Groups that have grown organically or through acquisition often end up with subsidiaries on different fiscal year calendars. A parent with a December year-end may own a subsidiary reporting to March, another to June, and an acquired business with a September year-end. Each entity closes its own books on its own schedule. The consolidation has to produce group financial statements for one consistent period — and the question is how to get there correctly.
The answer is not simply to pro-rate the subsidiary’s annual figures. That approach is both technically incorrect under IFRS and produces unreliable results for any business with seasonal revenue. What IFRS 10 actually requires — and what the practical alternatives look like — is what this post covers.
What IFRS 10 Actually Says
IFRS 10, paragraphs B92 and B93, addresses subsidiaries with reporting dates different from the parent. The standard establishes a hierarchy of approaches:
The preferred approach: Prepare additional financial statements for the subsidiary as at the parent’s reporting date. This means the subsidiary runs a supplementary close at the parent’s year-end — producing a set of figures for exactly the same period as the parent’s consolidation. These are typically internal management accounts rather than audited statutory accounts, but they need to be prepared to the same standard as if they were.
The permitted fallback: Where it is impracticable to prepare statements as at the parent’s date, the subsidiary’s most recent financial statements can be used — provided the difference between the subsidiary’s reporting date and the parent’s does not exceed three months. This is a hard limit, not a guideline. A subsidiary with a September year-end used in a December parent consolidation (a three-month gap) is within the permitted boundary. A subsidiary with a June year-end used in a December consolidation (a six-month gap) is not — additional statements as at December would be required.
The adjustment requirement: Even when the fallback is used, IFRS 10.B93 requires adjustments to the subsidiary’s figures for the effects of significant transactions or events occurring between the subsidiary’s reporting date and the parent’s. “Significant” requires judgement, but the standard makes clear that material items cannot be ignored on the basis that they fall in the gap period.
🚩 Why pro-rating is incorrect: Taking a proportion of a subsidiary’s annual figures (e.g., 6/12 of full-year revenue for a six-month overlap period) assumes that activity is evenly distributed across the year. For almost every real business — particularly retail, hospitality, construction, and professional services — it isn’t. A subsidiary earning 60% of its annual revenue in Q4 will have its contribution materially understated if six months of annual figures are used rather than actual period figures. IFRS does not permit mechanical pro-rating as a substitute for actual period data.
The Three Practical Approaches
Approach 1: Align the subsidiary’s year-end to the parent’s
The cleanest long-term solution. If a subsidiary can change its statutory year-end to match the parent’s, the problem disappears permanently. This typically requires approval from the relevant tax authority and company registrar, and may trigger a short accounting period in the transition year — with its own tax and audit implications.
For significant subsidiaries where the mismatch creates material consolidation effort every year, this is the correct investment to make. For small, immaterial subsidiaries in jurisdictions with complex regulatory requirements for year-end changes, the cost-benefit may not justify it.
Approach 2: Prepare interim financial statements at the parent’s year-end
The subsidiary prepares a supplementary set of management accounts for the 12-month period ending on the parent’s reporting date. These are not statutory accounts — they don’t need to be audited or filed — but they need to be prepared to the same accounting policies as the statutory accounts and with sufficient rigour that the finance team can stand behind them.
This is the most accurate approach and is required by IFRS 10 where the fallback is not available. The cost is a partial-year close process for the subsidiary — which adds to finance team workload, particularly if the subsidiary’s own year-end is close in time to the parent’s and the team is already managing two close processes within a short window.
Example Parent: December year-end. Sub A: March year-end.
Sub A prepares its statutory accounts for April–March. It also prepares internal management accounts for January–December (the parent’s period). The January–December accounts are used for consolidation. The gap period (January–March) is captured in the management accounts but falls outside the statutory accounts — the finance team must ensure the January–March figures in the management accounts reconcile to the opening position of Sub A’s next statutory period.
Approach 3: Use the subsidiary’s most recent year-end with gap adjustments
Where the gap between the subsidiary’s year-end and the parent’s does not exceed three months, IFRS 10.B92 permits use of the subsidiary’s most recent financial statements — provided adjustments are made for significant events in the gap period.
Example Parent: December year-end. Sub B: September year-end (three-month gap — within the permitted limit).
The September trial balance is used as the starting point. The finance team then reviews the October–December period for significant events: a material acquisition, a large customer contract, a restructuring charge, a significant FX movement, or any item that would materially change the picture if excluded. Each identified item is adjusted into the consolidation for the gap period.
Identifying Gap Period Events That Require Adjustment
The adjustment requirement is where judgement is applied. IFRS 10.B93 doesn’t define a threshold — it requires that adjustments be made for “significant” transactions and events. In practice, the finance team needs a documented policy that defines what triggers an adjustment for each group.
Events that typically require gap-period adjustment:
- Acquisitions or disposals: A subsidiary acquiring a business unit or disposing of a significant asset in the gap period cannot be excluded — the group’s asset position at the parent’s year-end would be materially different from what the subsidiary’s own year-end statements show
- Material revenue contracts: A large contract commencing, terminating, or being recognised in the gap period — particularly where the subsidiary has lumpy revenue from a small number of customers
- Restructuring or impairment: A restructuring charge or impairment recognised in the gap period, or conversely, a reversal of a provision that no longer applies
- Significant FX movements: Where a subsidiary has material monetary items in a foreign currency, a significant rate movement in the gap period will affect its retranslated balance sheet position
- Intercompany transactions: Any intercompany flows in the gap period that need to be eliminated from the consolidated result — particularly relevant where the parent has traded with the subsidiary in the gap period and those flows don’t appear in the subsidiary’s submitted trial balance
💡 Documenting the policy: Auditors will ask how the group determined what constitutes a significant gap-period event and what adjustments were made. A documented threshold — for example, any single item exceeding 5% of the subsidiary’s revenue or net assets — applied consistently each period is more defensible than a case-by-case judgement made at each close.
The Intercompany Complication
Different year-ends create a specific intercompany matching problem. Intercompany transactions that occur in the gap period — between the subsidiary’s year-end and the parent’s — may appear in the parent’s consolidation period but not in the subsidiary’s submitted trial balance.
Example Parent year-end: December. Sub C year-end: September (three-month gap). In November — within the gap period — the parent charges Sub C a $50,000 management fee. This appears in the parent’s own trial balance as management fee income. Sub C’s September trial balance predates this charge. In the consolidation, the management fee income sits in the parent but the matching expense is absent from Sub C — the elimination has nothing to eliminate against on Sub C’s side.
The adjustment for this gap-period intercompany transaction needs to be posted manually: recognising the $50,000 management fee expense in Sub C’s consolidation contribution for the gap period, then eliminating both sides.
Choosing the Right Approach for Each Subsidiary
| Scenario | Recommended approach |
|---|---|
| Gap ≤ 3 months, subsidiary is not material, few gap-period events | Fallback: use latest year-end with gap adjustments. Document the policy. |
| Gap ≤ 3 months, subsidiary is material or has high gap-period activity | Interim financial statements at parent’s year-end for accuracy |
| Gap > 3 months (any size subsidiary) | Interim financial statements required — IFRS fallback not available |
| Recurring misalignment creating significant annual effort | Align the subsidiary’s year-end to the parent’s — once-off cost, permanent fix |
BrizoConsol supports flexible period configuration — entities can be set to submit trial balance data for any defined period, independent of their statutory year-end, so the consolidation can pull the correct period from each entity without being locked to fiscal year boundaries. Learn more or see it in action →