ACCA FR December 2026: The Non-Controlling Interest Mistake That Costs You 4 Marks

If you're consolidating a subsidiary with a revaluation surplus, there's a good chance you're getting the non-controlling interest (NCI) figure wrong — and so is most of the cohort. ACCA's own examiner report for FR flagged this as one of the most common errors in the entire paper, and it's an easy four marks to fix once you see the pattern.

What the examiner actually found

In the most recent FR examiner's report, ACCA singled out the treatment of non-controlling interests' share of a subsidiary's revaluation surplus as one of the weakest areas in the whole sitting. Candidates were asked to calculate the correct group figure after a subsidiary revalued its property, plant and equipment post-acquisition. The most common wrong answer understated the NCI's share entirely — treating the surplus as if it belonged 100% to the parent. The second most common error went the other way, giving the NCI a share of a gain that should have been split using the group's actual ownership percentage, not an assumed 50/50 or ignored altogether.

The examiner was blunt about the underlying issue: some scripts applied proportionate consolidation instead of line-by-line consolidation — multiplying figures by the parent's ownership percentage rather than consolidating 100% of the subsidiary and then carving out the NCI's share separately. ACCA's report called this "a fundamental accounting error," not a rounding slip. If you're doing this, it isn't a technique problem — it's a conceptual gap that will cost you marks across every consolidation question in the paper, not just the one on revaluation surpluses.

The same report noted a second, related failure: candidates who got the split right often forgot to time-apportion the surplus or the subsidiary's post-acquisition results at all, either omitting the adjustment completely or applying the wrong number of months. Consolidation questions in FR are rarely testing one skill in isolation — ownership percentage, fair value uplift, and time-apportionment are usually stacked in the same adjustment, and missing any one of the three breaks the whole working.

Worked example: the wrong way vs the right way

Say a parent acquired 75% of a subsidiary two years ago. Since acquisition, the subsidiary has revalued its property upwards by $2.0m, recognised entirely in the current year.

Wrong answer #1 (100% to the group): Group revaluation surplus = $2.0m, NCI = $0. This ignores that the NCI owns 25% of the subsidiary and is therefore entitled to 25% of that gain too.

Wrong answer #2 (surplus ignored for NCI, but subsidiary proportionately consolidated): Analyst multiplies subsidiary net assets by 75% throughout, including the revaluation surplus, and never shows a separate NCI figure. This is the "fundamental accounting error" ACCA referred to — full subsidiary net assets are consolidated line by line, and NCI is a single deduction, not a running 25% haircut applied to every subsidiary line.

Correct answer: Consolidate 100% of the subsidiary's net assets, including the full $2.0m revaluation surplus. Then show NCI's share of net assets (including its 25% of that $2.0m, i.e. $0.5m) as a separate line in equity. Group revaluation surplus reserve = $1.5m (75% × $2.0m); NCI = $0.5m (25% × $2.0m). Two clean numbers, one method, no netting shortcuts.

What to do before your exam

1. Draw the NCI working every time, even in the CBE. Don't try to net percentages in your head. A simple two-line working — subsidiary net assets at 100%, NCI% applied once at the end — removes the temptation to proportionately consolidate.

2. Time-apportion before you split ownership, not after. Work out how much of the subsidiary's post-acquisition profit or surplus falls in the relevant period first, then apply the group/NCI split to that time-apportioned figure — not the full-year number.

3. Show your workings even when using the spreadsheet tool. ACCA's examiner report was explicit: the "own figure rule" only rescues an incorrect final number if the workings behind it are visible. A wrong total with clear workings can still pick up follow-through marks; a wrong total with none cannot.

Bottom line

Consolidation carries serious weight in FR, and NCI adjustments show up in some form in most sittings. ACCA's examiner reports keep flagging the same two errors — proportionate consolidation instead of full consolidation, and missing time-apportionment — because they keep happening. Fix the method once, drill it into your workings template, and this stops being a source of lost marks in your December sitting.