Variance analysis connects a financial movement with its operational explanation. The calculation is only the start. An expense below budget may reflect a sustainable saving, a vacant role, a delayed invoice or work that has not happened yet.
Choose a sign convention
For revenue, actual minus budget is a useful signed movement. For cost, the same arithmetic produces a positive number when spending rises, which may be unfavorable. State whether your report uses signed financial movements or favorable/unfavorable labels. Do not silently change conventions between rows.
A two-product revenue bridge
Fictional Cedar Components budgeted 800 Standard units at $40 and 200 Premium units at $80. Actual sales were 600 Standard at $42 and 400 Premium at $78.
| Product | Budget revenue | Actual revenue |
|---|---|---|
| Standard | $32,000 | $25,200 |
| Premium | $16,000 | $31,200 |
| Total | $48,000 | $56,400 |
Revenue rose $8,400 with total units unchanged at 1,000. The shift from Standard to Premium contributes $8,000 at budget prices. Price changes on actual quantities contribute $1,200 for Standard and negative $800 for Premium, a net $400. The total bridge is $8,000 plus $400.
Calling the entire increase a pricing improvement would misstate the result. Most of the movement comes from mix. To understand profit, repeat the analysis using product contribution and include fixed-cost changes.
Distinguish timing from a run-rate change
A project invoice that moves from March to April can create a monthly variance without changing the annual total. A permanent price reduction changes future economics. Ask which movement reverses, when it reverses and what evidence supports that expectation.
Avoid adding a separate mix effect to a product-level quantity effect without checking the definitions. Those may be two decompositions of the same movement. Always reconcile the bridge to the reported total.
Turn the bridge into an action
Write one sentence for each material driver: what changed, why you believe it changed, whether it persists and who can influence it. If the cause is unknown, identify the data cut needed to resolve it. “Unfavorable due to higher costs” merely repeats the number.
Practice the broader FP&A case study, then use the workbook sample for a complete profit bridge and exercise answer. AFP's FPAC skills specification includes variance and price/volume/mix analysis; this page is independent interview preparation, not an endorsed certification resource.