Calculate a direct-material usage variance
Compare actual material used with the standard quantity allowed for actual output, valued at the standard price.
Section 4.2 · Standard costing
Cambridge International AS & A Level Accounting 9706, 2026–2028 syllabus, Version 2. Topic 4.2 teaches standard costing, the listed material, labour, fixed-overhead and sales variances, their causes and relationships, and evidence-based business decisions. Practice is self-checked, not an official Cambridge grade. Full timed Papers 1–4 and human subject-teacher review remain outstanding.
Before you begin
- Use Topic 2.1–2.2 cost behaviour, contribution and absorption-costing ideas. In each question, identify the period, actual output, budget and standard before calculating a variance.
Work on paper. Try each question before revealing help, and explain why your method works.
Quick readiness check
How do you find standard quantity allowed?
What you will learn
- Find the standard quantity allowed
- Calculate the material usage variance
- Explain how usage differs from price
Value the quantity difference at the standard price
Standard quantity allowed = standard material per unit × actual output. Material usage variance = (standard quantity allowed − actual quantity used) × standard price. A positive saving is favourable under this convention; excess use is adverse.
Using the standard price isolates the cost effect of using more or less material. It prevents the price change from being counted again in the usage result.
Material usage variance = (SQ allowed − AQ used) × SP
Usage needs operational evidence
Excess usage may arise from poor-quality inputs, damage, machine settings, inexperienced staff, inaccurate cutting, theft, rework or a standard that no longer reflects the process. A favourable result may reflect less waste, but it could also mean underfilling, thinner product or lower quality.
Check output, rejects, scrap, rework and specification as well as the variance amount. A quantity difference in kilograms or metres is not a cost variance until it is valued at the stated standard price.
Pause and explain
Allowed quantity is 4,800 kg, actual use is 4,700 kg and SP is $2.50/kg. What is the usage variance?
Worked example
A product standard is 3 kg per unit at $4/kg. Actual output is 700 units and 2,150 kg were used. Calculate the usage variance.
Show the worked solution
- Allowed quantity = 3 × 700 = 2,100 kg.
- Actual use is 50 kg above allowance.
- Value the excess at standard price: 50 × $4 = $200 adverse.
Answer $200 adverse material usage variance.
Try a topic test
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Test this topic →From guided practice to a new situation
Write your answer and reasoning first. Use a hint only if you are stuck. The model solution is for self-checking; your written work is not automatically marked.
Standard is 0.8 kg per unit; output is 2,000 units; actual use is 1,650 kg; SP is $7/kg. Calculate the variance.
Give me a hint
Compute the allowed quantity before applying the standard price.
Compare my reasoning
- Allowed = 0.8 × 2,000 = 1,600 kg.
- Actual use exceeds allowance by 50 kg.
- 50 × $7 = $350 extra cost.
$350 adverse material usage variance.
Look for these in your work
- Allowed quantity is 1,600 kg
- Excess use is 50 kg
- Value at SP and label adverse
A garment standard allows 2.4 metres per item. Output is 1,500; actual usage is 3,580 metres; SP is $5.50/metre. Calculate usage variance.
Give me a hint
Find the quantity allowance for the actual 1,500 items.
Compare my reasoning
- Allowed quantity = 1,500 × 2.4 = 3,600 metres.
- Actual usage is 20 metres below allowance.
- 20 × $5.50 = $110 saving.
$110 favourable material usage variance.
Look for these in your work
- Allowed quantity correct
- 20-metre saving identified
- Value at standard price
A bakery reports favourable flour usage after reducing loaf weight below its advertised specification. How should the manager interpret it?
Give me a hint
Financial usage is only one measure; check whether output met the promised standard.
Compare my reasoning
- The usage calculation may show a financial saving per unit.
- Underweight loaves can breach customer expectations and lead to complaints, refunds or regulatory consequences.
- The manager should restore compliance and consider quality outcomes before claiming improved performance.
The variance is favourable only on the quantity-cost measure. It is not a sound improvement if the bakery fails its product specification; check weights, quality and customer outcomes.
Look for these in your work
- Financial direction accurately named
- Specification risk explained
- Recommendation protects quality
Common mistakes
- Using actual price rather than standard price
- Using planned output rather than actual output
- Treating purchases as material used when inventory changed
What can you explain now?
Which price values the material usage variance?
Compare with the explanation
Standard price
The standard price isolates the cost effect of the quantity difference.
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Make it stick
Why is the standard quantity allowed based on actual output rather than the original budget?
If you needed the solution, close it and solve the problem again from a blank page. A correct answer is stronger when you can explain the reason for each step.