Foreign Spouse US Tax Treatment
Filing options, §6013(g) elections, QDOT planning, and ITIN requirements for US citizens with non-citizen spouses abroad
Select Your Situation
📄 Married Filing Separately (MFS)
File your US return independently. Write "NRA" (Non-Resident Alien) on the spouse's SSN line if no ITIN. No election required.
How It Works
You file Form 1040 as "Married Filing Separately." Your non-citizen spouse's income is NOT included on your return. You use the MFS standard deduction ($15,000 in 2025) and MFS tax brackets (less favourable).
✅ Pros
- Spouse's foreign income not exposed to US tax
- Simple — no election needed
- Spouse's financial privacy maintained
❌ Cons
- Higher tax rates (MFS brackets worst)
- Can't claim many credits (child/dependent care, education)
- FEIE available for your income only
👫 §6013(g) MFJ Election
Elect to treat your non-citizen spouse as a US resident for the entire tax year — allowing you to file jointly.
The §6013(g) Election
Attach a signed statement to your joint Form 1040 stating: "Under IRC Section 6013(g), [Name, SSN/ITIN] elects to be treated as a US resident for the tax year [year]. Both spouses agree to file a joint return and report worldwide income." The election is permanent until revoked.
✅ Pros
- MFJ tax brackets (lower rates)
- Higher standard deduction ($30,000)
- More credits available
- Both spouses can claim FEIE if both work abroad
❌ Cons
- Spouse's WORLDWIDE income taxable in US
- Spouse needs ITIN (Form W-7)
- More FBAR/FATCA reporting
- Difficult to revoke later
🏠 Head of Household
Qualify as HOH if: (1) you were unmarried or considered unmarried, (2) paid more than half the cost of your home, and (3) have a qualifying child who lived with you more than half the year.
"Considered Unmarried" Test
You're "considered unmarried" for HOH purposes if: you file separately from your spouse, you paid more than half the home costs, your home was the main home of a qualifying child for more than half the year, and you lived apart from your spouse for the last 6 months of the tax year.
🌍 Spouse Treated as Non-Resident Alien (NRA)
If your spouse has no US ties, no US income, and you don't make the §6013(g) election, you file as MFS and your spouse is treated as NRA.
Key Implications
NRA spouses have no US tax obligation unless they have US-source income. They need no ITIN for basic situations. However, marital deductions in estate planning are limited — the unlimited marital deduction does NOT apply to NRA spouses (gift/estate tax).
QDOT — Qualified Domestic Trust
For large estates where you want to leave assets to a non-citizen spouse estate-tax-free, a QDOT can defer estate tax. At least one QDOT trustee must be a US person or US bank. Estate tax is due when distributions are made from the QDOT to the surviving spouse.
Quick Comparison Calculator
Filing Status Comparison
| Feature | MFS | MFJ (§6013g) |
|---|---|---|
| Standard Deduction 2025 | $15,000 | $30,000 |
| Spouse's income taxed in US? | No | Yes (worldwide) |
| ITIN required for spouse? | Not always | Yes |
| Child Tax Credit | Limited | Full $2,000 |
| IRA deduction | Limited | Both spouses |
| Earned Income Credit | No | Possible |
| Additional FBAR/FATCA filing | Spouse's own | Spouse's accounts reported |
| Gift to spouse limit (2025) | $190,000 | $190,000 |
| Marital estate deduction | None | None (still non-citizen) |
Key Issues for Expat Couples
🏦 Spouse's Foreign Bank Accounts
Under MFJ: your spouse's foreign accounts must be reported on YOUR FBAR and potentially Form 8938. Under MFS: only if spouse has US tax obligations. Planning opportunity: keep accounts separate and consider MFS in high-account-value years.
💑 Both Spouses Working Abroad
Under MFJ §6013(g): both spouses can claim the FEIE if they each independently qualify (PPT or BFR). This can exclude up to $260,000 of combined foreign earned income in 2025. Often the most tax-efficient strategy for dual-income expat couples.
📊 Revoking the §6013(g) Election
The MFJ election applies to all subsequent years until revoked. You can revoke by filing as MFS. However, once revoked, neither spouse may make the election again (unless IRS grants permission). Think long-term before making the initial election.
🏡 Estate Planning with Non-Citizen Spouse
The unlimited marital estate deduction REQUIRES the surviving spouse to be a US citizen. Non-citizen surviving spouses can only receive the normal estate tax exemption amount ($13.99M in 2025). Consider QDOT for larger estates. If spouse becomes a US citizen before filing deadline, unlimited deduction applies.