If you make products and sell them online — sourcing your materials from a handful of different suppliers — you're almost certainly running two disconnected worlds: the storefront and the workshop. They don't talk, so you're guessing at stock, guessing at what things really cost, and guessing at what to buy. Connecting them is how you stop guessing. This is what that gets you, in plain terms.
Your online shop (Shopify) is brilliant at selling. It knows nothing about making your product, buying your materials, or what any of it costs. Connect it to an owned back-office system that does — and for the first time you get one honest view: real stock, the true cost and margin of every product, and a buying plan driven by what's actually selling. You keep renting the shopfront. You finally own the engine behind it.
Almost every maker-and-seller has the same split: the storefront takes the orders, and the workshop makes and ships them — with a person, a spreadsheet, and a lot of re-typing in between. That gap is where the money quietly leaks.
When the storefront and the back office share one set of numbers, four things you've been doing by feel become things you can actually see.
A sale online instantly lowers the stock figure in the back office — and that figure feeds back to the shop, so you stop selling things you don't have.
Because the system knows your recipe and what you really paid for materials, you finally see what each product costs to make — and what you made on every sale.
As sales draw materials down, the system flags what to reorder, from which supplier, and when — so you're neither out of stock nor sitting on dead cash.
Sales, cost of goods and supplier bills post themselves. Month-end stops being archaeology; you know where you stand more or less in real time.
Ask most makers "what's your margin on this product?" and the honest answer is a shrug and a guess. That's not carelessness — it's genuinely hard to know when you buy the same material from different suppliers at different prices. The connected system works it out for you.
Once it's real, the questions that used to be guesses get answers: which products to push, which to drop, where a supplier's price rise just quietly ate your profit, and whether that discount code is still making you money. This single number — true margin per product — is the whole reason to connect the two systems instead of running them apart.
This is the part that matters most when you source from several suppliers. The back office tracks every supplier for a material — their price, their lead time, their reliability — and turns your actual sales into the right order, to the right supplier, at the right moment.
When a material runs low — because the shop is selling — the system flags it for reorder. No more discovering you're out of a key part mid-build.
Ask several suppliers for a price on the same thing and see them side by side. Order from the best on price or speed for that run — not whoever you phoned last time.
Buy to match real demand instead of over-ordering "to be safe." Less money frozen in a storeroom, fewer stockouts — the balance you could never strike on a spreadsheet.
Over time you learn which supplier is actually cheapest and most reliable, from real records — leverage at your next price negotiation.
Picture your business as an iceberg. The front office — the Shopify storefront your customers see — is the tip above the waterline. It's genuinely excellent and a commodity worth renting; no need to leave it. The back office is the larger mass below: your recipes, your supplier relationships, your costs, your books — and where finance and the people who run things live. Put an open-source back office you own (ERPNext) there. No per-user licence, and your most valuable data — how you make things and what they cost — stays yours.
That's the principle running through every briefing in this series: rent the front office, own the back office. For a maker, your edge isn't the checkout page — it's the making and the buying below the surface. So that's the part to own.
This is a real system, not a plugin you flip on. The value scales with how much you make, how many suppliers you juggle, and how much you sell. Worth being straight about the cost.
The shop and the back office have to agree on what each item is. Getting your product codes straight first is the single biggest thing that makes it smooth.
Owned doesn't mean unmanaged. You'll either host it cheaply yourself or pay a small monthly fee, and have someone (in-house or a partner) look after it.
If you don't make anything, have one supplier and a few products, a spreadsheet is genuinely fine. The payoff comes from making and from supplier complexity.
Sync is quick but not instant. On a flash sale of a nearly-sold-out item, keep a small buffer so you don't briefly oversell.
Agree one code per item across the shop and the workshop. Boring, and the highest-leverage thing you'll do.
List what goes into each product and what you pay suppliers. This is what unlocks true cost and margin.
Link Shopify to the back office so orders flow in and stock flows out, automatically. No more re-typing.
Now you can see what really makes money. Push the winners, fix or drop the losers, and let buying follow sales.
Stop running the shop and the workshop as two worlds. Connect them, own the engine, and finally see the margin on everything you make.