Software development
Digitization in the middle class: How to measure your success
Digitization is no longer a trend for medium-sized enterprises, but a need to remain competitive. But how to measure the success of Digitalisie...
Data migration costs: estimate effort and cutover risk
Get a realistic budget range for your migration project.
In brief
Investment frame for data migration
The investment frame for a data migration is EUR 5,131 – 13,637,575 excl. VAT. Volume, quality and the target system move the project inside that band.
The upfront cost can be spread over 72 months. Terms are on the software financing page.
Related: legacy modernization.
Estimate the data move
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How the data migration range is built
The calculation follows six visible stages. All figures remain planning values until scope and assumptions have been reviewed.
1. Capture inputs
The calculator records the visible project, volume, complexity and operating parameters selected on this page.
2. Add fixed components
Fixed base modules and selected add-ons are added without mixing them with recurring charges.
3. Apply multipliers
Quantity, complexity and scope factors multiply only the cost components identified for them in the calculator model.
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. 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. 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
Sample calculations & scenarios
Concrete project profiles with assumptions and indicative budgets—useful for internal alignment alongside the calculator.
FAQ
Data migration costs
Effort drivers
Why is data migration rarely “just an export/import”?
Cleansing, deduplication, business rules and reconciliation usually dominate the timeline.
The calculator captures how messy sources and tight cutover windows amplify that work.
How do cutover constraints change pricing?
Near-zero-downtime cuts need continuous sync, extra testing and rehearsed failback.
Weekend-only windows look cheaper on paper but can hide overtime and rollback risk.
Want a migration runbook outline?
We align stakeholders on dry-runs, sign-off and communication.
Quality assurance
How do you prove nothing critical was lost?
Entity counts, checksums or hashed keys per batch plus targeted business samples.
For finance or compliance domains we document evidence per load.
Do we always need a custom migration tool?
No.
One-off migrations can rely on scripted pipelines if monitoring and rollback are explicit. Repeatable loads justify investing in reusable components.
Calculator, follow-up costs & next steps
Which factors determine the cost of a data migration?
The biggest lever is the data quality of the source systems: duplicates, inconsistent formats and missing mandatory fields noticeably increase the effort.
On top of that come the number of sources, the complexity of the field mappings and the scope of required transformations. You can roughly estimate these drivers in this cost calculator via data volume and number of systems.
Why is data quality so decisive for the budget?
Poor data quality is the most common reason for budget overruns in migration projects.
Every cleansing and clarification step takes time because business decisions are often needed. In our experience an upfront data profiling pays off to make the real effort visible early.
How are field mappings between old and new calculated?
Each mapping describes how a source field is transferred into the target system, including type conversions and rules for special cases.
Complex 1:n or n:1 relationships drive the effort because they require individual logic. In this cost calculator the number of objects to be mapped directly affects the estimated effort.
What role does validation of migrated data play?
Validation ensures that records arrive complete, correct and consistent in the target system.
Common methods are automated reconciliation of totals, sampling and business plausibility checks. This verification layer is not an optional extra but protects against expensive corrections after go-live.
How does a cutover work and what does it cost?
During the cutover the final data set is transferred within a defined time window and the legacy system is retired.
Cost drivers are the acceptable downtime, fallback scenarios and the dress rehearsal before the cutover date. A well-rehearsed cutover significantly reduces risk and follow-up costs.
What costs should I roughly expect?
Small migrations with clean data often range from the low four-figure to the lower five-figure area, while complex multi-system migrations can be considerably higher.
These ranges are values from our project experience, not fixed prices. The value in this cost calculator serves as a first orientation for your budget planning.
How the data migration is costed
How we honestly calculate your data migration
Quality check, mapping, test migration, and cutover—so data migration doesn't end 30% over budget.
1. Data quality check
We check source and target for data quality, duplicates, and inconsistencies. Cleanliness before migration saves expensive corrections later.
2. Mapping and migration scripts
We define mapping per data class and develop traceable migration scripts. Flat per data class.
3. Test migration and validation
We migrate into a test environment and check with the business. Typical bugs happen here—not at cutover.
4. Cutover and hypercare
We calculate cutover weekend and hypercare. So daily business stays stable.
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.
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 data migration? Contact us.
After using the data migration 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 data migration 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.