What is cash forecast accuracy?

Cash forecast accuracy measures how closely actual cash flows match predicted amounts, typically calculated as the percentage variance between forecast and actual. For professional service firms, tracking forecast accuracy reveals whether cash projections can be relied upon for decision-making and identifies areas where forecasting methodology needs improvement.

Key characteristics

• Measures the variance between the forecast and the actual cash

• Expressed as a percentage or dollar variance

• Tracked over time to identify patterns

• Reveals the reliability of projections

• Identifies forecasting improvement areas

• Essential for confident cash management

Why it matters for professional service firms

Cash forecasts only provide value if reasonably accurate. A forecast consistently 30% off the actual is not useful for decision-making. Tracking accuracy reveals whether forecasts can be trusted and where methodology needs improvement. Professional service firms should measure forecast accuracy monthly and investigate significant variances to improve future predictions.

Real-world example

Rachel's firm created monthly cash forecasts but never measured accuracy. Analysis of past 6 months: average forecast error 18% (ranging from 8% to 32%). Variance analysis: collection timing was the largest error source (clients paid at different times than assumed), followed by expense timing (some invoices were paid earlier or later than planned). Improvements: collection forecast based on actual client payment patterns (not terms), expense forecast by specific payment date. Next 6 months: average error dropped to 7%. Forecasts became reliable enough for confident decision-making.