Licensed ERP almost always looks cheaper on the first page of the proposal. The comparison changes once you count the customisation, the integrations and the cost of changing how your business works to suit the product.
Every few months we are asked to price a custom system against a licensed product, and the conversation usually starts in the same place: the licence is a known number, and a custom build is not. That is a fair concern. It is also an incomplete comparison, because the licence is only one of four costs, and it is rarely the largest.
The four costs of a licensed ERP
The licence itself. Per user, per month, forever, and rising with headcount whether or not those users need the full product.
Implementation. Configuration, data migration and training, usually delivered by a partner at a day rate similar to a development team's.
Customisation. The modules, fields and workflows the product does not have. This is the number that moves, and it is the one that keeps moving after go-live.
Process change. The least visible cost: the work your team does differently, and often less efficiently, because the product requires it.
A custom build has three of those four. There is no licence, and there is no process-change cost, because the system is modelled on how you already work. What it has instead is a larger up-front development cost and an ongoing support arrangement.
Where the line falls
In our experience the crossover is driven less by company size than by how unusual the process is. A distributor with a conventional order-to-cash flow is well served by a licensed product. A company whose margin depends on a quoting model nobody else uses will spend more customising that product than building the part that matters.
How to compare honestly
Price both options over five years, not one. Include the licence uplift for the headcount you expect, the implementation partner's estimate, a realistic customisation budget, and the cost of the upgrade cycle. Then put the custom quotation next to it, with its support retainer included. The two numbers are often closer than expected, and the second one buys an asset you own.
Related service: Custom ERP development.
