ACCA PM September 2026: Planning vs Operational Variances — The 10 Discussion Marks You're Throwing Away

Half the marks in a planning and operational variance question are for the discussion, not the calculation. Most candidates nail the numbers and then write three lines about "the buyer paid too much" — and lose every one of them.

The ACCA PM examiner has said it repeatedly: in a typical 20-mark variance question, 10 marks are for the variance calculations and 10 are for discussing what they mean for performance management and decision-making. The examiner's reports also state plainly that most candidates did not know the definitions of planning and operational variances, and so those who attempted the discussion talked about all the other variances in the appendix instead — avoiding the question entirely.

That is the whole problem in one sentence. If you cannot say what a planning variance is in your own words, you cannot write the discussion, so you write about the sales volume variance instead and score nothing.

The definition that unlocks the 10 marks

A planning variance is the difference between the original standard and a revised, realistic standard. It exists because the original budget was wrong — the market moved, the exchange rate shifted, the wage award landed. Nobody operational caused it and nobody operational could have prevented it.

An operational variance is the difference between the revised standard and actual. It is the bit the manager could actually control, measured against a benchmark that was achievable on the day.

PM is a performance management paper, not a sums paper. The examiner wants you to use that split to say who is accountable and what should happen next. Consistently across reports, well-prepared candidates score very highly here, because they have something specific to say.

Worked example: what the two answers look like

Standard material price $10/kg. The market price rose to $11.50/kg after the budget was set. Actual price paid was $11.80/kg on 2,000kg.

Total price variance = ($10.00 − $11.80) × 2,000 = $3,600 A
Planning variance = ($10.00 − $11.50) × 2,000 = $3,000 A
Operational variance = ($11.50 − $11.80) × 2,000 = $600 A

The answer that scores 1 mark: "The material price variance is $3,600 adverse. This is because the purchasing manager paid more than standard. He should negotiate harder with suppliers."

The answer that scores 6: "$3,000 of the $3,600 is a planning variance. The original $10 standard was out of date the moment the market moved to $11.50, so this portion is uncontrollable and should not sit on the purchasing manager's report. The controllable operational variance is only $600 A — the manager paid $11.80 against an achievable $11.50, roughly 2.6% over market. That is the figure to appraise him on. Charging him with the full $3,600 would be demotivating and would encourage him to build slack into next year's standard."

Same numbers. Same five minutes. Five extra marks — because the second answer names the figures, allocates responsibility and states a consequence.

The trap in the other direction

Do not treat the split as automatically fair. The examiner also flags the reverse point: managers will push bad performance into the planning variance to flatter their operational results. If the question tells you the manager set or approved the revised standard, say so — a revised standard set by the person being judged is not independent, and the "uncontrollable" $3,000 may not be uncontrollable at all. That observation is worth marks on its own.

What to do before September

1. Write both definitions from memory, today. One line each. If you cannot, you will freeze on the discussion in the exam and default to describing the appendix.

2. Attempt every variance question discussion-first. Do the calculations, then force yourself to write four sentences: what the split is, who is accountable, why the original standard was wrong, what management should do. Four sentences, four marks.

3. Always quote your own numbers back. "$3,000 of the $3,600" scores. "The planning variance is significant" does not. Markers are looking for scenario-specific application, and your calculated figures are the cheapest scenario detail you have.

The bottom line

PM hit a 45% pass rate in March 2026 — its best result in around 15 years, up from 40% in December 2025. What changed was not the syllabus. It was how many candidates finally acted on the examiner's message: apply it to the scenario.

The September 2026 exams run from 7–11 September, with late entry open until 3 August. You have five weeks. Spend some of them learning to talk about your variances, not just calculate them.