Rolling forecast = closed actual months + projection for the next N months (fixed horizon, usually 12 or 18)
A rolling forecast is a financial projection updated every month or quarter by replacing the closed period with actual data and adding a new period at the end, so it always covers the same horizon ahead.
How it is calculated
Rolling forecast = closed actual months + projection for the next N months. Each close shifts the window: the actual month goes in, a new month is added at the end. The most common horizon is 12 months; in investor-backed groups, 18.
Example with numbers
In January the forecast covers January to December: projected revenue 1,200,000. January closes at 95,000 actual versus 100,000 planned. In February the forecast covers February to next January, with January's actual fixed and the monthly run rate adjusted to 97,000: new 12-month total, 1,164,000.
How Fibady does it
Every month the consolidated actuals arrive from the ERP and replace the projection for the closed period; the rest of the forecast is kept by area and adjusted from Google Sheets through dynamic metrics. The result is compared with budget and with the previous forecast.