[aaronax]

I see. I split my monthly cell phone bill among 8 family members. This is a manual process, but not too bad since I do it on average twice a year (faster to sign in and download 6 PDFs once than to sign in 6 times to download 1 PDF each time, etc.). So a few minutes to download 6 statement PDFs, 10 minutes to key numbers from those PDFs into my spreadsheet, and then 15 minutes to go through and manually split the transactions based on totals from the spreadsheet.

I'm pretty sure I could write a custom importer for Beancount but the breakeven point on time would be years.

I think modifying the CSV importer for Beancount to split certain transactions to certain percentages would be fairly easy--switching to Beancount itself (or other Plain Text Accounting software) would of course be monumental. But it is the ultimate in flexibility.