What it means
A budget states what the organisation expected. Actual results state what happened.
The gap between them is information, and budget variance reporting is the process of extracting it. Every month, finance produces a statement comparing actual with budget for each line, highlights variances above a threshold, and asks the responsible manager to explain them and to say what they will do.
The first step in explanation is to decompose. A revenue variance of minus $100,000 might be 1,000 fewer units at the budgeted price, or the budgeted units at a price $10 lower, or some combination; the two have completely different causes and remedies.
Cost variances split the same way: a materials variance separates into a price variance (paid more or less per unit than budgeted) and a usage variance (used more or fewer units than budgeted for the output achieved). Labour splits into rate and efficiency.
Overheads split into spending and volume. The second step is to flex the budget.
If sales volume was 10% above budget, variable costs should be 10% above budget too, and reporting them as an adverse variance against the original budget is misleading. A flexed budget restates the cost lines at the actual activity level, so that the variance shows genuine over- or under-spending rather than the arithmetic consequence of selling more.
Volume variances are then reported separately, and usually belong to sales rather than to the cost centre. The third step is to classify.
Timing variances (an invoice budgeted in March arriving in April) reverse themselves and need no action. Permanent variances (a price increase from a supplier) affect the full-year forecast.
Controllable variances (overtime, discretionary spending) are the manager's responsibility; uncontrollable ones (exchange rates, a regulatory change) are not, though the response to them may be. One-off variances are separated from recurring ones.
The final step is action. A variance report that produces explanations but no decisions is a history lesson.
Good practice sets a threshold (say, variances over $10,000 or 5%), requires a written commentary and a proposed action for each, and tracks whether the action was taken and whether it worked. The cumulative year-to-date variance and its effect on the full-year forecast matter more than any single month.
Variances can also reveal problems with the budget rather than with performance. A line that is consistently adverse by the same amount every month was probably budgeted wrongly, and the honest response is to correct the forecast rather than to keep explaining it.
In practice
Real-world examples.
Example
A hotel reports a $40,000 adverse energy variance and finds that $25,000 is a tariff increase and $15,000 is a boiler fault.
Example
A software company's adverse salary variance of $60,000 is entirely a timing difference: three hires budgeted for January started in March, and the variance will reverse by year end.
Example
A retailer's favourable marketing variance turns out to be a campaign postponed to next quarter, not a saving.
Think of it
“Budget variance shows how actual results compare to your plan-did you hit your financial targets?
Formula
Calculation
Budget Variance = Actual minus Budget
Variance % = (Actual minus Budget) / Budget x 100%
Sales Price Variance = (Actual price minus Budget price) x Actual units
Sales Volume Variance = (Actual units minus Budget units) x Budget price
Material Price Variance = (Actual price minus Standard price) x Actual quantity
Material Usage Variance = (Actual quantity minus Standard quantity for actual output) x Standard price
Worked example. A bakery budgets for a month: 40,000 loaves at $3.50 = revenue $140,000; flour at 0.5 kg per loaf, 20,000 kg at $0.80 = $16,000; bakery labour 2,000 hours at $18 = $36,000. Actual: 44,000 loaves sold at $3.40 = $149,600; flour 23,100 kg at $0.85 = $19,635; labour 2,150 hours at $18.50 = $39,775.
Revenue variance = $149,600 minus $140,000 = $9,600 favourable, split:
- Price variance = ($3.40 minus $3.50) x 44,000 = minus $4,400 adverse
- Volume variance = (44,000 minus 40,000) x $3.50 = $14,000 favourable
Flour variance = $19,635 minus $16,000 = $3,635 adverse against the original budget, but the flexed budget for 44,000 loaves is 22,000 kg x $0.80 = $17,600, so:
- Price variance = ($0.85 minus $0.80) x 23,100 = $1,155 adverse
- Usage variance = (23,100 minus 22,000) x $0.80 = $880 adverse
- Volume effect (belongs to sales) = $17,600 minus $16,000 = $1,600
Labour variance = $39,775 minus $36,000 = $3,775 adverse; flexed budget = 2,200 hours x $18 = $39,600:
- Rate variance = ($18.50 minus $18) x 2,150 = $1,075 adverse
- Efficiency variance = (2,150 minus 2,200) x $18 = $900 favourable
- Volume effect = $3,600
Reading: the bakery sold 10% more loaves (good), partly by discounting (price down 3%, costing $4,400). Flour cost more per kilogram (supplier increase, uncontrollable, permanent: adjust the forecast) and 5% more flour was used than the standard allows (wastage: investigate). Labour was paid more per hour (overtime premium) but worked efficiently. Net effect on profit against budget: revenue up $9,600, costs up $7,410, profit up $2,190. The manager's actions: review the discount policy, investigate wastage, and reforecast flour at $0.85.Case study
Seen in the real world.
A logistics company produced a monthly variance report of forty pages that listed every line's variance and was read by nobody. The operations director described it as "a list of numbers that are different from other numbers". The finance director replaced it with a one-page report: the ten largest variances by value, each with a classification (timing, permanent, controllable, uncontrollable), a one-line explanation from the responsible manager, the action agreed, and the effect on the full-year forecast.
Variances under $15,000 were reported only in total. In the first month the report revealed that the adverse vehicle maintenance variance the company had been "explaining" for eight months as bad luck was a permanent step-up in costs after a change of fleet supplier, and that the favourable fuel variance everyone had been pleased about was entirely a fall in the fuel price that a customer surcharge clause would shortly pass back to customers.
The full-year forecast was cut by $400,000, which was unwelcome but true. Over the following year, actions tracked through the report reduced controllable adverse variances by two thirds, and the operations director became the report's strongest advocate, because it told him where to look.
Watch out
Common mistakes.
- Reporting cost variances against the original budget when volume has changed. Flex the budget first.
- Explaining variances without acting on them, or without updating the forecast for permanent ones.
- Treating all favourable variances as good. Underspending on maintenance, training or marketing is often a cost deferred, not saved.
Questions
People also ask.
What threshold should trigger investigation?
Commonly 5% to 10% of the line or a fixed money amount, set so that the report covers the variances that matter without drowning them.
Who is responsible for a variance?
The manager who controls the driver: sales for volume and price, purchasing for material price, production for usage and efficiency.
What if the budget was simply wrong?
Say so, correct the forecast, and record the lesson for the next budget cycle. Persistently explaining the same variance is a sign of a budgeting error, not a performance one.
From the founder's library
Take it further with the book.
Build your financial confidence beyond this definition. Shihan's full-length guide, Accounting Fundamentals, takes the same plain-English approach and turns it into a complete, practical playbook for non-finance managers, business owners and students - with chapter-end quiz answers and presentation slides included.
25% off with code MMHQ25, applied at checkout. Priced in USD - checkout may show the equivalent in your local currency.
View the book and save 25%