Something most agencies won't tell you: Shopify is the right answer for most e-commerce businesses. Under a million in annual revenue with fairly standard operations, it beats a custom storefront at a fraction of the cost.
But there's a clear line where the $79/month plan stops being a bargain. The platform tax of apps, transaction fees, performance ceilings and design lock-in compounds faster than most operators realize. Here's the honest math on Shopify vs custom: when to stay, when to go headless and when to leave.
What the $79/mo plan actually costs you
Sticker price runs $39–$399 a month by tier, but that's the smallest part of the bill. Most stores end up with 8–15 apps: Klaviyo, Yotpo, ReCharge, a page builder, search, popups, loyalty, returns.
| Item | Range |
|---|---|
| Shopify subscription | $79 |
| Apps | $200–$800 |
| Card processing (2.4–2.9% + 30¢) | $1,200–$1,450 |
| Theme and agency maintenance | $300–$2,000 |
The five thresholds where Shopify breaks
- About $2M+ in annual GMV
- Site speed bottlenecks conversion (themes score 50–70 on mobile)
- You need configurators, B2B pricing or custom checkout
- Your app bill tops $1,500 a month
- Your brand needs content, community and editorial, not just commerce
At $2M, a 1% cut in transaction costs is $20,000 a year, most of a custom build. You're also in Shopify Plus territory at $2,300+ a month. And an app bill over $1,500 a month means you're paying for a custom build in installments. Replacing five SaaS apps with one custom feature is often a wash in month one and strongly positive by year two.
Speed is the quiet one. Hydrogen and custom Next.js storefronts routinely score 95+ on Lighthouse, and every 100ms of load time correlates with roughly 1% of conversion. Custom features are the loud one: configurators, negotiated B2B pricing, localized multi-currency or gated VIP content can be hacked into Shopify, but each hack adds an app and more fragility. If you're also building a content hub, community and editorial brand, you'll spend more time wrestling Liquid than building experiences.
The three escape routes
- $2,300–$3,000/mo base
- $15,000–$40,000 theme rebuild
- Keeps Flow and the Shopify ecosystem
- $30,000–$90,000 build
- $200–$600/mo hosting plus Plus
- Shopify still runs checkout and PCI
- $80,000–$300,000+ build
- $500–$2,500/mo to operate
- Q1B2B, marketplace or hardware integrations?YesCustom from day one.
- Q2$10M+ GMV with complex requirements?YesHeadless on Shopify Plus, or fully custom if needs are truly unusual.
- Q3$2M–$10M GMV, and performance or UX is a growth lever?YesHeadless on Shopify. Best ROI in this range.
- Q4$500k–$2M GMV with standard operations?YesStay on Shopify, but invest in a real theme and an app audit.
- Under $500k with simple SKUs: stay on Shopify and don't overthink it.
What you gain, and what you give up, going headless
You do give things up: some apps won't work outside a standard theme, Shop Pay works with caveats, marketing loses the drag-and-drop theme editor unless you add a CMS, and each new feature takes longer to ship.
The 18-month cost of ownership
Headless looks pricier on paper. But a 15% conversion lift on $3M adds $450,000 in revenue over 18 months, and it pays for itself many times over.
How to actually run the decision
- 1Sum 12 months of invoicesShopify plus every app. That's your real platform cost.
- 2Measure speedMobile LCP, CLS and INP from Search Console field data.
- 3Get three real quotesTwo headless Shopify studios and one fully custom.
- 4Project the conversion liftEven 10% usually beats the build cost over 18 months.
- 5Pick your windowRight after Q4: capacity, lower traffic and time to settle before peak.
Frequently asked questions
Is Shopify worth it for a small business?
For most stores under $1M GMV, yes. It handles taxes, payments, PCI and fraud that would cost a fortune to build.
What's "headless Shopify"?
Shopify stays the backend for inventory, cart, checkout and orders, while your storefront is custom code in Next.js or Hydrogen.
Will my SEO survive a Shopify migration?
Done properly, yes, and it usually improves. Keep URLs or map 301 redirects, keep structured data, and never let the site go dark during cutover.
How long does a Shopify-to-headless migration take?
For 50–500 SKUs, plan on 8–14 weeks, including design, build, content migration, redirects, QA and a phased launch.
Want us to model your situation from your invoices and performance numbers? Get in touch for a free 30-minute audit, or read how we approach custom web development.
