Key takeaways
- Cost is driven by scope, integrations, and team — not page count.
- Phase spend against a KPI instead of one large up-front number.
- Build vs. integrate decisions move budgets the most.
- Budget for operation and optimization, not just the build.
What actually drives the cost
Three factors move a budget far more than visual design or the number of screens:
- Scope & complexity — a marketing site is a fraction of a transactional platform with accounts, payments and workflows.
- Integrations — each system you must connect (ERP, CRM, POS, payment, logistics) adds engineering and testing.
- Team & timeline — speed costs money; a larger team ships faster but raises the rate.
Phase your spend
Rather than committing to a single multi-year figure, scope a focused first phase against one measurable outcome — say, cutting manual order processing by 60%, or lifting checkout conversion. Price that phase, ship it in weeks, and expand once it proves return.
This protects budget, builds internal confidence, and means a misjudged assumption costs one phase, not the whole program.
Build vs. integrate
The single biggest lever on cost is deciding what to build custom and what to wrap around proven tools. A good partner pushes you to integrate wherever an off-the-shelf product fits, and reserves custom engineering for what genuinely differentiates you.
Don't forget run cost
The build is not the finish line. Budget for cloud hosting, monitoring, security, and a monthly optimization cycle. A platform that is launched and abandoned quietly loses the value it was built to create.