When to reforecast a business budget: triggers that change a decision

The budget records the plan management approved. A forecast records the current expectation. Retain both so the company can assess performance and decide what to do now.

Updating the forecast should not erase the original commitments or assumptions. Name versions and periods clearly, with a record of significant changes.

Examples include a major customer change, delayed launch, hiring shift, supplier increase, inventory delay, financing event, or a recurring collection miss. Focus on changes that affect cash, capacity, margin, or an important target.

A small expense variance may need explanation without requiring a full model rebuild. Materiality should relate to the decisions management uses the forecast to make.

Change the relevant customer, unit, rate, hiring date, payment schedule, or other assumption. Explain the source of the change and who confirmed it.

For illustration, delaying a hire by three months changes payroll timing; reducing the year's payroll total manually does not explain which months or role were affected. Driver-level revisions make the next review easier.

If revenue changes, review delivery costs, support capacity, receivables, taxes where relevant, and cash timing. If inventory arrivals slip, review both sales and payment commitments.

Keep uncertain events in scenarios or clearly labeled assumptions. A possible financing round should not silently become committed cash because the forecast needs it to balance.

Show the difference from the prior forecast and approved budget, including the cause and cash effect. Record the decision, owner, and date for reviewing the result.

Compare future actuals with the forecast version used for the decision. A useful reforecast updates management's expectations while preserving the history needed to judge whether the response worked.

Record whether the change affects an approved commitment or only an unapproved option. A forecast can show both, but management needs that distinction when deciding what spending can still be changed without breaking an existing agreement.