The Hidden Costs of Free ERP Software

We like open-source ERP. We implement it most weeks. But we also spend a fair amount of time helping businesses that picked "free" and then got surprised. So here's the budget conversation we'd have with you before you start.

1. Hosting is cheap. Running it well isn't.

A small virtual server can run Odoo Community or ERPNext for a modest monthly fee. That's the easy part. The work is in everything around it:

• Daily database and file backups, stored somewhere other than the same server
• Testing that a restore actually works (most people skip this until they need it)
• Security patches for the operating system and database
• SSL certificates, a reverse proxy and sensible firewall rules
• Monitoring, so you find out about a full disk before your users do

If nobody in-house owns this, pay for managed hosting. It costs more per month and much less per incident.

2. Setup takes longer than the install

Installing takes an hour. Setting the system up for your business is a different job:

• Chart of accounts and tax rules for your country
• Warehouses, locations and routes
• Product categories, units of measure, costing methods
• Price lists, payment terms, user roles and approvals
• Document templates for quotes, invoices and delivery notes

For a simple distributor, that's a few weeks of effort. For a manufacturer with multiple warehouses, it's more. The software being free doesn't shrink this work.

3. Feature gaps get filled one way or another

Every free edition is missing something. With Odoo Community, the gaps most people hit are:

• Full accounting reports and bank reconciliation features that sit in Enterprise
• The barcode scanning app for the warehouse
• Studio, for no-code changes
• The official mobile apps and Odoo's upgrade service

You can fill these with community modules (the Odoo Community Association publishes a lot of good ones), paid third-party apps, or your own development. Each option has a cost, either upfront or in maintenance. Our Odoo Community vs Enterprise post lists the gaps in more detail.

4. Upgrades are on you

Odoo releases a major version every year. ERPNext releases roughly as often. On a paid edition, the vendor or partner usually handles the database migration. On a Community install, you or your partner do it, often with tools like OpenUpgrade.

Each custom or third-party module also needs to be ported to the new version. If you've installed thirty modules from five different authors, some of them won't be ported on time, and a few never will.

This is the cost most people underestimate. A rough rule: plan an upgrade every one to two years, and keep a list of every module you've installed and why.

5. Support has to come from somewhere

When an invoice won't post on the last day of the month, who do you call? Options:

• Community forums: free, slow and uncertain
• An in-house person: good if you have one, a single point of failure if you only have one
• A support contract with a partner: predictable cost, agreed response times

A simple five-year model

When we help clients compare, we put both options in a table like this and fill in real numbers:

Sometimes free wins clearly. Sometimes the paid edition is cheaper once you count the gaps. Usually it's close, and the decision comes down to how much control you want.

The short version

Free ERP is a real option and often a good one. Just budget for the parts that aren't free. If you'd like help building that five-year comparison for your own business, an ERP consultation is a good place to start. For background, see free ERP software: what's actually free.