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How to Change an Irish Company’s Financial Year-End

Change an Irish company’s financial year-end using Form B83. Understand the 18-month cap, five-year rule, on-time return requirement and ARD interaction.

13 August 202612 min read
Irish company calendar and financial statements moving from an old accounting year-end to a new compliant date

An Irish company may alter its financial year-end by filing Form B83 with the Companies Registration Office. The change is subject to statutory limits: the resulting financial year cannot exceed 18 months, the company’s annual return must be on time, and the option is generally available only once in five years.

Financial year-end and Annual Return Date are different. Form B83 changes the accounting reference period. It does not automatically move the CRO Annual Return Date (ARD), and the accounts attached to a later B1 still must satisfy the filing-period rules.

Financial year-end versus ARD

DateWhat it controlsRelevant CRO route
Financial year-endEnd of the accounting period covered by financial statementsForm B83 to alter it
Annual Return DateDate to which the B1 annual return is made upB1/B73 or other applicable ARD procedure
B1 filing deadlineLast date for delivering the annual returnCurrently 56 days after the ARD

Why companies change their year-end

Common reasons include aligning an Irish subsidiary with a group reporting date, moving away from a seasonal trading peak, matching management reporting, preparing for investment or acquisition, or creating a more efficient audit timetable. A convenient commercial date still must fit the Companies Act, CRO and Revenue requirements.

Core B83 conditions

  • the company is altering its financial year-end under section 288;
  • the new financial year will not exceed 18 months;
  • the annual return with which the change is associated is filed on time;
  • Form B83 is not used to rescue a late annual return;
  • the company has not used the ordinary alteration power within the previous five years, unless an applicable group exception applies;
  • the relationship between the new year-end, ARD and accounts remains compliant.

Check the current filing timeline

Confirm the company’s ARD, latest annual return and available financial periods before modelling a new year-end.

Search by legal company name or CRO registration number.

The 18-month maximum

The CRO states that a company may alter its financial year-end subject to the new financial year not exceeding 18 months. A proposed extension that produces a period longer than 18 months is not cured by business convenience or group preference. Model the period from its legal start date to the proposed end date precisely.

The company’s first financial year also begins on incorporation and must end no more than 18 months later.

The nine-month accounts rule

The CRO warns that there can be no more than nine months between the ARD and the financial-statements date attached to the subsequent B1. Changing the accounting date without modelling the ARD can therefore create a filing problem. A twelve-month gap between the new ARD and the accounts is not acceptable merely because both dates look tidy.

A practical planning workflow

  1. confirm incorporation date, current year-end, ARD and B1 deadline;
  2. check whether the latest return is on time and whether B83 has been used in the last five years;
  3. identify the commercial and group-reporting reason for the change;
  4. calculate the exact length of the shortened or extended financial period;
  5. test the nine-month relationship between accounts and the relevant ARD;
  6. review audit, tax, banking, covenant and shareholder consequences;
  7. approve the change through the company’s proper decision process;
  8. complete Form B83 and the associated filing accurately;
  9. update the accounts-production, audit and Revenue calendar;
  10. verify the registered filing and future timetable.

When the five-year rule may not apply

The CRO identifies an exception where the company is a subsidiary or holding undertaking of another EEA undertaking. The exception is technical and should not be assumed merely because companies share an owner or brand. Confirm the statutory group relationship and obtain professional advice before relying on it.

Tax and operational consequences

A changed accounting period can affect corporation-tax return periods, preliminary tax, loss calculations, audit scheduling, budgets, dividend planning and lender reporting. CRO acceptance does not by itself confirm the Revenue treatment or amend a contract. Coordinate company-secretarial, accounting and tax work before filing.

Common B83 mistakes

  • confusing the financial year-end with the ARD;
  • trying to file B83 with a late return;
  • creating a period longer than 18 months;
  • overlooking the nine-month relationship to the ARD;
  • using the alteration more than once in five years without a valid exception;
  • changing the CRO timetable but not the Revenue, audit or banking calendar;
  • assuming a parent and subsidiary automatically qualify for the EEA group exception.

For the annual-return timetable itself, see how to find a company’s ARD and Irish annual-return deadlines.

Review prior financial periods

A company report can organise available annual returns and financial-period information before you model a new timetable. Confirm the live CRO record and obtain professional advice before filing B83.

View company reports

Official sources

Use the CRO’s current financial year-end guidance, annual-return guidance and Form B83 listing. This article is general information, not accounting, legal or tax advice.

Frequently Asked Questions

How does an Irish company change its financial year-end?
The company files Form B83 with the CRO, subject to section 288 conditions, an on-time annual return, the 18-month maximum financial period and the general once-in-five-years restriction.
Can Form B83 be filed with a late annual return?
No. The CRO states that B83 can only be filed where the annual return is on time and cannot be filed in respect of a late return.
How long can the new financial year be?
The new financial year must not exceed 18 months.
Is financial year-end the same as Annual Return Date?
No. The financial year-end closes the accounting period, while the ARD is the date to which the B1 is made up. Changing one does not automatically change the other.
How often can a company change its financial year-end?
The ordinary B83 alteration is generally available once in every five years. The CRO identifies a group-related exception for certain EEA holding and subsidiary undertakings.

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