If you manufacture anything in Australia, you're holding material you won't use. That isn't bad planning. Minimum order quantities, cancelled programmes and reformulations are ordinary conditions of the job.
The question is what to do with it, and the honest answer is that it depends less on what the material is than on what paperwork came with it and how long it has left.
I've used four of the five over the years, and got it wrong more than once. Here they are, what each realistically pays, and how to tell which one you're eligible for.
How much material actually goes to waste in Australia?
More than most people in the industry would guess. A 2013 study by Encycle Consulting for the Australian Government, still published by the environment department, put the cost of material inputs later disposed of as waste at more than $26.5 billion a year, and noted explicitly that a proportion of it is avoidable. It is an old figure in 2013 dollars and no newer national estimate has replaced it, so treat it as an order of magnitude rather than a current number.
Not all of that's recoverable surplus, obviously. Building and demolition materials dominate the tonnage and have nothing to do with process inputs. But the hazardous category alone runs to 6.5 million tonnes, and a meaningful share of that's chemical stock that was fit for use at some point and stopped being tradeable before anyone found a buyer.
The NSW figures make the same point at a finer grain. Four material categories account for just over 70 per cent of what businesses send to landfill in that state, and organics and processing residues lead. Some of that was raw material somebody paid full price for.
What are the five channels, and what does each pay?
Every route for surplus material falls into one of five categories. They differ enormously in what they return, and the difference isn't really negotiable — it is structural.
| Channel | Typical return | Documentation needed | Best when |
|---|---|---|---|
| Internal redeployment | Full value | Your own records | Another line or site can use it before it dates |
| Peer marketplace | Close to replacement cost | Full batch documentation | Material is in date and the paperwork is intact |
| Broker | Partial, minus margin | Varies; often light | You need it gone and will trade value for speed |
| Liquidator | A fraction of cost | Rarely required | Short-dated, or documentation is incomplete |
| Licensed disposal | Negative — you pay | Waste classification | Genuinely no longer fit for its purpose |
The gap between the second row and the fourth is the whole argument of this article. Same drum, same manufacturer, same batch. The difference in what you recover comes down to whether a buyer's quality function can approve it from the information you can give them.
Which channel can you actually use?
This is more constrained than it looks. You don't really choose a channel. The condition of the material and its paperwork chooses one for you.
Two tests decide almost every case. Is the documentation intact, meaning original manufacturer, batch or lot number, Certificate of Analysis for that batch, and an evidenced storage history? And is there enough time left on the date for a buyer to qualify it, order it, freight it and actually use it?
Answer yes to both and you can sell into a peer market at close to what the material is worth. Answer no to either and you're looking at a broker, a liquidator, or a disposal invoice.
Why does documentation move the price so much?
Because the buyer isn't really buying the material. They're buying the right to put it into a regulated production run without re-testing it from scratch. That took me an embarrassingly long time to understand as a seller.
A receiving manufacturer operating under GMP, a food safety programme, or a therapeutic goods obligation has to evidence what went into their product. If your batch arrives with the manufacturer's Certificate of Analysis, a matching batch number and a clean storage history, their quality function can qualify it against their own specification and move on.
If the batch number on the paperwork doesn't match the batch number on the drum, the document proves nothing about the goods being sold.
Strip that away and the same material becomes a requalification project: inbound testing, a deviation to justify why an unqualified input is being used, and a delay while the lab turns it around. Most buyers will simply order new stock instead, and the ones who will take it want a liquidation price to cover the work.
This is also why holding on to surplus is more expensive than it looks. Documentation doesn't degrade, but dates do. A drum with eighteen months left is a tradeable asset. The same drum with six weeks left is a disposal cost with a delivery fee attached.
What to check before you list anything
Whichever channel you use, the preparation is the same, and doing it first is what keeps you in the higher-value routes. This is the list we work through before anything leaves our own warehouse.
- Find the original manufacturer's Certificate of Analysis and confirm the batch number on it matches the batch number physically on the goods.
- Confirm whether the date on the batch is an expiry date or a retest date. They aren't interchangeable, and material past a retest date is frequently still usable.
- Establish the storage history for the material's whole life, not just the period you held it. A date is only valid if the conditions were maintained.
- Record whether packaging is unopened with seals intact. A part-used container is a materially different proposition and pricing it as though it were not will cost you the buyer.
- Locate the Safety Data Sheet, and where the material is dangerous goods, the declared class. As consignor, classification is your duty under the ADG Code.
- Photograph the labels, including the batch number. It's the cheapest possible evidence and it answers the first question every buyer asks.
If any of that's missing, find out now rather than after a buyer has committed. An enquiry that stalls because the paperwork can't be produced costs you the sale and the buyer's next enquiry too.
Where does Surply fit?
Being direct about this: Surply is our own marketplace, so treat what follows accordingly. It occupies the second row of the table — a peer market for documented material, between manufacturers rather than through a broker.
Members trade under a checked ABN and a real production address, and pure resellers and liquidators are declined. Every listing carries its documents attached rather than available on request. Sellers pay a success fee on a completed deal and buyers pay nothing, and we never hold the money for the goods — that stays directly between the two businesses.
It isn't the right channel for everything. If your material is short-dated, if the documentation has a gap in it, or if you need it gone this week regardless of price, a broker or liquidator will serve you better and there's no point pretending otherwise. The peer route is slower because qualification takes time. It pays more for the same reason. Where the line sits between the two is a judgement call, and I don't think anyone gets it right every time.
Common questions
- Can I sell surplus raw material that's past its retest date?
- Often, yes. A retest date is a checkpoint rather than a terminal date: the material is tested against its original specification and can be released again if it still conforms. That differs from a true expiry date. The receiving manufacturer's quality function makes the call under its own obligations, and the storage history matters as much as the date.
- What is surplus raw material worth compared with new stock?
- With documentation intact and useful time left on the date, close to replacement cost less the buyer's cost of qualifying it. Without documentation, or with only weeks remaining, it falls to liquidation pricing — a fraction of what was paid. The material is identical in both cases; the evidence is what differs.
- Do I need a Safety Data Sheet to sell surplus chemicals?
- In practice, yes. Australian work health and safety regulations require manufacturers and importers of hazardous chemicals to prepare a Safety Data Sheet and provide it to anyone who receives the chemical. Buyers also need it to assess handling and freight. Where material is dangerous goods, the seller is consignor and carries classification duty under the ADG Code.
- Is it better to sell surplus or write it off for tax?
- That is a question for your accountant, and it depends on your circumstances. What is worth weighing is that a write-off recovers nothing while storage keeps costing, whereas a sale recovers cash and clears the space. Holding material until it dates generally produces the worst outcome of the three.
- How quickly does surplus material need to move?
- Faster than most holders assume. A buyer needs time to qualify the batch, raise a purchase order, arrange freight and schedule it into a run. Material with several months remaining is genuinely tradeable; material with a few weeks left is realistically a liquidation or disposal decision, whatever its condition.
Sources and references
- DCCEEW — National Waste and Resource Recovery Report 2024 (2022–23 data)
- Encycle Consulting for the Australian Government (2013) — A study into commercial and industrial waste and recycling in Australia by industry division. Source of the $26.5bn figure; note the vintage
- NSW EPA — Commercial and industrial waste audit 2023
- Australian Business Register — ABN Lookup