Shopify Plus builds in the US typically run $35,000 to $220,000, plus the Plus subscription itself ($2,300+/mo). Plus engagements skew toward mid-market and enterprise brands needing custom checkout, multi-store, or scripts.
Bottom of range: clean Plus theme with Launchpad and scripts. Top of range: 3-locale Plus setup with custom apps, B2B Plus, and a deep replatform from Magento or BigCommerce. The single biggest predictor of where a specific engagement lands is scope discipline, operators who lock the spec in the first two weeks save 20-40% of total project cost over the next three months. Operators who let scope expand mid-build pay the inverse penalty. Either way, the $35K to $220K range is descriptive, not prescriptive: it reflects what a competent US vendor charges in 2026 for the work as scoped, not what a finished engagement has to cost.
| Component | Low | High |
|---|---|---|
Discovery and architecture | $5K | $25K |
Custom theme build or Polaris-grade Plus theme | $15K | $80K |
Custom Shopify Functions or app development | $5K | $60K |
Multi-store configuration + Markets | $3K | $20K |
Klaviyo Plus + Postscript or Attentive setup | $4K | $18K |
Replatform / data migration | $3K | $25K |
Server-side measurement + Looker Studio dashboards | $3K | $12K |
Post-launch CRO retainer (3 months included) | $0 | $25K |
Discovery and architecture
Custom theme build or Polaris-grade Plus theme
Custom Shopify Functions or app development
Multi-store configuration + Markets
Klaviyo Plus + Postscript or Attentive setup
Replatform / data migration
Server-side measurement + Looker Studio dashboards
Post-launch CRO retainer (3 months included)
Every 'small addition' that turns up in week three is a real change order. Operators who lock scope in discovery save 20-40% of total project cost.
CRM imports, redirect maps, third-party API wiring, and content migration are the most underestimated line items in dev projects.
Conventional design is fixed-bid territory. Custom motion, bespoke components, and editorial illustration push costs up 30-100%.
Senior US engineers cost 2-3x junior engineers but ship 5-10x faster on non-trivial work. Cheap teams are usually expensive in retrospect.
Sites where the client writes all the copy ship faster and cheaper than sites where copy is in scope. Most projects underestimate this.
We typically scope Plus engagements at $55,000-$140,000. That's the band for brands replatforming from Magento or BigCommerce, multi-region Plus setups, and Plus brands rebuilding their architecture. We won't take Plus engagements under $35,000 because we cannot deliver them well at that scope. The premium over the floor of the market reflects scope we don't itemize, measurement infrastructure, post-launch stability, and a documented handoff that survives whoever happens to be on our team six months from now. Our proposals are itemized line-by-line so you can see what you're paying for; we'd rather lose the deal on transparent pricing than win it by hiding the math.
From $22K
fixed project
Shopify and headless storefronts built to compound, not just launch.
Full E-Commerce Stores breakdownStay on standard Shopify until you genuinely need Plus's specific features (custom checkout, scripts, multi-store, B2B Plus). Most brands sub-$5M ARR are paying for capability they don't use. The honest framing: cheaper vendors exist at every tier, Fiverr at the bottom, offshore agencies in the middle, established US-based mid-market shops at the top. The cost-quality curve is real but rarely linear. Going from a $5K vendor to a $15K vendor usually produces a meaningfully different outcome; going from $15K to $45K often produces a refinement, not a transformation. Where you sit on that curve depends on the cost of being wrong, not the budget you have available.
Project cost ÷ (incremental contribution profit from features only Plus enables, e.g., checkout customization lifting conversion rate, multi-store enabling new geo)
Brand replatforming at $85K with a 0.7-point conversion-rate lift on $1.5M/mo topline, 40% gross margin → $42K/mo incremental gross profit → payback in 2 months. Real range is 3-9 months.
We'll send back an itemized proposal, scope, line items, timeline, and the team that would actually run the engagement. No discovery call to schedule a discovery call.