4 Ways You Can Prepare For The 2026 Pay & File Deadline

Every year, individuals and directors within Ireland’s self-assessment system must file their annual income tax return and settle any tax liabilities by the Pay & File deadline.

For the 2025 tax year, the standard deadline for filing a Form 11 Income Tax Return and paying the relevant tax liabilities is 31 October 2026.

However, Revenue has confirmed that taxpayers who both file their return and make the appropriate payment through the Revenue Online Service (ROS) will benefit from an extended deadline of Wednesday, 18 November 2026, in line with Revenue’s annual ROS Pay & File extension.

While this extension provides additional time, we recommend that taxpayers review their obligations and begin preparing their returns well in advance of the deadline.

Pay & File deadline for 2026 – everything you need to know

Key dates to remember

For the 2025 tax year, the following deadlines apply:

• 31 October 2026 – Standard Pay & File deadline
• 18 November 2026 – Extended deadline where both the return and payment are completed through ROS

These deadlines apply to:

• The balance of Income Tax due for 2025
• Preliminary Tax for 2026
• Certain Capital Acquisitions Tax (CAT) returns

Ensuring both the return and payment are completed on time will help taxpayers remain compliant and avoid unnecessary interest or penalties.

With the key deadlines in mind, it is also important to understand whether you are required to file a return under Ireland’s self-assessment system.

Do I need to file a tax return?

Many individuals within the self-assessment system will already be familiar with filing a Form 11 income tax return each year.

For others, particularly those who have recently become self-employed or have additional sources of income, it may be less clear whether a return is required.

Under Ireland’s self-assessment rules, you may need to file a 2025 Form 11 tax return if you meet any of the following criteria:

• You are self-employed or operating as a sole trader
• You are a partner in a business partnership
• You receive rental income from a property
• You have investment income that has not been fully taxed at source
• You receive income from abroad
• You dispose of assets and realise a capital gain

There are also other circumstances where individuals may be required to submit a return, including where they wish to claim certain reliefs or credits.

If you are unsure whether you need to file a return, it is advisable to seek advice as early as possible.

What needs to be completed by the deadline?

Under Ireland’s self-assessment system, taxpayers are required to file both their tax return and pay any tax due by the Pay & File deadline.

This will generally include:

• The balance of income tax due for 2025
• Preliminary tax for 2026

Preliminary tax is effectively an advance payment towards the following year’s income tax liability and must be paid in order to meet Revenue’s self-assessment requirements. To avoid interest charges, taxpayers must ensure that the correct amount is paid by the deadline.

Leaving this calculation until the last minute can sometimes lead to unexpected tax liabilities, so reviewing your position in advance is advisable.

ROS extension to 18 November 2026

The extended deadline of 18 November 2026 applies where taxpayers both file their Form 11 return and make the appropriate payment through ROS.

It is important to note that both the return and payment must be completed through ROS for the extension to apply.

Where only one of these actions is completed through ROS, the extension will not apply and the deadline for both filing and payment remains 31 October 2026.

Capital Acquisitions Tax (CAT)

The extension to 18 November 2026 also applies to certain Capital Acquisitions Tax (CAT) obligations.

Beneficiaries who received gifts or inheritances with valuation dates in the year ending 31 August 2026 must file a CAT return and pay any tax due.

Where both the CAT return and payment are completed through ROS, the extended deadline will apply.

What should taxpayers do now?

With the Pay & File deadline still several months away, now is a good time for taxpayers within the self-assessment system to begin preparing for their filing obligations.

Early preparation allows time to:

1. Gather financial records and supporting documentation
2. Review income sources such as rental, investment, or foreign income
3. Calculate potential tax liabilities
4. Plan for preliminary tax payments for 2026

Taking these steps in advance can help ensure the filing process runs smoothly and reduce the risk of unexpected liabilities closer to the deadline.

How can AAB help?

Understanding and staying on top of your tax obligations can help you avoid unnecessary costs. Although the extended deadline provides additional time, leaving your return until close to the deadline can make the process more stressful and increase the risk of errors or unexpected tax liabilities. Preparing early can help ensure the process runs smoothly.

That’s where our Private Client Services come in. If you need support with preparing your Form 11 tax return, calculating preliminary tax, or understanding what’s required of you before the 2026 Pay & File deadline, please reach out to Rachel Barry or your usual AAB contact.