Budget 2027 announcements. Implementation dates vary. · By K Imports

Budget 2027: Company tax payments and reporting

Preliminary tax flexibility, the €350,000 small-company threshold, ERR timing and eWithholding.

Sources checked 2026-10-07.

Who it affects and when

Audience: Companies, employers and self-employed professional-service providers.

Timing: ERR option: 1 January 2027. eWithholding changes are subject to a Commencement Order.

Preliminary corporation tax: The proposed top-up mechanism requires at least 80% of the current-year liability by the final preliminary instalment date, with a top-up to 100% within four months of the accounting-period end.
Small-company threshold: The prior-year corporation-tax liability threshold increases from €200,000 to €350,000. This is a tax-liability threshold, not turnover. A 45% deeming provision affecting first/second instalment underpayments is also removed.
Enhanced Reporting Requirements: Employers may retain on-or-before reporting or choose to report specified tax-free benefits by the 14th of the following income-tax month. The option applies from 1 January 2027; it does not remove reporting.
eWithholding: Personalised Deduction Rates are proposed to replace the 20% flat Professional Services Withholding Tax rate. An opt-in real-time information exchange for self-employed taxpayers is also proposed, subject to commencement.

Map the company's actual accounting period and instalment dates.
Do not infer small-company status from sales figures.
Keep benefits records and verify the commencement date before changing reporting or deduction procedures.