Hiring an ecommerce agency is one of the biggest investments an online business can make. Whether you are launching a new store, migrating platforms, or optimizing an existing operation, understanding what agencies charge and what you get at each price point helps you budget accurately and choose the right partner.
Key Takeaways:
- New ecommerce store builds range from $5,000 for basic Shopify setups to $75,000 or more for custom enterprise builds
- Ongoing optimization and management retainers typically run $2,000 to $10,000 per month
- Platform migrations cost $10,000 to $50,000 or more depending on catalog size and complexity
- The platform you choose significantly impacts both build and ongoing costs
- Cheaper is not always better; underspending on your ecommerce build often costs more in the long run
This guide breaks down real-world ecommerce agency pricing across services, platforms, and engagement models so you can plan with confidence.
Ecommerce Agency Services and Cost Ranges
New Store Builds
Building a new ecommerce store from scratch is the most common reason businesses hire an agency. Costs vary dramatically based on complexity.
Basic Store ($5,000 - $15,000)
- Template-based design with brand customization
- Up to 50 products loaded
- Standard payment gateway integration
- Basic SEO setup
- Mobile-responsive theme
- Typical timeline: 3-6 weeks
Mid-Range Store ($15,000 - $40,000)
- Custom design with unique branding
- Up to 500 products with structured categories
- Multiple payment and shipping integrations
- Advanced SEO and content strategy
- Custom functionality (product configurators, quote builders, subscription options)
- Third-party integrations (ERP, CRM, marketing tools)
- Typical timeline: 6-12 weeks
Enterprise Store ($40,000 - $75,000+)
- Fully custom design and user experience
- Unlimited product catalog with complex attributes
- Multi-currency and multi-language support
- Custom checkout flows and B2B functionality
- Headless commerce or composable architecture
- Performance optimization and load testing
- Advanced analytics and reporting dashboards
- Typical timeline: 12-24 weeks
Ongoing Optimization and Management ($2,000 - $10,000/month)
Most successful ecommerce businesses retain an agency after launch for continuous improvement.
Basic Retainer ($2,000 - $4,000/month)
- Platform maintenance and security updates
- Bug fixes and minor design adjustments
- Monthly performance reporting
- Basic conversion rate optimization
- Up to 10-15 hours of development time
Growth Retainer ($4,000 - $7,000/month)
- Everything in basic, plus:
- A/B testing and conversion optimization
- New feature development
- SEO content and technical optimization
- Email marketing integration and automation
- Quarterly strategy reviews
Full-Service Retainer ($7,000 - $10,000+/month)
- Dedicated account manager and development team
- Comprehensive digital marketing (paid ads, SEO, email, social)
- Advanced analytics and attribution modeling
- Product photography and content creation
- Marketplace expansion (Amazon, eBay integration)
- Strategic roadmap and growth planning
Platform Migration ($10,000 - $50,000+)
Migrating from one ecommerce platform to another is a complex project with significant risk if handled poorly.
Simple Migration ($10,000 - $20,000)
- Moving from one hosted platform to another (e.g., Squarespace to Shopify)
- Catalog of fewer than 1,000 products
- Standard product data transfer
- Basic design recreation or new template
- URL redirect mapping for SEO preservation
Complex Migration ($20,000 - $50,000+)
- Enterprise platform changes (e.g., Magento to Shopify Plus, or legacy system to modern platform)
- Large catalogs with 10,000 or more products
- Custom data transformations and cleanup
- Preservation of customer accounts, order history, and reviews
- Complex integration re-architecture
- Multi-store or multi-region setups
- Extensive QA and testing periods
Platform-Specific Pricing
The ecommerce platform you choose directly affects agency costs. Each platform has different development complexity, licensing fees, and ecosystem requirements.
Shopify and Shopify Plus
Shopify is the most popular platform for small to mid-sized ecommerce businesses, and Shopify Plus serves the enterprise segment.
- Basic Shopify store build: $5,000 - $25,000
- Shopify Plus build: $30,000 - $100,000+
- Ongoing management: $2,000 - $8,000/month
- Platform fees: $39 - $399/month (standard) or $2,300+/month (Plus)
- Why agencies like it: Liquid templating is straightforward, large app ecosystem reduces custom development needs
- Cost advantage: Lower development hours for standard features thanks to mature app marketplace
WooCommerce
WooCommerce runs on WordPress and appeals to businesses wanting full control over their store and hosting environment.
- Basic WooCommerce build: $5,000 - $20,000
- Custom WooCommerce build: $15,000 - $50,000+
- Ongoing management: $1,500 - $6,000/month
- Platform fees: Free (open source), but hosting runs $30 - $500+/month depending on traffic
- Why agencies like it: WordPress developer talent is abundant, unlimited customization
- Cost consideration: Ongoing maintenance is higher due to plugin updates, security patches, and hosting management
Magento (Adobe Commerce)
Magento serves mid-market to enterprise businesses with complex requirements.
- Magento Open Source build: $20,000 - $75,000
- Adobe Commerce build: $50,000 - $200,000+
- Ongoing management: $3,000 - $15,000/month
- Platform fees: Free (Open Source) or $22,000 - $125,000+/year (Adobe Commerce)
- Why businesses choose it: Handles massive catalogs, complex B2B, and multi-store setups natively
- Cost consideration: Magento developers command premium rates ($150 - $250+/hour), and hosting requirements are significant
BigCommerce
BigCommerce occupies a middle ground between Shopify and Magento, offering enterprise features on a SaaS platform.
- Standard build: $8,000 - $30,000
- Enterprise build: $25,000 - $80,000+
- Ongoing management: $2,000 - $7,000/month
- Platform fees: $39 - $399/month (standard) or custom enterprise pricing
- Why agencies like it: Strong built-in features reduce app dependency, good API for headless commerce
- Cost advantage: Fewer third-party apps needed compared to Shopify for mid-market features
Retainer vs. Project-Based Pricing
Understanding the difference between these two agency pricing models helps you choose the right engagement structure.
Project-Based Pricing
How it works: You pay a fixed fee for a defined scope of work with a clear start and end date.
Best for:
- New store builds and redesigns
- Platform migrations
- Specific feature development
- Businesses with a defined budget and timeline
Advantages:
- Predictable cost
- Clear deliverables and timeline
- Easier to compare proposals from multiple agencies
- No long-term commitment
Risks:
- Scope creep can inflate costs through change orders
- Agencies may cut corners to protect margins on fixed bids
- Post-launch support requires a separate agreement
Retainer Pricing
How it works: You pay a recurring monthly fee for an allocated block of agency time and services.
Best for:
- Ongoing optimization and growth
- Businesses that need continuous development support
- Brands investing in long-term ecommerce strategy
- Companies without in-house ecommerce expertise
Advantages:
- Consistent, prioritized attention from the agency
- Predictable monthly costs
- Ability to adapt focus based on business needs
- Builds deeper agency understanding of your business
Risks:
- Unused hours may not roll over
- Can feel expensive during slow periods
- Requires active management to direct the agency's time effectively
Most businesses start with a project-based engagement for the initial build, then transition to a retainer for ongoing management. This approach lets you evaluate the agency's work quality before committing to a long-term relationship.
What is Included at Each Price Tier
Understanding what you should expect at different investment levels helps you evaluate proposals and avoid agencies that over-promise and under-deliver.
Budget Tier (under $15,000 for builds, under $3,000/month retainer)
- Template-based designs with brand colors and logo
- Standard platform features without heavy customization
- Basic product upload and categorization
- Standard payment and shipping setup
- Minimal strategic guidance
- Communication primarily via email with weekly updates
Mid-Market Tier ($15,000 - $50,000 for builds, $3,000 - $7,000/month retainer)
- Custom design with user experience research
- Strategic planning and competitive analysis
- Custom integrations with business systems
- Conversion rate optimization and A/B testing
- Content strategy and SEO implementation
- Dedicated project manager
- Regular strategy calls and detailed reporting
Enterprise Tier ($50,000+ for builds, $7,000+/month retainer)
- Discovery workshops and comprehensive strategy
- Custom UX design with user testing
- Complex technical architecture
- Full integration with ERP, PIM, CRM, and marketing systems
- Performance engineering and scalability planning
- Dedicated cross-functional team
- Executive-level strategy and quarterly business reviews
How to Budget for Your Ecommerce Project
Calculate Total Cost of Ownership
The agency fee is only part of your total investment. Factor in:
- Platform subscription or licensing fees
- Hosting costs (for self-hosted platforms)
- Third-party app and plugin subscriptions
- Payment processing fees
- Content creation (photography, copywriting)
- Ongoing maintenance and support
Set Aside a Contingency
Ecommerce projects frequently encounter unexpected requirements. Budget an additional 15-20% beyond the quoted price for scope changes, additional integrations, or post-launch fixes.
Compare Apples to Apples
When evaluating proposals, ensure each agency is quoting on the same scope. Use your billing and invoicing tools to track actual spend against estimates throughout the project.
For a detailed estimate based on your specific requirements, try our project pricing calculator to model different scenarios before reaching out to agencies.
Red Flags in Ecommerce Agency Pricing
Watch out for these warning signs when evaluating proposals:
- No discovery phase: Agencies that quote without understanding your business are guessing
- Prices far below market: If a build quote seems too good to be true, expect compromises in quality, communication, or post-launch support
- Vague scope documents: Every deliverable should be clearly defined with acceptance criteria
- No mention of testing or QA: Testing should be a line item, not an afterthought
- Locking you into proprietary systems: Ensure you own your code and data if you leave
Making Your Decision
Choosing an ecommerce agency is about finding the right balance between investment and capability. The cheapest option rarely delivers the best return, but the most expensive agency is not automatically the best fit either.
Focus on agencies that demonstrate deep expertise in your chosen platform, ask thoughtful questions about your business goals, and provide clear, detailed proposals. Check references, review their portfolio for businesses similar to yours, and evaluate their communication style during the sales process, because that is exactly how they will communicate during your project.
Compare pricing models side by side to find the right fit. Our guide to agency pricing models breaks down the pros and cons of each approach, and our marketing agency cost guide offers useful benchmarks for related services.
Managing ecommerce agency engagements? AgencyPro helps agencies scope projects, track billable hours, and invoice clients with clarity. Book a demo to see how leading ecommerce agencies run their operations.