Work out budget alert threshold instantly with clear inputs, formula shown and shareable results.
A percentage-of-budget alert fires too late, because by the time 80 percent is spent the month may be nearly over anyway. Forecast-based alerting projects the current burn rate to month end and fires as soon as the trajectory exceeds budget, which on day twelve gives more than two weeks to react rather than two days.
Budget projection
burn rate = spend to date / day of month; projected = burn rate x 30.44; variance = projected - budget
Because it gives lead time. Crossing 80 percent on day 27 is normal; crossing it on day 12 is an emergency, and only a forecast distinguishes them.
Compare the burn rate against previous months' rates at the same day. A step change in daily rate points at a specific event rather than organic growth.