The Implication: Precision is Now a Compliance Risk
For years, the March 31 share scheme filing deadline has been a test of data gathering endurance. This year, however, it is a test of technical precision. The release of Revenue eBrief 039/26 has fundamentally altered the filing landscape for the 2025 reporting period by introducing Version 26.1 of the standard share scheme forms.
The most disruptive change is not a new tax rule, but a data standard: a mandatory shift to 5-decimal point precision for market values. For firms relying on legacy spreadsheets or automated reports rounded to two decimal places, this seemingly minor technical tweak threatens to trigger widespread upload rejections on the Revenue Online Service (ROS) just days before the deadline.
The Facts: What eBrief 039/26 Changed
On February 27, 2026, Revenue released eBrief 039/26, confirming the immediate availability of updated reporting forms for the 2025 tax year.
Key updates include:
- New Form Versions: Mandatory use of v.26.1 for Form ESA (Electronic Share Awards), Form RSS1 (Share Options), and Form KEEP1.
- Precision Requirement: All market value fields now require 5-decimal point precision (e.g., €12.50123 instead of €12.50).
- Strict Validation: The ROS upload facility has been updated to reject files that do not meet this new schema, meaning older v.25 forms or rounded data sets will fail validation instantly.
- Deadline: The filing deadline for all 2025 share scheme returns remains March 31, 2026.
Analysis: The "So What" for Accountants
This update creates an immediate bottleneck for payroll and tax teams. The shift to 5-decimal precision is likely a move by Revenue to align Irish reporting with global share trading standards, where fractional share values are common. However, for Irish accountants, the practical fallout is significant.
1. Data Clean-Up Overload Most client data provided by HR or third-party brokers is formatted to two decimal places. Re-calculating or retrieving the raw, unrounded data for thousands of employee awards (RSUs, unapproved options, etc.) will require significant manual intervention. Simply adding three zeros (e.g., 12.50000) may be acceptable for some fields, but where fractional shares are involved, rounding errors could now trigger discrepancies between the filed return and the employer's payroll records.
2. The "Version Control" Trap Practitioners who downloaded forms earlier in February to "get a head start" are now holding obsolete documents. Work completed on v.25 forms cannot simply be copy-pasted into v.26.1 without risking macro corruption. The new forms contain updated validation scripts; pasting data blocks from old sheets often breaks these internal macros, rendering the file un-uploadable.
3. Penalty Exposure Failure to file a compliant return by March 31 attracts a fixed penalty, but the greater risk is the reputational damage of a late filing due to technical rejection. Furthermore, incorrect returns can trigger Revenue interventions or audits of the share scheme itself, potentially jeopardizing the tax-favoured status of schemes like KEEP.
Action Plan: Navigating the March 31 Deadline
To ensure compliance and avoid ROS rejections, firms must adapt their workflow immediately:
- Purge Old Forms: Delete any blank copies of Form ESA, RSS1, or KEEP1 downloaded prior to February 27. Only v.26.1 (available on Revenue.ie) will be accepted.
- Audit Data Precision: Review client data sources immediately. If you are receiving reports rounded to two decimals, request raw data exports with full precision from the share plan administrator.
- Test the Macros: Before populating the full return, test one row of data in the new v.26.1 spreadsheet to ensure the 5-decimal validation accepts your input format.
- Register for SSR: Ensure the employer is registered for Share Scheme Reporting (SSR) on ROS. This registration can take 2-3 days, so do not leave it until the last week of March.
- Validate Early: Do not wait until March 31 to attempt an upload. Upload a test file (if possible) or the final file as soon as it is ready to catch formatting errors while you still have time to fix them.
The Solution: Master the New Forms
With the technical bar raised, "business as usual" is a risky strategy for this filing season. To support your team, we are hosting a dedicated technical briefing: "2026 Share Scheme Reporting: Navigating the New ROS Forms and ESA Compliance."
This session will provide a line-by-line walkthrough of the v.26.1 forms, demonstrating exactly how to format data for the new 5-decimal requirement and troubleshoot common ROS upload errors. We will also cover specific reporting nuances for KEEP1 and RSS1 to ensure your clients remain fully compliant.