Fathom does not currently generate a cash flow forecast. This functionality is a feature that is currently in development and is scheduled to be released by the end of this year. It will be a three-way forecast covering the Profit & Loss statement, the Balance Sheet, and the Statement of Cash Flows.
Budgets and forecasts generated outside of Fathom can be imported, and are useful in Fathom for variance analysis and for setting KPI targets automatically.
In addition, you can generate full-year projections (ie. combining actuals and budgets to project full end of year results) in Fathom using budgets or a 12 month rolling average. You can import your budget from Xero, QuickBooks, MYOB or Excel.