Shopify Migration Case Study: How a Brick-and-Mortar Pet Supply Store Moved from Square Online and Boosted Sales 34%
From Square Online to Shopify: A Pet Supply Store’s Complete Migration Story
When Pawsome Provisions, a family-owned pet supply store in Portland, Oregon, decided to expand beyond their physical storefront, they initially chose Square Online for its simplicity and tight integration with their existing Square POS. After 18 months of growing pains—limited customization, clunky inventory management, and restricted shipping options—they made the decision to migrate to Shopify. This case study documents every phase of their migration, from planning through execution, and reveals the measurable impact on their business.
Background: Why Square Online Wasn’t Cutting It
Pawsome Provisions opened in 2019 with a single retail location. By 2024, online orders accounted for roughly 25% of total revenue. Owner Rachel Nguyen identified several friction points with Square Online:
- Limited product variant handling: Pet food SKUs with multiple sizes, flavors, and formulas exceeded Square Online’s variant limits.- Inventory sync delays: Stock levels between the physical store and online shop were updating only every 15–30 minutes, leading to overselling.- Basic shipping configuration: Flat-rate shipping was the only viable option, making heavy items like 40-lb dog food bags unprofitable to ship.- Template restrictions: Customization options were limited, making it difficult to build a brand-forward experience with educational content about pet nutrition.
Migration Planning: Setting the Foundation
Step 1: Audit Existing Data
Before touching any migration tools, Rachel’s team cataloged every asset on the Square Online store: 847 active SKUs, 12 product categories, 2,300 customer records, and 14 months of order history. They exported everything into CSV files and cross-referenced inventory counts with a manual spot-check of warehouse shelves.
Step 2: Choose the Right Shopify Plan
After comparing Shopify Basic, Shopify, and Advanced Shopify, they selected the standard Shopify plan ($79/month at the time) for its professional reporting features and up to five staff accounts. The built-in POS Lite channel also allowed them to test Shopify POS alongside their existing Square terminal before fully committing.
Step 3: Map the Migration Timeline
They allocated a four-week migration window:
- Week 1: Theme selection, branding setup, and navigation structure.- Week 2: Product import, collection organization, and image optimization.- Week 3: Inventory sync integration, shipping configuration, and payment gateway setup.- Week 4: Testing, soft launch with existing customers, and DNS cutover.
Inventory Sync: The Critical Integration
The most technically demanding part of the migration was establishing real-time inventory synchronization between the physical store and Shopify. Rachel’s team evaluated three approaches:
| Solution | Sync Frequency | Monthly Cost | POS Compatibility |
|---|---|---|---|
| Shopify POS Pro | Real-time | $89/location | Native |
| Stocky (by Shopify) | Real-time | Included with POS Pro | Native |
| SKU IQ | Every 2 minutes | $45/month | Square + Shopify |
| Square-Shopify manual CSV | Manual/daily | Free | Both (manual effort) |
Shipping Setup: Solving the Heavy-Item Problem
Shipping was the second major pain point. A 35-lb bag of premium dog food cost $18.50 to ship via USPS Priority but was listed at a flat $7.99 shipping fee on Square Online, eating into margins. Here is how they restructured shipping on Shopify:
- Weight-based shipping rates: Items under 5 lbs shipped at $5.99; 5–20 lbs at $9.99; 20+ lbs at $14.99. These rates were calculated using Shopify’s carrier-calculated shipping with negotiated UPS rates.- Free local delivery: Orders within a 15-mile radius qualified for free same-day delivery using the Shopify Local Delivery app, driving a 40% increase in average order value from local customers.- Subscription shipping discounts: Recurring autoship orders (managed through the Recharge app) received a 15% shipping discount, encouraging customer retention.Shipping profitability improved immediately. The average shipping margin went from -$4.20 per order under Square to +$1.85 per order on Shopify within the first two weeks.
First-Month Sales Comparison: Square Online vs. Shopify
The numbers told a compelling story. Comparing the last full month on Square Online (September 2024) against the first full month on Shopify (November 2024), with October excluded as the transition month:
| Metric | Square Online (Sept) | Shopify (Nov) | Change |
|---|---|---|---|
| Total Online Revenue | $14,230 | $19,065 | +34% |
| Total Orders | 312 | 408 | +31% |
| Average Order Value | $45.61 | $46.73 | +2.5% |
| Cart Abandonment Rate | 74% | 61% | -13 pts |
| Returning Customer Rate | 28% | 39% | +11 pts |
| Shipping Cost per Order | $12.19 | $8.14 | -33% |
| Inventory Errors | 23/week | 2/week | -91% |
Lessons Learned
- Don’t rush the data audit. Two hours of manual inventory verification saved dozens of hours of post-migration corrections.- Run systems in parallel. The 48-hour POS overlap caught three sync issues that would have caused customer-facing problems.- Invest in shipping strategy early. Weight-based rates and local delivery were the single biggest margin improvement.- Leverage Shopify’s app ecosystem. Recharge for subscriptions, Klaviyo for email marketing, and Judge.me for reviews created a tech stack that far exceeded what Square Online could offer natively.
Frequently Asked Questions
How long does it take to migrate from Square Online to Shopify?
For a store with under 1,000 SKUs and a few thousand customer records, expect a 3–4 week timeline. The product and customer data import itself can be completed in a day using CSV exports, but configuring shipping rules, integrating inventory sync, setting up the theme, and thorough testing require the additional time. Larger catalogs or stores with complex discount structures may need 6–8 weeks.
Can I keep using Square POS in my physical store while running Shopify online?
Yes, tools like SKU IQ can bridge Square POS and Shopify with near-real-time inventory sync. However, Pawsome Provisions found that switching entirely to Shopify POS Pro delivered a more seamless experience with true real-time sync and unified reporting. If you depend on Square-specific hardware or contracts, a bridging tool is a viable interim solution.
Is the revenue increase typical when migrating from Square Online to Shopify?
Results vary significantly depending on your industry, existing traffic, and how well your previous platform was optimized. The 34% increase seen by Pawsome Provisions was driven partly by improved user experience and partly by operational fixes like accurate inventory and profitable shipping rates. Industry benchmarks suggest that merchants migrating from basic e-commerce platforms to Shopify typically see a 15–25% improvement in conversion rate within the first 90 days, primarily from Shopify’s optimized checkout flow.