Most fashion brands discover the same thing as they grow: Shopify is brilliant at selling, but running a business requires a lot more than a great checkout. Inventory, purchasing, financials, wholesale, production — these live outside Shopify's world. And connecting them manually, through spreadsheets and re-keyed data, creates the kind of operational drag that limits growth.
This guide explains the three-platform stack that Seams Fashion ERP implements for fashion and apparel businesses across Australia: Shopify + Microsoft Business Central + TRIMIT. Each component has a specific role. Together, they create a single connected system that runs your entire operation — from the first click on your website to the despatch of the order and everything in between.
- The problem with Shopify alone
- The platform stack explained
- Platform 1: Shopify — your commerce front end
- Platform 2: Microsoft Business Central — your operational backbone
- Platform 3: TRIMIT — fashion-specific ERP
- Seams — integration and implementation layer
- How the platforms work together
- Key benefits for fashion brands
- Who is this right for?
- What implementation looks like with Seams
- Next steps
1. The problem with Shopify alone
Shopify is one of the best commerce platforms in the world. It handles product listings, checkout, payments, and basic order management elegantly. For a fashion startup, it's often everything you need. Shopify POS provides uncomplicated store check out that store staff love to work with.
But growth creates complexity. Fashion businesses deal with a level of product and operational complexity that most industries never encounter. A single style might come in six colours and twelve sizes — that's 72 SKUs for one product. Multiply that across a seasonal range and you're managing thousands of variants. Add in wholesale orders, offshore manufacturing, 3PL warehousing, and multiple retail stores, and you quickly reach the limits of what Shopify's native back-end can handle.
Here's what fashion brands running Shopify alone typically tell us:
- Inventory counts in Shopify don't match what's actually in the warehouse
- Orders have to be manually re-entered into accounting software
- Wholesale and retail stock is managed in separate systems
- Purchasing decisions are based on gut feel rather than real-time data
- End-of-month reporting takes days, not hours
- No single view of a customer across online, wholesale, and in-store channels
- New seasons require rebuilding the product catalogue from scratch in multiple places
The core issue isn't Shopify. It was designed to be a selling platform, not a business management system. Once you're managing genuine operational complexity, you need both — working together seamlessly. That's exactly what the Shopify + Business Central + TRIMIT stack delivers.
2. The platform stack explained
Each platform in the stack has a distinct role. None of them tries to do everything — they each do what they do best, and Seams connects them so the whole is far greater than the sum of its parts.
Data flows in both directions in real time. A sale on Shopify immediately updates stock in Business Central. A new product range created in TRIMIT pushes straight to your Shopify storefront. A purchase order received at the warehouse updates availability across every channel simultaneously. And Seams is the layer that makes all of that happen — and keeps it running.
3. Platform 1: Shopify — your commerce front end
Shopify's role in the stack is what it was built for: delivering a world-class buying experience for your customers. Product discovery, the checkout, payment processing, order confirmation, and shipping notifications all remain in Shopify — because Shopify does these things better than any ERP ever will.
In an integrated stack, Shopify becomes the customer-facing front end, while everything operational happens in Business Central behind the scenes. Your team still manages the Shopify storefront — product presentation, collections, promotions, and the customer experience — but the data that populates it (stock levels, product variants, pricing) comes from TRIMIT via the Seams integration, ensuring it's always accurate.
Shopify POS, used for in-store retail, is also fully integrated — every POS transaction flows into Business Central just like an online order would, giving you one unified view of the business.
4. Platform 2: Microsoft Business Central — your operational backbone
Microsoft Dynamics 365 Business Central is a cloud-based ERP (Enterprise Resource Planning) system built for growing businesses. It provides the financial and operational backbone that Shopify doesn't offer — and that every serious fashion business eventually needs.
Financial management
Full general ledger, accounts payable and receivable, bank reconciliation, and real-time P&L across all channels and locations.
Inventory control
Multi-location stock management with real-time visibility across warehouse, store, and in-transit stock — all connected to Shopify.
Purchasing & procurement
Purchase orders, supplier management, landed cost tracking, and receipt management — all linked to sales demand and Shopify orders.
Warehouse & fulfilment
Pick, pack, and despatch workflows that integrate with your 3PL provider or in-house warehouse, with tracking synced back to Shopify.
Customer management
One customer record spanning wholesale, retail, and e-commerce — with full order history, credit terms, and pricing rules.
Reporting & analytics
Built-in Power BI integration and real-time dashboards. Margin by product, channel, and season — without exporting to spreadsheets.
As a Microsoft cloud product, Business Central also benefits from regular updates, enterprise-grade security, and native integration with the full Microsoft 365 ecosystem — Outlook, Teams, and Excel all connect natively.
5. Platform 3: TRIMIT — fashion-specific ERP
Business Central is a powerful general-purpose ERP. But fashion has specific complexities — variant matrices, seasonal planning, collection management, B2B portals — that standard ERP systems handle clumsily. This is where TRIMIT comes in.
TRIMIT is an extension of Business Central developed specifically for fashion, apparel, and footwear businesses. It's not a bolt-on integration — it's embedded directly into Business Central, extending its data model and workflows to understand the way fashion businesses actually operate. Trimit have been working with Microsoft for over 30 years to provide a completely seamless integration with Business Central.
Style, colour, and size matrix management
In fashion, a "product" is rarely a single item. It's a style available in multiple colours across multiple sizes. TRIMIT manages this as a native matrix — so you can price, plan, order, and report at any level of the hierarchy, with this structure flowing directly into your Shopify product catalogue via Seams.
Season and collection planning
TRIMIT structures your product catalogue by season and collection, mirroring the way fashion brands actually plan. You can carry forward bestsellers, retire slow movers, and plan your range buy by season — all within the ERP, with changes automatically reflected in Shopify.
B2B wholesale portal
TRIMIT includes a built-in B2B ordering portal for wholesale customers. Retailers can browse your current collection, check live stock availability, and place orders — pulling data directly from your ERP. No separate platform, no manual order processing, no file uploads.
Supplier and production management
For brands manufacturing offshore, TRIMIT manages purchase orders to suppliers, tracks production milestones, and handles inbound shipment logistics. Landed costs — freight, duty, and handling — are allocated to individual products automatically, giving you true cost of goods.
Open-to-buy planning
TRIMIT's open-to-buy functionality helps buyers plan purchasing budgets by season, comparing planned versus actual spend against Shopify sales data — ensuring you're buying the right quantities to meet demand without over-investing in stock.
30+ years. 10,000+ users worldwide. TRIMIT has been building ERP solutions exclusively for fashion, apparel, and furniture industries for over three decades — making it one of the most specialised platforms available on the Microsoft stack. Seams is Australia's specialist TRIMIT implementation partner.
6. Seams — integration and implementation layer
Seams Fashion ERP is the most important element of the stack. We're not just a software reseller. Seams is the partner that makes the three platforms work together as one.
What Seams does
- Implements and configures Business Central for your specific business — chart of accounts, locations, pricing structures, and reporting
- Implements and customises TRIMIT to match your product hierarchy, seasonal workflows, and buying processes
- Builds and maintains the native bi-directional integration between Shopify and Business Central/TRIMIT
- Connects Shopify POS to your ERP so retail and online inventory and financials are unified
- Manages data migration from your existing systems — Xero, MYOB, spreadsheets, legacy ERP
- Trains your team and supports go-live with a managed cutover process
- Provides ongoing support, system updates, and continuous improvement post go-live
Why the partner matters as much as the platform
Fashion ERP implementation is not a plug-and-play exercise. The platforms are powerful precisely because they're flexible — and that flexibility requires configuration by people who understand both the technology and the industry. Seams has decades of experience working with Australian fashion and apparel businesses. Our clients include Carter's OshKosh, Columbia Sportswear, Sunseeker, Rodney Clark, and Jantzen — brands that trusted us to get this right.
When something goes wrong (and in any complex technology environment, something eventually will), you need a local team who knows your system, speaks your language, and can respond. That's what Seams provides — not a helpdesk ticket to a vendor overseas.
7. How the platforms work together
The integration Seams builds is a native, bi-directional, real-time data sync. It's not a third-party middleware platform, a file-based import/export, or a scheduled batch job. It's a live connection, built and maintained by Seams, that keeps all platforms in constant alignment.
What flows from Shopify into Business Central (via Seams)
- Online orders — created as sales orders in Business Central automatically and instantly
- Payments — posted to the correct payment method and bank account for reconciliation
- Refunds and cancellations — handled automatically with corresponding credit notes
- Shopify POS transactions — posted from each retail location with location-level coding
What flows from Business Central/TRIMIT into Shopify (via Seams)
- Product catalogue — styles, variants, pricing, and descriptions from TRIMIT push to Shopify
- Stock levels — updated in real time across all Shopify sales channels and locations
- Pricing — including promotional pricing, season pricing, and customer-group pricing
- Product images and metadata — managed in the ERP and published to Shopify automatically
- Fulfilment status — shipping and tracking information pushed back to Shopify customer orders
No middleware. No manual exports. No third-party connectors. The Seams integration is direct and real-time. When a customer places an order at 2am, it's in Business Central before the sun rises — ready to pick, pack, and despatch.
8. Key benefits for fashion brands
Eliminate double-handling across all platforms
Every hour your team spends re-entering data between systems is an hour they're not spending on the work that drives growth. The Seams integration eliminates data entry duplication — orders, products, customers, and stock all flow automatically between Shopify, Business Central, and TRIMIT.
Real-time inventory accuracy across every channel
Over-selling is damaging to your brand and frustrating for customers. With inventory managed centrally in Business Central and synced to Shopify in real time via Seams, your website accurately reflects what's actually available — including stock allocated to wholesale orders or in-transit from suppliers.
True margin visibility by channel, product, and season
Most Shopify brands can't answer the question: "What's our actual margin on this product, across all channels, after fulfilment costs, returns, and discounts?" With all revenue and cost data consolidated in Business Central, this becomes a standard report — by product, by channel, by season, by collection.
Faster, more accurate purchasing decisions
Buying the right quantities of the right products is the critical discipline in fashion. With Shopify sales history, current stock levels, and forward wholesale orders all visible in TRIMIT's purchasing tools alongside Business Central financials, buyers can make data-driven decisions rather than relying on gut feel.
Scale without adding administrative headcount
The manual overhead of managing disconnected systems grows with the business. Every new product, channel, or market you add increases the administrative burden. An integrated stack grows with you — adding a new Shopify market, a new retail location, or a new wholesale customer doesn't require a new set of manual processes.
| Capability | Shopify alone | Shopify + BC + TRIMIT + Seams |
|---|---|---|
| Real-time inventory across all channels | Limited | ✓ Full — synced by Seams in real time |
| Fashion variant matrix (colour/size/season) | Basic | ✓ Native in TRIMIT, synced to Shopify |
| Financial management & general ledger | None (requires Xero/MYOB with integration) | ✓ Built into Business Central |
| Wholesale / B2B ordering portal | Requires separate app | ✓ Included in TRIMIT |
| Purchase order management | None | ✓ Full supplier PO management in BC |
| Season & collection planning | None | ✓ Native in TRIMIT |
| Shopify POS unified with back-office | Shopify only, siloed | ✓ Fully integrated to BC by Seams |
| 3PL / warehouse management integration | Third-party app required | ✓ Native in Business Central |
| Margin reporting by product/channel | Manual export to spreadsheet | ✓ Real-time in Business Central |
| Local Australian implementation & support | Shopify support only | ✓ Seams team — Melbourne-based |
9. Who is this right for?
The Shopify + Business Central + TRIMIT stack is best suited to fashion and apparel businesses experiencing growth and complexity that their current systems can't keep pace with. You're likely a good fit if:
- You're turning over $2M+ annually and growing
- You operate across multiple channels — online, wholesale, and/or physical retail
- You manage a complex product range with multiple variants, colours, and sizes
- You import product from overseas suppliers
- You have a team managing operations who can't afford errors from manual processes
- You're currently using Shopify with Xero, MYOB, or spreadsheets as your back-office
- You want a local partner who understands fashion, not just technology
It's equally relevant whether you're already on Shopify and want to upgrade your back-office, or whether you're evaluating Shopify as your commerce platform and want to ensure it connects properly to enterprise ERP from day one.
10. What implementation looks like with Seams
Implementing an ERP integration is a significant project. It requires planning, process mapping, data migration, and user training. But with Seams, it's a well-defined process with a clear path — and you're working with a team that has done this many times for businesses just like yours.
Phase 1: Discovery and scoping
We begin with a structured discovery process — mapping your current workflows, understanding your data structure, identifying Shopify integration points, and agreeing on scope.
Phase 2: Configuration and build
Business Central and TRIMIT are configured to your requirements — chart of accounts, product hierarchy, seasonal structure, pricing rules, warehouse locations, and more. The Shopify integration is configured and thoroughly tested in a staging environment before any go-live activity.
Phase 3: Data migration
Your existing data — customers, products, stock on hand, open orders, supplier records — can be migrated from your current systems into Business Central. Seams reviews and cleans data quality as part of this process, so you go live with clean, accurate records.
Phase 4: Training and go-live
Your team is trained on Business Central and TRIMIT before go-live. We provide a managed cutover to the integrated Shopify + Business Central + TRIMIT platform.
Phase 5: Ongoing support and growth
Seams provides ongoing support, system updates, and continuous improvement services post go-live. As your business evolves — new Shopify markets, new retail locations, new product categories — the platform and our team evolve with you.
11. Next steps
If you're a fashion or apparel brand running Shopify and you recognise yourself in the challenges described above, the most valuable thing you can do right now is have a conversation with our team.
We offer a no-obligation, 30-minute discovery call where we'll listen to your current situation, share relevant examples from similar businesses, and give you an honest assessment of whether the Shopify + Business Central + TRIMIT stack is the right fit — and what it would realistically look like for you.
Ready to connect your full stack?
Book a free 30-minute call with the Seams team. We'll walk through your current Shopify setup and show you what Shopify + Business Central + TRIMIT looks like for your business.
Request a Free Demo explore seamsfashionerp.com.au