Resources & Key Dates
Deadlines, links and practical guides
The dates and official resources every Irish business should have to hand — and quick guides for getting started.
Key Dates
Irish tax deadlines to keep in mind
31 October
Income tax return (Form 11) and payment deadline for self-assessed individuals — extended to mid-November when filing and paying through ROS.
19th / 23rd of the month
VAT3 returns and payment for the preceding taxable period (23rd when filing via ROS).
14th of the month
PAYE/PRSI/USC remittance for employers (23rd for ROS filers, monthly or quarterly).
9 months after year end
Corporation tax return (Form CT1) and balance of payment — by the 23rd of the ninth month via ROS.
56 days from ARD
CRO annual return (Form B1) with financial statements — late filing loses audit exemption for two years.
Dates are indicative and may vary by year and filing method — always confirm with Revenue or contact us for advice specific to your situation.
Useful Links
Official resources
Revenue Commissioners ↗
Tax information, forms and guidance for individuals and businesses.
Revenue Online Service (ROS) ↗
File returns and pay taxes online.
Companies Registration Office ↗
Annual returns, incorporations and company filings.
Local Enterprise Office Carlow ↗
Grants, mentoring and training for Carlow businesses.
Local Enterprise Office Laois ↗
Supports for small businesses in Laois.
Citizens Information ↗
Employment rights, social welfare and business rules explained.
Getting Started
Quick guides
Starting as a sole trader
Register for income tax with Revenue (Form TR1)
Open a separate business bank account
Keep records of all income and expenses from day one
Setting up a limited company
Incorporate with the CRO and appoint directors
Register for corporation tax, VAT and PAYE as needed
Note your Annual Return Date (ARD) straight away
Registering for VAT
Check the current registration thresholds
Choose the right VAT basis — invoice or moneys received
File VAT3 returns on time through ROS
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