A new letter from tax stakeholders is pressing U.S. officials to soften a strict rule that blocks companies from deducting dual consolidated losses if any part is used abroad. The request, sent this week to policymakers responsible for international tax rules, asks for a narrow exception that would let firms claim a U.S. deduction for the portion of losses not used outside the country.
The issue centers on the treatment of dual consolidated losses, or DCLs, which can arise in cross-border groups where an entity is recognized by both the United States and a foreign jurisdiction. Under current rules, once any foreign use occurs, the U.S. deduction is denied in full. The letter argues this “all or nothing” approach is too harsh and out of step with how modern multinational structures operate.
“A letter urges an exception to the current ‘all or nothing’ approach that prevents U.S. companies from deducting any part of a dual consolidated loss if even a portion of the DCL was used in a foreign country.”
Background: Why DCLs Matter
Dual consolidated loss rules date to the late 1980s and are designed to stop companies from using the same loss twice—once in the United States and again in another country. The regime, often linked to Internal Revenue Code section 1503(d), relies on certifications and agreements that restrict foreign use of a loss if a U.S. deduction is claimed.
In practice, if a foreign jurisdiction recognizes any part of a loss, the United States denies the entire deduction. Supporters say this protects the tax base and simplifies enforcement. Critics argue it punishes compliance mistakes and treats partial foreign use the same as full duplication.
What the Letter Proposes
The signatories ask for limited relief that would match deductions to actual use. If 30 percent of a loss is used abroad, for example, the U.S. denial would be limited to that 30 percent. The remaining 70 percent would remain deductible in the United States, subject to documentation and guardrails.
- Proportional disallowance tied to the share of foreign use.
- Strict reporting, certification, and audit trails to prevent double dipping.
- Clear rules on timing and recapture if later foreign use arises.
They contend this approach would still protect revenue while reducing distortions for companies with routine cross-border operations.
Industry Concerns and Government Priorities
Tax practitioners say the current rule can turn minor or inadvertent foreign use into a full forfeiture. They also note that compliance is complex when multiple jurisdictions and accounting standards are involved. Multinationals face higher costs, and some structure deals to avoid potential DCL traps rather than for business needs.
Government officials have historically defended a strict stance to deter planning that could drain tax revenue. A bright-line rule is easier to administer, they argue, and helps avoid disputes over how much of a loss was “actually” used overseas. Any change would need to be backed by strong anti-abuse measures.
Potential Impact on Multinationals
A proportional approach could lower audit risk and improve certainty for cross-border groups, particularly in sectors with frequent start-up losses, like technology, energy, and life sciences. It may also ease disputes during mergers or reorganizations, where legacy loss pools are common and recordkeeping varies by country.
However, designing a fair formula is not simple. Companies would need reliable evidence of foreign use each year. Tax authorities would need to track later changes and trigger recapture if new foreign deductions appear. The risk of mismatches between U.S. and foreign tax years adds complexity.
What Comes Next
The letter arrives as policymakers weigh broader international tax shifts. Coordination with foreign rules, including evolving minimum tax frameworks, has increased pressure on legacy systems like the DCL regime. Observers expect the Treasury Department and the IRS to review the request, either through guidance or potential regulatory updates.
Business groups are likely to support a measured exception paired with strong compliance tests. Some public interest advocates may push back, warning that partial deductions could invite new planning strategies unless rules are tight and penalties clear.
The debate turns on a trade-off: enforcement clarity versus proportional fairness. For now, companies will watch for signals from regulators on whether the “all or nothing” standard will hold or shift to a more calibrated model.
If officials explore an exception, they will need clear definitions, consistent documentation standards, and predictable recapture rules. That would offer companies a path to claim legitimate losses while keeping double use in check. Until then, taxpayers face a high-stakes choice: avoid any foreign use or risk losing the deduction entirely.
