Budget vs. forecast
A budget is the target management adopted. A forecast is what you now expect to happen. Here is why you need both and how to keep them separate.
Budgets and forecasts both describe the future in numbers, so they are easy to confuse. Many small businesses keep a single spreadsheet that starts the year as a budget and gradually turns into a forecast as people overwrite cells. By midyear, nobody can say what the original target was or why results differ from it.
The two documents answer different questions. Keeping them separate is what makes performance reviews meaningful and planning decisions traceable.
Budget
The budget is the plan management or a board formally adopts, usually before the year starts. It sets targets for revenue, costs, staffing, and sometimes cash. Once adopted, it stays fixed as the benchmark. Formal revisions are possible, but they are recorded as new versions with a reason.
Forecast
The forecast is management's current best estimate of what will happen, based on actual results so far and the latest assumptions. It changes as evidence changes. A rolling forecast keeps a constant horizon, such as the next twelve months, by adding a period each time one closes.
Side by side
| Factor | Budget | Forecast |
|---|---|---|
| Question it answers | What did we commit to? | Where do we now expect to land? |
| When it is set | Once a year, before the period | Updated monthly or quarterly |
| How it changes | Only through a formal, recorded revision | Freely, as evidence and assumptions change |
| Used for | Performance evaluation, targets, incentives | Decisions about hiring, spending, cash, and financing |
| Variance meaning | How far results departed from the plan | How expectations have shifted since the last forecast |
| Typical horizon | The fiscal year | A rolling 12 months or more, or the rest of the year |
Choose budget when
- You need a fixed target to evaluate performance against.
- A board, lender, or owner must approve the plan.
- Incentives or departmental spending limits depend on it.
Choose forecast when
- You need to decide whether you can afford a hire or purchase now.
- Conditions have changed materially since the budget was set.
- You need to plan cash and financing for the months ahead.
The bottom line
You need both, and they must stay separate. Adopt a budget and leave it alone as your benchmark. Maintain a forecast that moves with reality. Then compare actuals against both, so you can see how far you are from the plan and how your expectations have shifted. PursuitBid is built around exactly this separation.
Still deciding?
Bring the decision to a short call. We will tell you which option we would choose in your position, and why.