---
title: Legacy Kosten Kalkulator
description: How Much Does Your Legacy System Really Cost? Calculate the annual costs associated with operation, maintenance, risks, and lost productivity.
image: https://vialutions.com/hubfs/Office%20scenes/jqp_20241202_362-Edit.jpg
---

Legacy Cost Calculator v3

# What Does Your Legacy System Really Cost?

Calculate the annual cost of operations, maintenance, risks and productivity losses.

Many legacy systems appear stable at first glance. However, the real costs arise from slow changes, manual workarounds, missing documentation, outage risks and increasing maintenance effort.

This calculator makes hidden costs visible – as an initial guide for system takeover, stabilization or modernization.

TCO Estimate Maintenance & Operating Costs Risk & Downtime Costs Modernization Comparison

✓Real-Time Calculation Directly in Your Browser

✓Scenarios for Typical Business Situations

✓Break-Even Comparison for Modernization

[Start Calculator](https://vialutions.com/legacy-kosten-kalkulator#legacy-kalkulator)3 minutes · no obligation · no data transmission

## Legacy Rarely Costs Only IT Budget.

Visible costs are usually maintenance, operations and licenses. The truly critical costs often arise in business departments, manual processes, slow changes and a lack of transparency.

### Direct Costs

Maintenance, support, operations, infrastructure and licenses.

### Hidden Costs

Downtime, rework, workarounds, sources of error and technical debt.

### Opportunity Costs

Slow changes, blocked innovation and lost productivity.

Cost Analysis Tool

## Calculate Your Legacy Costs.

Adjust the parameters to your situation. The results update automatically.

Scenario Templates

Custom Input

Small Team / Laboratory

Mid-Sized Company

Software Vendor / ISV

### Basic Configuration

Core parameters of your legacy situation.

Number of Affected Systems / Applications

Systems

Number of Active Users

Users

Age of the Legacy Software

12 years

Codebase Size

Small (<10k LOC)

Medium (10–100k LOC)

Large (>100k LOC)

### Personnel Costs of Legacy Operations

Direct costs for operations, maintenance, quality assurance and validation.

Developer Hours per Month for Maintenance

40 h/month

Developer Hourly Rate

€/h

QA/Regulatory Hourly Rate

€/h

QA/Validation Hours per Month

20 h/month

### Infrastructure & Licensing Costs

Servers, hosting, third-party licenses and support contracts.

Annual Server / Hosting Costs

€/year

Annual Third-Party License & Support Contract Costs

€/year

### Hidden Risk & Opportunity Costs

Cost drivers that are often not clearly visible in traditional IT budgets.

Compliance / Operational Risk Level

Low

Medium

High

Critical

Average System Downtime per Year

24 h/year

Cost per Hour of Downtime

€/h

Audits / Critical Reviews per Year

per year

Productivity Loss Due to Legacy Workarounds

8 %

Average Annual Salary of Affected Employees

€/year

### Modernization Investment Comparison

Estimate of a one-time investment for reengineering, modernization or controlled replacement.

Estimated One-Time Modernization Costs

€

Expected Maintenance Cost Savings After Modernization

50 %

Result

Total Cost of Legacy Operations

—

Estimated per Year

Direct Costs**—**

Risk Costs**—**

Productivity Loss**—**

Infrastructure**—**

Cost per Month**—**

### Cost Breakdown

 

 

### Does This Sound Like Your System Landscape?

VIALUTIONS supports the takeover, analysis, stabilization and modernization of production legacy systems.

[Book a No-Obligation Consultation](https://vialutions.com/de/kontakt?hsLang=en)

Print Result / Save as PDF

## What the Calculation Reveals

The calculator is not an exact financial assessment, but an indicative model. It helps make typical legacy-system cost drivers visible in a structured way.

The analysis becomes particularly relevant when systems are business-critical but poorly documented, difficult to maintain or usable only through workarounds.

### Typical Next Steps

1Analysis of the Existing System

2Identification of Risks and Quick Wins

3Development of a Realistic Modernization Strategy

4Implementation During Live Operations

## Let’s Talk About Your Legacy Systems.

Whether takeover, stabilization or modernization: we review your situation systematically and provide an honest assessment.

✓Reverse Engineering and Documentation of Evolved Systems

✓Stabilization and Further Development During Live Operations

✓AI-Assisted Analysis and Rapid Prototypes

### Next Step

Briefly tell us which systems are affected. We will assess what a sensible starting point could look like.

[Contact Us](https://vialutions.com/de/kontakt?hsLang=en)

Note: All calculations are estimates and serve as an initial guide. A reliable assessment requires a specific analysis of your system landscape, processes, risks and operating data.

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