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ROI comparison custom software and standard software

ROI Calculator: Custom Software vs. Standard Software

When does your own solution pay off? Compare ongoing license costs with one-time development costs and find your break-even point.

In brief

Break-even by team size

For 20 to 50 users, custom-software break-even typically sits at 24 to 36 months. The licence per user and the user count move the month.

Compare licences with a custom build

ROI calculator

Custom software vs. off-the-shelf software

When does custom development pay off compared to ongoing license costs? Adjust the values to your situation.

Step 1 of 617%
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5500

How the custom-software break-even is built

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

    One-off investment and recurring operating components are added separately.

  3. 3. Apply multipliers

    Volumes, time values and rates are multiplied where the model converts effort or incidents into monetary effects.

  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

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

Ongoing license costs add up – especially with a growing user count and annual price increases. Our ROI calculator shows at what point a custom software solution becomes more cost-effective than standard software with a licensing model. Adjust the values to your situation and get an initial assessment.

Particularly critical: License costs often grow exponentially with user count. Every new employee increases the monthly bill, and annual price adjustments come on top. At the same time, standard software ties you to the roadmap and pricing policy of a single vendor. Custom software eliminates this vendor lock-in and gives you full control over feature scope, data sovereignty, and long-term cost development.

Licence tiers and vendor lock-in

The table splits the month by team size. Vendor lock-in and poor fit sit beside the cost curve.

License Costs Rise

The annual rise is an input in the calculator. It hits the standard-software licence curve, not maintenance of the custom system.

Vendor Lock-In Is Costly

Dependence on one vendor means: accept rising prices or migrate at high cost. Custom software gives you control.

Flexibility Pays Off

Custom software adapts to your processes – not the other way around. That saves workarounds, training, and frustration.

Typical Break-Even Periods

12–24 months
Large Teams (50+ users)
  • High license costs per user
  • Significant price increases
  • Specific requirements
24–36 months
Medium Teams (20-50 users)
  • Moderate license costs
  • Growing user count
  • Process optimization
36+ months
Small Teams (< 20 users)
  • Low license costs
  • Stable user count
  • Strategic reasons

Finance Your Investment: Leasing & Grants

The upfront spend can be spread over 72 months. Whether the rate sits below the licences you stop paying is what the calculator shows with your user count. Terms are on the software financing page.

Depending on the project, custom software development may qualify for current KfW products or active German state programs. go-digital has ended, and Digital Jetzt ended on 31 December 2023. Check the conditions in force before the project starts. The funding calculator matches programmes to the case.

FAQ

Custom Software vs. Standard Software

Break-even & Costs

When does custom software pay off compared to standard software?

For 20 to 50 users, break-even typically sits at 24 to 36 months.

From 50 users the range shortens to 12 to 24 months. Under 20 users it is 36 months or more. The table on this page splits the cases.

What hidden costs come with standard software?

Beyond pure license costs, there are often costs for: customization and configuration (consulting), training after updates, data migration when switching vendors, workarounds for missing features, premium support packages, and compliance certificates.

These costs are often underestimated when making licensing decisions.

What does custom software maintenance cost?

Typically 10-20% of the initial development costs per year.

This includes security updates, bug fixes, monitoring, and minor adjustments. Unlike standard software, you control the budget and priorities yourself.

How accurate is the ROI calculator?

The calculator provides an initial estimate based on typical industry benchmarks.

Actual costs depend on factors such as team size, technology stack, integration depth, and compliance requirements. For a reliable calculation, we recommend a free initial consultation.

Björn Groenewold – Geschäftsführer Groenewold IT Solutions

Calculate custom software ROI

We advise on effort, break-even and licensing alternatives.

Book a call

Benefits & Flexibility

Which factors have the biggest impact on break-even?

The three biggest influencing factors: (1) Number of users – the more, the faster the break-even, (2) Monthly license costs per user, (3) Annual price increase of the standard solution.

Use the sliders in the calculator to test the sensitivity.

Does the calculator account for vendor lock-in?

The calculator focuses on direct costs.

Non-monetary benefits such as vendor independence (no vendor lock-in), higher data security, better scalability, and tailored processes are additional arguments for custom software that often further improve the actual ROI.

What happens when my requirements change?

With standard software, you depend on the vendor's roadmap.

With custom software, you adapt features exactly to your needs – without waiting for the next release or booking expensive consulting packages.

What happens after the break-even?

After that, you save real money every month.

While standard software license costs continue to rise, your maintenance costs for the custom solution remain stable.

The difference grows every year – with 50 users and €56 license costs per user, that quickly adds up to €21,000 – 35,000 in savings per year after the break-even.

Can I split the development into phases?

Yes, we recommend an MVP approach (Minimum Viable Product).

Start with the core features that deliver the most value and expand step by step. This spreads the investment across multiple budget periods, reduces risk, and lets you measure the ROI already after the first phase.

How does software leasing affect the break-even?

Leasing eliminates the high upfront investment and spreads costs into predictable monthly payments.

This shifts the accounting break-even slightly backward, but cash flow is positive from month one – especially when the leasing rate is lower than the saved license costs.

ROI calculators

Inputs in the licence comparison

Which inputs move the licence comparison

Four checks before you read the table: user count, licence per user, annual price rise, and what in-house maintenance replaces.

  1. 1. Place the team size

    Under 20 users the range is 36 months or more. 20 to 50 users sit at 24 to 36 months. From 50 users, 12 to 24 months.

  2. 2. Set the licence per user

    Monthly price times users is the status-quo curve. The development range is the investment frame, not the saving.

  3. 3. Apply the rise only to licences

    The annual increase hits standard software. Maintenance of the custom system follows a different rate.

  4. 4. Note lock-in beside the curve

    Vendor lock-in and poor fit are not on the cost curve. They belong in the business case.

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 custom software ROI? Contact us.

After using the custom software ROI 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 custom software ROI 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.