A sales forecast is an estimate of how much revenue you’re likely to close in a specific time period (week, month, quarter, or year). It answers two key questions:

• How much revenue is in the pipeline?
• How dependable is that revenue? (probability, timing, and risk)

A strong forecast doesn’t just total pipeline value. It also considers factors like deal stage, historical conversion rates, sales cycle length, rep performance, and customer buying patterns - so leaders can predict revenue with confidence.

The company plans the business around the forecast. When the forecast is wrong, teams pay for it.

• If the forecast is too high: the business may over-hire, over-spend, or commit to plans that revenue can’t support. When sales don’t come in, the company ends up in a last-minute firefight - cutting costs, freezing hiring, or changing priorities quickly.
• If the forecast is too low: the company may under-invest, miss growth opportunities, and scramble later to ramp resources too late.
  

When forecasting is consistently off - high or low - time and resources get wasted, leaders lose confidence in the pipeline, and teams spend more time reacting than executing