US Tax Preparation Checklist for American Expats

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

Filing taxes as a US expat comes with unique challenges, including gathering the right documents to accurately report your income, deductions, and other financial details. Having the necessary documents in order can make the tax preparation process smoother and ensure compliance with IRS requirements.

Here’s a guide to help you collect the essential paperwork when preparing your US taxes.


1. Foreign Income Statements or Payslips

If you worked for a foreign employer, you’ll need to provide payslips or equivalent income statements for the tax year. These documents detail your earnings and help determine your tax obligations under US tax laws.

2. Foreign Tax Documents

Foreign tax documents are vital for US expats to claim the Foreign Tax Credit (FTC) or other tax relief options. These documents include copies of foreign tax returns, receipts for taxes paid, and official assessments from the host country’s tax authorities. The FTC helps avoid double taxation by crediting foreign taxes paid against your US tax liability.

Additionally, some countries may issue tax certificates or summaries detailing taxes withheld from your income, which are essential for accurate reporting. Ensuring you gather and correctly report these documents allows for a smoother filing process and maximizes your tax benefits.

3. Pension Statements

US expats receiving pension income should provide annual pension statements. These statements provide details on contributions, accrued benefits, and payments received. The IRS treats foreign pensions differently from US-based retirement plans, often requiring specific reporting on forms such as Form 8839 or Form 8889. Expats must ensure that their pension statements reflect accurate income amounts for tax purposes. Additionally, some countries have tax treaties with the US that may affect how pension income is taxed.

4. Self-employment or Rental Income and Expenses

For US expats with self-employment or rental income, it’s important to track both income and expenses accurately. Self-employed individuals must report all business earnings, including fees for services rendered, sales of products, or other forms of income. Similarly, rental income from properties abroad must be reported in full. To claim deductions, expats need to document all related expenses, such as:

  • Business or property maintenance costs
  • Travel expenses for work or property management
  • Supplies and equipment purchases
  • Depreciation of assets
  • Advertising costs

Properly organizing these expenses allows expats to reduce their taxable income and ensure compliance with US tax laws while maximizing available deductions. Keep thorough records, including receipts, invoices, and contracts, for accurate reporting on forms like Schedule C or Schedule E.

5. Business-Related Documents

For US expats running businesses abroad, having comprehensive business-related documents is important for accurate tax reporting and compliance. These documents typically include:

  • Financial Statements: Profit and loss statements, balance sheets, and cash flow statements are critical for showing the financial performance of the business.
  • Expense Records: Documenting all business-related expenses, such as salaries, rent, utilities, and supplies, helps determine allowable deductions.
  • Foreign Business Registration Documents: Proof of business registration or incorporation in the host country is necessary for reporting foreign ownership and business activities.

Depending on the business structure, you may also need to file additional forms such as Form 5471 (for foreign corporations) or Form 8865 (for foreign partnerships).

6. Foreign Bank Account Information

US citizens are required to disclose foreign accounts if the total combined value of all accounts exceeds $10,000 at any point during the year.

  • Account Details: This includes the bank’s name, address, and account number. Additionally, expats must provide information about joint account holders or signatories, if applicable.
  • Account Balances: The highest balance of each foreign bank account during the calendar year is needed for the FBAR (FinCEN Form 114) and Form 8938 (FATCA).

7. US-Sourced Income Documents

US expats must accurately report any income earned in the United States. The key documents to gather include:

  • W-2 Forms: For salaried employees, the W-2 form reports annual wages, tips, and other compensation, along with taxes withheld by the employer.
  • 1099 Forms: These forms are used to report income from self-employment, interest, dividends, independent contractor work, or other types of income such as rental income or retirement distributions. Common 1099 forms include 1099-NEC (nonemployee compensation), 1099-DIV (dividends), and 1099-INT (interest).
  • Schedule K-1: If you receive income from a partnership, S-corporation, or trust, you will need a Schedule K-1 to report your share of the business’s income, deductions, and credits.

These documents help ensure that all US income is reported on your US tax return and allow you to claim any appropriate deductions or credits.


Why Staying Organized Matters

Having all required documents ready minimizes errors, speeds up the tax preparation process, and ensures compliance with US tax laws. Missing or incomplete documentation can result in filing delays, penalties, or missed opportunities to claim credits and deductions.

Tax filing for US expats often involves complex rules and additional forms. Partnering with a tax professional experienced in expat taxes can make the process easier. At Universal Tax Professionals, we specialize in helping US expats file their taxes accurately and on time. With just a call or email, we can discuss your situation and the list of document you’ll need.