If you are already doing your accounting with the software you are comfortable with, there is no need to duplicate the work.
While Xero and Quickbooks do not yet have a version that is compliant with Spanish GAAP, we can export your Xero or QB data to our Spanish software and transform it so that it is compliant with Spain's accounting regulations. We are a partner of Xero. If you would like to do your own accounting, we can help you get started with Xero.
If you have other software such as SAP or in-house software, let us take a look. If you are choosing between Xero and Quickbooks, we recommend Xero because as of 2018, Xero can link to some banks in Spain and Transferwise while Quickbooks cannot.
While changes to the Spain GAAP regulations were instituted recently to bring the system more into line with accounting systems in the other EU countries, each country in Europe still maintains their own accounting regulations. You may not perform accounting using UK or USA GAAP rules; accounting for your SL must conform to Spanish GAAP in order to file the corporate income tax and annual accounts.
Any business based in Spain must follow the Spanish rules for accounting. You are required to present various quarterly and annual tax forms. You must also present the annual accounts (libros y cuentas anuales) at the provincial mercantile registry within six months after the close of the year. These annual accounts are public information.
Can you do the accounting according to UK GAAP? While the accounting in Spain must be done according to Spanish GAAP (Plan General Contable), we can enter the accounting data you provide into both the Spanish software and UK software, such as Quickbooks, so that we can provide results that conform both to Spanish GAAP for reporting to the Spanish tax office, and to UK GAAP for other purposes, such as reporting to your English investor or to combine with the results of the English branch of the business.