ISDA, AFME, ISLA Back EC Tax Omnibus, Push 2030 Start

Three trade associations filed a joint paper with the European Commission on November 5, backing the proposed EC Tax Omnibus as a route to simpler, more certain cross-border taxation — while pressing Brussels to pull the implementation date forward from January 1, 2037 to January 1, 2030.

ISDA, the Association for Financial Markets in Europe (AFME) and the International Securities Lending Association (ISLA) submitted the paper in support of the omnibus package, with the focus trained on withholding tax reform under two directives: the Parent-Subsidiary Directive and the Interest and Royalties Directive.

What does the proposal actually change?

The EC proposal contains four concrete structural changes to withholding tax relief:

• Abolition of the 25% minimum holding requirement that currently gates relief under the directives.
• Introduction of self-assessment, shifting the mechanism away from current refund-and-relief procedures.
• Extension of coverage to pension funds.
• Inclusion of permanent establishment payments within scope.

Each item removes a friction point that currently drives documentation cost and refund risk for cross-border dividend and interest flows through custodian chains.

What numbers sit behind the case?

The European Commission estimates the package would deliver €5.34 billion in annual taxpayer savings. The Commission's accompanying macroeconomic projections, as cited in the associations' submission, include:

• 0.043% uplift in EU gross domestic product.
• 0.07% increase in capital.
• 0.16% rise in wages.

Those figures are Commission estimates, not measured outcomes. The associations adopt them as stated; the paper does not add independent quantification of its own. What is asserted here is economic benefit; what will be measured only after implementation is actual relief-timing and cost reduction.

What do the associations want beyond endorsement?

Support is not unconditional. The joint paper sets out four asks that go beyond the proposal's current text:

• A common definition of beneficial ownership across the directives, closing divergent national interpretations that currently determine who qualifies for relief.
• Clear guidance distinguishing straightforward transactions from complex ones — a recognition that self-assessment will live or die on operational clarity.
• Alignment with the Faster and Safer Tax Relief of Excess Withholding Taxes Directive (FASTER), so that omnibus relief mechanics and FASTER relief-at-source infrastructure do not pull in different directions.
• Implementation from January 1, 2030 rather than January 1, 2037.

The seven-year gap between the two dates is the sharpest number in the submission. A 2037 start would leave market participants managing current withholding tax refund processes — and the custodian workflows they run through — for more than a decade after the proposal's adoption. The associations want that window cut.

Why this sits on desk radars

Withholding tax friction is a direct cost line in cross-border securities lending, dividend arbitrage and portfolio investment flows. The 25% minimum holding threshold currently excludes shorter-holding positions from directive relief, pushing them into national refund regimes with longer cash lock-ups. Abolishing it, and extending scope to pension funds and permanent establishment payments, widens the population eligible for streamlined relief. Self-assessment, if guidance stays clear, would compress refund cycles; if guidance blurs on complex transactions, it shifts interpretation risk onto taxpayers.

The FASTER alignment request is the operational hinge. Relief-at-source infrastructure built under FASTER and a parallel omnibus regime with different definitions or timing would create duplicate compliance paths — the precise fragmentation the omnibus is meant to remove.

Context: a crowded consultation docket

The November 5 filing is one of four ISDA submissions inside a week. On November 6, ISDA responded to the FCA's consultation CP26/34, 'Preparing for the new transaction reporting regime,' on changes to the UK MIFIR transaction reporting regime. On October 30, ISDA commented on the European Parliament's proposed transaction reporting and transparency amendments to the Commission's Market Integration and Supervision Package, commending the Parliament's ambition while cautioning against overreach. On November 2, ISDA answered the FCA's call for input on tokenized gold, backing its use as wholesale collateral.

None of those items is legally tied to the tax omnibus, but together they map the same trade-body priority: standardize definitions, compress timelines, and cut the operational drag of divergent national regimes.

The Commission has not responded publicly to the joint paper. Whether the 2030 date survives the legislative process — and whether a common beneficial ownership definition makes it into final text — will determine whether €5.34 billion in claimed annual savings becomes measurable or remains an estimate.

By James Calloway