IRS Form 8958 – If you live in a community property state and file married filing separately (or are a registered domestic partner subject to community property rules), you must properly split income, deductions, credits, and taxes. IRS Form 8958 handles this allocation to ensure each person reports the correct share on their federal return.
This guide covers everything you need—based directly on the latest IRS resources (Form 8958 Rev. November 2023, Publication 555 updated December 2024, and IRS.gov pages reviewed as of January 2026).
What Is IRS Form 8958?
Form 8958, titled Allocation of Tax Amounts Between Certain Individuals in Community Property States, allocates community and separate income, deductions, credits, withholding, and other tax items between:
- Spouses filing married filing separately, or
- Registered domestic partners (RDPs) in states with community property laws.
You attach a completed Form 8958 to each spouse’s or partner’s Form 1040, 1040-SR, or 1040-NR.
Download the official form here: IRS Form 8958 PDF
Purpose: Community property laws treat most income earned during marriage (or registered domestic partnership) as owned 50/50 by both parties. Filing separately requires splitting these amounts evenly for federal tax purposes (with state-specific nuances).
Who Must File Form 8958?
You need Form 8958 if you meet all these conditions:
- You live in (or are domiciled in) a community property state or country.
- You file a separate federal income tax return.
- You or your spouse/RDP are subject to community property laws.
Community property states (per IRS Publication 555):
- Arizona
- California
- Idaho
- Louisiana
- Nevada
- New Mexico
- Texas
- Washington
- Wisconsin
Registered domestic partners in California, Nevada, or Washington must also follow these rules and file as single or head of household (they cannot file as married).
Exceptions: Spouses living apart all year or with a nonresident alien spouse may have different treatment—see Pub. 555 for details.
Community Income vs. Separate Income: Key Rules
Community property laws generally split income earned during the marriage or partnership 50/50.
| Category | Community Income (Split 50/50) | Separate Income (Reported 100% by Owner) |
|---|---|---|
| Wages & Salaries | Pay for services performed by either spouse/RDP during marriage/partnership | Earnings before marriage or after permanent separation (state-dependent) |
| Interest & Dividends | From community property accounts or investments | From separately owned property |
| Self-Employment Income | From business efforts of either spouse/RDP | From sole separate property (except in ID, LA, TX, WI) |
| Pensions & Retirement | Portion earned during marriage/partnership | Portion earned before marriage or from separate IRAs |
| Capital Gains/Losses | From sale of community property | From sale of separate property |
| Rents/Royalties | From community real estate | From separate real estate |
Important notes (from Pub. 555):
- In Idaho, Louisiana, Texas, and Wisconsin, income from most separate property is treated as community income.
- IRAs and similar accounts are always separate property—distributions are taxable only to the owner.
- Deductions for expenses to produce community income are split 50/50.
- Tax withholding on community wages is split 50/50.
Always check your specific state law, as it determines classification.
Step-by-Step: How to Complete IRS Form 8958?
The form uses three columns:
- Column A: Total amount for the item (from all sources).
- Column B: Amount allocated to one spouse/RDP (enter their SSN at the top).
- Column C: Amount allocated to the other spouse/RDP (enter their SSN at the top).
Columns B + C must always equal Column A.
Line-by-Line Instructions (summarized from the form and accessible instructions):
- Wages — List each employer separately. Total wages in A; split 50/50 for community wages.
- Interest Income — List each payer (bank, etc.).
- Dividends — List each payer.
- State Income Tax Refund — List each state.
- Self-Employment Income — List each business or Schedule C.
- Capital Gains and Losses — List each asset or Schedule D item.
- Pension Income — List each payer (1099-R).
- Rents, Royalties, Partnerships, Estates, Trusts — List each Schedule E or K-1 item.
- Deductible Part of Self-Employment Tax
- Self-Employment Tax
- Taxes Withheld — Include federal, state, etc. (split withholding on community income).
- Other Items — Social Security benefits, unemployment, deductions, credits, etc.
Tip: If you run out of lines, attach a statement with the taxpayer’s name and SSN, listing each source, total, and allocations.
Enter your name/SSN and your spouse’s/RDP’s name/SSN at the top. File one Form 8958 with each separate return.
Example Scenario
Married couple in California filing separately:
- Husband earns $80,000 wages (community).
- Wife earns $60,000 wages (community).
- Joint interest income: $2,000 (community).
On Form 8958:
- Line 1 Wages: Total A = $140,000 → B (Husband) = $70,000 → C (Wife) = $70,000
- Line 2 Interest: Total A = $2,000 → B = $1,000 → C = $1,000
Each spouse reports $71,000 wages + $1,000 interest on their Form 1040 (plus any truly separate income).
Common Mistakes to Avoid
- Reporting 100% of community wages on one return.
- Forgetting to split tax withholding on joint/community paychecks.
- Misclassifying pensions or IRA distributions.
- Not attaching Form 8958 to both returns.
- Using joint filing rules when filing separately.
Where to Get Help & Additional Resources?
- Official Form & Instructions: Form 8958 PDF
- Publication 555 – Community Property (free detailed guide): irs.gov/publications/p555
- IRS.gov search: “Form 8958”
- Tax software (TurboTax, H&R Block, TaxAct, etc.) often generates the form automatically for community property states.
- Free help: IRS Taxpayer Assistance Centers or Volunteer Income Tax Assistance (VITA) programs.
Pro Tip: Keep detailed records of all income sources and property ownership. Community property rules can be complex—consult a tax professional familiar with your state if your situation involves significant assets, businesses, or prior separations.
Frequently Asked Questions (FAQ)
Do I need Form 8958 if I file jointly?
No—only for separate returns.
Can registered domestic partners use this form?
Yes, RDPs in community property states must use it to allocate income and attach it to their individual returns.
Is Form 8958 required every year?
Yes, whenever you file separately in a community property state and have community items to allocate.
What if my state doesn’t follow federal community property rules exactly?
State law determines what is community vs. separate, but federal reporting follows the 50/50 split for community items (with Pub. 555 guidance).
Has Form 8958 changed for 2025/2026 tax years?
The current revision (November 2023) remains in use as of early 2026 with no major changes announced. Always download the latest from IRS.gov.
Filing separately in a community property state adds complexity, but Form 8958 makes the allocation clear and compliant. Save the official IRS PDF, review Publication 555, and double-check your allocations before filing.
Need help with a specific line or scenario? Leave a comment or consult a qualified tax advisor. Accurate allocation protects you from IRS notices and ensures you claim the correct credits and deductions.
This article is for informational purposes only and is not tax advice. Rules can change—always verify with the latest IRS publications.