Skip to main content
Bonsai Software
All field notes
Our approach3 August 20266 min read

Building a custom TMS: what you need to know

Having a custom TMS built is the right choice when your operation is too specific for an off-the-shelf package and you want full control over your own data. But it is not a decision you make lightly. Custom software demands more from your organisation than a packaged solution, and not every company is ready for it. Here is what you need to know before you start.

By Yeslin Beljaars

Building a custom TMS: what you need to know

Photo: Vagaro on Unsplash

Why do transport companies choose a custom TMS?

Standard TMS packages cover the basics: scheduling trips, tracking statuses, connecting invoices. For many companies that is sufficient. But as soon as your operation deviates from the average, you start hitting the limits. Think of combined transport modes, specific customer agreements on tariff structures, or customs and COA document flows that every package handles differently. You end up adapting your own process to the system rather than the other way around. And that quietly costs more than you expect: extra manual steps, Excel workarounds, frustration among planners. A TMS that genuinely fits the way you work eliminates that friction structurally.

What does a custom-built TMS concretely solve?

The biggest advantage is not a single feature but the accumulation of small frictions that disappear. Order entry that currently requires manual retyping from emails or PDFs can be read in automatically. Tariff calculations that currently live in a separate spreadsheet move into the system itself. Customer portals, subcontractor integrations, trip planning with specific constraints: all of it can be built exactly the way you need it. You can also embed AI from the inside out rather than as a loose plugin. Think of automatically suggesting the most cost-effective route based on your own historical data, or recognising deviations in loading times. That kind of intelligence only works well when it sits at the core of the system, not as a layer wrapped around it.

Where do companies get stuck with a custom TMS?

Most problems arise not during the build but during preparation. Companies underestimate how much implicit knowledge exists in their operation that has never been written down. Planners know how to organise a trip, but they have never formulated it as a rule. Surfacing that knowledge takes time, and if you skip it, you build a system that is technically correct but not actually used in practice. A second pitfall is ownership. Who will decide on changes later? Who manages the integrations? If those roles are not defined before the build starts, the system quickly becomes outdated after go-live. Finally: custom software costs more upfront than a SaaS licence. The payback period is real, but it requires patience and a clear picture of what the current situation is actually costing you.

When is a custom TMS the wrong choice?

If your operation is largely standard, there is no need to reinvent the wheel. A mid-sized transport company running straightforward domestic road freight will get more value from a well-configured standard package than from custom software. The same applies if your organisation is still heavily in flux: you would be building a system on top of a process that will look different tomorrow. Custom software requires stability in the operation and commitment from management. If either is missing, an AI Workers approach is often smarter: you automate the pain points on top of your existing system without replacing the entire foundation.

What does a responsible build process look like?

Start with an honest picture of what the current situation costs. Not just the licence fees for your existing package, but the hours planners spend on manual work, the errors that occur, and the customer complaints caused by slow status updates. That is your business case. From there, work in milestones with go/no-go decision points so you are not locked into a project heading in the wrong direction halfway through. The code, data, and system should remain the property of you as the client, not the builder. And involve planners and operational staff early. They know best which rules actually apply on the shop floor, including the unwritten ones.

Seeing this in your own operations?

Book a call

Frequently asked questions

What does it cost to have a custom TMS built?

It varies considerably depending on scope and complexity. Custom software requires a higher initial investment than a SaaS licence. The payback period depends on how much manual work, errors, and workarounds you currently have. An honest business case starts with mapping those hidden costs.

How long does it take to build a custom TMS?

A phased approach built around milestones typically delivers a first working version within a few months. A fully developed system in production takes longer. Preparation, specifically documenting your operational rules in detail, largely determines the pace.

Who can develop a custom TMS for a transport company in the Netherlands?

There are parties that build custom TMS solutions, but the distinction matters: some agencies deliver a system and then step away. A Software Operating Partner stays involved until the system is genuinely running in production and the client owns the code and data.

When is a standard TMS better than a custom solution?

When your transport processes largely match the standard, when your organisation is still changing rapidly, or when you cannot currently handle the management burden of custom software. In those cases, automating the pain points in your existing system with an AI layer delivers more value.