July 16, 2026 · 8 min read
An ERP (Enterprise Resource Planning) is software that unifies a company's core processes on a single platform: accounting, inventory, sales, purchasing, production and HR. Instead of data scattered across spreadsheets and separate programs, everything lives in one central system where every department works on the same figures, updated in real time.
How an ERP works
An ERP is organized into modules, each dedicated to a business area, all connected to the same database. When you record a sale, the system automatically updates inventory, accounting and statistics. You don't re-enter the same data three times: you write it once and it travels where it's needed. Typical modules are:
- Accounting and invoicing: entries, invoices, due dates, financial statements.
- Inventory and logistics: stock levels, movements, goods in and out.
- Sales and CRM: customers, quotes, orders, history.
- Purchasing: suppliers, purchase orders, goods receipt.
- Production: bills of materials, work orders, progress tracking.
- Human resources: employee records, attendance, costs.
Why it pays off for an SME
The main benefit is a single source of truth: fewer errors, less manual work and instant visibility into margins and stock. An ERP reduces inventory errors, eliminates double data entry and lets you decide on real data, not estimates. To see if you're ready, read our guide ERP for SMEs: when you really need it.
Off-the-shelf or custom ERP?
Standard ERPs (like Odoo or SAP Business One) offer a lot out of the box but need tailoring; a custom ERP starts at €5,000 and models your processes exactly, without paying for modules you don't use. The choice depends on how unusual your workflows are. It's often worth integrating the ERP with your e-commerce and existing systems: let's talk and find the right solution together.
Frequently asked questions
What does ERP mean and what is it for?
ERP stands for Enterprise Resource Planning. It's software that integrates accounting, inventory, sales, purchasing and production on a single platform, so every department works on the same data updated in real time.
How much does an ERP system cost?
A custom ERP for an SME starts at €5,000. Standard solutions charge per-user fees, while a custom ERP has a higher upfront cost but no license fees and processes designed around yours.
What's the difference between an ERP and a management system?
A management system usually covers a single area (for example accounting or inventory). An ERP integrates several connected areas in the same system, avoiding duplicated and misaligned data.
Is my SME too small for an ERP?
No: there are ERPs sized for small businesses with 5-20 users. The sign you need one is when you manage too much data across separate spreadsheets and do a lot of repetitive manual work.