Migrating from Sage to Odoo without stopping the business
Replace Sage with Odoo in one go, or run both side by side during the transition? Method, data to migrate and pitfalls to avoid, from a team that knows both systems.
Sage is one of the most widespread business software packages in Tunisia and French-speaking Africa, especially for accounting and payroll. Yet many companies are considering a move to Odoo to finally connect sales, inventory, point of sale and accounting. The fear is always the same: stopping operations, losing data or disrupting the books in the middle of a financial year.
We have worked on both sides: extractions and reporting on Sage for distributors, and Odoo roll-outs. Here is the method we use.
First question: do you need to replace everything?
Not necessarily. There are three possible scenarios:
- Full replacement: Odoo takes over sales and purchasing, inventory and accounting. This is the most consistent option in the long run.
- Coexistence: Odoo handles sales, purchasing and inventory; accounting stays on Sage for a while, fed by regular exports.
- Interfacing: Sage stays in place, and we extract its data for a specific purpose (reporting, dashboards, submissions to a supplier).
The right choice depends on your accounting calendar, payroll, and how ready your teams are.
Choosing the right cut-over date
For accounting, the ideal date is the start of a financial year, or failing that the start of a month after a clean close. For sales and inventory, the cut-over can happen at any time, provided you have a reliable stock count on the day.
What data to migrate
- Master data: products, customers, suppliers, accounts, taxes. This is the core of the work, and an opportunity to remove duplicates.
- Opening balances: trial balance, open customer and supplier items (unpaid invoices), valued inventory.
- History: useful for statistics, but rarely essential in full detail. A summarised history is often enough.
Our rule: we only migrate what will be used. Bringing over ten years of transactions “just in case” slows the project down and bloats the database.
The method, step by step
- Audit of the Sage data: volumes, quality, configuration specifics.
- Dry-run migration into a test Odoo, with checks on balances and stock.
- User training on their own data.
- Cut-over over a weekend: entries frozen, final migration, checks.
- Support during the first weeks, with the old database kept available for read-only access.
Classic pitfalls
- Different charts of accounts: the account mapping must be approved by the accountant before migration.
- Duplicate or poorly coded products: clean them up before, not after.
- Forgotten open items: cheques and bills of exchange in the portfolio, unallocated credit notes.
- Payroll: check early how it will be handled after the cut-over.
In short
A successful Sage-to-Odoo migration is prepared like a closing: with figures checked before and after. And if the time has not come to replace everything, interfacing Sage first is often an excellent first step.