Moving to Plain from another system

Bring your contacts and balances across, run both systems side by side, then switch.

Updated 3 November 2026 · Plain 0.110.0

  1. Pick a start date. The first day of a VAT period or a month is easiest.
  2. Import contacts. In guided setup, under Bring your data, upload your customers and suppliers as a spreadsheet.
  3. Enter opening balances at the day before your start date: bank balances (see Add a bank account), what customers owe and what you owe.
  4. Set the books status. In Settings → Business & accounting, mark your books as running alongside your old system while you check. A banner reminds everyone which system is "live".
  5. Compare. Use the Cutover check report to compare Plain's figures with your old system month by month. See Cutover check.
  6. Switch. When the figures agree, select Switch Plain to live books.