Excel financial forecast
Build an Excel financial forecast without starting from scratch
Create a 12-month financial forecast driven by clear assumptions, then download it as an Excel file with formulas intact.
Opening the template uses no credits. Building from a prompt uses credits; the Free plan includes 25.
A forecast is only useful if you can change an assumption and see the effect. Hand-built forecasts often bury growth rates inside formulas. Tabstra keeps assumptions in their own cells and links every month to them.
What the spreadsheet looks like
| Row | A | B |
|---|---|---|
| 1 | Assumption | Value |
| 2 | Starting revenue | 50,000 |
| 3 | Monthly growth | 0.05 |
| 4 | ||
| 5 | Month | Revenue |
| 6 | Jan | =B2 |
| 7 | Feb | =B6*(1+$B$3) |
| 8 | Mar | =B7*(1+$B$3) |
| 9 | Apr | =B8*(1+$B$3) |
| 10 | May | =B9*(1+$B$3) |
| 11 | Jun | =B10*(1+$B$3) |
| 12 | Jul | =B11*(1+$B$3) |
| 13 | Aug | =B12*(1+$B$3) |
| 14 | Sep | =B13*(1+$B$3) |
| 15 | Oct | =B14*(1+$B$3) |
| 16 | Nov | =B15*(1+$B$3) |
| 17 | Dec | =B16*(1+$B$3) |
| 18 | Total | =SUM(B6:B17) |
This is the real first sheet of the Sales Forecast template. Every total is a formula.
Who it's for
- Founders preparing investor or bank conversations
- Finance leads who need a quick first draft
- Students learning forecasting in Excel
What you get
- An assumptions block at the top
- Months that compound from the previous month
- Locked references ($B$3) so formulas copy correctly
- An .xlsx file that opens in Excel
How it works
- 1
Set the drivers
Starting revenue and growth rate are the only inputs in the basic model.
- 2
Test scenarios
Change the growth cell and the whole year recalculates instantly.
- 3
Download to Excel
The downloaded file keeps formulas, so you can keep working in Excel.
Prompts to try
Tips from practice
- Forecast drivers (customers, price, churn) rather than a single revenue line when you can.
- Keep historical months separate from forecast months.
- Use absolute references for assumption cells so formulas copy safely.
Good to know: A forecast shows the consequences of your assumptions. It is not a prediction, and Tabstra doesn't import historical data automatically except from a CSV or Excel file on Pro and Team.
Formulas used here: Percentage change, NPV / IRR, EOMONTH