Ireland Bi-Monthly VAT: July–August Pack Due 19 September 2026
After the 19 August monthly July VAT 3, bi-monthly filers must prepare the July–August VAT 3 for 19 September 2026 — Revenue also lists four-monthly May–August and annual September–August returns on the same date.
Revenue’s September 2026 calendar sets bi-monthly VAT 3 return and payment for the period July–August 2026 on 19 September, together with the Return of Trading Details where the VAT accounting period ends between 1 July and 31 August. Four-monthly VAT 3 for May–August 2026 and annual VAT 3 for the September–August cycle (where the period ends in August) share that date.
As of 19 August — the due day for monthly July VAT 3 — bi-monthly filers should not treat today as their filing deadline. They should instead lock July figures now so the July–August pack does not inherit a month of miscodes when August closes.
Confirm your authorised frequency in ROS
Copying a neighbour’s diary is how businesses file the wrong VAT 3. Check ROS for monthly, bi-monthly, four-monthly, or annual authorisation before you schedule the September review. Monthly August VAT 3 also falls on 19 September for those on a monthly cycle — a separate obligation from the bi-monthly July–August return.
Hospitality and catering businesses still reconciling the 9% VAT changes from 1 July should keep July and August rate splits clean now; September is too late to unwind a full bi-monthly period of mixed codes.
Four-week runway to 19 September
Close July purchase and sales analyses this week while the monthly VAT 3 day is fresh.
Diary August bank feeds and receipt capture so the second month does not arrive as a scramble in mid-September.
Align PAYE (14 September) and RCT (23 September) cash around the VAT review, not against it.
IOSS August returns land on 30 September — keep import one-stop-shop packs off the bi-monthly VAT critical path.
How FinnAccountings helps bi-monthly filers
Rate-aware ledgers make July–August VAT packs faster to review. FinnAccountings helps Ireland and UK VAT-registered businesses prepare bookkeeping and VAT drafts with Chartered Accountant insight before you or your Chartered Accountant (Ireland) or ICAEW/ACCA adviser files. Start a free trial for review-ready drafts — we prepare records; we do not file VAT 3 through ROS on your behalf.
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Related reading
Use today’s three-day PAYE/RCT/CT briefing if you still have ROS cash to clear by 23 August.
Thirty-day bi-monthly countdown from 20 August to 19 September.
Yesterday’s after-VAT-3 ROS cash briefing still maps the wider sequence — and Sunday bank cut-offs.
September’s full SME deadline map covers PAYE, VAT, CT1, and RCT together.
Restaurant and catering businesses should keep July 9% reconciliations ready for the bi-monthly pack.
Sources & references
This article draws on official guidance from the sources below.
- Calendar of key dates for tax professionals
Revenue · Accessed 2026-08-19 - Filing returns and making payments
Revenue · Accessed 2026-08-19 - When VAT becomes payable
Revenue · Accessed 2026-08-19
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