Variances
Variances
This topic is assessed in IBDP Business Management at Higher Level (HL) only.
A budget acquires its full management value only when actual performance is compared against it. The difference between a budgeted figure and the actual figure for the same period is called a variance. Variance analysis is the process of identifying, calculating, and interpreting these differences — determining whether they are significant, what caused them, and what management response is required. It is one of the most widely used tools in management accounting because it converts the budget from a static planning document into a dynamic instrument for performance monitoring and control.
Favourable and adverse variances
Every variance is classified as either favourable or adverse depending on its effect on profit:
- A favourable variance (F) improves profit relative to budget. For revenue: actual revenue exceeds budgeted revenue. For costs: actual costs are lower than budgeted costs.
- An adverse variance (A) reduces profit relative to budget. For revenue: actual revenue falls below budgeted revenue. For costs: actual costs exceed budgeted costs.
The classification is always from the perspective of profit impact — not whether the number is higher or lower in absolute terms. A cost that is higher than budget is always adverse; a cost that is lower than budget is always favourable. A revenue figure higher than budget is always favourable; a revenue figure lower than budget is always adverse.
Variance formulas — not provided on the IB formula sheet; apply from understanding:
\[ \text{Revenue variance} = \text{Actual revenue} - \text{Budgeted revenue} \] \[ \text{Cost variance} = \text{Budgeted cost} - \text{Actual cost} \]For revenue, a positive result is favourable; negative is adverse. For costs, a positive result is favourable (actual cost lower than budget); negative is adverse (actual cost higher than budget). Both conventions produce a result where positive = favourable and negative = adverse — a consistent and useful rule.
Outlet 7's Q1 budget and actual results are shown below. Calculate all variances and classify each as favourable or adverse.
| Item | Budget (£) | Actual (£) | Variance (£) | F / A |
|---|---|---|---|---|
| Revenue | 119,280 | 112,560 | ||
| Ingredients and packaging | 45,440 | 43,920 | ||
| Staff wages | 27,680 | 29,150 | ||
| Rent and rates | 14,400 | 14,400 | ||
| Utilities | 4,930 | 5,280 | ||
| Head office overhead | 6,200 | 6,200 |
Revenue variance:
\[ £112{,}560 - £119{,}280 = -£6{,}720 \quad \textbf{Adverse} \]Ingredients and packaging variance:
\[ £45{,}440 - £43{,}920 = +£1{,}520 \quad \textbf{Favourable} \]Staff wages variance:
\[ £27{,}680 - £29{,}150 = -£1{,}470 \quad \textbf{Adverse} \]Rent and rates variance:
\[ £14{,}400 - £14{,}400 = £0 \quad \textbf{No variance} \]Utilities variance:
\[ £4{,}930 - £5{,}280 = -£350 \quad \textbf{Adverse} \]Head office overhead variance:
\[ £6{,}200 - £6{,}200 = £0 \quad \textbf{No variance} \]Net profit variance:
\[ \text{Budgeted profit} = £119{,}280 - £98{,}650 = £20{,}630 \] \[ \text{Actual profit} = £112{,}560 - (£43{,}920 + £29{,}150 + £14{,}400 + £5{,}280 + £6{,}200) = £112{,}560 - £98{,}950 = £13{,}610 \] \[ \text{Net profit variance} = £13{,}610 - £20{,}630 = -£7{,}020 \quad \textbf{Adverse} \]The overall profit variance of -£7,020 adverse is primarily driven by the revenue shortfall (-£6,720). An adverse revenue variance alongside a partly-offsetting favourable cost variance on ingredients (£1,520) suggests lower customer numbers than budgeted — fewer customers meant fewer ingredient costs (consistent with a variable cost), but wages did not fall proportionally (an adverse wages variance of £1,470 suggests the staffing level was maintained despite lower footfall).
Interpreting variances — causes and responses
Calculating variances is only the first step; the analytical value lies in understanding what caused them and what response is appropriate. Key questions for each significant variance include:
- Is the variance significant in size? Minor variances in volatile cost lines (energy, casual labour) may not warrant investigation; large variances in controllable costs should always be examined.
- Is the variance controllable? A rent increase imposed by a landlord is uncontrollable by the outlet manager; an overspend on casual staff is controllable. Investigation should focus on controllable variances.
- Is the variance a one-off or recurring? A one-off event (a broken refrigeration unit) may explain a single period's adverse utilities variance without indicating a systemic problem. A recurring adverse variance requires structural action.
- Is the variance linked to other variances? In the Outlet 7 example, the favourable ingredient variance and the adverse revenue variance are likely related — fewer customers produce fewer ingredient costs. Understanding the relationship between variances provides a more accurate diagnosis than examining each in isolation.
Key Takeaways
- A variance is the difference between a budgeted figure and the actual figure for the same period; favourable variances improve profit, adverse variances reduce it.
- Revenue variance = actual revenue minus budgeted revenue (positive = favourable). Cost variance = budgeted cost minus actual cost (positive = favourable).
- These formulas are not on the IB formula sheet — apply them from understanding and always classify the result as favourable or adverse.
- Interpreting variances requires understanding their cause: is the variance controllable, significant, recurring, and linked to other variances?
- Variances between cost lines are often interdependent — a revenue shortfall typically produces linked favourable variances in variable cost lines, which must be interpreted together rather than in isolation.