Overview: This guide covers the whole of catalytic converter recycling and selling in the UK in one place: what is inside a converter and why it holds value, what sets the scrap price, the law that governs every sale, the paperwork a private seller and a business each need, how professional valuation actually works, and how collection and bulk supply are arranged. Written for garages, dismantlers, fleet operators, scrap yards and individual sellers across the UK and Ireland.
A catalytic converter is an emissions-control device fitted into a vehicle’s exhaust system. Inside the steel canister sits a ceramic or metallic honeycomb, and that honeycomb carries a thin coating of three platinum-group metals: platinum, palladium and rhodium. Those three metals do the chemistry, and those three metals are the entire reason a used unit is worth money rather than costing money to dispose of.
The chemistry matters to a seller for one specific reason. The metals act as catalysts, which means they enable reactions without being consumed by them. A converter that has been on a car for twelve years and 140,000 miles still holds the platinum, palladium and rhodium it left the factory with. It may no longer work – the substrate may be cracked, the coating may be poisoned or sintered – but the metal has not gone anywhere. That is why a failed unit is a recoverable asset and not waste.
A typical passenger-car unit contains roughly 3 to 7 grams of platinum-group metals in total. Diesel units tend to lean towards platinum; petrol units lean towards palladium and rhodium. Heavy-duty and hybrid units often carry more, because they have to meet emissions limits under harder conditions. Aftermarket and universal replacements sit at the bottom of the range, because they are built to the legal minimum at the lowest cost.
The commercial logic becomes obvious once you compare concentrations. A 2025 review in Resources, Conservation and Recycling reports that platinum-group elements in natural deposits generally run below 10 grams per tonne, while spent automotive catalysts contain 1,000 to 3,000 grams per tonne – about a hundred times more. The same review notes that spent catalysts have become the principal source of platinum-group metal supply, and that automotive exhaust purification remains the largest single application of these metals worldwide.
Put plainly: the part sitting under a car in a workshop yard is a richer source of platinum than most of the rock being dug out of the ground for it. That is the whole basis of the recycling market, and it is why licensed buyers pay real money for a component that looks like a rusted steel box.
Any UK catalytic converter recycling guide has to start with who is actually selling. The material reaches the market from five main sources: MOT garages and exhaust specialists replacing failed units, vehicle dismantlers stripping end-of-life vehicles, fleet operators working through scheduled maintenance, scrap yards handling whole cars, and private owners who have had a converter replaced and kept the old one.
What these sellers have in common is that the converter is a by-product. Nobody buys a converter in order to sell it. It arrives as a consequence of work already being done, which means the sourcing cost is effectively zero and the only real decision is where it goes next. That decision is worth more than most sellers assume.
A converter sold into mixed scrap is valued as steel – a few pounds at most. The same unit sold to a specialist is valued on the platinum, palladium and rhodium it contains, which is typically two to three orders of magnitude more. The gap between those two outcomes is the single largest avoidable loss in this market, and it happens purely because the unit went into the wrong pile.
If you want the underlying environmental argument for why this material deserves a dedicated stream rather than the general skip, Blancomet’s article on the environmental impact of catalytic converters sets it out for UK readers.
There is no fixed catalytic converter scrap price, and any buyer quoting a flat per-piece rate before seeing the unit is guessing – usually in their own favour. The figure moves daily, because it tracks the market price of three separately traded metals.
Most UK units scrap for somewhere between £50 and £400. Rare premium units, typically from certain BMW, Land Rover and Porsche models, can exceed £500. But those are ranges, not quotes. Five factors decide where a specific unit lands within them.
| Factor | Effect on the price |
|---|---|
| Platinum, palladium and rhodium market prices | The largest single driver, and it moves every day |
| Make, model and OEM code | Specific codes signal known, higher metal loadings |
| Converter type (petrol, diesel, ceramic, metallic, DPF) | Sets the ratio between the three metals |
| Age and condition of the honeycomb | Cracked, melted or emptied units lose 60 to 90 per cent of value |
| Supply, demand and emissions regulation | Tighter rules raise metal demand and lift scrap values |
Source: Blancomet Recycling, catalytic converter recycling service (2026).
Rhodium is the reason converter prices can move sharply. It is the scarcest of the three metals and the one with the narrowest supply base, and it has traded anywhere from roughly £1,000 to over £20,000 per troy ounce within the past five years. A unit with a high rhodium loading is therefore exposed to far more price movement than one that is mostly platinum.
Recycling supply responds to those prices. The World Platinum Investment Council describes recycling as price elastic: after a 10 per cent year-on-year rise in 2025, platinum-group metal recycling supply was forecast to grow another 10 per cent in 2026 as stronger prices released spent autocatalysts that had been held back during earlier price troughs. For a seller, that is a useful piece of context – material tends to come out of storage when prices are good, which is exactly when a buyer is able to pay well for it.
Two converters can come off the same production line, look identical from the outside, and carry different metal loadings because they were specified for different engines, markets or emissions standards. Appearance tells you almost nothing. The serial or part number stamped on the casing tells you a great deal. This is why Blancomet’s guide on where to sell scrap catalytic converters in the UK without guesswork puts identification before valuation rather than after it.
Understanding how to sell catalytic converters legally UK-wide comes down to one piece of legislation and a handful of practical obligations that follow from it.
Under the Scrap Metal Dealers Act 2013, no person may carry on business as a scrap metal dealer without a licence issued by the local authority, and trading without one is a criminal offence. The Act provides for two licence types: a site licence covering identified premises, and a collector’s licence for mobile collectors. Before you hand over material, it is entirely reasonable to ask which licence the buyer holds and which authority issued it.
The same Act bans cash payment for scrap metal. A licensed dealer must pay by bank transfer or by a cheque that cannot be transferred. This is not a policy preference or a company rule – it is the law, and it applies to catalytic converters exactly as it applies to copper or lead. A buyer offering cash in 2026 is committing an offence, and a seller accepting it has no record of a lawful transaction if the unit’s provenance is later questioned.
Dealers are required to verify and record who they buy from. In practice that means photo identification – a driving licence or passport – plus proof of address dated within the last three months. For a converter removed from your own vehicle, the V5 log book is strongly advisable, because it connects the part to a vehicle you can demonstrate you own.
None of this is obstruction. It is the mechanism that separates a legitimate market from a fencing operation, and it is what allows a licensed buyer to pay full value with confidence. Blancomet’s tips on selling your catalytic converter cover the practical side of preparing for that conversation.
Catalytic converter recycling documentation differs depending on whether you are selling as an individual or as a business, and the business side is where most sellers underestimate what is required.
You need photo identification, proof of address within three months, and ideally the V5 for the vehicle the converter came from. That is the whole list. The dealer completes their own records; your obligation is to be who you say you are and to be able to show the part is lawfully yours.
A business moving converters off its own site takes on additional duties. Any business that transports, buys, sells or disposes of waste must register with the Environment Agency as a waste carrier, broker or dealer. Registration is free if you only move waste you produce yourself; otherwise it currently costs £191.02, upper-tier registrations must be renewed every three years, and registered organisations appear on a public register that anyone can search. Operating unregistered carries an unlimited fine. Registration in Scotland, Wales and Northern Ireland is handled by the equivalent national bodies.
Spent converters are typically handled as hazardous waste, which brings a further requirement: a consignment note must accompany the material from the point it leaves your premises until it reaches its final destination, with each party completing the part that applies to their role – producer, carrier, consignor or consignee. For non-hazardous loads, a waste transfer note serves the same function, and both sides must keep a copy.
Duty of care is not discharged by handing material to whoever turns up with a van. If waste you produced is later found fly-tipped or mishandled, the records showing you passed it to an authorised person are your defence. A buyer who issues proper consignment notes as a matter of routine is, in documentation terms, doing part of your compliance work for you.
Catalytic converter recycling for businesses is less about finding material and more about not losing it. The stock generates itself. What separates a business earning meaningfully from this stream from one earning almost nothing is process discipline, and it comes down to four habits.
Keep units intact. A converter that has been cut open or had the honeycomb knocked out is worth a fraction of the same unit whole. It also looks exactly like a stolen unit that has been stripped, which makes a licensed buyer’s job harder.
Keep them separate from mixed scrap. Once a converter is in the general steel skip, it is being sold as steel. The separation costs nothing and is the single highest-return action in the whole process.
Record where each one came from. A vehicle registration, job number or VIN against each unit takes seconds and makes provenance provable. It also makes it far easier to reconcile a settlement against what you actually sent.
Batch rather than sell ad hoc. A documented batch is easier to value accurately than a succession of single units arriving without context, and it changes which commercial route is available to you.
Bulk catalytic converter recycling is a materially different commercial arrangement, not simply the same transaction repeated. Broadly, UK sellers meet two routes.
| Spot purchase | Toll refining | |
|---|---|---|
| Best for | One-off sales and small batches | Regular high-volume supply under contract |
| How it is valued | Unit identified against a converter database, price agreed directly | Lot de-canned, ground and homogenised, then assayed for exact metal content |
| Payment | Same day by bank transfer once the price is agreed | Within a few working days of completed analysis |
| Best suited to | Private sellers, small garages | Dismantlers, fleets, scrap yards with steady volume |
Source: Blancomet Recycling – purchasing routes, 2026.
The important distinction is what the price is based on. A spot purchase values the unit by identification and reference data. Toll refining values the lot by measurement. For a seller with consistent volume, measurement removes the estimation margin entirely, which is usually where the difference in returns sits.
Professional catalytic converter valuation is a sequence, and knowing the sequence tells you what questions to ask a buyer.
1
The serial or part number stamped on the casing is matched against a converter database, giving a reference metal loading before anything is opened.
2
The steel casing is opened and the ceramic or metallic substrate is removed.
3
The substrate is milled to a powder and mixed, so that any sample taken represents the whole lot rather than one part of it.
4
A representative sample is analysed by ICP-OES to measure the exact platinum, palladium and rhodium content.
5
The figure is calculated from measured metal content against prevailing market prices, not from an estimate of what that unit type usually holds.
A spot purchase stops at step 1 and values the unit by identification. Toll refining runs the full chain and pays on measured content – which is why high-volume sellers use it.
Source: Blancomet Recycling – catalytic converter valuation process, 2026.
The serial or part number is stamped, engraved or printed on the casing, usually on the outer shell or a small welded plate. Surface rust can hide it; a wire brush or steel wool clears it. That code is matched against a database of known units, which gives a reference loading before anything is cut open. Sending the code ahead of time means you arrive with an indicative figure rather than a surprise.
The steel casing is opened and the ceramic or metallic substrate removed. The substrate is milled to a powder and homogenised, because the metal coating is not evenly distributed through the honeycomb. Without homogenising, a sample taken from one part of the material would not represent the lot, and the assay would be meaningless.
A representative sample is analysed – commonly by ICP-OES, inductively coupled plasma optical emission spectrometry – to measure platinum, palladium and rhodium content directly. The settlement figure is then calculated from measured content against prevailing metal prices, rather than from an estimate of what a unit of that type usually contains.
Blancomet’s walkthrough of the scrap catalytic converter recycling process from unit to refinery follows the same chain in more detail, including what happens to the recovered metal afterwards.
Catalytic converter collection UK arrangements generally scale with volume, and distance is rarely the obstacle sellers expect it to be.
A single unit can be dropped at a branch or posted by insured courier – insured matters, because the declared value is not the value of a steel box. Small batches work the same way. From around ten units upwards, free UK-wide collection is commonly available, and trade suppliers with predictable volume are usually moved onto a scheduled collection cycle so material is not sitting in a yard accumulating risk.
Blancomet operates six branches across the UK and Ireland – Stone in Staffordshire, St Albans in Hertfordshire, Leeds, Dunfermline in Fife, Gateshead, and Dublin – and arranges collection beyond those catchments. If you are weighing up local options first, the guide to catalytic converter buyers near me and what sellers should check sets out what to verify before committing material to anyone.
Most of the value lost in this market is lost to a small number of repeated errors. A practical scrap catalyst selling guide is therefore mostly a list of things not to do.
Do not cut the unit open. Sellers sometimes assume the honeycomb alone is worth more without the casing. It is not worth handling separately, it is worth less to a buyer who now cannot identify the unit, and it makes the material look stripped.
Do not accept a price quoted before identification. A number offered over the phone with no code and no sight of the unit is a bid on the seller’s uncertainty.
Do not accept cash. It is unlawful, and it leaves you with nothing showing the sale took place.
Do not let units accumulate loose in a yard. They are a theft target in storage as much as on a vehicle, and unrecorded stock is difficult to prove ownership of.
Do not judge value by size. A compact unit from a high-loading model can be worth more than a large unit from a low-loading one. Volume of steel is not volume of metal.
Converters leave service for a limited set of reasons, and knowing which one applies helps you set expectations before selling.
Age and thermal ageing account for the largest share – the coating gradually sinters and loses active surface area, and a unit that has done roughly a decade or 100,000 miles is approaching that point. Overheating from a misfiring engine can melt the substrate outright. Contamination from burnt oil or coolant poisons the coating. Physical damage from road debris or a failed exhaust mount cracks the honeycomb. Theft removes the unit entirely.
Crucially, none of these destroys the precious metal. A melted substrate still holds its platinum, palladium and rhodium; recovery just becomes a harder process. The one exception is a unit that has been emptied – once the honeycomb is gone, so is the value. Blancomet’s article on why a catalytic converter becomes scrap goes through each failure mode in turn.
Converter theft shaped the UK market and still shapes the paperwork. Units sit underneath the vehicle, can be cut out in minutes without breaking into the car, and contain metals that at points have been worth more per gram than gold.
The picture improved substantially. The National Police Chiefs’ Council reported that UK thefts peaked in March 2021 at 3,245 recorded in a single month, then fell to 1,378 by that July – a drop of 57 per cent – which police credited largely to forensic marking making stolen units harder to dispose of, alongside a national asset database allowing recovered units to be traced to a vehicle.
For owners, the police advice is consistent: fit a manufacturer-approved lock or guard tested to Sold Secure Gold, mark the unit with a forensic marker and register it, and park in well-lit, overlooked places or close to a wall so the underside cannot be reached. For sellers, the relevance is simpler – the legitimate market now expects provenance, and a seller who can show where a unit came from is at no disadvantage whatsoever.
Every gram of platinum, palladium or rhodium recovered from a spent unit is a gram that does not have to be mined. Given that primary extraction of these metals is among the more land-, water- and energy-intensive mining activities, and that reserves are concentrated in a small number of regions, secondary supply is not a nice-to-have. It is a structural part of how these metals reach industry at all.
97%
of mined platinum, palladium and rhodium produced in 2023 came from just four regions
Below 10 g/t
Typical platinum group metal grade in natural mineral deposits
1,000 – 3,000 g/t
Typical platinum group metal content of a spent automotive catalyst
About 100 times more concentrated than the rock it came from
The UK has no primary platinum group metal mining. Every converter recycled here is domestic supply that did not have to be imported or extracted.
Source: Xv, B. et al., “Recovery of platinum group metals from spent automotive catalysts”, Resources, Conservation and Recycling, 215 (2025) 108103.
That is also why regulators treat the material the way they do. Spent catalysts are classified as hazardous waste in many jurisdictions precisely because they contain heavy metals and must not simply be landfilled – and because the recoverable content is too valuable to throw away. Blancomet’s piece on how recycling catalytic converters cuts precious metal mining takes the comparison further.
Yes, for longer than the headlines imply, and for two reasons.
The first is hybrids. A hybrid runs an internal combustion engine and therefore still needs emissions control – and because hybrid engines run cooler and intermittently, their converters often carry higher metal loadings than a comparable petrol unit. Every hybrid on the road today is a converter that will eventually reach recovery.
The second is the installed fleet. Tens of millions of vehicles with converters are already on UK roads, and the average car stays in service well over a decade. Even on an aggressive electrification timeline, units keep flowing into recovery through the 2030s. Meanwhile the demand side does not soften: tightening emissions standards push manufacturers towards more capable catalysts, and platinum has growing non-automotive uses in hydrogen technologies.
Selling a converter well in the UK is not complicated, but it is specific. Identify the unit by its code rather than its appearance. Sell only to a dealer licensed under the Scrap Metal Dealers Act 2013, and expect to be paid by bank transfer, never cash. Have your identification and, where relevant, your waste carrier registration and consignment notes in order before the material moves. Keep units whole, keep them separate, and keep a record of where each one came from.
Do those things and the price you are offered reflects what is actually inside the unit. Skip them and you are selling a steel box.
To get a unit identified or arrange collection for a batch, contact the Blancomet catalytic converter recycling team. Blancomet has bought converters from garages, dismantlers, fleets and private sellers since 2009, across six branches in the UK and Ireland, with every lot documented and every settlement based on measured metal content.
How much is a catalytic converter worth as scrap in the UK?
Most UK units scrap for between £50 and £400, and rare premium units from certain BMW, Land Rover and Porsche models can exceed £500. The figure depends on the OEM code, the metal loading, the condition of the honeycomb, and the prices of platinum, palladium and rhodium on the day. An accurate quote requires the unit to be identified by its serial number rather than judged on appearance or size.
Is it legal to sell a catalytic converter for cash in the UK?
No. Under the Scrap Metal Dealers Act 2013 it is an offence for a scrap metal dealer to pay cash for any scrap metal, including catalytic converters. Licensed dealers must pay by bank transfer or by a non-transferable cheque, and must verify and record the seller’s identity. A buyer offering cash is breaking the law, and a seller accepting it has no record that a lawful sale took place.
What documents do I need to sell a catalytic converter?
As a private seller you need photo identification such as a driving licence or passport, plus proof of address dated within the last three months. The V5 log book is strongly recommended because it shows the converter came from a vehicle you own. Businesses moving converters off site also need waste carrier registration and, for hazardous loads, a completed consignment note accompanying the material.
Do I need to register as a waste carrier to sell converters from my garage?
If your business transports, buys, sells or disposes of waste, you must register with the Environment Agency in England, or with the equivalent body in Scotland, Wales or Northern Ireland. Registration is free if you only move waste you produce yourself. Otherwise it currently costs £191.02, upper-tier registrations are renewed every three years, and operating without registration risks an unlimited fine.
Why is the catalytic converter scrap price not fixed?
Because it tracks three separately traded metals whose prices move daily. Rhodium is the most volatile of the three, having ranged from roughly £1,000 to over £20,000 per troy ounce within five years. A converter’s value is the sum of its measured platinum, palladium and rhodium content priced at that day’s market, which is why no published list can substitute for identification and assay.
How is a converter actually valued by a professional buyer?
First the unit is identified by the serial or part number stamped on its casing and matched against a converter database. For bulk lots it is then de-canned, the substrate is milled to powder and homogenised, and a representative sample is assayed – commonly by ICP-OES – to measure exact platinum, palladium and rhodium content. Settlement is calculated from that measured content against prevailing metal prices.
Should I remove the honeycomb before selling?
No. Cutting a converter open reduces what a licensed buyer will pay, because the unit can no longer be identified reliably and a stripped unit raises questions about provenance. Keep the converter whole, clear any rust obscuring the serial number, and let the buyer handle de-canning as part of the recycling process.
Do you collect converters, or do I have to deliver them?
Both routes exist. Single units and small batches can be dropped at a branch or posted by insured courier. From around ten units upwards, free UK-wide collection is typically available, and trade suppliers with regular volume are usually moved onto a scheduled collection arrangement so material does not sit in storage.
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