What is expense variance?

Expense variance measures the difference between actual expenses and budgeted amounts, expressed in dollars and as a percentage, with analysis identifying the causes of the variation. For professional service firms, expense variance analysis reveals whether spending is controlled, where overages occur, and whether budget assumptions were realistic. Regular variance analysis enables timely corrective action and improved future budgeting.

Key characteristics

• Measures the difference between actual and budgeted expenses

• Expressed in dollars and percentage terms

• Should identify causes of significant variances

• Favorable variance means spending below the budget

• Unfavorable variance means spending above the budget

• Reviewed monthly for timely intervention

Why it matters for professional service firms

Expense variance analysis transforms the budget from a planning exercise to a management tool. Knowing you are $15K over budget matters less than knowing why: was it a one-time event, a timing difference, or an ongoing problem requiring action? Professional service firms should review monthly expense variances, require explanations for significant items, and take action when variances indicate problems. Regular analysis also improves budgeting: consistent variances in certain categories suggest budget assumptions need revision.

Real-world example

Rachel's firm reviewed the budget versus actuals quarterly, but without variance analysis. Expense variance implementation: monthly comparison with variance calculation, explanation required for items over 10% or $2K variance. First quarter analysis revealed: technology favorable $8K (delayed software purchase, timing not savings), marketing unfavorable $12K (unbudgeted initiative approved mid-quarter), travel unfavorable $6K (more client sites than expected, may recur). Actions: recognized technology variance would be reversed; marketing overage accepted but tracked against initiative ROI, and travel budget increased for the remainder of the year. Monthly analysis caught issues early and informed future planning.