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Management Accounting · Budgetary control and reporting

Budget Variances and Their Interpretation

Updated 11 October 2026 · Fact-checked

A budget variance is the difference between a budgeted figure and the actual figure. Compare like with like, usually after flexing the budget to actual activity. Label it favourable (F) if it increases profit and adverse (A) if it reduces profit. Then suggest likely causes and who can control them.

Understand Budget Variances and Their Interpretation

A budget is a plan. Actual results show what happened. A variance is the gap between the two. Management uses variances to see where performance differed from plan, so it can act on the causes.

Every variance is either favourable (F) or adverse (A). Favourable means the difference increases profit compared with the budget. Adverse means it reduces profit. The label is about the effect on profit, not whether the number is bigger or smaller. Actual revenue above budget is favourable. Actual cost above budget is adverse.

The comparison must be fair. If actual sales volume was 12,000 units but the budget was for 10,000, the actual costs will naturally be higher. Comparing them directly tells you little. So for costs you first prepare a flexed budget: the budget costs restated for the actual activity level. Fixed costs stay the same. Variable costs change in proportion to activity.

The variance is then split in two. The sales volume variance (or profit variance due to volume) shows the effect of selling more or fewer units than planned. The remaining variances compare actual results with the flexed budget and show efficiency and price effects.

Interpreting a variance means suggesting why it happened. A favourable material cost variance might come from a cheaper supplier, or from poor-quality material that causes problems elsewhere. Variances can be linked. Always ask who is responsible and whether the cause was controllable.

Key formulas to remember

Basic variance
Variance = Actual − Budget (or flexed budget)
Then decide F or A by the effect on profit, not by the sign.
Revenue or profit variance rule
Actual revenue or profit higher than budget = F; lower = A
Higher income increases profit.
Cost variance rule
Actual cost higher than budget = A; lower = F
Higher cost reduces profit.
Flexed budget cost
Flexed variable cost = Budget variable cost per unit × actual units; fixed cost unchanged
Flex only variable costs. Fixed costs stay at the original budget.
Sales volume profit variance
(Actual units − Budget units) × standard profit per unit
Use standard contribution per unit if marginal costing is used. Use standard profit per unit if absorption costing is used. More units than budget is F.
Sales price variance
Actual revenue − (Actual units × budget price)
Positive result is F.

How to solve Budget Variances and Their Interpretation questions

Use this method for any question that asks you to calculate and interpret budget variances.

  1. 1Read the question and note whether it uses marginal or absorption costing, and whether a flexed budget is required.
  2. 2List the original budget figures and the actual figures side by side, including budget and actual units.
  3. 3Flex the budget: multiply budgeted variable cost per unit by actual units. Keep fixed costs at the original budget.
  4. 4Compare actual with the flexed budget for each cost and for sales revenue. Work out the difference.
  5. 5Label each difference F or A by asking: does this increase or reduce profit?
  6. 6Calculate the sales volume variance separately, using budget profit or contribution per unit, if the question asks for it.
  7. 7Suggest a sensible cause for each major variance, and say whether it is controllable.
  8. 8Check that the variances reconcile: the total of the variances should equal the difference between budget profit and actual profit.

Quickest way: Flex, subtract, label

When to use it: Use this for multiple choice and number entry questions where you need one variance quickly.

  1. Find the right comparison figure: flexed budget for costs, budget price for sales price.
  2. Subtract the smaller from the larger to get the amount.
  3. Ask: is this extra income, lower cost (F), or lower income, extra cost (A)?
  4. Check the answer format: some number entry questions want the amount only, others want the F or A as well.
  5. Eliminate options that have the right amount but the wrong label.

Common mistakes in Budget Variances and Their Interpretation

  • Comparing actual costs with the original budget when activity level differs.

    It looks quicker and the budget figure is already given.

    Fix: Flex the variable costs to actual output first. Then compare.

  • Labelling variances by size instead of effect on profit.

    Students assume bigger actual means favourable.

    Fix: For revenue, higher is F. For costs, higher is A. Ask what happens to profit.

  • Flexing fixed costs.

    Students apply the per-unit approach to every cost line.

    Fix: Fixed costs stay at the budgeted total, whatever the activity within the relevant range.

  • Using selling price per unit instead of profit or contribution per unit for the sales volume variance.

    The sales volume variance is confused with a revenue variance.

    Fix: Multiply the unit difference by standard profit (absorption) or contribution (marginal) per unit.

  • Treating every variance as management's fault.

    Students focus on the calculation and skip interpretation.

    Fix: State a likely cause, and note whether it is controllable. Price rises set by suppliers are often outside the manager's control.

Worked examples

Example 1

A company budgeted to sell 1,000 units at $50 each, with variable cost of $30 per unit and fixed costs of $8,000. Actual sales were 1,200 units at $48 each. Actual variable costs were $38,400 and actual fixed costs were $8,500. Calculate the sales price variance, the variable cost variance (against the flexed budget), the fixed cost variance and the sales volume contribution variance.

Show the solution
  1. Sales price variance: actual revenue = 1,200 × $48 = $57,600. Revenue at budget price = 1,200 × $50 = $60,000. Difference = $2,400 lower, so adverse.
  2. Flexed variable cost = 1,200 × $30 = $36,000. Actual variable cost = $38,400. Difference = $2,400 higher, so adverse.
  3. Fixed cost variance: actual $8,500 against budget $8,000 = $500 higher, so adverse.
  4. Budget contribution per unit = $50 − $30 = $20. Sales volume variance = (1,200 − 1,000) × $20 = $4,000, favourable.

Answer: Sales price $2,400 A; variable cost $2,400 A; fixed cost $500 A; sales volume contribution $4,000 F.

Example 2

Using the data from the first example, calculate the budgeted profit and actual profit. Show that the variances reconcile, and suggest one likely cause for the adverse sales price variance.

Show the solution
  1. Budget profit = (1,000 × $20) − $8,000 = $20,000 − $8,000 = $12,000.
  2. Actual profit = $57,600 − $38,400 − $8,500 = $10,700.
  3. Difference = $12,000 − $10,700 = $1,300 lower, so total adverse $1,300.
  4. Add the variances: +$4,000 − $2,400 − $2,400 − $500 = −$1,300. This matches.
  5. A likely cause of the price variance: the company cut the selling price to win extra volume. This fits the favourable volume variance.

Answer: Budget profit $12,000; actual profit $10,700; net variance $1,300 adverse. The reconciliation works. The adverse price variance was probably caused by discounting to increase sales volume.

Exam tips

  • Read whether the question wants the amount only, or the amount and F or A. Number entry boxes can reject extra text.
  • In multiple response questions about causes, pick only options that logically produce the stated variance direction.
  • Always flex before comparing costs. If the activity level is the same as the budget, no flexing is needed.
  • Check the total: variances should add up to the profit difference. A quick check catches sign errors.
  • When interpreting, link variances: a discount can cause adverse price but favourable volume.

Practice questions from Budgetary control and reporting

Budget Variances and Their Interpretation in other exams

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

Budget Variances and Their Interpretation: frequently asked questions

How do I know if a variance is favourable or adverse?

Ask whether it increases or reduces profit compared with the budget. Higher revenue or lower cost is favourable. Lower revenue or higher cost is adverse.

Why do I need to flex the budget?

Actual costs depend on the activity level. Flexing restates the budget for actual output so you compare like with like. Otherwise a volume change would look like a cost problem.

What is the sales volume variance?

It shows the profit effect of selling more or fewer units than budgeted. Multiply the unit difference by the budgeted profit per unit, or contribution per unit under marginal costing.

Are favourable variances always good?

No. A favourable material cost variance could come from cheaper, lower-quality material that increases waste or hurts sales. Always look at the cause and at related variances.