How much does an ERP system cost, and what drives the price?
What an ERP system really costs: the parts that make up the price, the hidden costs to watch for, and how to get a fixed-price quote after discovery that you can rely on.
The cost of an ERP system is not one number. It is the sum of several parts: licences or development, implementation, data migration, training, hosting and the changes you will need later. How big the total gets depends mostly on how many processes the system covers, how many people work in it, and how many other tools it has to talk to. In this article I walk through the factors that drive ERP pricing, where hidden costs tend to appear, and how to get a quote you know will not grow halfway through the project.
I'm Zoltán Keresztes. I have been building business software for more than 16 years, eight of them as a software architect. If you are still at the basics, start with our guide to what an ERP system is and the main types to choose from.
Why nobody gives you a price on the first call
Ask a few vendors and you will notice that most of them avoid naming a number in the first conversation. It is frustrating, but there is a good reason for it. A responsible quote requires knowing what will be built or rolled out, and a one-hour intro is not enough for that.
A blind estimate on the first call usually goes one of two ways:
- Too low: the vendor names a small number to win the work, and the extras arrive later.
- Too high: the vendor pads the number because they don't know what they are getting into, and passes that risk on to you.
Neither helps you. When you compare ERP quotes, the useful question is not who names the lowest figure first, but whose quote is backed by a real assessment.
What makes up the cost of an ERP system
It pays to break the total cost into parts, because a first quote often covers only one of them.
We start with a free initial consultation. Based on it, we design the system at a fixed price, step by step, so from the very beginning you see on a live prototype how it will work. After that, in a separate offer, we give a fixed price for development that covers everything we recorded during design.
1. Licences or development
With an off-the-shelf product this is the right to use it: a one-off licence or a monthly subscription, usually per user or per module. With a custom system it is the development work itself, priced by scope and complexity.
2. Configuration and customization
A packaged ERP rarely works straight out of the box. Product data, price lists, permissions and document templates need setting up, and often the workflows need adjusting too. If the way you work differs from what the package assumes, customization can become a large share of the total.
3. Data migration
Customers, products, stock levels and history have to be moved over from old spreadsheets, programs and paper. This line is routinely underestimated, because the data also needs cleaning first: duplicate customers, inconsistent product names, missing fields.
4. Integrations
Every external connection is its own piece of work: invoicing, accounting software, your bank, your webshop, couriers, barcode scanners. The more tools the system has to exchange data with, the more design and testing it takes.
5. Training
Your team has to learn the new system. On the vendor's side that is a training fee; on your side it is working time that goes into learning rather than day-to-day tasks.
6. Hosting and operations
The system has to run somewhere. With a subscription service this is part of the monthly fee. With a system you own, it means hosting or cloud fees, backups, updates and monitoring.
7. Maintenance and further development
Your business changes, regulations change, and the system has to keep up. There is no avoiding this; the real questions are what a change costs and who is allowed to make it.
What makes ERP more or less expensive
Looking at the parts above, the same few factors push almost all of them up or down.
How many processes the system covers
Connecting orders, stock and invoicing is a very different scale of work from a full system with production, purchasing, HR and management reporting. Most SMEs don't need everything in the first round. Start with the process that hurts most, and the first investment is smaller and the results come sooner.
How unusual your way of working is
If your processes look like those of most companies in your industry, an off-the-shelf system may work with light customization. If you have your own pricing logic or special production or scheduling rules, you need either expensive customization or custom development. We cover that decision separately in custom ERP vs off-the-shelf.
Users and permissions
With packaged systems, the number of users often multiplies the monthly fee directly. With a custom system, what matters more is how many different roles there are (warehouse staff, sales, management, outside partners) and how finely you need to control who can see and change what.
Number and quality of integrations
Connecting to a tool with a modern, well documented API is simpler than connecting to an old, closed system. So integration cost depends not just on how many there are, but on what you are connecting to.
Data volume and data quality
Moving a few hundred clean customer records is quick. Merging years of contradictory spreadsheets kept in several places is serious work.
Security and compliance
If the system has to be auditable, you need strict access control, logging and data protection rules. That matters in every industry, and especially in regulated ones such as pharmaceuticals or finance. We have built a strictly regulated, auditable internal document management system for a Hungarian pharmaceutical manufacturer, and we know this part cannot be bolted on later. It has to be designed in from the start.
Load and availability
A system used by ten people during office hours is different from one used by hundreds of staff or thousands of customers at once, around the clock. Designing for higher load takes more work and more robust operations.
Mobile and field use
If people need to record work in the field from a phone (technicians, drivers, warehouse staff), that requires a mobile interface or app, which is also part of the scope.
Off-the-shelf vs custom: how the costs compare
There is no universal answer to which one is cheaper, but there is a useful way to think about it: don't compare the first invoice, compare the total cost over a few years.
| Factor | Off-the-shelf subscription | Custom-built system |
|---|---|---|
| Upfront cost | Usually lower | Usually higher |
| Ongoing cost | Monthly fee, often per user | Hosting and maintenance |
| Customization | Limited, and often expensive | Built around your processes from the start |
| Who owns it | The vendor; you rent it | You do, including the source code |
| Switching vendors | Hard; data export can be an issue | Another developer can take it over |
Off-the-shelf is cheaper when your processes are standard, little customization is needed and the user count is modest. A custom system can work out better over time when the package would need heavy changes, when per-user fees would get high, or when the way you work is your competitive edge.
One important shift: custom development today can be more affordable than a few years ago. We work with AI-supported workflows. AI tools take over the routine parts such as boilerplate code, test scaffolding and documentation, while a human always makes the decisions about architecture, business logic and data security. Based on industry experience, a small or medium internal system used to need a development team of typically 3-4 people, and comprehensive automated testing, which keeps the system stable and easy to extend for years, pushed that cost even higher. Today, with the right methods, every project is led end to end by one lead developer, supported by a complete AI team, for a fraction of the traditional cost, including a large suite of automated tests. Since developer time is most of the cost, that shows up in the price. We can give you the exact scope and price after the one-hour call and the discovery phase.
The most common hidden costs
These are the items most often left out of a first quote that cause surprises later:
- Hourly change requests. If the quote covers only the basics, every new need becomes a separate invoice.
- Growing user fees. As the company grows, so does the monthly bill.
- Data cleaning. If it is not in the quote, someone on your side has to do it.
- Integrations. Often listed as "we'll sort that out later", then they turn into a project of their own.
- Fixing bugs after launch. If testing was cut short, bugs show up in production in front of your customers, and fixing them always costs more than doing it right the first time.
- Lock-in. If you don't own the source code, the vendor alone decides what future changes cost.
How to get a price that doesn't grow mid-project
The best protection against hidden costs is a quote that rests on a thorough assessment and is fixed. This is how we work:
- Free initial consultation. A free, one-hour online conversation in English. We talk through what you need and whether we are a good fit at all.
- Fixed-price system design with a live prototype. For a small to medium project this typically takes 1 to 4 weeks. At the end you get a realistic, fully clickable prototype of the planned system that you can show to anyone in your company. We set the assessment fee after the intro call, based on the scale of the project.
- Separate fixed-price development offer. In writing, item by item, based on the approved prototype. No open-ended invoice. If something new comes up during the project, we flag it up front and only proceed with your approval.
If we continue into the full build, we credit the assessment fee against the project price, so it is not money lost. And because there is no production code at this stage, anything can still be changed freely. See what you get at the end of the assessment.
Questions to ask every vendor
Whoever you ask for a quote, these questions make the prices comparable:
- Fixed price or hourly? If hourly, what is the cap?
- Are data migration, integrations and training included?
- What does a later change cost, and who can make it?
- What is the monthly running cost, and what does it include?
- Who owns the source code and the data? Can I take them with me if I switch vendors?
- Can I see the system before I pay for all of it?
We turn these points into a fuller checklist in our article on how to choose an ERP system.