🇩🇪
.NET modernization cost calculator

.NET modernization costs: estimate upgrade and architecture

Estimate framework upgrade, cloud readiness, modularisation, tests, CI/CD and modern user interfaces.

.NET modernization costs

The .NET Modernization cost calculator provides an immediate, non-binding cost range without requiring an email address or registration. It combines your project inputs with documented calculation rules and experience from more than 250 software projects.

  • Instant result without email or registration
  • Transparent inputs and calculation path
  • One-off and recurring cost components separated
  • Non-binding guidance based on real project experience

Read the documented calculation methodology

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.

.NET modernization calculator

Loading calculator…

How the .NET Modernization cost calculator calculates your range

The calculation follows six visible stages. All figures remain planning values until scope and assumptions have been reviewed.

  1. 1. Capture inputs

    The calculator records the visible project, volume, complexity and operating parameters selected on this page.

  2. 2. Add fixed components

    Fixed base modules and selected add-ons are added without mixing them with recurring charges.

  3. 3. Apply multipliers

    Quantity, complexity and scope factors multiply only the cost components identified for them in the calculator model.

  4. 4. Create the range

    The calculator applies its documented lower and upper uncertainty factors to the base result; ROI views keep investment and savings visible separately.

  5. 5. Round and calibrate

    Monetary result fields are rounded to the nearest whole euro. Public project-cost components are calibrated with the centrally maintained display factor.

  6. 6. Classify the result

    The result is shown as non-binding guidance. A binding quote requires scope, data, integrations, risks and acceptance criteria to be reviewed.

Included

  • Inputs shown in the calculator
  • Calculator-specific base values and factors
  • Displayed one-off and recurring result components

Not included

  • Requirements not selected in the calculator
  • Unknown data migration and third-party licence costs
  • Taxes, legal advice and a binding delivery commitment

Efficiency or discount factor: A central display factor of 0.7 is applied to public project-cost components to keep all calculators aligned with the currently reviewed pricing basis. It is not a customer-specific discount; customer-entered wages, revenues and existing operating costs are not reduced.

Why this is not a binding quote: The calculator cannot verify complete requirements, third-party dependencies, data quality, legal constraints or acceptance criteria.

Technical responsibility and review

Technical owner
Björn Groenewold
Role
Managing Director and software engineer
Expertise
Software development and software estimation
First published
Last technical review
Price basis
September 2026

Costs for .NET Modernization depend on scope, risk, and quality expectations. The calculator provides an initial range.

Sizing costs for .NET Modernization

  • 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 alongside the calculator.

Cost examples

All cost examples for this calculator

Modernise .NET in controlled stages

Calculator overall range

EUR 14,280 – 310,111 excl. VAT

The overall range is derived from the valid parameters of the relevant cost calculator.

Typical duration

3 to 15 months

Main risk drivers

  • - Outdated NuGet dependencies
  • - Missing regression tests
  • - Big-bang rewrite without productive intermediate releases
Example scenario: Medium codebase without full tests: a safety net, framework upgrade and CI/CD form the first modernization stage.

Non-binding indication

This result is only a non-binding indication based on typical assumptions. Effort and price must be calculated individually for your project.

FAQ

.NET modernization costs

Upgrade and architecture

What does a .NET modernization cost?

A focused framework upgrade often starts EUR 14,280 – 310,111 excl.

VAT. Modularisation and cloud readiness increase analysis and refactoring effort.

When is an upgrade to current .NET enough?

An upgrade is enough when architecture and business logic are still sound and the main goals are support, security or deployment improvements.

When should a monolith be modularised?

When releases block each other, modules scale differently or changes regularly create unexpected side effects.

Björn Groenewold – Geschäftsführer Groenewold IT Solutions

Create a .NET roadmap

We review the framework, dependencies and target operations model.

Testing and operations

Why does test coverage affect cost?

Automated tests make behaviour visible and reduce manual regression.

Without tests, a safety net must be built before larger changes.

What does cloud-ready .NET include?

Configuration, logging, health checks, containers, automated deployments and decoupled state are prepared for reproducible operations.

How does Groenewold IT deliver .NET projects?

Modernization is delivered Made in Germany in Leer, East Frisia, in measurable stages with direct architecture and operations feedback.

Typical pricing models (overview)

Comparison: typical pricing models for software and IT projects
ModelWhen it fitsBudget & flexibilityTypical 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 & MaterialDiscovery, 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 packageOngoing 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.

What determines the costs, and what comes next?

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 Dotnet Modernization? Contact us.

After using the Dotnet Modernization 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 Dotnet Modernization 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.