Management Accounting · Monitoring performance and reporting

Material, Labour and Overhead Variances for ACCA MA

Updated 11 October 2026 · Fact-checked

A variance is the difference between standard cost and actual cost, split into price and quantity causes. For materials: price and usage. For labour: rate and efficiency. For overheads: variable expenditure and efficiency, and fixed expenditure. Compare actual with standard for actual output, then label each result favourable or adverse.

Understand Material, Labour and Overhead Variances

A standard cost is the planned cost of one unit. A variance is the gap between what output should have cost and what it did cost. Managers use variances to see where performance moved away from plan.

Each cost is split into two questions. Did we pay more or less per unit of input? That is the price, rate or expenditure question. Did we use more or less input than we should have for the output made? That is the usage or efficiency question. Splitting the total stops one effect hiding the other.

The key idea is that quantity variances are always measured against the standard input allowed for actual output. You do not compare with budgeted output. If you made 1,000 units and the standard is 3 kg per unit, the allowed usage is 3,000 kg, whatever the budget said.

A favourable (F) variance increases profit compared with standard. An adverse (A) variance reduces it. Variances are often linked. Cheap material may cause more waste (favourable price, adverse usage). Hiring cheaper, less skilled labour may give a favourable rate variance but an adverse efficiency variance.

For overheads, variable overhead works like labour, usually tied to labour hours. Fixed overhead does not change with activity, so the expenditure variance compares actual fixed overhead with budgeted fixed overhead. In absorption costing there are also volume variances, but the core Applied Knowledge focus is on expenditure.

Key formulas to remember

Material price variance: (Standard price − Actual price) × Actual quantity purchased; Positive = favourable. If purchases differ from usage, use quantity purchased (when stock is held at standard price).
Material usage variance: (Standard quantity for actual output − Actual quantity used) × Standard price; Positive = favourable. Value at standard price, not actual price.
Labour rate variance: (Standard rate − Actual rate) × Actual hours paid; Equivalent: (Standard rate × Actual hours) − Actual labour cost.
Labour efficiency variance: (Standard hours for actual output − Actual hours worked) × Standard rate; Positive = favourable. Use hours worked if idle time is separated.
Variable overhead expenditure variance: (Standard rate × Actual hours) − Actual variable overhead; Positive = favourable.
Variable overhead efficiency variance: (Standard hours for actual output − Actual hours) × Standard variable overhead rate; Same hours difference as labour efficiency.
Fixed overhead expenditure variance: Budgeted fixed overhead − Actual fixed overhead; Positive = favourable (spent less than budget).
Total check: Standard cost of actual output − Actual cost = Sum of the variances; Use to check your answers add up.

How to solve Material, Labour and Overhead Variances questions

Use the same routine for every variance question. It stops you mixing quantities and prices.

1Write down the actual output and the standard cost card (quantity or hours per unit, and price or rate per unit).
2Calculate the standard input allowed for actual output: actual output × standard input per unit.
3Pick out the actual quantity, actual price and actual cost from the question. Note whether quantities are purchased, used, paid or worked.
4Calculate the price variance: what the actual quantity should have cost at standard price, less what it actually cost.
5Calculate the quantity variance: (standard input allowed − actual input) × standard price.
6Label each answer F or A. Positive means actual was better than standard, so favourable.
7Check that the variances add up to the total cost variance, then write one line of interpretation if asked.

Quickest way: The variance box method

When to use it: Use it for number entry and multiple choice questions where speed matters and you have to produce one variance quickly.

Draw three values in a row: Actual quantity × Actual price, Actual quantity × Standard price, Standard quantity × Standard price.
The difference between the first two is the price (or rate, or expenditure) variance.
The difference between the last two is the usage (or efficiency) variance.
If the left value is higher than the one to its right, the variance is adverse. If lower, favourable.
For fixed overhead, just compare budget with actual.

Common mistakes in Material, Labour and Overhead Variances

Using budgeted output instead of actual output to find the standard quantity.
Students are used to budgets, where budgeted volume is the base.
Fix: Always compute standard input as actual units produced × standard per unit before any usage or efficiency calculation.
Valuing usage or efficiency variances at the actual price or rate.
The actual price is the number on the page and feels natural to use.
Fix: Quantity variances use standard price or rate. The price effect is already captured in the price variance.
Getting the sign wrong, calling a favourable variance adverse.
Students subtract in the wrong order.
Fix: Ask: did we spend less than we should, or use less than we should? If yes, favourable. Write the sign before moving on.
Using quantity used instead of quantity purchased for the material price variance.
The two figures are often the same, so the difference is overlooked.
Fix: Check whether the question gives purchases and usage separately. Price variance uses purchases when stock is valued at standard.
Treating fixed overhead as if it varied with hours, giving a fixed efficiency variance.
Students copy the variable overhead method.
Fix: For fixed overhead expenditure, only compare budgeted with actual cost. Activity does not change the budgeted amount.
Ignoring idle time when hours paid differ from hours worked.
Students use one hours figure for both variances.
Fix: Rate variance uses hours paid. Efficiency uses hours worked. The gap is idle time.

Worked examples

Example 1

A company makes 2,000 units. The standard is 4 kg of material per unit at $5 per kg. It bought and used 8,400 kg and paid $42,840. Calculate the material price and usage variances.

Show the solution

Standard quantity for actual output = 2,000 × 4 = 8,000 kg.
Actual price per kg = $42,840 ÷ 8,400 = $5.10.
Price variance = (5.00 − 5.10) × 8,400 = −$840, so $840 adverse.
Usage variance = (8,000 − 8,400) × $5 = −$2,000, so $2,000 adverse.
Check: standard cost 8,000 × $5 = $40,000. Actual $42,840. Difference $2,840 adverse = 840 + 2,000.

Answer: Material price variance $840 adverse; material usage variance $2,000 adverse.

Example 2

A product has a standard of 2 labour hours per unit at $12 per hour, with variable overhead at $3 per labour hour. Actual output was 1,500 units. Workers were paid for 3,100 hours, all worked, at a total cost of $36,580. Actual variable overhead was $9,000. Budgeted fixed overhead was $20,000 and actual was $21,200. Calculate labour rate, labour efficiency, variable overhead expenditure, variable overhead efficiency and fixed overhead expenditure variances.

Show the solution

Standard hours for actual output = 1,500 × 2 = 3,000 hours.
Labour rate: standard cost of 3,100 hours = 3,100 × 12 = $37,200. Actual $36,580. Variance = 37,200 − 36,580 = $620 favourable.
Labour efficiency: (3,000 − 3,100) × $12 = −$1,200, so $1,200 adverse.
Variable overhead expenditure: 3,100 × $3 = $9,300. Actual $9,000. Variance = $300 favourable.
Variable overhead efficiency: (3,000 − 3,100) × $3 = −$300, so $300 adverse.
Fixed overhead expenditure: budget 20,000 − actual 21,200 = −$1,200, so $1,200 adverse.

Answer: Labour rate $620 F; labour efficiency $1,200 A; variable overhead expenditure $300 F; variable overhead efficiency $300 A; fixed overhead expenditure $1,200 A.

Exam tips

In Section A, read whether the question asks for the amount or the label. Number entry questions often need the sign or the words favourable or adverse.
Write the standard input allowed for actual output first. Most wrong answers start with this figure.
Watch the units: kg purchased versus used, hours paid versus worked. Underline them in the question.
For multiple response questions, test each statement against interrelationships, such as cheap material causing adverse usage.
In Section B, show the check that the variances sum to the total cost variance. It catches errors and costs little time.

Practice questions from Monitoring performance and reporting

Material, Labour and Overhead Variances in other exams

The same ground in other exams, if you are preparing for more than one or want another angle on it.

Material, Labour and Overhead Variances: frequently asked questions

What is the difference between material price variance and usage variance?

The price variance shows the effect of paying a different price per unit from standard. The usage variance shows the effect of using more or less material than the standard allowed for actual output. Price uses actual quantity, usage uses standard price.

How do I calculate labour rate and efficiency variance?

Rate variance is standard rate minus actual rate, multiplied by hours paid. Efficiency variance is standard hours for actual output minus actual hours worked, multiplied by the standard rate. A positive answer is favourable.

How is the fixed overhead expenditure variance explained?

It compares budgeted fixed overhead with actual fixed overhead. If you spent less than budget, it is favourable. Fixed costs do not change with output, so no flexing is needed.

Why do variable overhead and labour efficiency variances use the same hours?

Variable overhead is usually absorbed on labour hours. So the hours saved or wasted drive both variances. Only the standard rate differs: labour rate for labour, variable overhead rate for overhead.