ACCA MA common mistakes
ACCA MA · Understand the traps and how to avoid them.
In a spreadsheet-built budget, the candidate enters a formula such as =B5*C5 and copies it down or across without anchoring the rate/input cell (no $ signs or named range), so the copied rows multiply by the wrong cells, and the model is submitted without any check that the total equals the sum of its components.
Spreadsheet technique is learned by copying formulas rather than by understanding relative versus absolute referencing, and under time pressure the model is never audited before answers are read off it.
What to do instead
Put all inputs (rates, inflation, growth) on a separate assumptions area and reference them with $ anchors or named ranges; build an explicit 'check' row (e.g. total = sum of components, opening + produced = sold + closing) and confirm it reads zero before extracting any figure.
When using the high-low method, the candidate selects the periods with the highest and lowest total cost rather than the highest and lowest activity level, then derives the variable cost per unit from those two points.
The technique is remembered as 'high-low' with the emphasis on cost, and in most practice data activity and cost rise together, so the error produces a plausible-looking answer and is never corrected.
What to do instead
Rank the data by activity level first, explicitly label the two chosen points as 'highest activity' and 'lowest activity', then check the resulting variable rate is sensible and that fixed cost comes out positive.
In reconciling marginal and absorption profit, the candidate multiplies closing inventory by the fixed overhead absorption rate instead of the change in inventory over the period, and/or values closing inventory without any fixed production overhead at all.
Closing inventory feels like the natural 'inventory' figure to use, and the reconciliation is memorised as a phrase rather than understood as a movement.
What to do instead
Write the rule before calculating: profit difference = (closing inventory units − opening inventory units) × fixed overhead absorption rate per unit, and absorption profit is the higher figure whenever inventory increases. Use the sign of the inventory movement as the sanity check.
In process costing, the candidate includes normal loss units in the equivalent units calculation, and/or ignores the scrap value of normal loss when arriving at the cost per equivalent unit.
Normal loss appears in the quantity statement so it is treated as an output, and scrap proceeds are mentally filed as 'other income' rather than as a reduction of process cost.
What to do instead
State two rules at the top of the answer: normal loss is never an equivalent unit; expected scrap proceeds of normal loss are deducted from process costs before dividing by equivalent units. Value abnormal loss/gain at the resulting cost per equivalent unit.
The candidate sets production equal to sales in the production budget, or adjusts for inventory in the wrong direction (adds opening inventory and deducts closing inventory).
There is an intuitive 'we make what we sell' assumption, and the inventory adjustment is recalled as a formula fragment without a physical picture of stock building up or running down.
What to do instead
Write the proforma before touching numbers: production = sales + closing inventory − opening inventory. Then test the direction on a one-line story ('if we are building stock, we must make more than we sell') and check the finished goods movement agrees with the inventory budget.
In a cash budget, the candidate deducts depreciation and other non-cash items as payments, and records credit sales in the month of sale rather than the month the cash is received.
The cash budget layout looks like an income statement, so revenue and cash are conflated and profit-type adjustments are carried across out of habit.
What to do instead
Build the budget only from receipts and payments: apply the receivables and payables settlement patterns month by month, and keep a written 'exclude' list (depreciation, bad debt write-offs, profit or loss on disposal). Remember capital purchases are cash outflows with no matching expense in the period.
The candidate labels a variance adverse when the actual figure is better than standard - most often in sales price, sales volume and material price variances - or drops a minus sign when carrying a figure into the operating statement.
The cost rule 'actual above standard is adverse' is applied mechanically to income items where the logic reverses, and signs are handled mentally rather than written down.
What to do instead
Before labelling any variance, apply the test 'did this make the business better or worse off?'. Lay out the comparison in a grid (standard × standard, standard × actual, actual × actual) so the direction falls out of which figure is larger, and write the label next to every number, including in the reconciliation.
In fixed overhead variance analysis, the candidate computes the capacity and efficiency variances using actual hours where standard hours for actual output are needed (or the reverse), and mixes up which variance measures unused capacity.
Both variances are built from hours and the two labels sound interchangeable, so the formulas are reconstructed under time pressure rather than recalled.
What to do instead
Anchor three formulas: expenditure = budgeted overhead − actual overhead; capacity = (actual hours − budgeted hours) × absorption rate; efficiency = (standard hours for actual output − actual hours) × absorption rate. Confirm capacity × efficiency reconciles to the volume variance.
The candidate computes ROI as profit ÷ sales (confusing it with net margin) or divides by an inconsistently defined capital employed, and then concludes that the division with the higher ROI is better, ignoring that a manager may reject a project earning above the cost of capital simply because it would dilute divisional ROI.
ROI is rehearsed as a formula drill rather than as a behavioural measure, and the goal-congruence point that the question is really testing is treated as background theory.
What to do instead
Write ROI = divisional operating profit ÷ capital employed, stating the basis used, and RI = profit − (notional interest rate × capital employed). On any decision question, compare the project return with the cost of capital and with the division's existing ROI separately, and state which of the two is driving the manager's accept/reject decision.
The candidate treats a single ratio or a year-on-year movement as proof of good or poor performance with no comparator, and answers an evaluation question purely with calculated ratios and no non-financial measures.
Ratio calculation is the part that gets practised, so exam technique defaults to computation and stops as soon as the numbers are on the page.
What to do instead
For every ratio, state the direction (higher or lower is better), compare it with prior year, budget or industry, give a plausible cause, and pair it with a non-financial check such as staff turnover, customer complaints or quality rejects before concluding.