Strategic Business Leader · Cost and management accounting

Standard Costing and Variance Analysis for ACCA SBL

Updated 11 October 2026 · Fact-checked

Standard costing sets a planned cost and selling price per unit. Variance analysis compares actual results with that standard, splits the difference into price, usage, efficiency and volume effects, and marks each as favourable or adverse. In SBL you use variances to explain performance, find causes and recommend management action.

Understand Standard Costing and Variance Analysis

A standard cost is a carefully planned cost for one unit of output. It is built from standard quantities and standard prices for materials, labour and overheads. A budget is different. A budget is a plan for total revenue, cost and profit for a period. A standard is a unit-level benchmark. Budgets use standards, but a budget also covers volumes, cash and departments.

Variance analysis compares actual results with the standard or budget. The difference is a variance. A variance that increases profit is favourable (F). One that reduces profit is adverse (A). The aim is not to calculate numbers. The aim is to find out why results differed and who can act on it.

Standards can be ideal, attainable, current or basic. Ideal standards assume perfect conditions and often demotivate staff. Attainable standards allow for normal waste and idle time and usually motivate better. Standards should be reviewed regularly, or variances will reflect out-of-date standards rather than real performance.

Split each cost into price and quantity. Materials give a price variance and a usage variance. Labour gives a rate variance and an efficiency variance. Variable overheads work the same way. Fixed overheads give an expenditure variance and a volume variance. Sales give a price variance and a volume variance (or mix and quantity).

In SBL, the calculation is the smaller part. You need to interpret. Variances are often linked: cheap material may be cheaper but wasteful, giving a favourable price and adverse usage variance. Also ask whether variances are controllable, whether they are material, and whether standard costing suits the business. It suits repetitive production. It suits less well a fast-changing, customised or automated environment, where it may encourage the wrong behaviour.

Key rules to remember

Material price variance: (Standard price − Actual price) × Actual quantity purchased; Positive = favourable. Use quantity purchased if materials are recorded at standard on purchase; otherwise quantity used.
Material usage variance: (Standard quantity for actual output − Actual quantity used) × Standard price; Positive = favourable.
Labour rate variance: (Standard rate − Actual rate) × Actual hours paid; Positive = favourable.
Labour efficiency variance: (Standard hours for actual output − Actual hours worked) × Standard rate; Positive = favourable.
Idle time variance: Idle hours × Standard rate; Always adverse. Efficiency is then based on hours worked, not hours paid.
Variable overhead variances: Expenditure = (Standard rate × Actual hours) − Actual cost; Efficiency = (Standard hours for actual output − Actual hours) × Standard rate; Positive = favourable.
Fixed overhead expenditure variance: Budgeted fixed overhead − Actual fixed overhead; Positive = favourable.
Fixed overhead volume variance (absorption costing): (Actual output − Budgeted output) × Standard fixed overhead per unit; Positive = favourable. Not used under marginal costing.
Sales price variance: (Actual price − Standard price) × Actual units sold; Positive = favourable.
Sales volume variance: (Actual units sold − Budgeted units) × Standard profit per unit; Use standard contribution per unit under marginal costing. Positive = favourable.
Reconciliation: Budgeted profit ± sales variances ± cost variances = Actual profit; Adverse variances reduce profit.

How to solve Standard Costing and Variance Analysis questions

Use this method for any variance question, calculation or discussion.

1Read the requirement. Decide whether you must calculate, interpret, reconcile or advise. SBL usually rewards interpretation more.
2Write the standard cost card per unit. Check prices, quantities and rates are in the same units.
3Work out the flexed standard: actual output × standard quantity, hours or price.
4Calculate each variance using the formulas. Label every answer F or A.
5Check totals. The variances should reconcile budget or standard cost to actual cost or profit.
6Explain each material variance: likely cause, who is responsible, and whether it is controllable.
7Link variances together, for example a price saving that caused poor quality and extra waste.
8Finish with a recommendation: investigate, revise the standard, change supplier or process, or accept the variance, and note limits of the data.

Quickest way: The three-line grid for each cost

When to use it: Use for materials, labour and variable overhead when time is short.

Line 1: Actual quantity × Actual price.
Line 2: Actual quantity × Standard price. Line 1 minus line 2 gives the price (or rate) variance.
Line 3: Standard quantity for actual output × Standard price. Line 2 minus line 3 gives the usage (or efficiency) variance.
If actual cost is higher than the line below it, the variance is adverse. Line 1 minus line 3 must equal the total variance, which is your check.

Common mistakes in Standard Costing and Variance Analysis

Using budgeted output instead of actual output to find the standard quantity.
Students copy the budget figures from the question without flexing.
Fix: Always multiply actual units produced by the standard per unit. This gives the flexed standard.
Getting the sign wrong and calling a variance favourable when it is adverse.
Students memorise formulas without thinking about direction.
Fix: Ask whether actual cost is above or below standard. Higher cost is adverse. For sales, higher revenue or profit is favourable.
Treating variances in isolation.
Calculation practice trains students to produce numbers, not explanations.
Fix: Look for connected variances, such as a favourable material price with an adverse usage variance, and discuss the trade-off.
Using hours paid for labour efficiency when idle time exists.
Students overlook the idle time given in the question.
Fix: Rate variance uses hours paid. Efficiency uses hours worked. Idle time is a separate adverse variance.
Blaming the department with the variance without checking controllability.
Students assume the variance appears where the cause lies.
Fix: A usage variance may start with poor purchasing quality. A labour variance may start with poor materials. Trace the root cause before assigning blame.
Listing generic reasons that do not use the scenario.
Students learn standard textbook causes.
Fix: Tie every explanation to facts in the case: supplier change, new machinery, wage rises, demand shifts. This earns the application and professional skills marks.

Worked examples

Example 1

A company makes a product with a standard of 4 kg of material at $5 per kg per unit. In the month it made 1,000 units and used 4,200 kg, buying and using 4,200 kg at a total cost of $19,740. Calculate the material price and usage variances and comment.

Show the solution

Actual price per kg = 19,740 ÷ 4,200 = $4.70.
Price variance = (5.00 − 4.70) × 4,200 = $0.30 × 4,200 = $1,260 F.
Standard quantity for actual output = 1,000 × 4 = 4,000 kg.
Usage variance = (4,000 − 4,200) × $5 = 200 × $5 = $1,000 A.
Check: standard cost of actual output = 4,000 × 5 = $20,000. Actual cost = $19,740. Total variance = $260 F. Also 1,260 F − 1,000 A = $260 F.
Comment: the price saving may reflect cheaper, lower-quality material that caused extra waste. Management should check whether the saving is real after waste is included. Here the net result is only slightly favourable.

Answer: Material price variance $1,260 F; material usage variance $1,000 A; total material variance $260 F. The two variances may be linked through material quality.

Example 2

A product has a standard of 2 labour hours at $12 per hour per unit. In a period, 500 units were made. Workers were paid for 1,100 hours at a total of $13,750. Of these, 50 hours were idle. Calculate the labour rate, idle time and efficiency variances.

Show the solution

Actual rate = 13,750 ÷ 1,100 = $12.50 per hour.
Rate variance = (12.00 − 12.50) × 1,100 = $550 A.
Idle time variance = 50 × $12 = $600 A.
Hours worked = 1,100 − 50 = 1,050.
Standard hours for actual output = 500 × 2 = 1,000.
Efficiency variance = (1,000 − 1,050) × $12 = $600 A.
Check: standard cost = 1,000 × 12 = $12,000. Actual cost = $13,750. Total variance = $1,750 A. Also 550 + 600 + 600 = $1,750 A.
Comment: a higher rate may reflect overtime or more skilled staff. Idle time may come from machine breakdown or material shortage. Efficiency may be hit by inexperienced or demotivated staff, so ask why.

Answer: Labour rate variance $550 A; idle time variance $600 A; labour efficiency variance $600 A; total labour variance $1,750 A.

Exam tips

Do not spend most of your time on calculations. Calculate quickly, then explain causes, links and actions using scenario facts.
Label every variance F or A and show the formula line so you can pick up method marks even with arithmetic errors.
Cover the limits of standard costing: out-of-date standards, automation, a focus on cost over quality, and short-term behaviour.
Discuss controllability and materiality. Say which variances deserve investigation and why.
Present advice in the format asked for, such as a report or briefing note, for professional skills marks.

Practice questions from Cost and management accounting

Standard Costing and Variance Analysis in other exams

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

Standard Costing and Variance Analysis: frequently asked questions

How do I calculate material price and usage variance?

Price variance is (standard price − actual price) × actual quantity. Usage variance is (standard quantity for actual output − actual quantity used) × standard price. A positive result is favourable and a negative result is adverse.

What is the difference between standard costing and budgeting?

A standard is a planned cost or price for one unit. A budget is a plan for total income, costs and profit for a period. Budgets are often built from standards, but budgets also cover volumes and departments.

How are variances examined in SBL?

SBL is a written case study, so variances appear as data inside a scenario. You are asked to interpret them, link causes and advise management. The calculations are usually simple.

Should I investigate every variance?

No. Investigate variances that are material, recurring, trending, or controllable. Small random variances cost more to investigate than they are worth.