Compliance Center

What do I need to do this month?

Ireland's most complete compliance resource. Every deadline, checklist, and obligation — filtered for your business, free.

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23 September

VAT3 Return — July/August Period (ROS)

File your VAT3 return for the July–August period via ROS. Non-ROS deadline is 19 September.

13 days
23 September

Corporation Tax Return (CT1) — December Year End

Companies with a 31 December year end must file their CT1 return and pay any…

13 days
31 October

Preliminary Income Tax Payment

Self-employed individuals and directors must pay preliminary income tax for the current year by 31…

51 days
31 October

Form 11 — Paper Filing Deadline

The self-assessment income tax return (Form 11) for the prior tax year must be filed…

51 days
31 October

Income Tax Balance Payment

Any balance of income tax owed for the prior year (above what was paid in…

51 days

📋 September Checklist

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  • File P30 PAYE/PRSI (August) via ROS by 23rd High
  • File VAT3 for Jul/Aug period by 23rd High
  • File CT1 and pay Corporation Tax balance (Dec year end) by 23rd High
  • Final push on Form 11 preparation — October deadline approaching High

🔍 Search Deadlines & Obligations

📂 Compliance Categories

Income Tax 2 obligations VAT 1 obligation Payroll & PAYE 1 obligation Corporation Tax 1 obligation Property 1 obligation CRO / Companies 1 obligation Capital Gains 1 obligation PRSI & USC

📄 Key Obligations — Full Guides

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Form 11 — Self-Assessment Income Tax Return

Everything you need to know about the Form 11 deadline

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Preliminary Income Tax — October Payment

How to calculate and pay your preliminary tax correctly

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VAT3 Return — Bimonthly Filing

Every VAT3 deadline, penalty and filing step explained

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Monthly Employer Payroll (P30) Return

Your monthly payroll filing obligations — PAYE Modernisation

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Corporation Tax Return (CT1)

CT1 filing dates, preliminary tax, and how to calculate your liability

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CRO Annual Return

Annual Return filing with the Companies Registration Office

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Capital Gains Tax — Payment Deadlines

When and how to pay Capital Gains Tax in Ireland

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Local Property Tax (LPT)

LPT rates, payment dates and exemptions explained

📅 Full Compliance Calendar

Every Irish tax deadline for 2026, month by month. Filter by your business profile and download a print-ready version.

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