions can also reduce AGI, though if either spouse is covered by a workplace retirement plan, the IRA deduction itself has income-based limits that can dilute the benefit.²

Timing matters too. If one spouse expects a bonus or stock vesting, bunching that income into a year when you’re clear of any threshold, or pushing it into January, can preserve a credit. This is especially valuable around the education credit range, where a $20,000 window separates the full credit from nothing.

What Happens If You Claim a Credit You’ve Phased Out Of

Claiming a credit above your phase-out creates an underpayment. At a minimum, you’ll owe the credit back plus interest running from the original due date. If the underpayment exceeds the greater of $5,000 or 10% of the tax that should have been on your return, the IRS can add a 20% accuracy-related penalty on top.¹³

This usually isn’t fraud. It’s a couple whose income fluctuated, or who filed on estimates without rechecking a threshold. A freelancer with an unexpectedly strong year, or a spouse who started a new job mid-year, can slip over a line without noticing. The IRS matches W-2s, 1099s, and other income documents against your return, and credits claimed above the income allowance are among the easier discrepancies to catch. Running the MAGI numbers before you file is the cheapest way to avoid a notice later.

1
Internal Revenue Service. Definition of Adjusted Gross Income
2
Internal Revenue Service. Modified Adjusted Gross Income
3
Office of the Law Revision Counsel. 26 U.S. Code 24 – Child Tax Credit
4
Internal Revenue Service. Child Tax Credit
5
Internal Revenue Service. Rev. Proc. 2025-32
6
Office of the Law Revision Counsel. 26 USC 32 – Earned Income
7
Internal Revenue Service. American Opportunity Tax Credit
8
Internal Revenue Service. Lifetime Learning Credit
9
Internal Revenue Service. Education Credits – AOTC and LLC
10
Internal Revenue Service. Questions and Answers on the Premium Tax Credit
11
Internal Revenue Service. Publication 503 – Child and Dependent Care Expenses
12
Internal Revenue Service. 401(k) Limit Increases to $24,500 for 2026, IRA Limit Increases to $7,500
13
Internal Revenue Service. Accuracy-Related Penalty