For U.S. taxpayers who claim the Foreign Tax Credit (FTC), keeping up with international tax developments isn’t just good practice—it’s a necessity. One of the most complex and often misunderstood areas of claiming the FTC involves foreign tax redeterminations. When a foreign government adjusts the amount of tax you owe or paid, the IRS expects you to revisit and potentially revise your U.S. tax return. This process can result in recalculations, amendments, or even penalties if ignored.
In this article, we’ll explore what constitutes a foreign tax redetermination, how it impacts the Foreign Tax Credit, and what you should do when a redetermination occurs.
Table of Contents
What is a Foreign Tax Credit (FTC)?
The Foreign Tax Credit is a provision under U.S. tax law (primarily governed by IRS Form 1116 and related guidance) that allows taxpayers to offset U.S. tax liability with taxes paid to a foreign government. The goal is to avoid double taxation—paying income tax to both a foreign country and the United States on the same income.
To claim the FTC, the tax must be:
- A legal and actual foreign tax liability,
- Paid or accrued,
- An income tax or tax in lieu of income tax, and
- Imposed on the taxpayer.
What is a Foreign Tax Redetermination?
A foreign tax redetermination occurs when there is a change to the amount of foreign income taxes paid or accrued after a taxpayer has already claimed an FTC for that tax year. This can happen for various reasons, such as:
- An audit or adjustment by a foreign tax authority,
- A late refund of foreign taxes,
- A change in exchange rates,
- Mistaken calculation of foreign income or deductions,
- Late-paid foreign taxes claimed on an accrued basis.
When a redetermination happens, the taxpayer is required by law to notify the IRS and recalculate the FTC for the affected year(s).
Triggers That Cause a Recalculation of the FTC
Several common scenarios can trigger the need for a redetermination and recalculation:
- Foreign Audit or Tax Adjustment
If the foreign tax authority increases or decreases your income tax after an audit, this change directly affects the FTC you were allowed to claim on your U.S. return. The IRS expects you to report this change—even if the foreign audit occurs years later.
- Foreign Tax Refund
If you receive a refund or credit for previously paid foreign taxes that you already claimed as an FTC, your original credit is now overstated. The IRS will require you to pay back the difference with interest and possibly penalties.
- Late Payment of Accrued Foreign Tax
Taxpayers may claim foreign tax on an accrual basis, assuming it will be paid. But if the tax is paid more than two years after the end of the tax year, the IRS may disallow the original credit and require a redetermination.
- Changes in Currency Conversion
The IRS requires foreign taxes to be converted into U.S. dollars using exchange rates from specific dates. If there’s an error or correction in conversion (e.g., due to an audit or recalculation), that’s also grounds for redetermination.
- Mistaken Classification of Income
Misclassifying foreign-sourced income or deductions that affect foreign taxable income can lead to changes in the calculated foreign tax amount and FTC limitation, requiring a redetermination.
How to Report a Foreign Tax Redetermination
Once a redetermination occurs, the IRS expects you to:
- File an Amended Return
Use Form 1040-X for individuals or Form 1120-X for corporations to amend the original return and adjust the FTC.
- Attach Form 1116 or 1118
Include the revised Form 1116 (individuals) or Form 1118 (corporations) reflecting the redetermined amount of foreign taxes.
- Provide an Explanation
Attach a statement explaining the redetermination, including:
- The nature of the change (audit, refund, late payment),
- The foreign tax years affected,
- Revised amounts of income and tax,
- Date of redetermination.
What Happens If You Don’t Report a Redetermination?
Failing to report a redetermination within the statutory deadline (generally within one year of receiving notice or refund) can result in:
- Disallowance of the original FTC,
- Penalties,
- Interest on underpaid taxes.
Additionally, the IRS can reopen previously closed years to audit the FTC if a redetermination is involved.
Special Considerations for Corporations and CFCs
For U.S. shareholders of controlled foreign corporations (CFCs), reporting changes becomes even more complex. Any foreign tax redetermination must also be reflected on Form 5471—used for reporting foreign companies and their tax attributes. Errors or omissions here can carry significant penalties.
Planning Ahead to Avoid Redeterminations
While not all redeterminations can be avoided, here are ways to reduce risk:
- Pay foreign taxes promptly to avoid late-payment rules.
- Use accurate currency exchange rates and document them.
- Monitor foreign audits and assessments closely.
- Maintain detailed records of all foreign tax returns and communications.
- Work with tax professionals who understand international tax compliance.
Conclusion
Foreign tax redeterminations are a vital, yet often overlooked, component of international tax compliance. U.S. taxpayers claiming the FTC must stay vigilant about any changes to their foreign tax liabilities. Whether it’s due to a foreign audit, refund, or late payment, failing to report and adjust can lead to serious IRS consequences.
If you’re navigating complex cross-border tax issues—particularly when reporting foreign companies on Form 5471 or claiming the FTC—working with a knowledgeable tax advisor can save you time, money, and legal headaches.