Custom PrestaShop Module Development: Real Cost Guide for 2026

The cost ranges

From a senior freelance PrestaShop developer in 2026:

• €1,200 – €2,500 — focused module. One specific feature, no external integrations. Examples: custom homepage block, advanced product filter, conditional discount, custom email template. 1–2 weeks of work.
• €2,500 – €4,500 — standard custom module. Integration with one external service or API: payment gateway, single shipping carrier, basic accounting export, custom checkout flow, custom configurator. 2–3 weeks.
• €4,500 – €8,000 — complex module. ERP synchronization, multi-warehouse stock with real-time updates, B2B pricing rules with role-based catalog, marketplace integration (Amazon, eBay), custom invoicing for Spanish fiscal compliance. 4–6 weeks.
• €8,000+ — module systems. Multi-vendor marketplace, B2B portal with custom workflows, complex order routing across multiple warehouses. Effectively a small project on top of PrestaShop. 6–10 weeks.

What makes a module expensive

The base coding cost is rarely the bottleneck. Three factors push the price:

• External API quality. A module talking to a clean Stripe/SEPA API takes a couple of weeks. The same module talking to a 1990s SOAP ERP with no docs takes four. The dev cost is mostly figuring out the other side, not writing PrestaShop code.
• Multi-version compatibility. PrestaShop 1.7, 8.x and 9.x have different APIs in places. A module that needs to run on all three versions takes 30% more time than one that only needs to run on 8.x.
• Spanish fiscal compliance. NIF validation, recargo de equivalencia, retention rules, SII export, Verifactu — each adds discrete cost because you need to know the regulation, not just the code.

Modules I build most often

The ten most common custom modules in my recent work:

• ERP sync (Holded, A3, SAP Business One, custom REST APIs) — €3,500–€6,000.
• Custom shipping carrier (real-time rates + tracking via API) — €1,800–€3,500.
• B2B pricing rules (role-based catalog, hidden products by group) — €2,500–€4,000.
• Custom payment gateway (when official module doesn't exist) — €2,000–€3,500.
• Marketplace export (Amazon, eBay, Idealo) — €4,000–€7,000.
• Spanish invoicing compliance (Verifactu, SII, Facturae) — €2,500–€4,500.
• Custom product configurator (made-to-measure with live preview) — €2,500–€5,000.
• Loyalty / referral system beyond what built-in offers — €2,000–€3,500.
• Custom email transactional system with personalization — €1,500–€2,800.
• Subscription / recurring billing for PrestaShop — €3,000–€5,000.

Marketplace module vs custom: when does each make sense

The PrestaShop addons marketplace has thousands of modules from €60 to €300. They are great for generic problems. They are wrong for specific problems.

Buy from marketplace when: the feature is generic (basic SEO, sliders, simple email), the developer is reputable, you have flexibility on the exact behaviour. Most stores should use 80% marketplace modules for the boring stuff.

Pay for custom when: a marketplace module is 80% there but missing the specific behaviour you need, your business depends on the integration working perfectly, you cannot accept the maintenance cycles of a third-party developer, or the marketplace simply has nothing.

The most expensive thing is paying for a marketplace module + paying me to extend it because the original is poorly written. That happens. The audit before quoting tells you which path.

How modules survive PrestaShop upgrades

Modules built on conventions survive 1.7 → 8 → 9 with minimal touches. Modules that override core files break with every upgrade and become a money pit.

• Use hooks, not core overrides. The PrestaShop hook system is stable across versions.
• Use Symfony services in 8.x+. Avoid legacy controllers when there is a Symfony alternative.
• Avoid hardcoded SQL when ORM is enough. ORM survives schema migrations; raw SQL doesn't always.
• Test on staging. Every module update goes to staging before production. This sounds obvious; many developers skip it.

How to budget a module

1. Start with the integration partner. Are their docs decent? Is there a sandbox/test environment? Does someone reply when you email support? If the answer to any of those is "no", multiply your budget by 1.5.
2. Decide between marketplace + extension or full custom. If a marketplace module covers 70%+, extension is cheaper. Below that, go custom from day one.
3. Add 20% for in-scope adjustments. Same as MVPs — feature creep is universal.
4. Plan for one PrestaShop major upgrade per year. Around 4–8 hours of compatibility work depending on module complexity. €260–€520/year on top.

Want a written quote for your specific module? I do free 30-minute scoping calls — share the integration spec and I quote in 24 hours. More about my PrestaShop service.

Frequently asked questions