Irish VAT returns and RTD explained: A guide for small business owners

Published Saturday 3 October 2026

Table of contents

• What is a VAT return in Ireland?
• What is a VAT3 return, and what goes in each box?
• How often do you file VAT returns in Ireland?
• When are Irish VAT returns due?
• How to file a VAT3 return on ROS
• What is the Return of Trading Details (RTD)?
• How VAT refunds work
• Current Irish VAT rates
• Common VAT return mistakes to avoid
• Simplify your VAT returns with Xero
• FAQs on Irish VAT returns

Key takeaways

• VAT-registered businesses in Ireland file a periodic VAT3 return through Revenue Online Service (ROS), reporting VAT charged on sales and VAT paid on purchases.
• Most businesses file bi-monthly, but Revenue can assign four-monthly, six-monthly, or monthly filing based on your annual VAT liability.
• Returns and any payment are due by the 19th of the following month, or the 23rd if you file and pay through ROS.
• You also file an annual Return of Trading Details (RTD) that breaks your year's sales and purchases down by VAT rate.

What is a VAT return in Ireland?

A VAT return is the form you send to Revenue to report the value-added tax (VAT) you've charged customers and the VAT you've paid on business costs. You pay Revenue the difference, or you claim a refund if you've paid more than you've charged.

If your business is registered for VAT, you'll deal with two returns. The first is the VAT3, which you file regularly throughout the year. The second is the annual Return of Trading Details (RTD), which summarises your trading for the year.

What is a VAT3 return, and what goes in each box?

The VAT3 is the periodic return that records the VAT payable or reclaimable for each taxable period. You file it online through Revenue Online Service (ROS).

The main figures sit in a few boxes:

• T1: the total VAT you charged on sales in the period
• T2: the total VAT you paid on purchases and expenses you can reclaim
• T3: the amount you owe Revenue, when T1 is greater than T2
• T4: the amount Revenue owes you, when T2 is greater than T1
• E1 and E2: supplies and acquisitions of goods to and from other EU countries

You can see Revenue's box-by-box guidance on how to complete a VAT3 return.

How often do you file VAT returns in Ireland?

Most businesses file a VAT3 every two months. That's six returns a year, with taxable periods starting on 1 January, March, May, July, September, and November.

Revenue can assign a different frequency based on your annual VAT liability:

• six-monthly: if your annual VAT liability is €3,000 or less
• four-monthly: if your annual VAT liability is between €3,001 and €14,400
• monthly: which suits businesses that are usually due a refund and want the money back sooner

When are Irish VAT returns due?

Your VAT3 and any payment are due by the 19th of the month after the end of the period. If you both file and pay through ROS, the deadline extends to the 23rd.

Filing on time matters even when there's nothing to pay. If you have no VAT to declare for a period, you still file a nil return. You can confirm your obligations on Revenue's guide to accounting for VAT.

How to file a VAT3 return on ROS

You file the VAT3 online through ROS. The steps are straightforward once your figures are ready.

1. Log in to ROS. Sign in to your account on Revenue Online Service using your digital certificate.
2. Open the VAT3 for the period. Go to the VAT section, choose the relevant period, and open the VAT3 return.
3. Enter your VAT on sales (T1). Add the total VAT you charged customers during the period.
4. Enter your VAT on purchases (T2). Add the VAT you paid on business purchases and expenses you can reclaim, plus any EU trade figures that apply.
5. Review T3 or T4. T3 if you owe Revenue or T4 if you're due a refund.
6. Submit and pay. Submit the return and pay any balance due, for example, through a ROS Debit Instruction.

What is the Return of Trading Details (RTD)?

The RTD is an annual, informational return that every VAT-registered business must file, as set out in Revenue's Return of Trading Details guidance. It breaks down your total sales and purchases for the year by VAT rate, with the figures shown exclusive of VAT.

The RTD should reconcile with the VAT3 returns you filed through the year so Revenue can check that they add up. It's due within 23 days of the end of your accounting period, and you still file it even if there's nothing to report. Keeping accurate records as you go by using software that connects to your bank makes the RTD far easier to complete.

How VAT refunds work

When your VAT on purchases (T2) is higher than your VAT on sales (T1), you're due a refund of the difference. This is common for businesses that spend heavily on stock or equipment, or that sell mostly zero-rated goods.

If you're regularly in a refund position, you can ask Revenue to file monthly. That way the money comes back sooner and helps your cash flow.

Current Irish VAT rates

The rate you charge depends on what you sell. You can check the full list on Revenue's page of current VAT rates. As of 1 January 2026, the VAT rates are:

• 23% standard rate: which applies to most goods and services
• 13.5% reduced rate: for items such as fuel, building services, and general repairs
• 9% second reduced rate: for certain goods and services, including some tourism and hospitality items
• 0% zero rate: for exports and certain foods, books, and children's clothing
• 4.8% livestock rate: a special rate for agriculture

Common VAT return mistakes to avoid

A few simple slip-ups cause most VAT headaches. Watch out for these:

• missing the deadline: can trigger interest and penalties
• putting the wrong figures in T1 or T2: often from mixing up VAT on sales and purchases
• forgetting to file a nil return: when there's nothing to declare
• leaving the RTD until the last minute: then finding it doesn't reconcile with your VAT3s
• poor record-keeping through the year: makes every return harder

Good habits and reliable software keep these problems away. Sending accurate invoices with automatic invoicing software also helps your VAT figures stay right from the start.

Simplify your VAT returns with Xero

Staying on top of VAT is easier when your figures update as you work. Xero tracks VAT on every transaction, prepares your VAT3, and lets you submit VAT online to Revenue, so deadlines feel a lot less stressful.

Get one month free

FAQs on Irish VAT returns

Here are quick answers to the questions small business owners ask most about Irish VAT returns.

How do you get a VAT refund in Ireland?

If your VAT on purchases is higher than your VAT on sales, the difference shows in the T4 box and Revenue repays it to you.

Is the RTD separate from the VAT3?

Yes. The VAT3 is your periodic return, while the RTD is a separate annual summary of your sales and purchases by VAT rate.

What happens if you miss a VAT deadline?

Late returns or payments can lead to interest charges and penalties, so file on time even when it's a nil return.