Can I change the start date for a company?
For companies on a Portfolio plan...
Fathom, by default, will always import up to 36 months of historic data starting from the most recently completed calendar month, and this cannot be amended.
For companies on a Fathom Pro plan...
The initial company start date is imported into Fathom as an anchor point for all subsequent data.
You can change the company start date to include prior periods if the company is sourced from:
- QuickBooks Online 
- Sage Business Cloud 
- Xero 
You cannot change the company start date to earlier, without deleting and reimporting it, if the company is sourced from:
- MYOB 
- QuickBooks Desktop 
- Excel 
For all Fathom Pro companies, the start date can be changed to later by removing prior periods.
❗ Notice: If the company is sourced from MYOB, QuickBooks Desktop, Sage 50, or Excel and the company start date is changed to a later period, it cannot then be changed to the previous, earlier start date.
How to change a company's start date
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Xero, QuickBooks Online & Sage Business Cloud
To change to an earlier start date for companies sourced from Xero, QuickBooks Online, or Sage Business Cloud:
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MYOB, QuickBooks Desktop, Sage 50, and Excel
If you have a Fathom Pro company sourced from MYOB, QuickBooks Desktop, Sage 50, or Excel, to change the start date to earlier you must delete and re-import the company.
To make the transition as seamless as possible and retain many of the company’s Settings (KPIs, non-financial data, targets, custom templates, etc.) and reports, take the following steps:
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