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Häufig gestellte Fragen

Which ERP is best suited for a company with 50 to 100 employees?
There is no one-size-fits-all recommendation, because industry, degree of internationalization and customization needs determine which solution fits. Common candidates in the upper mid-market are Microsoft Dynamics 365 Business Central, SAP Business One and the modular open-source system Odoo, which has established itself as a serious alternative in this size class. In highly regulated or manufacturing-oriented industries such as mechanical engineering, food or pharmaceuticals, specialized industry solutions are often a better choice than generic suites. Pay less attention to brand names and more to whether the system already covers the majority of your requirements in its standard version — a benchmark of 80 to 95 percent is frequently cited.
How much does an ERP for 50 to 100 employees cost over five years?
Realistically, total costs over five years range from a high six-figure to a seven-figure sum depending on module scope, customization depth and interface complexity; with around 80 users, licenses, implementation and internal effort combined often amount to between roughly 0.5 and 2 million euros. Pure license or subscription fees typically account for only about 20 to 35 percent of this, with the larger remainder going to implementation, customization, training and data migration. Cloud licenses in the mid-market typically cost around 50 to 150 euros per user per month, depending on edition and modules. Hidden costs from customizations and migration are regularly underestimated and can make up a substantial share of the total budget.
How long does an ERP implementation typically take in this size class?
From contract signing to go-live of the core functions, you should realistically plan for nine to 18 months; if you add the upstream selection phase of around three to six months, the overall project often stretches over more than a year. A pure cloud solution with a high standard fit can be implemented in around six to nine months if customization is consistently avoided, while replacing complex on-premise legacy systems can take 15 to 24 months. Sales promises of a go-live within three months are almost never realistic for a full ERP serving 50 to 100 users. Phasing the rollout into two or three waves usually reduces project risk significantly compared with a big-bang approach.
Do we need an external consultant for the ERP selection?
For a first ERP implementation in this size class, external selection support is almost always economically worthwhile, because in-house project experience and market overview are rarely available. An experienced consultant protects you from contract pitfalls, sharpens the requirements specification and usually improves your negotiating position. When choosing the implementation partner, focus more on industry-specific experience and reference customers of a similar size than on the lowest daily rate, as a higher daily rate often pays for itself through more efficient design work. A clean separation between selection consulting and the later implementation partner is important to avoid conflicts of interest.
Cloud or on-premise – which fits better for 50 to 100 employees?
For companies of this size, cloud is usually the more pragmatic route today, as cloud deployments now account for around 70 percent of all ERP installations and clearly predominate in new projects, which relieves the typically lean internal IT team of one to three people. The subscription model suits the cash-flow situation, updates and security patches are delivered by the vendor, and standardized APIs simplify connecting external systems. On-premise or private-cloud hosting remains attractive mainly for very deep customization, OT integration or strict data-residency requirements, in which case many mid-sized companies opt for hosted ERP with servers located in Germany. Hybrid models combine both worlds, for example cloud for finance and HR and on-premise for time-critical production areas.
Does an ERP for the mid-market have to support the e-invoicing mandate?
Yes — since January 1, 2025, all domestic companies in the B2B sector must be able to receive, process and archive structured e-invoices in an audit-proof manner, which is why a new ERP must cover this function. Transition periods apply to issuing: in 2025 and 2026, paper or other invoice formats may still be used, companies with prior-year revenue of up to 800,000 euros even have until the end of 2027, and from 2028 only structured e-invoices will generally be permitted in B2B. The relevant format is based on the European standard EN 16931, for example as XRechnung or ZUGFeRD. Also make sure that archiving complies with the GoBD principles and that at least the structured data record is retained in its original format.