How to Avoid an Audit as a US Expat

Josh Katz, CPA
Author: Josh Katz, CPA
Updated: October 22, 2025

As an American expat, filing your taxes can already feel complicated. The last thing you want is to face an audit from the Internal Revenue Service (IRS). While audits are rare, certain mistakes or omissions can increase your chances of being flagged. In this article, we’ll explore how you can reduce your audit risk and ensure your tax return is accurate and compliant with US laws.


Understanding Your Filing Obligations

As an American living abroad, you must meet specific tax filing requirements, even if you earn income outside the US or pay taxes to a foreign government. US citizens and Green Card holders are required to report their worldwide income annually by filing Form 1040. Depending on your circumstances, you may also need to file additional forms:

  • Form 2555: To claim the Foreign Earned Income Exclusion (FEIE) if you meet the Physical Presence or Bona Fide Residence Test.
  • Form 1116: To claim the Foreign Tax Credit (FTC) for taxes paid to a foreign country.
  • FBAR (FinCEN Form 114): To report foreign bank accounts if the combined balance exceeds $10,000 at any point during the year.
  • Form 8938: For foreign assets exceeding $200,000 for individuals living abroad. 

Failing to file these forms, or filing them incorrectly, can raise red flags for the IRS.


Report your Worldwide Income

Transparency about foreign income is essential for avoiding audits. The IRS requires you to report all income, including wages, self-employment earnings, rental income, dividends, and interest earned abroad. Inaccurate or incomplete reporting can trigger scrutiny.

Keep thorough documentation, such as pay stubs and bank statements, to support your filings. Honesty and detailed records help ensure compliance and reduce audit risks.


Avoid Claiming Unrealistic Deductions or Exclusions

Expats can benefit from tax-saving provisions like the Foreign Earned Income Exclusion (FEIE) and Foreign Tax Credit (FTC), but these claims must be realistic and accurately calculated to avoid raising red flags with the IRS.

For example, to claim the FEIE, you must meet specific eligibility criteria such as the Physical Presence Test (spending at least 330 days outside the US in a 12-month period) or the Bona Fide Residence Test (establishing residency in a foreign country for an uninterrupted tax year). Misinterpreting these tests or inflating excluded amounts can lead to audits.

Similarly, the FTC allows you to offset US taxes with foreign taxes paid, but only for eligible income and expenses. Overestimating foreign tax credits or claiming deductions without proper documentation, such as receipts or tax statements from foreign governments, can attract scrutiny.

Accurate calculations and a clear understanding of eligibility criteria are essential to avoid complications.


File All Required Forms on Time

Filing your US taxes on time is crucial for avoiding penalties and IRS scrutiny. As an expat, you’re subject to specific filing deadlines, including an automatic extension to June 15th (June 16th for the 2024 tax year), but extensions don’t eliminate the need to file by the extended date. If you require more time, you can request a second extension until October 15th. However, failure to file or pay on time can lead to penalties, interest, and increased audit risk.

Beyond the main Form 1040, additional forms, such as FBAR for foreign bank accounts and Form 8938 for foreign assets, must also be filed on time. Missing or late submission of these forms can trigger red flags with the IRS. Staying organized, setting reminders, and seeking professional assistance can help you meet these deadlines and remain compliant.


Avoid Rounding Errors and Inconsistent Data

Rounding errors and inconsistent data can easily attract IRS attention. The IRS relies on automated systems that flag discrepancies between different parts of your tax return. For instance, if your income or deductions are rounded inconsistently, the IRS may view it as a potential mistake or attempt to mislead.

Always report exact amounts, especially with foreign income, tax credits, and deductions. Double-check your figures to ensure consistency across forms like Form 1040, Form 2555, and Form 1116. Using tax software or working with a professional can help eliminate errors and ensure your data aligns perfectly, reducing audit risk.

 


Be Careful With Currency Conversions

If you have income, deductions, or credits in foreign currencies, make sure you are converting these amounts correctly. The IRS requires that you convert foreign income into US dollars using the appropriate exchange rates. Incorrect or inconsistent currency conversion could be a red flag.

Tip: Use the IRS’s recommended exchange rates or an average rate for the year when converting foreign income to US dollars.


Don’t Ignore State Tax Obligations

Even as an expat, you may still be required to fulfill state tax obligations, depending on your home state’s rules. Some states, like California and New York, consider you a resident for tax purposes if you maintain ties, such as property, business, or family connections. Ignoring these requirements can lead to penalties, interest, and potential audits. Research your state’s tax laws to determine if you need to file state returns while living abroad.


Work With a Qualified Tax Professional

US tax laws for expats can be complicated, and even small mistakes can trigger an audit. Working with a tax professional who is experienced in US expat tax law can significantly reduce the risk of errors and omissions on your tax return. A tax expert can also help ensure you’re taking advantage of all available exclusions, credits, and deductions while remaining compliant with IRS rules.

While an audit can be stressful, following the IRS rules and filing your tax returns correctly as an expat will significantly reduce the chances of being audited. Make sure to file on time, report all your income, claim exclusions and credits properly, and keep thorough documentation of your finances. If you’re uncertain about any aspect of your tax return, consider seeking professional advice. By staying compliant with tax laws and maintaining accurate records, you can minimize the chances of an audit and enjoy peace of mind as an American living abroad.