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KNOWLEDGE BASE

Custom Software or Off-the-Shelf? A 5-Year TCO Comparison

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Table of Contents — English

Why Is Starting Cost Misleading?

The first year of off-the-shelf software really does look cheap. Starting license fees on platforms like Shopify, Salesforce, or Odoo are low; setup is quick. But as your business processes grow and become more complex, the real picture starts to emerge. Year-over-year increasing license fees, paid apps added for each new need, developer hours hired for customization, IT time spent resolving performance issues, and most critically — work you can't do because of software limits — all constitute costs not visible on invoices.

Example Scenario: 50-Person Mid-Scale Company

  • Off-the-shelf ERP (Odoo Enterprise-like): Year 1 — 80,000 TRY license + 60,000 TRY customization developer = 140,000 TRY
  • Year 2-3: License increases 15% = 92,000 TRY/year + new plugins 30,000 TRY/year = 122,000 TRY/year
  • Year 4-5: Growing user count pushes license to 110,000 TRY + comprehensive customization request 150,000 TRY
  • 5-year total: ~760,000 TRY
  • Custom development for same company: Year 1 development 500,000 TRY + subsequent years 75,000 TRY/year maintenance
  • 5-year total for custom: ~800,000 TRY — but savings begin from year 4 and flexibility is unlimited

Opportunity Cost: The Dimension That Can't Be Quantified

The hardest to include in a TCO calculation but the largest factor is opportunity cost. Everything you can't do because of off-the-shelf software's customization ceiling is an opportunity cost: you couldn't design a customer experience to differentiate from your competitor; you couldn't offer your customers a unique self-service portal. Custom software lifts this constraint.

Decision Framework: Which Is Right for You?

The answer isn't the same for every company. Answer these four questions: 1) Are your business processes standard for the sector, or unique to you? (Unique = lean toward custom) 2) Is software part of competitive advantage, or just an operational tool? (Competitive advantage = custom is much more meaningful) 3) Will your 5-year growth targets strain your current system? (Yes = transitioning now is cheaper) 4) Can your team's technical capacity manage off-the-shelf customization? (No = external dependency cost grows)

FREQUENTLY ASKED QUESTIONS

Depending on data migration and parallel operation period, 4-8 months is a typical transition duration. With proper planning, SEO loss, data loss, and operational interruption can be prevented.

Update speed depends on the scope of the maintenance agreement. In PROJX Digital's SLA-based maintenance model, critical security patches are applied within 24-48 hours; routine updates are made in monthly sprint cycles.

With a well-planned data migration project, data loss risk is minimized. In all PROJX Digital migration projects, source-to-target data verification (checksum) is done and both systems are run in parallel before go-live.

Look at process uniqueness more than size. For a 10-person company with complex industry-specific processes, custom software can be very meaningful. Starting with an MVP approach keeps the budget under control.

Yes — a hybrid approach is possible. For example, while using an established system like Logo for accounting, a custom application managing the operational process can be developed. An integration layer connects the two.

Key Takeaways

  • Starting cost is misleading; the real decision should be based on a 5-year TCO comparison.
  • Opportunity cost — work that can't be done due to off-the-shelf software limitations — is the largest item in the TCO calculation.
  • In the 50-person mid-scale company scenario, both models reach similar total cost over 5 years; but custom software offers unlimited flexibility.
  • The four-question decision framework quickly clarifies which model is right for your company.
Content Owner: Projx Digital
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