Quick Answer
Variance analysis compares actual financial results against budget or forecast to identify and explain differences. It breaks variances into volume, price, mix, and timing components, helping finance teams understand why performance deviated from plan. Effective variance analysis goes beyond calculating the gap — it identifies root causes and recommends corrective actions.
Variance analysis is the backbone of financial control. It connects the budget (what you planned) to actuals (what happened), creating accountability and driving corrective action. Without it, budgets become shelf-ware rather than management tools.
Favourable vs unfavourable. A favourable variance means actual results are better than budget (higher revenue or lower costs). Unfavourable means worse than budget. Note that a favourable cost variance means spending less than planned, which could indicate underspending rather than efficiency.
Volume variance. The difference caused by selling more or fewer units than planned, holding price constant.
Price variance. The difference caused by achieving a higher or lower price than planned, holding volume constant.
Mix variance. The difference caused by selling a different product or customer mix than planned.
Timing variance. Revenue or costs that shifted between periods but will catch up over time — for example, a delayed contract signing.
1. Calculate the gap. For each P&L line, compute actual minus budget in both pounds and percentage terms. Flag anything above your materiality threshold (commonly 10% or £5,000-£10,000).
2. Decompose the variance. Break material variances into their components. If revenue is £100k below budget, is that because you sold fewer units, at a lower price, or a different mix?
3. Identify root causes. Talk to budget holders and operational teams. A variance is a symptom — the root cause might be a lost customer, a delayed hire, an unexpected price increase from a supplier, or a market shift.
4. Recommend actions. Variance analysis without action is just accounting. Recommend whether to adjust the forecast, change spending plans, or investigate further.
5. Update the forecast. Material variances should flow into your latest forecast so leadership has an accurate view of where the year will land.
FP&A tools like Grove FP automatically calculate variances when actuals are imported, highlight material deviations, and allow finance teams to add commentary directly against each line. This saves hours of manual spreadsheet work each month.
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FAQ
Materiality thresholds vary by company size. A common approach is to flag variances exceeding both 10% and £5,000-£10,000. Some companies use a sliding scale — tighter thresholds for controllable costs, looser for items with natural volatility like FX.
Monthly is standard practice. Perform variance analysis as part of your month-end close and management reporting cycle. Some fast-moving businesses also do weekly flash variance reviews on key revenue and cash metrics.
Variance analysis compares actuals against a plan (budget or forecast). Trend analysis compares actuals over time (month-on-month or year-on-year) to identify patterns. Both are valuable and complementary — use them together in your management reports.
Both. Budget variance shows performance against the original annual plan. Forecast variance shows performance against the latest expectations. Budget variance is useful for annual performance reviews; forecast variance is more actionable for in-year decision-making.
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