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Checklist: what you need to migrate your accounting to Odoo

The key steps to prepare your data, avoid errors, and make a safe transition to Odoo
April 1, 2026 by
Checklist: what you need to migrate your accounting to Odoo
Albert Cabedo

Before you start: prepare your migration to Odoo well

Migrating accounting to Odoo is an important step for any company that wants to improve financial control, automate processes, and work more collaboratively with their advisory. However, for the migration to be successful, it is essential to prepare the information well before starting. This checklist includes the key aspects to review to avoid errors and surprises during the change.

Before getting into technical data, the first thing is to define when you will start working in Odoo. Choosing the starting point correctly will facilitate accounting and tax control and avoid duplications.

Define the moment of migration

Not all companies migrate at the same time. The important thing is to choose a clear date that is consistent with the accounting situation.

  • Start of the fiscal year
  • Start of the quarter
  • Start of the month after an accounting close

The more organized the previous period is, the easier the transition will be.


Review and adapt the accounting plan

Odoo includes the Spanish General Accounting Plan, but it does not always fit the details of each activity. Before migrating, it is advisable to review that the accounts truly reflect how the company operates and that generic accounts are not used for everything.

It is a good time to:

  • correctly separate purchases and services,
  • review accounts of regular expenses,
  • and adapt subaccounts if the company needs it.

Video on How to Update OCA Taxes

Review and adapt the accounting plan

Odoo includes the Spanish General Accounting Plan, but it does not always fit the details of each activity. Before migrating, it is advisable to review that the accounts truly reflect how the company operates and that generic accounts are not used for everything.

It is a good time to:

  • correctly separate purchases and services,
  • review accounts of regular expenses,
  • and adapt subaccounts if the company needs it.


Prepare the initial balances

One of the most delicate points of any accounting migration is loading the initial balances. These balances will allow the accounting to continue correctly from the start date in Odoo.

The following should be clear, at least:

  • outstanding customers and suppliers,
  • banks and cash,
  • input and output VAT,
  • loans or other debts.

Review customers and suppliers

Before importing data, it is highly recommended to review the records of customers and suppliers. An incorrect NIF or a poorly configured country can cause problems with VAT and tax models.

It is advisable to check that:

  • there are no duplicates,
  • the tax data is correct,
  • the country is well defined,
  • and the associated accounting accounts are appropriate.

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Correctly configure the taxes

The correct configuration of VAT is key from day one. Odoo allows for much of this process to be automated, but only if the taxes are well defined from the start.

It is important to be clear about:

  • national VAT,
  • intra-community VAT with reverse charge,
  • exempt or non-subject operations,
  • and imports if they exist.

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Define how payments will be managed

Before starting to account, it is advisable to decide how payments will be recorded in Odoo. This will facilitate bank reconciliation and avoid discrepancies.

Some points to define are:

  • use of bank, cash, and card,
  • necessary accounting journals,
  • usual method of collection and payment.



Review pending invoices

Before migration, it is important to identify if there are any pending invoices for collection or payment. These invoices must be transferred correctly to maintain control of balances and due dates in Odoo.

It is also advisable to check if there are:

  • corrective invoices,
  • credits,
  • or documents pending regularization.


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Coordinate the migration with the advisory

If the company works with an external advisory, the migration must be done in a coordinated manner. Defining who enters the data, who reviews the accounting, and who submits the taxes will avoid confusion from the very beginning.

Odoo greatly facilitates this collaboration, but it is important to establish clear criteria from the beginning.

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Test before working in real.

Before starting to use Odoo definitively, it is advisable to run tests. Creating sample invoices, reviewing VAT, checking balances and ledgers helps to detect errors in time and gain confidence in the system.

Conclusion

Migrating accounting to Odoo is not just a tool change, but an opportunity to streamline processes and improve financial control. With good preparation and by following this checklist, the transition can be made safely and smoothly, taking advantage of all the benefits that Odoo offers from day one.


See Blog: Accounting migration service to Odoo in Spain


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