Shopify Plus quotes span a genuinely enormous range, and unlike some pricing questions, that range isn't mostly noise. A $12,000 theme customisation and a $150,000 headless rebuild are both real, legitimate prices for real, legitimately different projects. The trick is knowing which one you're actually buying before you compare numbers.
What the Numbers Actually Look Like
Theme customisation, from around $15,000 to $25,000. Deep customisation of a premium theme, Dawn, Prestige, Impulse, without a full ground-up rebuild. The right tier when your requirements fit within what a strong existing theme framework can flex to accommodate.
Full custom storefront, from around $40,000. Discovery, a genuinely custom theme build, and core integrations. This is where most serious Shopify Plus projects land, and it's the tier that includes real content architecture and conversion-focused UX work, not just a reskin.
Headless Hydrogen, from around $80,000. A separate Next.js/Remix frontend layered on Shopify's Storefront API, for stores that need sub-100ms performance targets or a level of design freedom Liquid genuinely can't support. Roughly 30-40% more than an equivalent standard build, because you're building and maintaining two connected systems instead of one.
Complex B2B or multi-store builds, often $100,000+. Native B2B wholesale portals running alongside D2C, multi-store expansion, deep ERP integration, these scale with the number of distinct workflows and systems involved, not just page count.
What's Separate From the Build Cost
Shopify Plus itself carries its own platform fee, starting from roughly $2,300/month, entirely separate from whoever builds your store. This is a recurring cost regardless of agency choice, and it's worth budgeting into the three-year total cost of ownership alongside the build and any ongoing development retainer.
Why a $15,000 Quote and a $60,000 Quote Aren't Comparable
They're usually quoting different products. The cheaper one is frequently a well-executed theme customisation, genuinely appropriate for some businesses. The more expensive one is architected around specific integrations, custom checkout logic via Shopify Functions, or a B2B commerce layer the cheaper build simply doesn't include. Comparing them on price alone, without confirming they're actually quoting the same scope, is how businesses end up disappointed with either the outcome or the invoice.
A direct question worth asking any quote: "If our catalogue doubled and we added a wholesale channel next year, would this build handle it, or would we be looking at a second project?" A cheap build that can't answer that well is sometimes the more expensive choice within eighteen months.
What to Budget for After Launch
Ongoing development and support typically starts around $8,000 to $10,000 a month for a dedicated architect handling feature development, CRO testing, and performance monitoring. Most merchants move onto a retainer within 60 days of launch, once routine feature requests start arriving faster than an ad-hoc arrangement can reasonably handle. See our full guide on choosing a Shopify Plus agency for what to check before you commit to any of these numbers.
FAQ
What's a realistic budget for a Shopify Plus build?
A full custom Shopify Plus storefront typically starts around $40,000. Theme customisation on an existing store rather than a full rebuild can start lower, around $15,000 to $25,000. Headless Hydrogen builds, which add a separate frontend application, generally start around $80,000.
Does Shopify Plus itself have a platform fee on top of development cost?
Yes. Shopify Plus's own platform fee starts from roughly $2,300 a month, separate from any development or agency cost, and scales with revenue at higher tiers. This is a recurring cost to budget for regardless of which agency builds the store.
Why do Shopify Plus quotes vary so much between agencies?
The biggest driver is whether the quote is for a genuinely custom build or a premium theme with configuration. A $15,000 quote and a $60,000 quote for what sounds like a similar project are often quoting fundamentally different deliverables, one is a theme with your branding applied, the other is architected around your specific catalogue, integrations, and B2B or headless requirements.
What ongoing costs come after launch?
Beyond the Shopify Plus platform fee, budget for ongoing development and support, typically starting around $8,000 to $10,000 a month for a dedicated architect handling feature development, CRO testing, and performance monitoring. Most merchants move to a retainer within the first 60 days of launch as routine feature requests start outpacing an ad-hoc arrangement.