What is my tax filing status?
Updated on: May 05, 2026
Written by: Jeff Patterson
In this article
Your tax filing status is the category you use on your US tax return that determines your tax rates, deductions, and eligibility for credits, and for US expats, it can directly change how much tax you pay.
For US expats, choosing the right status can significantly reduce your US tax bill, especially when factoring in foreign income and a non-US spouse.
This guide walks you through how filing status works, how to choose the most tax-efficient option, and what US expats need to watch out for.
Why filing status matters more for US expats
For taxpayers living in the US, filing status is usually straightforward. For expats, it becomes a planning decision. You’re likely to earn foreign income, rely on tax benefits like the Foreign Earned Income Exclusion and Foreign Tax Credit, and/or be married to a non-US spouse.
According to the Internal Revenue Service (IRS), filing status affects:
- Tax brackets
- Standard deduction
- Credit eligibility
For expats, filing status can also affect how foreign tax credits are claimed and how much US tax they offset.
What is a tax filing status?
A tax filing status is the IRS-defined category that reflects your marital and household situation at the end of the tax year. It determines:
- Your tax rate
- Your standard deduction
- Your eligibility for certain credits
The IRS recognizes five main filing statuses, which apply to all US taxpayers, including those living abroad.
What are the 5 filing statuses?
Here’s a quick breakdown:
|
Filing status |
Who it applies to |
Key benefit |
|
Single |
Unmarried individuals |
Simple, but fewer tax benefits |
|
Married filing jointly (MFJ) |
Married couples filing together |
Lower tax rates, higher deductions |
|
Married filing separately (MFS) |
Married but filing individually |
Simpler for expats with a non-US spouse |
|
Head of household (HOH) |
Unmarried with dependents |
Lower tax rates than single |
|
Qualifying surviving spouse |
Widowed with dependents |
Retains joint filing benefits temporarily |
For most expats, the decision is less about eligibility and more about which option leads to the best tax outcome.
Which IRS filing status is right for me? (step-by-step)
The right filing status is the one that you qualify for under IRS rules and results in the lowest total US tax, not just the biggest refund.
To figure this out, you need to test your situation step by step. Here’s how to choose the right filing status:
Step 1: Confirm your marital status
Your options are based on your status on December 31:
If you’re not married, you can file as:
- Single
- Head of Household (if you qualify)
If you’re married, you can file as:
- Married Filing Jointly (MFJ)
- Married Filing Separately (MFS)
If you’re unmarried, check if Head of Household is possible
Head of Household usually gives a lower tax than Single, but you must meet all of these:
- You paid more than half the cost of your home
- You have a qualifying dependent
- You are considered unmarried
You might qualify as “unmarried” if you did not live with your spouse during the last 6 months of the tax year.
If married, compare MFJ vs MFS
Evaluate your situation using the following:
- Your spouse’s income level
- If your spouse has little or no income, filing jointly may reduce your overall tax liability.
- If your spouse has significant income, especially foreign income, filing jointly may increase your taxable base.
- Your spouse’s tax status
- If your spouse is not a US citizen or Green Card holder, filing jointly typically requires an election to treat them as a US taxpayer.
- This means their worldwide income may need to be reported on your US tax return.
Step 2: Factor in expat tax benefits
Your filing status affects how these work:
While the eligibility criteria and limits for these provisions are fixed, the overall tax outcome may vary depending on your filing status.
Step 3: Compare outcomes before making a selection
A filing status should not be selected based on assumption or convenience. It should be based on a comparison of actual outcomes.
For each option, assess:
- Total tax liability
- Eligibility for credits and deductions
- Reporting obligations, including whether a spouse’s income must be included
The objective is to identify the option that produces the most favorable overall result, taking into account both tax liability and compliance requirements.
You can also use the IRS’s Interactive Tax Assistant to help confirm filing status eligibility, but the tool is designed for taxpayers who were US citizens or resident aliens for the entire tax year. If you are married to a nonresident spouse or have another international-status issue, the tool may not fully cover your situation.
Should US expats file jointly or separately?
Choosing between Married Filing Jointly (MFJ) and Married Filing Separately (MFS) is one of the most important filing status decisions for US expats.
Married filing jointly vs separately
|
Factor |
MFJ |
MFS |
|
Tax rates |
Lower |
Higher |
|
Standard deduction |
Higher |
Lower |
|
Credits |
More available |
Some limited or unavailable |
|
Spouse income reporting |
Generally includes both spouses’ income |
Typically limited to your own income |
|
Complexity |
Higher |
Lower |
Note: If one spouse is a nonresident alien, this usually requires making the election to treat that spouse as a US resident for tax purposes.
Here’s a practical comparison
Married Filing Separately (MFS):
- You report only your own income
- You are generally subject to higher tax rates
- Access to certain credits and deductions is restricted
- Compliance is typically simpler, particularly when your spouse is not a US taxpayer
Married Filing Jointly (MFJ):
- You combine your income with your spouse’s
- You may benefit from lower tax rates and broader access to credits
- You may be required to report your spouse’s worldwide income
- Compliance can be more complex, especially in cross-border situations
Additional consideration for non-US spouses
To file jointly with a spouse who is not a US citizen or Green Card holder, you must elect to treat that spouse as a US taxpayer. This generally means:
- Reporting your spouse’s worldwide income on your US tax return
- Potentially increasing your overall tax liability
This decision extends beyond the current tax year. It can affect your ongoing reporting obligations and should be considered carefully.
Is it better to file as Single or Head of Household?
Head of Household is generally more tax-efficient than filing as Single, but it has stricter eligibility requirements.
|
Feature |
Single |
Head of household |
|
Tax rates |
Higher |
Lower |
|
Standard deduction |
Lower |
Higher |
|
Requirements |
Minimal |
Strict |
How do I qualify for the Head of Household status?
To qualify for Head of Household, you must meet all of the following conditions:
- You paid more than half the cost of maintaining your home
- You have a qualifying dependent
- You are considered unmarried under IRS rules
Important clarification
Many US expats assume they qualify for Head of Household status solely because they have a dependent. However, eligibility depends on meeting all required conditions, particularly the household cost and “considered unmarried” tests.
In practice, a significant number of expats do not meet these requirements and must file as Single instead.
What is the most tax-efficient filing status for US expats?
The most tax-efficient filing status is the one that results in the lowest overall tax liability after applying all relevant exclusions, credits, and deductions.
There is no single filing status that is optimal for all US expats. The most suitable option depends on your specific financial and household circumstances.
While outcomes vary, the following tendencies are commonly observed:
- Single
Typically the simplest option, but it offers fewer tax benefits compared to other statuses - Head of Household (HOH)
Often more favorable than Single, provided you meet the eligibility requirements - Married Filing Jointly (MFJ)
Frequently results in lower tax due to broader access to credits and more favorable tax rates - Married Filing Separately (MFS)
May simplify reporting, particularly with a non-US spouse, but often results in a higher overall tax liability
Does filing status affect the Foreign Earned Income Exclusion?
Yes. Filing status does not change your eligibility or the exclusion limit, but it can change the overall tax result because filing status affects rates, deductions, and how any non-excluded income is taxed.
Each spouse must independently qualify under either the Physical Presence Test or Bona Fide Residence Test. If both spouses qualify, each spouse may claim a separate FEIE.
The Foreign Earned Income Exclusion (FEIE), claimed using Form 2555, allows eligible taxpayers to exclude up to US$130,000 (2025 tax year) of foreign earned income. This amount is indexed annually for inflation.
How filing status affects the outcome
- Married Filing Jointly (MFJ)
Combining both spouses’ income may place you in a different tax bracket, which can affect how any remaining taxable income is calculated - Married Filing Separately (MFS)
Income is reported separately, which avoids combining earnings but often results in less favorable tax rates and limited access to certain benefits - Head of Household (HOH)
May provide more favorable tax rates than Single, potentially reducing the tax applied to income above the exclusion
The FEIE limit remains unchanged regardless of filing status. However, your filing status can significantly influence the amount of tax owed on income that is not excluded.
What filing status should I use if I live abroad with children?
Your filing status depends on your marital status and whether you meet the requirements for Head of Household.
Possible filing options
- If you are unmarried:
You may qualify for Head of Household (HOH) if you meet all eligibility requirements - If you are married:
You will generally choose between Married Filing Jointly (MFJ) and Married Filing Separately (MFS)
Your filing status can directly affect:
- Eligibility for the Child Tax Credit and the Additional Child Tax Credit
- Your overall tax liability
- Access to certain deductions and credits
What happens if I choose the wrong status?
Choosing the wrong filing status can lead to incorrect tax calculations and compliance issues. If your filing status is incorrect, it may result in:
- Paying too much or too little tax
- Losing access to credits or deductions you qualify for
- Triggering IRS notices or corrections
- Delays in processing your return or refund
If the mistake is identified after filing, you can usually fix it by submitting an amended return using Form 1040-X. In most cases, the IRS allows corrections, but fixing errors early helps avoid penalties and additional complexity.
Frequently Asked Questions
Can I file jointly with a non-US spouse?
Yes, but only if you elect to treat your spouse as a US taxpayer. This allows you to file as Married Filing Jointly (MFJ), but it comes with important implications:
- You must report your spouse’s worldwide income
- Your overall tax liability may increase
- Your filing and reporting requirements become more complex
This election is not limited to one year. It generally continues for future tax years unless it is ended or suspended, so it should be considered carefully.
What is the best filing status if my spouse is not a US citizen?
Can I qualify for Head of Household as a US expat?
Can changing filing status reduce my US tax bill?
How do I choose the best filing status to pay less tax?
Does filing status affect taxes?
Prefer to talk it through? Schedule your free callback today.
Jeff Patterson is an American living in Scotland and joined the team at Expat Tax Online after experiencing the complexities of living abroad with a family.
