VB6 replacement costs: budget the migration of your Visual Basic application
Estimate the budget for replacing your VB6 application – by size, target platform and state of the code base, including legacy data migration and parallel operation.
VB6 replacement cost calculator
Costs for VB6 Replacement depend on scope, risk, and quality expectations. The calculator provides an initial range.
Sizing costs for VB6 Replacement
- Binding quotes follow a short scope alignment
- Include operations, maintenance, and potential grants
- Many mid-market digitalization projects may qualify for funding
Transparent quoting
- Milestones and documented assumptions
- Clear exclusions in the quote
- Consulting and development delivered from Germany
We quote transparently with dedicated contacts from East Frisia.
Sample calculations & scenarios
Concrete project profiles with assumptions and indicative budgets—useful for internal alignment before the calculator.
Use the calculator right below for an instant first estimate – no sign-up and no fixed-price commitment. We align scope, risks, and assumptions in a conversation before a binding quote.
Cost calculator
FAQ
VB6 replacement costs
VB6 budget
What does replacing a VB6 application cost?
Small VB6 tools with a few forms can be replaced from around EUR 18,000–30,000 excl. VAT. Grown business applications with many screens, reports and interfaces run EUR 40,000–90,000, large systems above that. The calculator narrows the range by size, target platform and the state of the code base.
Redevelopment or automatic VB6 conversion – which is better?
Automatic converters often produce hard-to-maintain code that preserves the old structures. In most projects, a structured redevelopment that carries over the business logic is more economical: the code becomes modern, testable and cleaned of legacy baggage – with a predictable budget.
Why does an undocumented code base make the project more expensive?
If only the source code exists and the original developers' knowledge is gone, the business logic has to be reconstructed through code analysis and interviews. That adds roughly 45% – an upfront code audit (from about EUR 4,500) creates clarity early.
Discuss your VB6 replacement
We analyse your VB6 application, assess risks and recommend the most economical migration path.
Migration & operations
Desktop, web or hybrid – which target platform makes sense?
A modern desktop application (.NET) is the most direct path and often the most economical option for workstation software. A web application (+25%) makes the solution location-independent; the hybrid approach with desktop client and web backend (+50%) combines offline capability with centralised data.
How risky is continuing to run VB6 in 2026?
The VB6 IDE has not been developed since 2008; the runtime only ships for compatibility reasons. Every Windows update can cause problems, developers with VB6 knowledge are getting rare, and interfaces to modern software (REST APIs, cloud) are barely feasible. The longer the replacement waits, the more expensive it gets.
How does parallel operation work during the migration?
With parallel operation (from about EUR 4,500), old and new systems run side by side for a transition period – with data reconciliation and defined cut-over dates per module. That minimises risk: production never stops, and every function is validated in real operation before the VB6 application is switched off.
Typical pricing models (overview)
| Model | When it fits | Budget & flexibility | Typical risks |
|---|---|---|---|
| Fixed price (fixed scope) | Clearly defined scope, stable requirements, repeatable delivery. | Predictable total cost; little room for change without a change order. | Scope creep leads to change orders or quality trade-offs. |
| Time & Material | Discovery, legacy, evolving requirements, or close collaboration. | Maximum flexibility; budget transparent via hourly or daily rates. | Without prioritisation, effort can grow—backlog and reviews matter. |
| Retainer / maintenance package | Ongoing operations, updates, small features, and support. | Agreed capacity per month; predictable follow-on cost. | Large changes may still need a separate estimate. |
| Hybrid (milestone + T&M) | MVP or phased releases with clear go-lives, then iterate. | Core delivery fixed price; extensions on a time-and-materials basis. | Define contractually what is in scope vs. extra work. |
Calculators on this page provide indicative ranges; we choose the right model with you based on risk, scope, and planning horizon.
Costs & next steps
The ranges shown are indicative. For a binding quote we discuss scope, priorities and funding options in a free intro call. Many digitalization projects qualify for grants – try our funding calculator.
Browse all cost calculators, explore services and typical solutions. Questions about Vb6 Replacement? Contact us.
After using the Vb6 Replacement calculator, validate assumptions in a short intro call.
What we align in the call
- Scope, risks, and funding options
- Milestones and documented exclusions
- Transparent quote without hidden line items
Costs for Vb6 Replacement in context
- Scope, risk, and quality expectations drive the range
- Include operations, maintenance, and grants
- Dedicated contacts and short paths from East Frisia
Browse all cost calculators in the costs overview.