Implementing Odoo · ERP switch
Sage 100 Desktop has received no updates since 2025. DATEV Mittelstand Faktura ends as a standalone product on 31 December 2026. Dynamics NAV is being phased out version by version. Lexware is now only available as a subscription. If you switch now, you switch with a plan rather than out of necessity: master data, open items and stock come with you, the history stays readable in the archive, and your tax advisor keeps working with DATEV. At a fixed price, we check beforehand what will be migrated in your case and what the switch will cost.
Official Odoo Partner · fixed price upfront · your old system stays in operation until the cut-over date
Reasons to switch in 2026/2027
No marketing, just vendor information. If one of these affects your system, the question is no longer whether to switch, but when.
Sage 100 Desktop
The perpetual licence no longer receives upgrades or personalised support (“Extended Support”); no licence extensions since October 2023. Sage recommends moving to the Sage 100 Connected subscription model. Office Line: no updates since July 2022.
Source: Sage, Extended Support · Details: Connected or Odoo?
DATEV Mittelstand Faktura
DATEV is discontinuing Mittelstand Faktura (item no. 93600 and ITU version 93500) as of 31 Dec 2026; according to DATEV, the “Mittelstand Faktura mit Rechnungswesen” packages are not affected. The included contract for DATEV Unternehmen online also ends unless you actively have DATEV continue it. According to DATEV, the successor “Auftragswesen next” covers sales documents. Inventory, manufacturing, CRM and projects are not part of the described scope.
Source: DATEV, discontinuation · Details: Auftragswesen next or Odoo?
Microsoft Dynamics NAV
Extended support has ended for NAV 2015 (January 2025) and NAV 2016 (April 2026); NAV 2017 ends on 12 Jan 2027, NAV 2018 on 12 Jan 2028. After that, no security updates. Microsoft's answer is Business Central – in practice a new implementation.
Source: Microsoft Lifecycle
Lexware
Unlimited or 365 days; if the subscription expires, only read access to the data remains. Inventory management: 3 or 5 workstations included, more at extra cost. Price adjustment on 1 September 2026.
Source: shop.lexware.de · Details: stay or switch?
All systems
Receiving since 1 Jan 2025, sending from 2027 for companies with more than €800,000 in revenue, from 2028 for everyone. Old perpetual versions no longer get the formats; subscription versions sell them as an add-on package.
Sage 100 Connected, Lexware as a subscription and Business Central are workable routes. They cost more and more on an ongoing basis and don't solve the real problem: three systems, master data three times, Excel in between. Switching pays off if you also merge the isolated solutions when changing systems.
What changes with Odoo
Most businesses that come to us don't have one legacy system but a chain: accounting here, orders there, stock in Excel, customers in the email program. Odoo maps sales, purchasing, inventory, invoicing, CRM and projects in one database: one customer, one product, one truth. In Germany, accounting remains GoBD-compliant (SKR03/SKR04, locking, audit trail) and goes to your tax firm via DATEV export. Your tax advisor will mainly notice one thing about the switch: cleaner data.
Licence. Odoo Community is free, but without accounting reports and DATEV export. Current Enterprise prices per user are listed at odoo.com. Which edition you need, we tell you in the switch check. Usually the answer is Enterprise, because of DATEV.
GoBD. There is no official GoBD certificate for software. According to partner information, a software certification under IDW PS 880 exists for Odoo's standard scope; your bookkeeping only becomes GoBD-compliant through setup, operation and procedural documentation. Customisations are not covered by the certification. That's why we stay within the standard wherever possible and document the rest in your procedural documentation. More on GoBD and DATEV.
What gets migrated when you switch
Anyone who promises to migrate ten years of booking history 1:1 is selling you effort you will never use. The proven approach: set a cut-over date, migrate balances and open items, keep the old system read-only. This is also what Odoo recommends in its documentation on opening the accounting.
| Data | Migrated | Archive (read-only) | New in Odoo |
|---|---|---|---|
| Customers, suppliers, contacts | ✓ | – | – |
| Products, prices, bills of materials | ✓ | – | – |
| Stock levels at cut-over | ✓ | – | – |
| Chart of accounts, opening balances | ✓ | – | – |
| Open customer invoices and vendor bills | ✓ | – | – |
| Open quotations, sales orders, purchase orders | ✓ | – | – |
| Paid documents and entries from previous yearsretention obligation applies to the old system or archive | – | ✓ | – |
| Document images from previous years | – | ✓ | – |
| Custom reports, forms, special fields | – | – | ✓in the standard or with Studio |
| Workflows and approvals | – | – | ✓cleanly rebuilt, not copied 1:1 |
| Payroll | – | stays with the tax firm or payroll software | – |
Building up history in Odoo is possible if you need it, for example revenue per customer over the last three years as a report. That's a decision made in the check, not an automatism.
Start of a month or turn of the year. The old system remains leading until then.
Duplicates, inactive customers and products stay out.
Your team checks with real data, not demo data.
Balances, open items, stock. Old system switched to read-only.
First month-end closing, first DATEV export, first e-invoice – together.
The offer
The switch check is independent: if Sage 100 Connected or Lexware as a subscription is the better answer for you, the report says so. Whether a check is enough or a business analysis is needed, we clarify beforehand free of charge.
Step 1, free of charge
€0
30 minutes, via screen sharing
Which systems, how many users, what occasion, what date.
Step 2, fixed price
/ €1,190
net, fixed price, 8 hours, report within a week
We look at your old system and your exports. You receive in writing:
Multiple legacy systems, manufacturing, multiple companies
/ €2,390
net, fixed price, 16 hours
Same report, more depth: one matrix per legacy system, interfaces and manufacturing data included.
Small businesses, standard processes
Sales, purchasing, inventory and CRM in Odoo standard, your master data migrated, team trained. Fixed price €1,035. Open items and stock are added as a migration package billed by effort.
See Rocket StartManufacturing, multiple companies, interfaces
Processes recorded and mapped in Odoo, sample system with your data, effort estimate. Implementation billed by effort with a quote upfront.
See the business analysisAfter go-live
A fixed contact person, one hour of consulting per month included, support with updates. €195 per month, cancellable monthly.
Prices and packagesNot included in the check: the migration itself, interfaces to shops or point-of-sale systems, payroll, tax advice. Already on Odoo? Then the Odoo 20 Upgrade Check is the right starting point, not the switch check.
“We check beforehand what will be migrated in your case. And if the switch isn't worth it, the report says that too.”
Artem Petraschow · Founder of KAPEO Solutions · Odoo Functional certified, experience with Odoo 14 to 20
FAQ
For a business with sales, purchasing, inventory and accounting without special processes, we count the time from check to go-live in weeks, not months. The cut-over date decides: if you want to go live at the turn of the year, you should start the check in October. Manufacturing, multiple companies or interfaces extend this. By how much is stated in the report.
No. Entries and documents go from Odoo to the tax firm via DATEV export, just as they did from your old system. Before the first export, we agree with the tax firm which fields it needs.
They remain readable in the old system or in an archive. The retention obligation continues to apply. In Odoo you start with opening balances and open items. Historical reports can also be migrated on request.
Yes. Until the cut-over date, the old system remains leading; after that, it is set to read-only. There is no day without a system.
Yes, the most common one. Customers, products and stock come from your spreadsheets, the invoices from the program. The check is usually short here; Rocket Start is often enough afterwards.
Community is free and sufficient for sales, purchasing, inventory and CRM. As soon as accounting reports, DATEV export or document recognition are needed, Enterprise is the right choice. We clarify this in the check based on your processes, not on the price list.
Then the report says so, with reasons. You have invested €1,190 in a basis for a decision, not in a project. That happens, for example when a legacy system with a lot of special logic still has three years of support.
The first step
If you check in October, you can decide in November and start in January with clean balances. Tell us which system you use today. We get back to you within one working day for the free initial call. Or book a 30-minute call.
