Variance analysis is the comparison of actual financial results against budget, forecast, or prior periods, explaining the differences and identifying what drove them so management can respond rather than just observe.
A variance report that lists differences without explaining them is not analysis. It is arithmetic. The value of variance analysis is in the interpretation: revenue was $80,000 below budget because one project delayed its start by three weeks, not because the business lost competitive position. Overhead was $15,000 above budget because an equipment repair was unplanned, not because the cost structure has changed permanently. Those distinctions matter for whether the variance requires a response and what that response should be.
Variance analysis is not limited to budget comparisons. Comparing current performance to the same period in the prior year, or to the previous month or quarter, reveals trends that a budget alone cannot. A business may be on budget but still declining year over year, or above last year but missing plan. Each comparison answers a different question, and using all three provides a more complete view of performance.
Variance analysis is also a forecasting discipline. Understanding why actual results differed from plan improves the quality of future forecasts by surfacing the assumptions that were wrong and the patterns that were not anticipated. A business that analyses variances rigorously builds better forecasts over time and is less likely to be surprised by the same issue twice.
See also: Budgeting and Forecasting · Management Accounts · Sensitivity AnalysisVariance analysis that explains the why, not just the what, is where financial reporting becomes genuinely useful. See how Wefinx approaches Virtual CFO services.