Custom ecommerce development costs $80,000 to $500,000+ in 2026. A D2C storefront with custom checkout and 1,000 to 5,000 SKUs costs $80,000 to $150,000. A B2B platform with tiered pricing, customer-specific catalogs, and ERP integration costs $150,000 to $350,000. A full marketplace with multi-vendor management, payment splitting, and complex fulfillment logic costs $300,000 to $500,000+. Madgeek has rebuilt ecommerce platforms delivering 40%+ sales increases after migration from Shopify Plus.
What does a D2C custom ecommerce platform cost?
A direct-to-consumer custom ecommerce platform costs $80,000 to $150,000 and takes 14 to 20 weeks to build. This includes a headless frontend (Next.js or React), product catalog, cart and checkout, payment integration, order management, and customer accounts.
The cost sits at the lower end when the product catalog is straightforward: simple variants (size, color), standard pricing, and a single warehouse. Cost rises toward $150,000 when the store needs configurable products, subscription billing, loyalty program integration, or multiple fulfillment sources.
The primary advantage over Shopify Plus at this price point is checkout control. Custom checkout flows convert 10 to 25% better than template checkouts because every step is designed around how the specific customer base buys, not around a generic flow built for all Shopify merchants.
What does a B2B ecommerce platform cost?
A B2B ecommerce platform costs $150,000 to $350,000 and takes 20 to 30 weeks to build. It includes everything in the D2C platform plus features that Shopify Plus and BigCommerce cannot support natively: tiered and negotiated pricing engines, customer-specific catalogs, bulk ordering, quote-to-order workflows, ERP integration, and credit terms management.
The pricing engine alone accounts for 15 to 25% of the total build cost. B2B pricing is rarely a simple discount matrix. It involves contract pricing per customer, volume-based tiers that compound across product families, and negotiated rates that override catalog prices. No off-the-shelf platform handles this without significant customization, and those customizations often cost $50,000 to $100,000 on top of the platform license.
ERP integration (SAP, NetSuite, Sage, or QuickBooks Enterprise) adds $30,000 to $60,000 depending on which system and how many data flows need to sync: inventory levels, pricing updates, order status, customer records, and invoice generation.
What does a marketplace cost to build?
A marketplace with multi-vendor management costs $300,000 to $500,000+ and takes 24 to 36 weeks to build. The cost is higher because marketplaces require infrastructure that single-vendor stores do not: vendor onboarding portals, payment splitting (Stripe Connect or equivalent), commission management, dispute resolution workflows, vendor-specific analytics, and marketplace-level reporting.
Payment splitting is the technical complexity that separates marketplace builds from standard ecommerce. Money flows from buyer to platform to vendor, with commission deduction, tax handling, and payout scheduling. Getting this wrong creates accounting nightmares. Getting it right requires careful integration with payment processors that support connected accounts and split payments.
How does custom compare to Shopify Plus, BigCommerce, and Magento?
The total cost of ownership over three years tells a different story than the sticker price of each platform. License fees, app subscriptions, transaction fees, and customization costs compound quickly on SaaS platforms.
Factor | Shopify Plus | BigCommerce Enterprise | Adobe Commerce (Magento) | Custom-Built |
|---|---|---|---|---|
Year 1 Platform Cost | $24,000 to $42,000 | $36,000 to $72,000 | $50,000 to $200,000 | $0 (no license) |
Build/Theme Cost | $30,000 to $80,000 | $25,000 to $60,000 | $80,000 to $200,000 | $80,000 to $500,000 |
App/Plugin Fees (Annual) | $6,000 to $24,000 | $3,000 to $12,000 | $5,000 to $20,000 | $0 (built in) |
Hosting (Annual) | Included | Included | $12,000 to $36,000 | $6,000 to $24,000 |
3-Year Total | $120,000 to $278,000 | $133,000 to $276,000 | $214,000 to $768,000 | $98,000 to $572,000 |
Best For | D2C brands under $10M revenue with simple catalogs | Mid-market retailers who need more API flexibility than Shopify | Large retailers needing full control with dedicated hosting team | $5M+ retailers with complex pricing, B2B, or multi-vendor requirements |
What drives ecommerce development cost up?
Product variant complexity is the most common cost driver. Simple variants (size, color) are straightforward. Configurable products where the buyer selects materials, dimensions, finishes, and optional components add 20 to 30% to the catalog module cost because each configuration needs pricing logic, inventory tracking, and visual representation.
Payment complexity adds cost when the store needs multi-currency support, split payments between vendors, installment plans, or invoice-based payment for B2B buyers. Each payment method requires its own integration, testing, and reconciliation logic.
Fulfillment complexity increases cost when orders need to route across multiple warehouses, support drop-shipping from vendors, or handle mixed fulfillment (some items ship from warehouse, others from vendor). Multi-warehouse routing alone adds $20,000 to $40,000 to the build.
Integration count scales linearly. Each external system (ERP, PIM, CRM, shipping provider, tax engine, marketing automation) adds $10,000 to $30,000 per integration. A store with eight integrations adds $80,000 to $240,000 to the base cost.
When does custom ecommerce make financial sense?
Custom ecommerce makes sense when the business has outgrown what Shopify Plus or BigCommerce can support without heavy workarounds. The clearest signals: you are paying for 5+ apps to cover gaps in your platform, your checkout conversion rate has plateaued, your B2B pricing logic requires manual intervention, or your catalog rules break the platform's native product model.
For retailers doing $5M to $200M in annual revenue, the Shopify Plus limitations become most visible in B2B workflows, complex catalog logic, and multi-channel fulfillment. Madgeek's custom ecommerce development services cover D2C, B2B, and marketplace builds. Companies evaluating a headless commerce architecture should also read the decoupling decision guide before committing to a platform choice.
Written by
Abhijit Das
CEO
Building AI tools for businesses from legacy to new age SaaS startups
LinkedIn ↗Need a team to build this for your business?