What does custom system development cost?

Custom system development is about a business’s inner machinery: order systems, planning tools, case-handling workflows, and administration. These systems rarely show on the outside, but they determine how efficiently the company operates. The pricing picture differs from apps and websites because most of the work sits in business logic, data models, and integrations rather than in public interfaces. Here’s what you can expect in 2026.

Price ranges for custom systems

The very simplest internal tools can start under half a million, but for systems that carry a central part of the business, SEK 500,000–10 million is the realistic range. Where in the range you land is decided by the number of processes, the number of integrations, and how much data needs to be migrated from old solutions.

The hourly rate is SEK 950–1,600 – but the hours decide

Established Swedish agencies typically charge SEK 950–1,600 an hour for system development in 2026, depending on role and seniority. The difference between a cheap and an expensive quote, though, rarely lies in the hourly rate but in the number of hours – and in how well those hours are used.

A team that asks the right questions early often builds less. More system projects are saved by cutting features no one would use than by shaving a hundred kronor off the hourly rate.

Requirements work is your biggest cost risk

The single biggest risk in a system project isn’t the technology but unclear requirements. When “the system should handle invoicing” turns out to mean three different things to finance, sales, and management, the wrong thing gets built – and rebuilding mid-project is the most expensive kind of development there is.

Here’s how you buy that risk away:

• Start with a feasibility study. A few weeks of requirements work with workshops and prototypes costs a fraction of a wrongly built module.
• Prioritize in tiers. Separate what must exist on day one, what can come in phase two, and what would just be nice to have someday.
• Appoint a decision-maker. One person on your side who can answer questions on an ongoing basis saves weeks of waiting and guesswork.

Fixed price or time and materials?

Both models occur in system projects, and they distribute risk differently.

Fixed price fits when the scope is well defined, for example after a feasibility study. The price becomes predictable, but the vendor prices in the uncertainty – expect a risk premium, and expect changes to be handled as add-ons.

Time and materials fits when the requirements are expected to evolve during the project. You pay for actual time and can redirect along the way, but you need to stay on top of prioritization yourself. A common middle ground is time and materials with a budget cap and a check-in per phase – you keep the flexibility without giving up cost control.

A worked example

A manufacturing company wants to replace spreadsheet-based production planning with its own planning system: a resource view, an order connection to the business system, and simple reporting. A three-week feasibility study produces a picture of the requirements and a phased plan. Phase one – the core workflow with one integration – comes to SEK 1.2 million and six months. Phase two, with reporting and more roles, is estimated at SEK 600,000 but is only decided once phase one has been used in production. The total cost becomes known step by step, and every krona is tied to a decision instead of a guess.

Don’t forget life after launch

A business system lives a long time – often ten years or more. Budget for maintenance: bug fixes, security updates, and ongoing improvements. A common rule of thumb is 15–25% of the development cost per year. That sounds like a lot, but it’s how the system keeps matching a business that keeps changing.

Want a price range for your system? Get in touch with a short description of the process you want to support, and we’ll come back to you with an honest assessment – even if the answer turns out to be that an off-the-shelf system is enough.