Running a boutique in 2026 means you need more than just a fancy card reader. You need proper inventory management, customer data that actually helps you sell, and a retail pos system that doesn't crash during your busiest Saturday afternoon. But here's the thing, most POS systems either cost a fortune or lack the features you actually need.
We've spent months testing Shopify POS, Epos Now, and SumUp specifically from a UK boutique owner's perspective. Not the generic "it's great for retail" nonsense you'll find elsewhere. This is about which system actually works when you're dealing with size variants, seasonal stock changes, and customers who want to return something they bought online.
Let's cut through the marketing fluff and figure out which epos system deserves your money.
The Quick Reality Check
Before we dive deep, here's what you need to know upfront:
Shopify POS makes perfect sense if you're already running your online store through Shopify. The integration is genuinely seamless, and you won't be manually updating stock counts across two platforms. But if you're not using Shopify online? You're paying for features you don't need.
SumUp is the affordable option that works brilliantly for single-location boutiques or market traders. It's simple, transparent pricing (2.75% per transaction), and there's no complicated monthly contracts. The downside? It doesn't scale well if you're planning to open a second location.
Epos Now sits in the middle, more expensive than SumUp, more flexible than Shopify. It's the proper epos now till system that growing boutiques actually need. We'll explain why it often ends up being the smartest choice, despite the higher upfront cost.
Pricing: What You'll Actually Pay
Let's talk money, because that's usually where these comparisons fall apart.
SumUp's pricing is refreshingly simple. You'll pay £29 for the card reader (one-time), then 2.75% per card transaction. No monthly fees, no surprises. For a boutique doing £50,000 in annual card sales, that's about £1,375 in fees. Straightforward.
Shopify POS gets complicated quickly. The Lite plan costs £29/month, but you'll need the full Shopify plan (£25-£79/month) to get decent features. Then there's transaction fees, 2% if you use Shopify Payments, but up to 2.4% plus 25p per transaction if you don't. For that same £50,000 boutique, you're looking at £600-£900 in monthly costs plus transaction fees.
Epos Now typically runs between £25-£60/month depending on your hardware bundle, plus around 1.75-2.75% transaction fees through their integrated payment partners. Yes, it's more expensive than SumUp initially, but you're getting a completely different level of system. For boutiques planning to grow beyond one location, it's worth checking out our detailed Epos Now review to understand the full cost breakdown.
Inventory Management: The Make-or-Break Feature
This is where most boutiques actually live or die. You can't sell what you think you have in stock.
Shopify POS genuinely excels here if you're running both online and offline sales. When someone buys your last medium blue dress online, it immediately shows as unavailable in-store. Size variants, colour options, low-stock alerts, it's all built properly. The problem? You need to be deep in the Shopify ecosystem to justify it.
SumUp offers basic inventory tracking. You can add products, track quantities, and generate simple reports. For small independent boutiques with 200-500 SKUs, it's probably enough. But there's no automatic purchase orders, no seasonal inventory planning, and the variant handling is pretty basic. If you stock five colours in four sizes, you're managing 20 separate SKUs rather than one product with variants.
Epos Now treats inventory like a proper business system should. Multi-location stock transfers, automated reorder points, supplier management, and comprehensive variant handling. You can even integrate with fashion-specific apps through their AppStore for things like seasonal planning or trend forecasting. It's designed for real retail operations, not just card processing with inventory tacked on.
The Customer Data Question
Here's something most comparisons skip: what actually happens with your customer information?
Shopify POS builds detailed customer profiles automatically. Purchase history, preferences, email addresses, it's all collected and synced with your marketing tools. You can send targeted emails about new arrivals in their preferred style. The customer loyalty features are genuinely useful, not just token gestures.
SumUp collects basic transaction data but doesn't build robust customer profiles. You'll get receipts sent by email, but you're not building a marketing database. For boutiques that rely on personal relationships rather than email marketing, this might not matter. For boutiques trying to scale, it's a limitation.
Epos Now sits somewhere in between. You can build customer profiles, track purchase history, and integrate with marketing platforms. It's not quite as polished as Shopify's approach, but it gives you the data you need without forcing you into a specific marketing ecosystem.
What About Multi-Location Boutiques?
If you're running more than one location, or planning to, this matters enormously.
SumUp simply isn't built for multi-site operations. You can technically run multiple terminals, but there's no centralized inventory management or reporting across locations. It's designed for single-location businesses.
Shopify POS handles multiple locations reasonably well. You can transfer stock between stores, see consolidated reports, and manage staff permissions by location. It works, though some boutique owners find the location-based pricing structure expensive as you scale.
Epos Now was designed from the ground up for multi-location retail. Stock transfers happen in real-time, you get consolidated reporting across all sites, and you can manage everything from your phone. For boutique chains with 2-5 locations, it's the obvious choice. The Epos Now system really shines in this scenario.
The "But I Also Do Markets" Scenario
Lots of UK boutiques supplement their main location with weekend markets or pop-up events. This is where mobility matters.
SumUp absolutely dominates here. It's a mobile-first system that runs perfectly on your phone or tablet. Battery lasts all day, 4G connectivity works fine, and the card reader is genuinely pocket-sized. You can literally run your entire pop-up from your phone, and it costs almost nothing.
Shopify POS works on mobile but feels like a compromise. You'll need good connectivity, a decent tablet, and you're still paying those monthly fees even though you're only using the mobile features occasionally.
Epos Now offers mobile functionality, but it's clearly optimized for fixed retail locations rather than market trading. You can do it, but you're paying for features you won't use when you're standing in a field in Kent selling vintage dresses.
Integration and Future-Proofing
What happens when you want to add accounting software, booking systems, or specialized retail tools?
Shopify POS integrates beautifully with thousands of apps, but mostly Shopify-ecosystem apps. Xero accounting? Sorted. Klaviyo email marketing? Perfect. Custom boutique management tools? Probably not.
SumUp offers limited integrations. You can export to accounting software manually, but there's no automatic sync with most business tools. For small boutiques that keep things simple, this isn't a dealbreaker.
Epos Now provides a proper AppStore with retail-specific integrations. Payment processors, accounting platforms, loyalty programs, and industry-specific tools. It's built like a business system that expects you to connect other business systems to it.
So Which Should You Actually Choose?
Here's our honest recommendation based on different boutique scenarios:
Choose SumUp if:
- You're a single-location independent boutique
- You do markets or pop-ups regularly
- You want the cheapest pos system that actually works
- Your inventory is under 500 SKUs
- You don't need complex customer marketing
Choose Shopify POS if:
- You already sell online through Shopify
- Customer data and marketing integration matter enormously
- You can justify the monthly cost through online/offline synergy
- You want the most polished user experience
Choose Epos Now if:
- You have or plan multiple locations
- You need proper business-grade inventory management
- You want to integrate with other business systems
- You're willing to invest in a scalable system
- You need comprehensive reporting and analytics
For most independent UK boutiques planning to grow, we'd honestly recommend checking out Epos Now's full offering. Yes, it costs more upfront. But you won't outgrow it in 18 months when you open that second location or need proper seasonal inventory planning.
The Bottom Line
There's no universal "best" retail pos system for boutiques: it depends entirely on your specific situation. SumUp wins on affordability and mobility. Shopify POS wins if you're already invested in their ecosystem. Epos Now wins on scalability and professional features.
The mistake most boutique owners make? Choosing the cheapest option now and paying to switch systems in two years when they've outgrown it. That's why we generally recommend Epos Now for serious boutique businesses: it's the system you won't need to replace.
Want more detailed comparisons? Check out our comprehensive guide to the best POS systems for UK businesses or dive into our individual reviews of Shopify POS, SumUp, and Epos Now.
Whatever you choose, get a proper demo first. Don't commit based on website screenshots. Actually see how the system handles your specific products, your pricing structure, and your typical Saturday afternoon chaos. That's the only way to know what will actually work for your boutique.