You bought well. You sold at a margin that looked healthy. But between purchase and sale, that cargo sat — in a warehouse, in a yard, on a wharf — for weeks longer than planned. Nobody tracked what that wait actually cost you. And the margin you thought you made quietly shrank underneath you.
The Gap Between Landing and Selling Is Where Margin Goes to Die
In a trading business, there’s a window between the moment you take ownership of goods and the moment you get paid for them. Inside that window, costs accumulate. Storage fees. Insurance on goods in transit or at rest. Interest on the working capital tied up in stock you haven’t moved yet. Opportunity cost — the next deal you couldn’t fund because your cash was locked in product sitting idle. Most trading owners track purchase price and sale price. The spread looks fine. But nobody accounts for the cost of duration. A deal that closes in twelve days and a deal that closes in forty-five days are not the same deal, even if the buy and sell prices are identical. Without a holding cost model, you genuinely cannot tell the difference. And that’s a problem, because your slower deals are subsidised by your faster ones — and you’ll never see it in the P&L.
Your Accounting Doesn’t Separate Time From Transaction
Standard bookkeeping captures what you bought and what you sold. It does not capture how long you held it or what that holding period cost. Your accountant records warehouse invoices as a lump overhead line. Interest is allocated across the business, not against specific trades. Insurance premiums cover everything in aggregate. So when you review a deal after the fact, all you see is the gross margin. The carrying cost is buried in overheads that are never traced back to the trade that caused them. This means you could be running deals that look profitable on paper but actually destroy value once you factor in the time your capital was trapped. A part-time CFO Perth engagement built around trading businesses structures the data so every deal carries its own burden — storage, finance cost, insurance — allocated by duration and value.
Holding Cost Changes Which Deals You Should Chase
Once you can see the true cost of holding inventory across each trade, your decision-making shifts. You start declining deals where the expected holding period eats the margin, even if the spread looks attractive. You start negotiating harder on storage terms or looking at different warehousing arrangements for slower-moving lines. You renegotiate payment terms with buyers — not just to speed up cash collection, but because you now know precisely what each extra week costs you. A trading business CFO Perth role isn’t just about reporting what happened. It’s about building a cost framework that changes what you say yes to. The owner who understands their cost per day of holding a specific commodity in a specific location makes sharper decisions than the one running on gut feel and gross margin.
Building a Holding Cost Model That Actually Works
At 360 Fox, when we work with Perth trading businesses, one of the first things we build is a per-trade holding cost model. It’s not complicated, but it requires discipline. We assign a daily finance cost based on the capital deployed in each trade. We allocate storage and insurance by volume, value and duration. We track the actual number of days between ownership transfer in and cash received out. Then we restate each trade’s margin after carrying costs. The results surprise people. Deals that looked like winners turn out marginal. Deals that seemed ordinary turn out to be the best in the book because they moved fast. This is where a part-time CFO Perth adds value that no bookkeeper or accountant will — not because they can’t do the maths, but because they’re not asking the question. We ask it because we’ve seen what happens when nobody does.
Your trading margin isn’t set when you buy or when you sell. It’s set by everything that happens in between. If you’re not measuring that, you’re guessing. And the guess is almost always too generous.
Want eyes on your numbers before the next big decision? 360 Fox is a boutique CFO practice for owner-led businesses in logistics, importing, warehousing, distribution, manufacturing and trading. Book a chat.