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Business Day Calculator

Ireland Business Day Calculator

Last reviewed: October 14, 2026 · Holiday data: October 7, 2026

Calculate business days in Ireland with the ten public holidays of the Organisation of Working Time Act 1997 pre-loaded, St Brigid's Day included since 2023 (S.I. No. 50 of 2022), plus Good Friday, for any deadline that runs against Irish working days.

How Irish Business Days Are Defined

In Ireland, business days are Monday to Friday, less the public holidays below, Good Friday, and any weekday beside a weekend public holiday on which banks and Government offices both close. Good Friday is not a public holiday under the Organisation of Working Time Act 1997, but civil-service Circular 5/1984 lists it among the public holidays granted to civil servants and the Banking & Payments Federation Ireland's bank-holiday lists close the banks on it, so this calculator counts it as closed. Not every institution closes on the same days. The banks' lists also carry a third Christmas bank holiday, which is not a public holiday and which this calculator counts as a business day; after a Saturday public holiday they close a weekday that the calculator leaves out only where a Government department's own closure list shows it closed as well. The note on bank holidays below lists the dates. T2, the Eurosystem's real-time gross settlement system, is open Monday to Friday and, for euro settlement, also closed on 1 January, Good Friday, Easter Monday, 1 May, 25 December and 26 December (European Central Bank). Of those, 1 May is an Irish public holiday only when it is the first Monday in May: add it under Advanced options when a count must leave out T2's closing days as well.

Sources for these rules

Checked October 12, 2026. All sources

Ireland Public Holidays (Republic of Ireland)

The 10 statutory public holidays are:

  • New Year's Day (January 1)
  • St Brigid's Day (first Monday in February, except when Feb 1 is a Friday)
  • St Patrick's Day (March 17)
  • Easter Monday (variable, Monday after Easter Sunday)
  • May Day (first Monday in May)
  • June Bank Holiday (first Monday in June)
  • August Bank Holiday (first Monday in August)
  • October Bank Holiday (last Monday in October)
  • Christmas Day (December 25)
  • St Stephen's Day (December 26)

Each is a public holiday on its own date, weekend or not: the Act moves none of them, and the Workplace Relations Commission states there is no legal entitlement to have the next working day off. The Banking & Payments Federation Ireland's bank-holiday lists close the banks on the next free weekday after each weekend public holiday they cover. Government offices close it after a Sunday one (civil-service Circular 5/1984); after a Saturday one the circular only lets a department grant its staff a day off. The calculator excludes that weekday where banks and Government offices both close it, which after a Saturday holiday means a department's own closure list shows it closed, and lists it as (additional); otherwise it counts the weekday as a business day. Good Friday is not one of the ten, and the calculator excludes it too, listed as (additional): Circular 5/1984 lists it among the public holidays granted to civil servants, and the banks' lists close on it. How we determine holidays →

Sources for these dates

Checked October 12, 2026. All sources

Bank holidays this calendar counts as business days

This calendar treats as closed Ireland's ten public holidays, Good Friday, and a weekday on which banks and Government offices both close in place of a public holiday that falls on a weekend. The Banking & Payments Federation Ireland's bank-holiday list closes the banks on more weekdays than that, so a count of bank business days that runs across a date the list closes and this calendar counts as a business day has one day fewer for each such date than this calendar shows.

Bank holidays this calendar counts as business days, for every year a bank list covers:

  • Friday, December 27, 2024: Christmas bank holiday
  • Monday, December 29, 2025: Christmas bank holiday
  • Tuesday, December 29, 2026: Christmas bank holiday
  • Tuesday, December 28, 2027: Christmas bank holiday
  • Wednesday, December 29, 2027: Christmas bank holiday

No date listed here is a public holiday under the Organisation of Working Time Act 1997. Civil-service Circular 5/1984 does not close Government offices on such a date: after a Saturday public holiday it only lets a department give its staff a day off, and its list of public holidays has no third day at Christmas.

Sources: Banking & Payments Federation Ireland, Bank Holidays - Republic of Ireland 2025-2027 (in the register); Banking & Payments Federation Ireland, Bank Holidays - Republic of Ireland 2023-2025 (archived copy) (in the register); circulars.gov.ie (Government of Ireland), Circular 5/1984, Public and Privilege Holidays (in the register). Checked October 12, 2026.

Common Use Cases in Ireland

The Revenue deadlines that follow are calendar dates, not business-day counts. VAT is filed and paid by the 19th day of the month after each two-month taxable period, or the 23rd for ROS filers; an employer pays the PAYE liability within 14 days after the end of each month, or 23 days on ROS; and a company files its CT1 return and pays any tax due on or before the 23rd of the ninth month after its accounting period ends (the 21st if it does not file and pay electronically). The European Communities (Late Payment in Commercial Transactions) Regulations 2012, as amended in 2013, 2014 and 2016, set statutory late-payment interest at the ECB main refinancing rate plus 8 percentage points, running from the day after the relevant payment date; between undertakings the contract may vary the interest, provided the result is not grossly unfair to the creditor. Where the contract specifies no date or period for payment, that date falls 30 calendar days after the purchaser receives the invoice, after the goods or services are delivered where the invoice arrives first or its date of receipt is uncertain, or after an acceptance or verification procedure where one applies and the invoice arrives no later than it. The EU option of the Late Payment Interest Calculator applies the ECB main refinancing rate plus 8 percentage points, fixed each half-year. A complaint presented to the Workplace Relations Commission under section 41 of the Workplace Relations Act 2015 is not entertained more than six months after the date of the contravention it concerns (s 41(6)); an adjudication officer may entertain it up to six months later where the delay was due to reasonable cause (s 41(8)).

Sources for these rules

Checked October 12, 2026. All sources

Sources and verification

Official source: Workplace Relations Commission (workplacerelations.ie) (opens in a new tab)

Cross-checked against this source on October 7, 2026.

See all official sources →

For informational purposes only

This calculator provides general estimates based on business day counting rules. It does not constitute legal advice. Deadlines in legal, regulatory, or contractual matters may be subject to jurisdiction-specific rules, court orders, or statutory exceptions. Always verify critical deadlines with a qualified professional.

Frequently Asked Questions

What are Ireland's public holidays?
Ireland has ten public holidays under the Organisation of Working Time Act 1997: New Year's Day, St Brigid's Day, St Patrick's Day, Easter Monday, May Day, June Bank Holiday, August Bank Holiday, October Bank Holiday, Christmas Day, and St Stephen's Day. St Brigid's Day has applied since 2023 under S.I. No. 50 of 2022.
When is St Brigid's Day?
St Brigid's Day is the first Monday in February, except when February 1 falls on a Friday, in which case February 1 itself is the public holiday. S.I. No. 50 of 2022 prescribed it from 2023; its explanatory note says the day is in celebration of Imbolc/St. Brigid's day.
Does Ireland move a public holiday that falls on a weekend?
No. The Organisation of Working Time Act 1997 keeps each public holiday on its date; the employee's benefit becomes a paid day off within a month, an extra day of annual leave or an extra day's pay, and the Workplace Relations Commission states there is no legal entitlement to have the next working day off. The Banking & Payments Federation Ireland's bank-holiday lists still close the banks on the next free weekday after each weekend public holiday they cover. Government offices close it after a Sunday one (civil-service Circular 5/1984), while after a Saturday one the circular only lets a department grant its staff a day off. The calculator excludes that weekday where both close (after a Saturday holiday, where a department's own closure list shows it closed), listed as (additional), and otherwise counts it as a business day. Easter Monday, St Brigid's Day and the Monday holidays in May, June, August and October always fall on a weekday.
How does this differ from the UK calculator?
Ireland is a separate state with its own public holiday law. Its ten holidays include St Brigid's Day, St Patrick's Day, a June Bank Holiday, the first Monday of August and the last Monday of October; Good Friday is not one of them, but it is a bank holiday and a holiday granted to civil servants, so this calculator counts it as closed. The UK calculator lists the bank holidays of England and Wales, and Northern Ireland, which is part of the UK, has its own pages in the UK section of this site.
How many business days are in an Irish working year?
It depends on the year. A year has 260 to 262 weekdays, and every public holiday that falls on one, Good Friday, and every weekday banks and Government offices both close beside a weekend public holiday, takes a day out of that. This site's Ireland holiday pages for 2024 to 2028 give each year's count.

Ireland working days by month

Working-day counts, calendar grids, and Irish holidays for each of the next 13 months.