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Cross-Border Tax Accountants

Cross-Border Tax Accountants: directory of firms

The United States is one of very few countries that taxes its citizens on the basis of citizenship rather than residence. The IRS states it without qualification: a US citizen or resident alien abroad is subject to tax on worldwide income from all sources and must report all taxable income and pay taxes according to the Internal Revenue Code. Moving to Lisbon or Singapore does not end the filing obligation; it complicates it.

Browse cross-border tax accountants by city, and see what to check before you hire.

This kind of work is often limited to licensed or registered professionals. Ask for their licence or registration number before you share any details.

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Alongside the return sit information reports that are easy to overlook and unpleasant to miss. Foreign bank accounts go to the Financial Crimes Enforcement Network on FinCEN Form 114, not to the IRS with your return. Certain foreign financial assets go to the IRS on Form 8938. Many people have to file both, and filing one does not satisfy the other.

Cross-border work runs in both directions. It covers Americans living abroad, accidental citizens who have never filed, green card holders, non-residents with US rental property or business income, and foreign nationals arriving in the US and discovering that their home-country accounts are now reportable. Each of those is a different technical problem. None of them is served by a general practitioner guessing.

Cross-border situations that need a specialist

  • US citizens living and working abroad, filing a US return alongside the local one and claiming relief so the same income is not taxed twice.
  • Dual citizens who have never filed, often people who left as children and did not know the obligation existed.
  • Green card holders, who are generally treated as US residents for tax purposes wherever they are physically living.
  • Non-resident aliens with US-source income: rental property, business profits, or gains on US real estate.
  • Foreign nationals becoming US residents, whose existing overseas accounts and pensions become reportable.
  • US businesses with foreign subsidiaries or foreign owners, where the reporting sits at entity level as well as personal.

FBAR and Form 8938: two reports, two agencies

The FBAR is FinCEN Form 114, filed electronically through FinCEN's BSA E-Filing System. A US person — including a citizen, resident, corporation, partnership, limited liability company, trust or estate — must file it when the aggregate value of their foreign financial accounts exceeded 10,000 US dollars at any time during the calendar year. The IRS is explicit that you do not file the FBAR with your federal tax return.

The deadline is 15 April following the year reported, with an automatic extension to 15 October if that date is missed. The threshold is an aggregate across all accounts and it is a high-water mark, so several small accounts that together crossed the line for a single day still trigger the obligation.

Form 8938 is a different report, filed with your annual return to the IRS. For an unmarried taxpayer living in the United States, it applies when the total value of specified foreign financial assets was more than 50,000 US dollars on the last day of the tax year, or more than 75,000 US dollars at any time during it; other thresholds apply to other categories. The IRS states plainly that the Form 8938 requirement does not replace or otherwise affect the obligation to file FinCEN Form 114.

Relief that only exists if you file

Living abroad and paying tax there does not automatically remove US tax. The IRS puts the point sharply: many Americans living abroad qualify for special tax benefits, such as the foreign earned income exclusion and the foreign tax credit, but they can only get them by filing a US return.

So the common assumption — I owe nothing, therefore I need not file — inverts the actual mechanics. The relief is claimed on the return. Skip the return and you skip the claim, and the underlying liability sits there unreduced.

The rules for filing income, estate and gift tax returns and paying estimated tax are generally the same whether you are in the United States or abroad. What changes is the timing: taxpayers residing overseas or on military duty outside the US get an automatic two-month extension to file, which moves a calendar-year deadline from 15 April to 15 June.

Catching up when you have never filed: streamlined procedures

The IRS operates Streamlined Filing Compliance Procedures for taxpayers whose failure to report foreign financial assets and pay tax was non-willful. It describes non-willful conduct as conduct that is due to negligence, inadvertence, or mistake, or conduct that is the result of a good faith misunderstanding of the requirements of the law.

A submission means filing amended or delinquent returns in the ordinary way, holding a valid taxpayer identification number, reporting all foreign income, filing the required information returns including FBARs, and certifying that the failures were non-willful. The certification is not a formality; it is a statement made under penalty.

There is a one-way door built in. The IRS states that once a taxpayer makes a submission under either the streamlined foreign offshore or streamlined domestic offshore procedures, they may not participate in the Offshore Voluntary Disclosure Program. Whether the facts are genuinely non-willful is therefore a decision to take with a qualified adviser, and often with a tax attorney, before anything is filed.

Cross-border mistakes that cost the most to fix

  • Assuming a foreign pension or investment wrapper is tax-free in the US because it is tax-free where it sits.
  • Reporting accounts on Form 8938 and concluding that the FBAR is therefore covered, when both are required.
  • Renouncing citizenship or abandoning a green card without dealing with the filing history first.
  • Missing the state layer: leaving the country does not by itself end residency for every state, and some states are difficult to leave.
  • Filing late and claiming relief without checking whether the election in question was still available.
  • Using a preparer who files the federal return correctly but has never seen a foreign information return.

Choosing a cross-border preparer

  • Ask how many returns like yours they file each year and for which countries. This is volume work; occasional exposure is not enough.
  • Confirm they hold a credential with unlimited representation rights — CPA, attorney or enrolled agent — because cross-border returns draw correspondence.
  • Ask whether foreign information returns are inside the quoted fee or billed separately, and which forms they expect to file for you.
  • Check they will handle the state question as well as the federal one.
  • If there are unfiled years, ask them to explain the options before they recommend one, including when a tax attorney should be involved instead.

Why cross-border returns cost more than domestic ones

  • Several reports come from one set of facts, each with its own form, agency and deadline.
  • Currency translation and foreign account statements have to be converted and reconciled before anything can be prepared.
  • Foreign tax credit computations are done by category and carry forward, so prior-year records must be reviewed as well.
  • Treaty positions require research into a specific treaty and are documented on the return.
  • Catch-up filings multiply the work by the number of years involved and are quoted as a project.

Cross-Border Tax Accountants: frequently asked questions

Do I have to file a US return if I live abroad?

If you are a US citizen or resident alien, generally yes. The IRS says you are subject to tax on worldwide income from all sources and must report all taxable income, and that the filing rules are broadly the same whether you are in the United States or abroad.

What is my deadline if I live overseas?

Taxpayers residing outside the United States get an automatic two-month extension to file without requesting it, which moves a calendar-year deadline from 15 April to 15 June. Interest still runs on unpaid tax from the original due date.

Do I need to file an FBAR?

You must file if you are a US person and the aggregate value of your foreign financial accounts exceeded 10,000 US dollars at any point during the calendar year. It is an aggregate across all accounts, and it is measured at the highest point in the year, not at year end.

Is the FBAR filed with my tax return?

No. It goes to the Financial Crimes Enforcement Network as FinCEN Form 114, filed electronically through the BSA E-Filing System. The IRS states directly that you do not file the FBAR with your federal tax return.

I have never filed. What are my options?

The IRS Streamlined Filing Compliance Procedures exist for non-willful failures, and require amended or delinquent returns, all foreign income reported, the necessary information returns including FBARs, and a certification of non-willfulness. Take advice before filing, because using the procedures closes off the Offshore Voluntary Disclosure Program.

If I pay tax abroad, does that cancel my US tax?

Not automatically. Relief such as the foreign earned income exclusion and the foreign tax credit can reduce or eliminate the US liability, but the IRS is clear that taxpayers can only get these benefits by filing a US return.

Sources

  1. IRS — US citizens and resident aliens abroad
  2. IRS — Report of Foreign Bank and Financial Accounts (FBAR)
  3. IRS — Comparison of Form 8938 and FBAR requirements
  4. IRS — Streamlined filing compliance procedures
  5. IRS — Understanding tax return preparer credentials and qualifications

Written by the LokalMatch editorial team. Last reviewed September 22, 2026. How we write and check our guides

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What affects the fees cross-border tax accountants charge

Fees depend on the work involved and how the professional bills. We only publish fee ranges when they’re backed by real LokalMatch data or reliable sources. Until then, here’s what usually changes the fee:

  • Scope and complexity of the work
  • How the professional bills: hourly, flat fee or retainer
  • Experience and seniority of the person doing the work
  • Deadlines and how urgent the work is
  • Third-party costs such as filing, registration or government fees

How to compare cross-border tax accountants before you hire

  • Check that they are licensed or registered for this work where you live, on the regulator’s public register.
  • Look for experience with matters like yours, and ask who will actually handle your file.
  • Ask how they charge before any work starts, and get the terms in writing.
  • Compare two or three professionals before you decide.
  • Be wary of anyone who guarantees a particular outcome.

Questions to ask cross-border tax accountants before you hire

  • Are you licensed or registered for this work, and with which body?
  • Have you handled matters like mine before?
  • Who will do the work, and who will I deal with day to day?
  • How do you charge: hourly, a flat fee or a retainer?
  • What is included in your fee, and what costs extra?
  • Will you confirm the scope and fees in a written engagement letter?
  • Do you carry professional liability insurance?

Licences and registration

This kind of work is often limited to licensed or registered professionals, and the rules depend on where you are. Ask which body they’re registered with, and check their status on that body’s public register before you hire.