The export your tax advisor imports without calling you back.
Colly.io issues e-invoices, archives every document to GoBD standards and exports DATEV-ready journal entries – so the books are never the thing holding you up.
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What flows into your books
Archiving to GoBD standards
Invoices, delivery notes and accounting documents are archived in full and cannot be altered afterwards – the way the tax office expects it.
E-invoices
Your invoices are a PDF and a machine-readable record at the same time. The recipient can post them automatically instead of retyping them. Format: ZUGFeRD.
DATEV export
CSV files with journal entries, accounts and tax keys, ready to import into DATEV Unternehmen Online.
Documents stay as issued
Once a document is issued it can no longer be edited. In a tax audit, that is the difference between evidence and a discussion.
From document to DATEV export
Configure document types
Set up invoice templates, chart of accounts and tax keys once.
Create documents automatically
Invoices and delivery notes are automatically generated and archived on status updates.
Start DATEV export
Select desired period and download DATEV export with one click. Ready for the tax advisor.
100 %
GoBD-compliant archiving
E-Rechnung
Included in every plan
DATEV
Export in one click
Frequently asked questions
Is the archiving GoBD-compliant?
Yes. Every tax-relevant document is archived with a timestamp and a user reference and cannot be changed afterwards. That covers the GoBD requirements, the German principles for proper bookkeeping and archiving.
How does the DATEV export work?
In the accounting section you can select a period and export a DATEV-compliant CSV file. This contains journal entries, account numbers and tax keys and can be imported directly into DATEV Unternehmen Online.
Do I have to be able to issue e-invoices?
Every German company has had to be able to receive them in domestic B2B since 1 January 2025. Issuing them becomes mandatory on 1 January 2027 for companies with more than €800,000 in prior-year revenue, and on 1 January 2028 for everyone else. Colly.io issues e-invoices today – there is nothing for you to switch over on those dates.
More questions? See all FAQs →
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