Gymshark's site went down for 8 hours during a major sale. Cost: an estimated £100,000 in lost revenue. Bombas grew from 500 to 4,000 daily transactions and watched their checkout break — costing $15,000 in minutes. Neither company received a warning. The platform didn't send an alert. The checkout just stopped working during the biggest day of the year.
The question isn't whether to migrate. It's whether you can survive the journey — because 83% of migration projects exceed their budget, but 90% of completed migrations improve revenue.
The platform doesn't send a warning. Your checkout just stops working during your biggest sale.
The Signals That Matter
Operators often frame replatforming as a feeling: "I think we've outgrown Shopify." Feelings aren't decision criteria. Revenue events are.
What Migration Actually Costs
The budget you set is almost certainly wrong. Here's what migration actually costs across three scenarios:
| Component | Small Store (< 1K SKUs) | Mid-Market (1K–10K SKUs) | Enterprise (10K+ SKUs) |
|---|---|---|---|
| Platform migration (dev + data) | $2,000–$15,000 | $15,000–$75,000 | $75,000–$500,000 |
| SEO recovery (traffic loss period) | 1–3 months, 10–15% drop | 2–4 months, 15–30% drop | 4–12 months, 20–40% drop |
| App/integration rebuilds | $500–$3,000 | $5,000–$25,000 | $25,000–$100,000 |
| Team retraining | 1–2 weeks | 2–4 weeks | 1–3 months |
| Opportunity cost | Low | $50K–$200K in delayed initiatives | $200K–$2.3M in foregone campaigns |
| Timeline | 2–8 weeks | 3–9 months | 6–14 months |
| Post-migration maintenance (Year 1) | 10–20% of project cost | 10–20% of project cost | 10–20% of project cost |
The SEO Tax Nobody Plans For
Even perfect migrations lose organic traffic. The question is how much and for how long.
| Migration Quality | Traffic Drop | Recovery Timeline | Permanent Loss Risk |
|---|---|---|---|
| Well-executed (all redirects, URL mapping, structured data) | 10–30% in Month 1 | 90–95% recovery within 30 days, full recovery by 90 days | Minimal |
| Average execution (most redirects, some gaps) | 20–40% in Month 1 | 4–12 weeks before improvement begins | 5–10% permanent |
| Poor execution (missed redirects, broken canonical tags) | 30–60% drop | 6–12 months — or never fully recovers | 15–30% permanent |
| No SEO planning | 50%+ drop | Average 523 days to recover (17 months) | Significant |
The Decision Framework
Step 1: Calculate the Cost of Staying
Add up what your current platform costs you — not the subscription, but the total cost:
- Monthly platform fees + transaction fees + app subscriptions
- Developer hours spent on maintenance (not features)
- Revenue lost to platform limitations (checkout failures, missing features, slow load times)
- Opportunity cost of features you can't build
Step 2: Calculate the Cost of Leaving
Use the table above to estimate your migration scenario. Add 30% buffer — 83% of projects exceed their budget.
Step 3: Compare Over 3 Years
Step 4: Check Your Timing
Migrate during your slowest quarter. Never during peak season. J.Lindeberg migrated in 16 weeks and saw 70% revenue growth — but they timed it for their off-season.
Three Operator Profiles
Profile 1: Solo DTC, 200 SKUs, $15K/Month on Shopify
App costs hit $600/month. Transaction fees are $360–$435/month. Total platform spend: ~$1,100/month on Basic Shopify.
Stay. At this revenue, migration to WooCommerce would cost $5K–$10K and save ~$400/month in transaction fees. Break-even: 12–25 months. Not worth the SEO risk and operational disruption. Revisit at $50K/month.
Profile 2: Growing Brand, 3,000 SKUs, $80K/Month on Shopify
Transaction fees: $1,920–$2,320/month. App costs: $1,200/month. Site slowing during promotions. Need B2B pricing tier that requires Plus ($2,300/month).
Consider migrating. Total Shopify cost at Plus: ~$5,800/month. WooCommerce equivalent: ~$2,500/month (hosting + maintenance). Savings: ~$3,300/month = $39,600/year. Migration cost: $25K–$50K. Break-even: 8–15 months. The math works — if you have developer resources.
Profile 3: Enterprise, 40K SKUs, $500K/Month on Custom Legacy
Site crashes during sales. Integration with new 3PL impossible on current architecture. 6-person dev team spends 70% of time on maintenance.
Migrate. The dev team maintenance cost alone is $300K+/year on a platform that's actively limiting revenue. Migration to Shopify Plus or modern headless: $200K–$500K upfront, but frees 4 developers ($200K+ annually) and eliminates crash risk during peak. Daniel Wellington cut licensing costs 50% after migrating from Commercetools to Shopify Plus.
When Not to Migrate
Related Decisions
- The eCommerce Platform Decision Framework — If you've decided to leave, this framework helps you choose what to move to. Constraint-based evaluation, not feature lists.
- The Real Cost of Your eCommerce Tool Stack — Sometimes the problem isn't the platform — it's the 15 apps bolted onto it. Audit your tool stack before assuming the platform is the issue.
