ACCT2002 Chap.9 Overhead Cost Variances and Management Control
Overhead Cost Variances and Management Control
Overhead variance analysis extends the flexible-budget logic to variable and fixed indirect costs. Variable overhead can be analysed through spending and efficiency effects, often using the same allocation base that drives production activity. Fixed overhead requires a different insight: total budgeted fixed cost does not flex with actual output, while the amount allocated to production does.
The production-volume variance therefore reports the effect of denominator-level capacity utilisation under an absorption-costing system; it is not a spending variance and it is not the sales-volume variance. This chapter builds the four-variance view, reconciles every component and links the numbers to capacity, cost control, ABC and non-manufacturing settings.
What this chapter covers
- 01
Budgeted variable and fixed overhead rates
- 02
Variable-overhead spending variance
- 03
Variable-overhead efficiency variance
- 04
Fixed-overhead spending variance
- 05
Production-volume variance
- 06
The 4-variance analysis
- 07
Production-volume versus sales-volume variance
- 08
ABC and non-manufacturing applications
Four overhead variances from one production month
- 2Standard hours allowed are 6,000 × 1.5 = 9,000 hours. The fixed-overhead allocation rate is $72,000 ÷ 12,000 = $6 per hour.
- 3Variable spending variance is actual variable overhead − actual hours at the budgeted rate = $48,880 − 9,400 × $5 = $1,880 U.
- 2Variable efficiency variance is $5 × (9,400 − 9,000) = $2,000 U.
- 2Fixed spending variance is $74,100 − $72,000 = $2,100 U.
- 3Production-volume variance is budgeted fixed overhead − fixed overhead allocated = $72,000 − 9,000 × $6 = $18,000 U because output used less denominator capacity than planned.
Key terms
- Variable-overhead spending variance
- Actual variable overhead minus the flexible-budget amount for the actual quantity of the allocation base.
- Variable-overhead efficiency variance
- The overhead effect of actual allocation-base quantity differing from the standard quantity allowed.
- Fixed-overhead spending variance
- Actual fixed overhead minus budgeted fixed overhead.
- Production-volume variance
- Budgeted fixed overhead minus fixed overhead allocated to actual output using the budgeted rate.
- Denominator level
- The planned capacity quantity used to calculate the budgeted fixed-overhead rate.
- Four-variance analysis
- The combined presentation of variable spending, variable efficiency, fixed spending and production-volume variances.
- Capacity utilisation
- The extent to which available production or service capacity is used.
Overhead Cost Variances and Management Control FAQ
Why does fixed overhead have a volume variance if fixed cost does not change?
Because absorption costing allocates fixed overhead to output using a rate based on denominator capacity. Output below that denominator absorbs less than budgeted fixed cost.
Is the production-volume variance the same as the sales-volume variance?
No. Production volume concerns fixed manufacturing overhead allocated to units produced. Sales volume concerns the operating-income effect of units sold differing from the sales budget.
Can overhead variances be used outside manufacturing?
Yes. Service organisations can analyse support-resource spending and driver efficiency, provided the chosen cost relationship is meaningful.
How does ABC alter variance analysis?
Separate activity pools can have separate drivers and flexible budgets, making the source of overhead differences more visible than one broad base.
Exam move
Keep variable and fixed overhead in separate columns. For variable overhead, follow price-and-efficiency logic; for fixed overhead, separate spending from capacity allocation. Reconcile the four variances to actual overhead versus overhead allocated, and write the operational meaning beside each. Practise stating why production-volume and sales-volume variances answer different questions.
Re-derive every F or U label from operating-income impact rather than copying a neighbouring solution.
Working through Overhead Cost Variances and Management Control in ACCT2002? Sia is AskSia’s AI Accounting tutor — ask any ACCT2002 Overhead Cost Variances and Management Control question and get a clear, step-by-step explanation grounded in how ACCT2002 is taught and assessed. Read this chapter free, then take your hardest questions to Sia.
