The verdict in three sentences
Below 1.2M EUR in annual GMV, Shopify Plus remains the rational choice: predictable cost, short time-to-market, zero technical debt. Above it, platform fees of 0.15 to 0.5% turn your growth into rent for the vendor, and a headless build at 40,000-80,000 EUR pays back in 18 to 30 months. The right call is not a technical preference but a volume threshold you can calculate precisely.
Shopify Plus vs custom headless: the line items that matter
The classic trap is comparing a monthly subscription to a project cost. You must reason in total cost of ownership (TCO), variable fees included. Shopify Plus charges a monthly base plus a percentage of every transaction, while a custom build flips the logic: large upfront investment, low marginal costs.
| 2026 line item | Shopify Plus | Custom headless build |
|---|---|---|
| Upfront cost | 0-8,000 EUR (setup) | 40,000-80,000 EUR |
| Subscription / hosting | ≈2,300 EUR/mo | 600-1,500 EUR/mo |
| Platform fees | 0.15-0.5% of GMV | 0% |
| PSP fees (cards) | 1.4-2.9% + 0.25 EUR | 1.2-2.5% + 0.20 EUR |
| Checkout flexibility | Limited (Plus eased) | Total |
| Time-to-market | 3-6 weeks | 12-18 weeks |
| Vendor lock-in | High | None |
Platform fees are the real issue: at 3M EUR GMV, 0.3% is 9,000 EUR/year gone, regardless of your margin.
The tipping point: when should you migrate?
The threshold is found by comparing Shopify's variable overcost (platform fees + subscription delta) to the amortization of the build. Here are 2026 orders of magnitude for a 60,000 EUR build amortized over 3 years.
| Annual GMV | Shopify overcost/yr* | Build saving/yr | Verdict |
|---|---|---|---|
| 600,000 EUR | ≈4,600 EUR | negative | Stay on Shopify |
| 1.2M EUR | ≈9,200 EUR | ≈-11,000 EUR | Tipping zone |
| 2M EUR | ≈16,000 EUR | ≈-4,000 EUR | Study seriously |
| 3M EUR | ≈24,000 EUR | ≈+4,000 EUR | Migrate |
| 5M EUR | ≈40,000 EUR | ≈+20,000 EUR | Migrate fast |
*Platform fees 0.4% + subscription overcost vs custom hosting. Beyond the threshold, net savings reach 15,000-45,000 EUR/year.
3-year TCO: the full picture
| Scenario (GMV 3M EUR) | Shopify Plus | Headless build |
|---|---|---|
| Upfront | 5,000 EUR | 60,000 EUR |
| Subscription 36 mo | 82,800 EUR | 32,400 EUR |
| Platform fees 3 yrs | 36,000 EUR | 0 EUR |
| Maintenance / evolutions | 18,000 EUR | 27,000 EUR |
| 3-year TCO | 141,800 EUR | 119,400 EUR |
At 3M EUR GMV, the build is already ≈22,000 EUR cheaper over 3 years, before counting conversion gains from an optimized checkout and front end.
Mini case study
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Claire, CFO of a Berlin apparel e-tailer, runs 2.8M EUR of GMV on Shopify Plus. She pays 27,600 EUR/year in subscription and 11,200 EUR/year in platform fees (0.4%). A headless build at 65,000 EUR cuts recurring costs to ≈14,000 EUR/year. Annual saving: ≈24,800 EUR. Gross ROI: 65,000 / 24,800 ≈ 2.6 years, down to ≈22 months once you add +1.2 conversion points (≈34,000 EUR of extra revenue). Decision: migration approved over 14 weeks.
FAQ
What does a Shopify-to-headless migration really cost in 2026?
Budget 40,000-80,000 EUR depending on catalog and integration complexity (ERP, PIM, marketplaces). A median project for a 3,000-8,000 SKU catalog sits around 55,000-65,000 EUR.
At what revenue does migration pay off?
The 2026 tipping point is around 1.2M EUR of GMV/year. Below it, stay on Shopify; above 3M EUR, migration generates 15,000-45,000 EUR of annual savings.
How long does the project take?
Between 12 and 18 weeks for a full headless build, including catalog migration, PSP integration, testing and DNS cutover. A phased architecture limits commercial risk.
Will we lose SEO during migration?
With an exhaustive 301 redirect plan and frozen URLs, the loss stays under 5% for 4-8 weeks, then traffic recovers, often above the initial level thanks to performance gains.
Can we keep Shopify for some functions?
Yes: a hybrid approach (Shopify as catalog back office, headless front end) is common and cuts the upfront budget by 20-30%.
Let's scope your project. Share your GMV, current stack and target integrations: we'll quantify the tipping point and 3-year TCO for your volume. Detailed quote within 48 h. WhatsApp +221 77 596 93 33.
Mohamed Bah
Fondateur, Kolonell
Passionate about digital and entrepreneurship in Africa, Mohamed has been helping Sénégalese businesses with their digital transformation since 2020. Founder of Kolonell, he believes every SME deserves a professional and accessible online présence.