This article reflects federal rules and community property state rules as of June 2026 and covers tax year 2025 (the return you file in 2026). Tax law changes — confirm current figures with IRS.gov before you file.
Quick Answer
For tax year 2025, you usually do not split income at all — a surviving spouse can file one joint return covering the whole year, reporting both spouses’ income on it. You only split income onto two separate returns if you choose Married Filing Separately, or if you live in a community property state, where income earned through the date of death is divided 50/50.
When your husband or wife dies, the IRS still treats you as married for that entire tax year. That single rule shapes everything: you can file a final joint Form 1040 that includes all of your income and all of your spouse’s income through the date of death, claim the full $31,500 joint standard deduction, and sign as the surviving spouse. The “split” question only becomes real when you either pick separate returns or you live in one of nine community property states.
The stakes are high and the deadline is the normal one: the final return is due April 15, 2026 for a 2025 death. About 2.8 million Americans die each year, per CDC mortality data, and most leave a surviving spouse or executor who must sort out one last return — often while grieving and under a filing clock.
- 📋 How the “married all year” rule lets you avoid splitting income in most states.
- 🧮 The exact 50/50 income split that community property states force, with worked math.
- ✍️ How to sign, mark “DECEASED,” and use Form 1310 to claim a refund.
- ⚖️ When Married Filing Separately actually beats a joint return, even in grief.
- 🗓️ The Qualifying Surviving Spouse status that keeps joint-level rates for two more years.
The Core Rule: You Are “Married All Year”
The single most important fact is this: for federal income tax, the date of death does not end your marriage for the tax year. The IRS lets you file as Married Filing Jointly (MFJ) for the entire year in which your spouse died, as confirmed in IRS guidance on final returns. This means you report your full-year income and your spouse’s income from January 1 through the date of death on one combined return.
Because of this rule, most surviving spouses never “split” anything. The word “split” worries people because they assume two returns are required — one for the living spouse and one for the deceased. That is a misconception. A joint return is one return that covers both people, so income does not get divided; it gets combined.
The consequence of getting this wrong is real money. If you mistakenly file two separate returns when a joint return would help, you can lose the larger $31,500 joint standard deduction for 2025 and get pushed into higher brackets. The fix is to know your three real choices before you file, and to pick the one that costs you the least tax.
What “Income in the Year of Death” Actually Means
Income in the year of death is everything either spouse received from January 1 until December 31 of that year, with one cut-off: the deceased spouse only reports income received up to and including the date of death. Income paid to the decedent’s name after death — like a final paycheck, a CD that matures, or a dividend posted later — usually belongs on the estate’s return (Form 1041), not the personal return.
This cut-off matters because misplacing income triggers IRS notices. If a 1099 shows interest paid after death under the decedent’s Social Security number, but the money was actually earned post-death, it belongs to the estate or beneficiary, a concept the IRS calls income in respect of a decedent.
The common mistake is dumping every 1099 onto the final 1040. The correct step is to split by date received: pre-death income on the personal return, post-death income on the estate return or the beneficiary’s return.
Which Situation Applies to You?
The right answer depends entirely on three things: your state, your filing choice, and whether you have a dependent child. Use this branch to find your path.
- You live in a regular (common-law) state and want the lowest tax: File one joint return (MFJ). No income splitting. Read the MFJ section below.
- You live in a community property state (AZ, CA, ID, LA, NV, NM, TX, WA, WI): Even a joint return reports combined income, but if you file separately, you must split community income 50/50 through the date of death. Read the community property section.
- You suspect separate returns save tax (high medical bills, student loans, liability concerns): Run the Married Filing Separately math. Read the MFS section.
- Your spouse died and you have a dependent child: You file jointly for the year of death, then may use Qualifying Surviving Spouse for 2026 and 2027. Read the QSS section.
- You are an executor, not the spouse: You may still file a joint return with the surviving spouse, or a separate final return. Read the “Who signs” section.
Option 1: File Jointly (Most Common, Usually Best)
Filing a final joint return is the default choice for most surviving spouses because it keeps the widest brackets and the largest standard deduction. For tax year 2025, the MFJ standard deduction is $31,500, per the IRS inflation adjustments, versus only $15,750 for someone filing separately. There is no income split — both spouses’ income lands on one Form 1040.
The consequence of not choosing this when you qualify is a higher bill. A surviving spouse who files separately instead of jointly can pay hundreds or thousands more on the same income, purely because the brackets are narrower. The benefit also includes a higher capital loss limit and access to credits that phase out faster for separate filers.
A common misconception is that you cannot file jointly because your spouse “isn’t here to sign.” You can. The surviving spouse signs and writes “filing as surviving spouse” in the deceased person’s signature space, as the IRS explains for joint returns. Your next step: gather both spouses’ W-2s and 1099s, separate any post-death income, and file by April 15, 2026.
Worked Example: Joint Return, Regular State
Meet Maria, who lives in Ohio (a common-law state). Her husband David died on August 10, 2025. For 2025, Maria earned $60,000 in wages, and David earned $40,000 before his death, plus $1,000 of interest received before he died.
On a joint return, the math is simple — combine everything:
- Total income: $60,000 + $40,000 + $1,000 = $101,000
- Less 2025 standard deduction (MFJ): −$31,500
- Taxable income: $69,500
Using the 2025 MFJ brackets from the IRS tax tables, Maria’s tax is roughly $7,891. If she had filed separately, she would lose half the standard deduction and jump brackets, costing well over $1,500 more. No income was split — it was combined, and the joint status saved her money.
Option 2: Community Property States — Where Income Truly Splits
In nine states — Arizona, California, Idaho, Louisiana, Nevada, New Mexico, Texas, Washington, and Wisconsin — most income earned during marriage is owned 50/50 by both spouses, per the IRS community property rules. The community ends on the date of death, as stated in the IRS Internal Revenue Manual. This is the one place where “splitting income” is literal and required if you do not file jointly.
If you file a joint return in these states, you still combine all income, so the split is invisible. But if you file separately, each spouse (and the decedent’s final return) must report half of all community income earned through the date of death, plus all of their own separate income. Getting this wrong causes mismatched 1099s and IRS notices, because the income reported won’t match what each Social Security number received.
A frequent misconception is that community property splitting is optional. It is not — it follows state law, and the IRS provides an allocation worksheet in Publication 555. Your next step in these states: decide jointly vs. separately first, and if separately, build the 50/50 worksheet by date.
Worked Example: Community Property, Separate Returns
Meet Carlos and Elena in Texas. Elena died June 30, 2025 — exactly halfway through the year. Carlos earned $80,000 in wages for the full year; Elena earned $50,000 before her death. They choose to file separately (Carlos MFS, plus Elena’s final MFS return).
Community income through June 30 must be split 50/50:
- Carlos’s wages Jan 1–Jun 30: roughly $40,000 → split → $20,000 to each.
- Elena’s wages Jan 1–Jun 30: $50,000 → split → $25,000 to each.
- Carlos’s wages Jul 1–Dec 31 (after death, community ended): $40,000 → all his.
So Elena’s final return reports $20,000 + $25,000 = $45,000. Carlos’s return reports $20,000 + $25,000 + $40,000 = $85,000. This is the true income split — and it only happens because they chose separate returns in a community property state.
Option 3: When Married Filing Separately Wins
Sometimes splitting onto two returns saves money, even though MFJ is usually better. Married Filing Separately (MFS) can help when one spouse has very high medical expenses, because the 7.5% AGI floor for the medical expense deduction is lower on a smaller separate income. It can also protect a survivor from a deceased spouse’s tax liability or audit exposure.
The consequence of ignoring this option is overpaying — or, worse, inheriting joint-and-several liability for an error on the decedent’s income. When you sign a joint return, you are responsible for the whole tax, even on your late spouse’s income. For some survivors, that risk outweighs the joint-rate savings.
The misconception is that MFS is “always worse.” It usually is, but not always. Your next step: have the math run both ways — once MFJ, once MFS — before you commit. Most tax software does this automatically, and the difference is often clear in minutes.
| Filing Choice in Year of Death | Tax Result |
|---|---|
| Joint return in a common-law state | Income combined on one return; full $31,500 standard deduction for 2025; usually lowest tax |
| Separate returns in a community property state | Community income split 50/50 through date of death; each return shows half plus separate income |
| Married Filing Separately for high medical costs | Lower AGI floor may unlock a medical deduction one spouse couldn’t use jointly |
Option 4: The Two Years After — Qualifying Surviving Spouse
The year of death is joint; the next two years may qualify you for Qualifying Surviving Spouse (QSS) status, formerly called qualifying widow(er). For a 2025 death, you file jointly for 2025, then may use QSS for tax years 2026 and 2027 if you have a dependent child and have not remarried, per the IRS filing status rules. QSS gives you the same brackets and standard deduction as MFJ.
The consequence of missing QSS is filing as Single or Head of Household sooner than you had to, which raises your rate and shrinks your deduction. For 2025, QSS carries the same $31,500 standard deduction as MFJ.
The misconception is that QSS lasts forever or applies without a child. It does neither — you must have a dependent child living with you, and it ends after two years. Your next step: confirm you have a qualifying dependent before claiming QSS on your 2026 return.
Named Example: Using QSS
Meet Aisha, whose wife died in 2025 leaving a 9-year-old son. For 2025, Aisha files jointly. For 2026 and 2027, because her son lives with her and she has not remarried, she files as QSS — keeping the wide MFJ brackets. Starting 2028, she switches to Head of Household. Choosing QSS over Single saves her roughly $1,800 a year in those two years on a $90,000 income.
Who Signs, “DECEASED,” and Form 1310
The mechanics of signing the final return trip up many filers. Write “DECEASED,” the deceased person’s name, and the date of death across the top of the final Form 1040, as the IRS instructs. On a joint return, the surviving spouse signs and adds “filing as surviving spouse” in the decedent’s signature area.
If a refund is due and you are not the surviving spouse and not a court-appointed representative, you must attach Form 1310 to claim it. The consequence of skipping it is a stalled or denied refund. Good news: a surviving spouse filing a joint return does not need Form 1310 — the IRS issues the refund automatically based on filing status, per the IRS refund guidance.
The misconception is that everyone needs Form 1310. Surviving spouses and court-appointed executors generally do not. Your next step: if you are a friend or distant relative handling the estate with no court appointment, file Form 1310 with the return to get the refund released.
Does My State Follow These Rules?
Start with federal law, then check your state — states do not always match. Most states accept the same filing status you used federally, so a federal joint return usually means a state joint return. But the nine community property states layer their own 50/50 ownership rules on top, which is why the income split appears there and nowhere else.
The consequence of assuming conformity is a rejected or amended state return. Nine states — including California and Texas — apply community property; the other 41 do not. Some states also have their own estate or inheritance taxes that the federal return ignores entirely.
The misconception is that “no income tax” states like Texas, Nevada, and Washington skip the issue. They have no state income tax, but they are still community property states, so the federal 50/50 split on separate returns still applies. Your next step: confirm your state’s filing-status conformity and any community property rule on your state revenue agency’s site before filing.
Step-by-Step: Filing the Year-of-Death Return
Follow these steps in order to file correctly and on time.
- Confirm the date of death and gather every W-2 and 1099 for both spouses.
- Separate income by date — pre-death income to the personal return, post-death income to the estate (Form 1041) or beneficiary.
- Decide filing status: joint (default), separate, or QSS for later years.
- If in a community property state filing separately, build the 50/50 allocation through the date of death using Publication 555.
- Write “DECEASED,” the name, and date of death at the top of Form 1040.
- Sign as surviving spouse, or attach Form 1310 / court appointment if you are not the spouse.
- File by April 15, 2026 for a 2025 death, or request an extension with Form 4868.
Deadlines, Costs, and Timing
The final return for a 2025 death is due April 15, 2026, the same as any individual return, and you can extend it six months with Form 4868. Missing the deadline triggers failure-to-file penalties of up to 5% of unpaid tax per month, capped at 25%, plus interest.
A simple DIY final return costs nothing beyond software, often $0–$120. A complex estate — with an estate return (Form 1041), community property splitting, or a sizable estate — usually warrants a CPA or tax attorney, typically $300–$1,500 or more. This is educational information, not personal tax advice; for a complicated estate, a licensed professional is worth the cost.
Mistakes to Avoid
- Filing two returns when one joint return is allowed. You lose the $31,500 joint deduction and overpay.
- Putting post-death income on the final 1040. It belongs to the estate; misreporting triggers IRS notices.
- Skipping the 50/50 split in community property states on separate returns. Your 1099 totals won’t match, inviting an audit.
- Forgetting to write “DECEASED” on the return. The IRS may delay processing and the refund.
- Filing Form 1310 as a surviving spouse who doesn’t need it. It can confuse processing and slow your refund.
- Not filing Form 1310 when you do need it. A non-spouse, non-executor loses the refund entirely.
- Assuming QSS applies without a dependent child. Without a qualifying child, you must file Single, paying more.
- Treating a no-income-tax state as a non-community-property state. Texas, Nevada, and Washington still split income 50/50 on separate returns.
- Missing the April 15, 2026 deadline. Penalties and interest stack up fast on any balance due.
Do’s and Don’ts
- Do file jointly in the year of death when it lowers your tax — it usually does, thanks to wider brackets.
- Do separate income by the date received, because post-death income belongs to the estate.
- Do keep the death certificate and any court appointment, since you may need to prove authority.
- Do run both MFJ and MFS math, because separate filing occasionally wins on medical costs.
- Do claim QSS for the next two years if you have a dependent child, to keep joint-level rates.
- Don’t assume you must split income — combining on a joint return is the norm in 41 states.
- Don’t ignore community property law if you live in one of the nine states, because it’s mandatory.
- Don’t forget to sign as “surviving spouse,” or the return may be treated as incomplete.
- Don’t file separately just out of habit, since it often costs hundreds more.
- Don’t miss the filing deadline — request an extension if you need time to settle the estate.
Pros and Cons of Filing Jointly in the Year of Death
- Pro — Largest standard deduction: $31,500 for 2025 versus $15,750 separate, lowering taxable income.
- Pro — Wider tax brackets: Combined income is taxed at lower marginal rates than separate filing.
- Pro — Full access to credits: Many credits phase out faster or vanish for separate filers.
- Pro — One return, less paperwork: You file once instead of two coordinated returns.
- Pro — Automatic refund: A surviving spouse skips Form 1310 entirely.
- Con — Joint-and-several liability: You are responsible for the whole tax, including your late spouse’s income.
- Con — Audit exposure: An error on the decedent’s income becomes your problem too.
- Con — Lost medical deduction: A high-medical spouse may deduct less when income is combined.
- Con — Requires cooperation with the executor: If someone else handles the estate, you must coordinate.
- Con — Not available if you remarry: Marrying again in the same year changes your options.
What to Do Next
Take these steps now, in order, to file an accurate year-of-death return.
- Order several copies of the death certificate and locate any court appointment papers.
- Collect all W-2s and 1099s for both spouses and label each as pre-death or post-death.
- Choose your filing status — start with joint, then test separate if medical bills or liability are concerns.
- If you live in a community property state and file separately, complete the Publication 555 allocation.
- Mark “DECEASED” on Form 1040, sign as surviving spouse, and file by April 15, 2026.
- Call a CPA or estate attorney if the estate is large, generates post-death income, or owes estate tax.
FAQs
Do I have to file separate returns for me and my deceased spouse?
No. For the year of death you can file one joint Form 1040 covering both spouses’ income through the date of death, for tax year 2025. Most survivors file jointly because it lowers tax.
Can I file jointly if my spouse died during the year?
Yes. The IRS treats you as married for the entire year of death, so Married Filing Jointly is allowed for tax year 2025 as long as you have not remarried by year-end.
How is income split in a community property state when a spouse dies?
50/50 through the date of death. In Arizona, California, Idaho, Louisiana, Nevada, New Mexico, Texas, Washington, and Wisconsin, community income earned before death is divided equally if you file separate returns.
What is the standard deduction for a surviving spouse in 2025?
$31,500 for a joint return or Qualifying Surviving Spouse in tax year 2025, the same as Married Filing Jointly. Separate filers get only $15,750.
Who signs the final tax return for a deceased person?
The surviving spouse or appointed representative. On a joint return, the survivor signs and writes “filing as surviving spouse” in the decedent’s signature space for tax year 2025.
Do I need Form 1310 to get my deceased spouse’s refund?
No, not as a surviving spouse. The IRS issues the refund automatically. Form 1310 is required only for a non-spouse, non-court-appointed person claiming the refund.
What income goes on the estate return instead of the final 1040?
Income received after the date of death. Post-death paychecks, interest, and dividends are income in respect of a decedent and belong on Form 1041 or the beneficiary’s return.
What is Qualifying Surviving Spouse status?
A status that keeps MFJ rates for two years. If you have a dependent child and haven’t remarried, you may use it for tax years 2026 and 2027 after a 2025 death.
When is the final return due for someone who died in 2025?
April 15, 2026. It follows the normal individual deadline. You can extend it six months with Form 4868 if you need more time to settle the estate.
Does Married Filing Separately ever save money in the year of death?
Yes, sometimes. It can help when one spouse has high medical bills above the 7.5% AGI floor, or when the survivor wants to avoid liability for the decedent’s income for tax year 2025.
Do no-income-tax states like Texas still split income?
Yes. Texas, Nevada, and Washington have no state income tax but are community property states, so the federal 50/50 split still applies on separate returns through the date of death.
Can I file jointly if I remarry in the same year my spouse died?
No. If you remarry before year-end, you file with your new spouse and file the deceased spouse’s return as Married Filing Separately for that tax year.