How to Find Your Spouse’s AGI on a Joint Tax Return

When you and your spouse file jointly, there is no separate AGI for each of you on the return. Form 1040 reports a single combined Adjusted Gross Income on Line 11, and that one figure belongs to both spouses.1Internal Revenue Service. Adjusted Gross Income So the answer to how to find your spouse’s AGI on a joint tax return depends on what you actually need. If a form or website is asking for your spouse’s prior-year AGI, the number to give them is the same Line 11 amount you’d give for yourself. If you need your spouse’s individual income figure — for a student loan plan, a scholarship application, or a state form — you’ll have to reconstruct it from the W-2s, 1099s, and schedules that fed into the joint return.

What Line 11 Actually Represents on a Joint Return

Line 11 of the current Form 1040 is labeled Adjusted Gross Income, and it works the same way on every return. On a Single or Married Filing Separately return, Line 11 is that one person’s AGI. On a joint return, Line 11 is both incomes added together, minus the above-the-line deductions the IRS allows before taxable income is calculated. Those deductions include traditional IRA contributions, student loan interest, HSA contributions, and the deduction for half of self-employment tax, among others.

The IRS calculates one tax liability for a joint filing and does not track which dollars came from which spouse. That’s why the return itself never breaks AGI out by person.

If You’re Trying to E-File and the Return Was Rejected

This is the most common reason people go looking for a spouse’s AGI, and it has a simple answer that is easy to get wrong. When you e-file, the IRS uses each taxpayer’s prior-year AGI as an electronic signature, and both spouses on a joint return have to enter a matching figure or the return bounces back.2Internal Revenue Service. Validating Your Electronically Filed Tax Return

If last year’s return was a joint return, both of you enter the same number: the combined AGI from Line 11. You do not split it, and you do not try to find your spouse’s “share.” Enter the identical figure for both spouses.

A few situations change this:

When You Genuinely Need One Spouse’s Individual AGI

Some outside applications ask for one person’s income, not the household total. Income-driven student loan repayment plans, certain scholarship forms, and some state tax filings are the usual culprits. Because the joint return doesn’t break AGI out, you have to rebuild your spouse’s figure from the source documents.

Sort the Income by Whose Name Is on It

Pull every income document from the tax year in question and identify the individual on each one. W-2s carry the employee’s name and Social Security number. Forms 1099-INT, 1099-DIV, and 1099-NEC name their recipient. Schedule K-1 identifies the specific partner or shareholder and reports that person’s share of business income.4Internal Revenue Service. Partners Instructions for Schedule K-1 Form 1065 Schedule C income belongs to the spouse who ran the sole proprietorship. For jointly held brokerage accounts, look at the statements to see how gains and losses were allocated between owners.

Add up everything attributable to the spouse in question. That total is their individual gross income.

Subtract Only That Spouse’s Above-the-Line Deductions

From individual gross income, subtract only the above-the-line deductions that clearly belong to that spouse:

  • Traditional IRA contributions are tracked per person even on a joint return.
  • The deduction for half of self-employment tax belongs to the spouse who earned the self-employment income.5Internal Revenue Service. Topic No 554 Self-Employment Tax
  • HSA contributions split according to who contributed to which account.
  • Student loan interest goes with the spouse whose name is on the loan.
  • Self-employment health insurance belongs to the spouse who ran the business and bought the coverage.

The result is your spouse’s reconstructed individual AGI. Don’t guess at items you can’t clearly trace to one person. If a deduction is ambiguous, a tax professional can help sort it out.

Community Property States Change the Math

If you and your spouse live in a community property state and file separately, splitting income is not just a matter of whose name is on the W-2. In Arizona, California, Idaho, Louisiana, Nevada, New Mexico, Texas, Washington, and Wisconsin, most income earned during the marriage is legally owned 50/50 regardless of who earned it, and wages, business profits, and investment income from community property get divided evenly between the two returns.6Internal Revenue Service. Publication 555 (12/2024) Community Property

The treatment of separate property varies. In Arizona, California, Nevada, New Mexico, and Washington, income from separate property stays with the owning spouse. In Idaho, Louisiana, Texas, and Wisconsin, income from most separate property counts as community income and gets split.6Internal Revenue Service. Publication 555 (12/2024) Community Property Separate filers in these states attach Form 8958 to show the division. None of this changes anything on a joint return, but it matters if you’re rebuilding one spouse’s figure for a year they filed separately.

If You Don’t Have a Copy of the Return

When the physical or digital copy is missing, the IRS has a few ways to get you the AGI.

IRS Online Account and Transcripts

The fastest route is the IRS Individual Online Account, which lets you view, print, or download transcripts.7Internal Revenue Service. Get Your Tax Records and Transcripts Setting up the account requires identity verification through ID.me, which involves uploading a government-issued ID and taking a selfie.8Internal Revenue Service. New Identity Verification Process to Access Certain IRS Online Tools and Services

Ask for the Tax Return Transcript. It mirrors the line items from the original return and clearly labels AGI. A Tax Account Transcript also shows AGI and adds account-level detail like payment history; either one gives you the number.

Each spouse can only access their own IRS online account. On a joint return either spouse can pull the transcript, since both are listed on the filing. But if your spouse filed a separate return in some other year, you can’t retrieve that data from your own account.

Transcripts by Mail or Phone

If online verification doesn’t work, request a transcript by mail. The IRS sends it to the address on file, and delivery runs five to ten calendar days.9Internal Revenue Service. Transcript Types for Individuals and Ways to Order Them You can also order by phone at 800-908-9946.

A Certified Copy of the Return

If you need the actual return rather than a transcript, file Form 4506. The fee is $30 per tax year, and processing takes up to 75 calendar days.10Internal Revenue Service. Request for Copy of Tax Return Transcripts are free and accepted by nearly every institution that asks for income verification, so most people don’t need this.

Getting Access to Records When Your Spouse Filed Separately

The IRS treats tax return information as confidential. If you need to access your spouse’s records from a return they filed separately, they have to authorize it, typically with Form 8821, Tax Information Authorization. That form permits a named person to inspect or receive confidential tax information for specified years, but does not let the designee act on the taxpayer’s behalf with the IRS.11Internal Revenue Service. About Form 8821 Tax Information Authorization

This becomes important in divorce or separation. Joint return transcripts remain accessible to either spouse, but data from a return your spouse filed on their own belongs to them.