International Taxation Attorneys Share Expert Advice

When International Tax Counsel Can Help with Global Compliance

Quick Answer: What Does an International Taxation Attorney Do?

If you hold foreign accounts, operate across borders or own assets in multiple countries, an international taxation attorney can help identify applicable obligations and legal risks. The appropriate assistance depends on the facts and the adviser’s experience.

U.S. citizens and resident aliens generally must report worldwide income, regardless of where they live or earn it. Tax, withholding and information-reporting obligations can overlap; credits, exclusions or treaty provisions may apply under their own conditions.

A missed filing, inaccurate foreign-account report or failure to withhold on a property transfer can create exposure. The particular obligation and conduct determine the consequences.

Civil penalties and, for specified conduct, criminal exposure require separate analysis. Counsel can help identify required filings and a defensible response; representation does not guarantee protection or a favorable result.

Prepare a list of countries, accounts, entities and transactions, together with returns, notices and deadlines, before choosing a compliance or dispute-resolution strategy.

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What is International Taxation and Why Do You Need an International Taxation Attorney?

International taxation concerns people and entities earning income, conducting business or holding assets across borders. U.S. citizens generally remain subject to U.S. income tax abroad; resident aliens generally face worldwide-income taxation based on residence. Citizenship and tax residence are distinct concepts, and exceptions or treaty positions require analysis.

Different residence and source rules can expose the same income to tax in more than one country. Foreign tax credits, exclusions or treaty relief may reduce double taxation, subject to their respective requirements and limits.

An international taxation attorney can assess how U.S. law interacts with the relevant foreign system and treaty, often in coordination with foreign counsel. Expatriates, inbound real estate investors and expanding businesses face different issues; specialized advice may be appropriate.

Confirm which jurisdictions and services a proposed engagement covers. Related resource: International Tax Services.

Common Cross-Border Tax Issues Requiring Specialized Counsel

FATCA and intergovernmental arrangements support reporting of specified U.S. accounts by participating foreign financial institutions. Exceptions and different reporting channels apply; it is inaccurate to say every foreign account is automatically shared. Several distinct regimes may be relevant:

• FBAR (Report of Foreign Bank and Financial Accounts): A separate FinCEN report for covered U.S. persons with reportable foreign financial accounts above the aggregate threshold, subject to exceptions.
• FATCA (Foreign Account Tax Compliance Act): Includes reporting by certain foreign financial institutions and separate Form 8938 duties for specified taxpayers meeting the applicable requirements.
• FIRPTA (Foreign Investment in Real Property Tax Act): A tax law governing how foreign persons are taxed when selling U.S. real estate.
• Net CFC Tested Income (formerly GILTI) & Subpart F: Rules that can require current income inclusions for qualifying U.S. shareholders of controlled foreign corporations, including some individuals.
• Transfer Pricing: Rules requiring transactions between related international business entities to be conducted at “arm’s length” to prevent artificial profit shifting.

Understanding how these rules overlap is the first step toward compliance. The table below highlights the key differences between the two most common individual offshore reporting requirements:

Navigating FBAR and FATCA with an International Taxation Attorney

A covered U.S. person generally must file an FBAR if the aggregate value of reportable foreign financial accounts exceeded $10,000 at any time during the calendar year. Review financial-interest and signature-authority rules and applicable exceptions.

A reportable account need not generate taxable income. Signature authority can trigger an FBAR duty without ownership, subject to the applicable exceptions; this is different from the Form 8938 interest requirement.

Form 8938 requirements depend on taxpayer status, asset type, value, filing status and whether the individual qualifies as living abroad. It does not replace the FBAR, and a person with no required income tax return generally need not file Form 8938. See A Taxpayer’s Guide to Compliance Under FATCA and Foreign Bank Account Reporting.

When a taxpayer realizes they have missed these filings, one key question is whether the failure was “willful” or “nonwillful.”

• Nonwillful conduct includes negligence, inadvertence, mistake or a good-faith misunderstanding of legal requirements. Streamlined procedures require a truthful certification and all eligibility conditions; domestic and foreign procedures differ in requirements and penalty treatment. An IRS examination or criminal investigation can preclude eligibility.
• Willful failures—determined from the actual facts, including applicable knowledge or recklessness standards—can carry a civil maximum equal to the greater of the inflation-adjusted statutory dollar amount or 50% of the balance at the violation, with potential criminal prosecution for specified conduct.

An FBAR attorney can assess the facts, applicable penalties and potential correction routes. No disclosure procedure should be described as automatically safe or guaranteed to eliminate penalties.

Corporate Tax Challenges: Net CFC Tested Income, Subpart F and Transfer Pricing

For businesses operating across borders, corporate tax compliance is an incredibly complex puzzle. A foreign corporation generally is a Controlled Foreign Corporation (CFC) when more than 50% of its voting power or value is owned by U.S. shareholders under applicable direct, indirect and constructive ownership rules. Special rules and shareholder definitions apply.

Subpart F and § 951A can require current U.S.-shareholder income inclusions without a cash distribution, subject to their respective rules and exceptions. For tax years beginning after 2025, § 951A uses net CFC tested income terminology; prior-year GILTI rules should be described separately.

Multinationals must also address transfer pricing. Transactions in which a U.S. company sells goods, licenses intellectual property or provides services to a foreign affiliate must satisfy the applicable arm’s-length standard and may be reviewed by the IRS.

The IRS may adjust related-party pricing and assess penalties when the applicable standards are not met. Review the arm’s-length support for intellectual-property transfers, cost sharing and other intercompany transactions; documentation alone does not guarantee acceptance.

How Attorneys Facilitate Cross-Border Transactions and Foreign Investments

Expanding your business globally or acquiring foreign assets is an exciting milestone, but doing so without a clear tax strategy is incredibly risky. International tax attorneys serve as architects for cross-border transactions, structured mergers and acquisitions (M&A), and corporate restructurings.

Inbound investment and outbound expansion require analysis of entity classification, ownership, income, withholding and reporting in each relevant jurisdiction. Proper planning can identify risks but does not assure the lowest tax or eliminate all compliance exposure.

Structuring Inbound and Outbound Investments

Investment planning considers domestic foreign-tax-credit rules, any applicable treaty benefits and withholding obligations. Credits do not depend solely on treaties, and treaty eligibility and limitations must be tested.

Before closing, identify the parties, asset or entity interests transferred, relevant countries, financing terms and expected filing or withholding responsibilities.

These complex transactions require a deep understanding of corporate law and tax policy. Navigating these transactional and structural challenges requires careful planning, particularly when managing multinational transactions, transfer pricing methodologies, and cross-border corporate structures.

Resolving Disputes: Tax Controversy, Audits, and Appeals

When the IRS or a foreign tax authority challenges your international tax positions, the situation quickly transitions from planning to defense. Tax controversy involving international assets is highly technical.

Issues in an audit may include transfer pricing, eligibility for foreign tax credits and whether a foreign entity has a permanent establishment in the United States.

To resolve these high-stakes disputes, international tax attorneys utilize specialized administrative mechanisms, including:

• Competent Authority Assistance: A taxpayer may request help with taxation inconsistent with a treaty. The competent authorities seek a resolution under the treaty’s mutual agreement procedure; relief is not guaranteed.
• Mutual Agreement Procedure (MAP): The treaty procedure through which competent authorities address qualifying tax disputes, including certain double-taxation cases. Treaty deadlines and domestic remedies require coordination.
• Advance Pricing Agreements (APAs): Agreements address transfer-pricing methods for defined covered transactions and years. They do not prevent all future audits; compliance, critical assumptions and matters outside the agreement remain relevant.

Defending Clients in International Tax Audits

If selected for an international tax audit, review the notice, preserve supporting records and track deadlines. Professional advice may be particularly important where willfulness or criminal exposure could be at issue.

Counsel can manage authorized communications, develop legal arguments and represent the taxpayer before IRS Appeals within the agreed scope. Court representation requires the appropriate admission and procedures.

Penalty mitigation depends on the specific penalty and facts. Reasonable cause is a legal standard with conditions that vary; good faith or lack of tax-evasion intent alone does not establish entitlement to relief.

Before correcting past noncompliance, evaluate eligibility, prior IRS contact and whether the conduct was willful. Some cases fit ordinary amended or delinquent filings; others may fit streamlined procedures or the Voluntary Disclosure Practice, without guaranteed immunity. See our Dallas international tax attorney guide.

Choosing the Right International Tax Counsel: Large Firms vs. Boutiques

When seeking international tax counsel, you will generally choose between large global law firms and boutique tax controversy firms.

Compare the actual team, relevant experience, service scope and fee proposal. Firm size alone does not establish cost, expertise or the quality of client attention.

A complex corporate transaction may require coordinated tax, corporate and foreign-law advice. A focused tax controversy matter may call for a different team.

Ask who will perform the work, communicate with you and handle issues outside the engagement. Obtain a clear explanation of fees and responsibilities.

Key Credentials to Look For in an International Taxation Attorney

Credentials can inform your assessment, but no designation alone proves expertise or guarantees results. Verify current licenses and relevant experience:

• LL.M. in Taxation: A Master of Laws in Taxation is an advanced law degree representing rigorous, specialized training beyond standard law school.
• CPA (Certified Public Accountant) License: A separate accounting credential that may be useful alongside legal training; confirm the practitioner’s actual experience and active status.
• TEP (Trust and Estate Practitioner) Designation: A professional designation relevant to trust and estate practice. Ask about experience with the particular cross-border issues involved.
• Prior IRS Experience: Relevant agency experience may help inform an adviser’s work. Confirm the actual role and do not assume it creates influence over the outcome.

Evaluate experience relevant to your matter and the scope of representation. Related resource: Boston International Tax Attorney.

Developments to Check for the Relevant Tax Year

International reporting rules and administrative procedures change. Distinguish enacted rules from proposals and apply the provisions effective for the tax year and jurisdiction involved.

The OECD’s Pillar Two framework provides for a 15% minimum effective tax for in-scope large multinational groups through implementing domestic rules. It is not a universal flat tax on every business. Scope, exclusions, safe harbours and jurisdiction-specific implementation matter, including the 2026 Side-by-Side package.

In Moore v. United States (2024), the Supreme Court upheld the Mandatory Repatriation Tax as applied to shareholders’ attributed shares of income realized by a foreign corporation. The holding was narrow and did not resolve the broader constitutional question of taxing unrealized gains.

The decision does not validate every possible offshore tax or expand all IRS powers. Assess the particular statute and applicable precedent for the issue involved.

Frequently Asked Questions about Global Tax Compliance

What are the consequences of non-compliance with international tax laws?

The consequences depend on the reporting duty, tax liability and conduct. Possible enforcement measures include:

• Civil Penalties: Nonwillful civil FBAR reporting violations are assessed per report, with an inflation-adjusted maximum and a reasonable-cause exception. For a willful civil violation, the maximum can be the greater of the adjusted statutory dollar amount or 50% of the account balance at the violation. Specified criminal conduct can also lead to prosecution.
• Bank Levies and Tax Liens: Unpaid assessed federal taxes can lead to liens or levies, subject to applicable notice requirements, exceptions and review rights.
• Passport Restrictions: The IRS may certify qualifying seriously delinquent federal tax debt to the State Department, which has passport authority. Conditions and exceptions apply; FBAR penalties are excluded from this tax-debt certification.
• Criminal Exposure: In cases of intentional tax evasion or hiding offshore assets, the IRS can refer the case to the Justice Department for criminal prosecution.

To learn more about how these rules affect expats and how to protect yourself, read our guide on Americans Living Abroad.

How do tax treaties prevent double taxation?

Tax treaties allocate or limit taxing rights under their specific provisions. They may define treaty residence, reduce withholding on qualifying income and provide mechanisms to relieve double taxation. Treaty residence is not simply the same as a person’s tax home, and domestic foreign-tax-credit rules must also be considered.

Treaty saving clauses generally preserve U.S. taxation of citizens and specified residents, with exceptions. Review the actual treaty, eligibility, disclosure duties and any state-tax treatment before claiming benefits.

What is FIRPTA and how does it affect foreign sellers of U.S. real estate?

FIRPTA generally imposes withholding on dispositions of U.S. real property interests by foreign persons. The usual rate is 15% of the amount realized, rather than the gain, but reduced rates, exemptions and special rules can apply. Withholding is a payment toward the tax; it is not necessarily the seller’s final liability.

A seller may need to file the appropriate U.S. return to determine final tax and claim credit or a refund. Form 8288-B can be used to request an IRS withholding certificate where applicable. An application does not itself authorize zero withholding; review the certificate and the separate withholding and remittance rules before closing.

Conclusion

Whether addressing unfiled FBARs, an international audit or cross-border expansion, start with the actual records and applicable deadlines. Qualified advisers can help evaluate the available options and their limits.

For a consultation, organize your returns, notices and account or entity records. Contact Segal, Cohen & Landis (SCL). Sources checked October 6, 2026 include IRS reporting guidance, Public Law 119-21 and OECD global minimum tax guidance.