In Odoo 8.0, managing accounting in a multi-company setup requires each company to have its own Chart of Accounts, journals, and fiscal settings. You can enable multi-company mode under Settings → Users → Companies, then assign specific users to the companies they handle. Transactions, reports, and journals stay isolated unless you configure consolidated reporting.

At Ledger Labs, we recommend keeping inter-company transactions automated through proper journal mapping and consistent account structures—it helps maintain accuracy and saves time during reconciliation.