Catalytic converter recycling is the six-step process that turns a spent converter's platinum (Pt, 78), palladium (Pd, 46) and rhodium (Rh, 45) into refined metal, physico-chemically identical to newly mined metal, according to the World Platinum Investment Council (WPIC). Global platinum recycling supply alone reached 1,679 thousand troy ounces (koz) in 2025, of which 1,241 koz came from autocatalysts, per WPIC's Platinum Quarterly Q1 2026 (18 May 2026). What each step does, which metals actually come back, how much of the metal fitted to a car is ever recovered, who captures the value along the way and what drives the payout are covered below.
What Is Catalytic Converter Recycling?#
Catalytic converter recycling is the recovery of PGM from a spent autocatalyst through de-canning, crushing, smelting and chemical refining, described by WPIC as a six-step chain in its Platinum Essentials report of August 2025. The output is not a lesser substitute for mined metal: refined PGM from recycled feedstock has the same physico-chemical properties as freshly mined platinum, palladium and rhodium and moves interchangeably into the same end markets, WPIC states. Converter recycling is one stream that feeds scrap platinum, palladium and rhodium more broadly, alongside jewelry and industrial catalyst scrap.
The Six-Step Recycling Chain#
The chain runs scrapyard, aggregator, decanner, sampler/processor, smelter, refiner, six named actors, each adding one step of value, per WPIC's Platinum Essentials (August 2025). The table below sets out what each actor does to the converter before it reaches its next owner.
| Step | Actor | Activity |
|---|---|---|
| 1 | Scrapyard | Strips the end-of-life vehicle into parts, including the spent autocatalyst |
| 2 | Aggregator | Collects converters, sorts by metallic or ceramic honeycomb, assays to price the unit for the scrapyard |
| 3 | Decanner | Strips the outer metallic housing to access the PGM-bearing substrate |
| 4 | Sampler / processor | Crushes the substrate into a fine, consistent powder and assays it to price the lot for the aggregator |
| 5 | Smelter | Smelts the crushed feed above 1,200°C, often with hydrometallurgical leaching, to concentrate the metal |
| 6 | Refiner | Separates and purifies the PGM chemically into sponge or salts, ready for resale |
Every one of the six actors above touches only one link in the chain, and no single firm typically spans all six.
De-Canning: Separating Steel from the PGM-Bearing Substrate#
De-canning is "stripped of its outer metallic housing to access the PGM-containing honeycomb substrate," WPIC states in Platinum Essentials (August 2025), after which the steel shell is sold as a separate scrap stream with no PGM value of its own. The substrate that remains, a cordierite ceramic or metallic honeycomb coated with the active platinum, palladium and rhodium, is the only part that carries metal value from this point on. Aggregators sort converters into metallic and ceramic categories before de-canning because the two substrate types are milled and priced differently downstream, on the catalytic converter ceramic monolith that carries the coated washcoat.
Crushing, Sampling and Smelting#
Crushed substrate is smelted above 1,200°C to separate metallic from non-metallic material, "often done in conjunction with" hydrometallurgical leaching to raise recovery, per WPIC's Platinum Essentials. Before smelting, the de-canned substrate is crushed and aggregated into a fine, consistent powder, then sampled and assayed a second time to set the value the aggregator is paid, distinct from the first assay done at the scrapyard. The pyrometallurgical step, high-temperature smelting, separates the metal-bearing fraction from ceramic and other non-metallic material, and the hydrometallurgical step, chemical leaching, draws the individual PGMs into solution to concentrate them further.
Refining: From Crushed Substrate to Sponge or Salts#
Refining is "the chemical separation process of removing final impurities and converting the incoming PGMs into their final product forms, be it sponge or salts," through solvent extraction, evaporation, precipitation and filtration, WPIC states. Sponge is the porous metallic form refiners sell to industrial buyers such as catalyst and jewelry manufacturers, while salts, PGM compounds in solution or crystalline form, feed chemical and electronics uses. This is the final step in the chain, and its output is what re-enters the market as newly refined platinum, palladium or rhodium, indistinguishable from mined metal once assayed, priced against the same catalytic converter assay that set its value further up the chain.
Which Metals Actually Come Back#
Only three of the six platinum group metals are recovered from converters: platinum, palladium and rhodium. Ruthenium, iridium and osmium play no meaningful role in the autocatalyst and are not part of the recycling economics described below.
Platinum, Palladium and Rhodium#
Platinum and palladium handle oxidation reactions in a converter, while rhodium performs NOx reduction, a function no other metal in the converter performs as well, according to SFA (Oxford) and Johnson Matthey's PGM Market Report (May 2026). Rhodium's role makes it the most converter-dependent of the three: 100% of its reported open-loop secondary supply comes from autocatalysts, since Johnson Matthey publishes no non-automotive rhodium recycling line at all, and that stream alone was 312 koz of the metal's 1,013 koz combined 2025 supply. Palladium is close behind: automotive recycling supplied 2,657 koz of palladium in 2025 against 1,132 koz for platinum, on Johnson Matthey's basis, because gasoline three-way catalysts run palladium-dominant chemistry. Content and grading by converter type are covered on how much platinum, palladium and rhodium is in a catalytic converter.
Why Ruthenium, Iridium and Osmium Are Not Recovered#
Ruthenium, iridium and osmium are not present in autocatalysts in meaningful quantity, and Johnson Matthey's ruthenium and iridium supply tables carry no secondary-supply line at all, only primary supply, demand and stock movements. SFA (Oxford)'s 2026 PGM fact sheets confirm the same picture metal by metal: ruthenium demand is chemical, electrical and decorative rather than automotive; iridium appears only in trace, specialty uses such as some spark plug tips, not the catalyst itself; and osmium is treated as an impurity in refining circuits rather than a recoverable stream. A buyer will not pay a converter seller for these three metals because the converter simply does not contain them in a recoverable form.
How Much Metal Is Recovered#
Technical PGM recovery from a converter is "well over 95% when using the correct process," WPIC states, of pyrometallurgical and hydrometallurgical methods combined. That high technical ceiling, however, is not the same number as how much of a car's original PGM ever reaches a refiner, covered in the recovery factor below.
Technical Recovery Rates#
WPIC's own model assumes 2.0% processing loss through smelting and refining, and a cumulative 3-5% loss from de-canning onward, once earlier handling steps are included. The two figures are not contradictory: 2.0% is the modelled smelting and refining loss alone, while 3-5% is the cumulative loss across de-canning, smelting and refining together.
| Loss stage | Magnitude |
|---|---|
| Smelting and refining (modelled) | 2.0% |
| Cumulative, de-canning through refining | 3% to 5% |
The Recovery Factor: the Gap Between Fitted and Refined#
Only roughly 55-60% of the PGM fitted to a car when it was built is ever recovered as refined secondary metal, once loss-in-use, vehicle exports, missing catalysts and processing losses are netted against the 15% added by aftermarket replacements, a 40-45% cumulative deduction WPIC applies to its scrappage-curve model in Platinum Essentials (August 2025). The 55-60% figure is a computed complement of that stated 40-45% net deduction, not a number WPIC prints directly. Loss in use, wear on the substrate over the catalyst's operating life, costs about 5% of recoveries; roughly a quarter of scrapped vehicles are exported to regions without formal recycling infrastructure before they can be recovered at all; a quarter of scrapped vehicles never had an attached catalyst to begin with; and processing losses of 3-5% apply on top. Aftermarket replacement converters partly offset the loss, adding back about 15% of volume. WPIC validates the overall model by back-checking it against 30 years of actual recycled supply, finding actual supply has run at 98% of what the scrappage curve implies since 1995.
| Adjustment | Direction | Magnitude |
|---|---|---|
| Loss in use | Negative | ~5% of recoveries |
| Vehicle exports | Negative | ~25% of vehicles |
| Catalyst attachment | Negative | Only 75% of scrapped vehicles have one |
| Recovery losses | Negative | 3% to 5% |
| Aftermarket additions | Positive | ~15% |
| Net adjustment | Negative | 40% to 45% |
Who Does the Recycling#
Converter recycling is structurally split: "the upstream segments of recycling are fragmented with many market participants, while smelting and refining is concentrated amongst fewer firms," WPIC states in Platinum Essentials. That split shapes who captures the value at each step, covered next.
Fragmented Upstream, Concentrated Downstream#
The consolidated refining tier names Johnson Matthey, Umicore and BASF among its largest firms, while Sibanye-Stillwater operates a smelting-only autocatalyst business rather than full refining, per WPIC. Upstream, by contrast, thousands of scrapyards and aggregators operate with almost no public financial reporting, which is why market participants routinely underestimate how exposed converter recycling actually is to the PGM price cycle.
Where the Margin Sits#
Refiners pay the aggregator between 90% and 95% of the value of the contained PGMs (WPIC models 92.5%) and hedge their own output, earning a stable spread while the aggregator and scrapyard absorb the price cycle. Around 90% of a refiner's input cost is the purchase of recycled feedstock itself, already linked to market prices, so a refiner's margin is a controllable spread between what it pays aggregators and what it sells refined metal for, not a bet on the PGM price. The aggregator, by contrast, carries real processing costs before it ever sells to a refiner: WPIC puts these at US$90 to US$200 per catalyst depending on geography, covering logistics, sampling, de-canning and financing the lag between purchase and settlement. That is why the scrapyard's own offer, the residual after the aggregator's costs are covered, is the part of the chain most exposed to a falling PGM price.
Catalytic Converter Recycling Prices#
Total platinum recycling supply was 1,679 koz in 2025, of which 1,241 koz (74%) came from autocatalysts, per WPIC's Platinum Quarterly Q1 2026 (18 May 2026). That volume sets the scale of the market behind catalytic converter scrap prices, while the price a scrapyard is actually offered for a single converter is a separate question, covered in turn below.
How Much PGM Recycling Supplies Each Year#
Johnson Matthey reports 2025 automotive secondary supply of 2,657 koz palladium and 312 koz rhodium, against platinum's 1,132 koz, in its PGM Market Report (May 2026), a series that uses different definitional boundaries from WPIC's platinum-only figures below and is never mixed with them in one calculation. WPIC's own platinum series, covering total recycling rather than automotive alone, is shown by year in the table below.
| Year | Total recycling (koz) | Autocatalyst recycling (koz) |
|---|---|---|
| 2022 | 1,811 | 1,370 |
| 2023 | 1,515 | 1,114 |
| 2024 | 1,536 | 1,163 |
| 2025 | 1,679 | 1,241 |
| 2026f | 1,826 | 1,365 |
WPIC Platinum Quarterly Q1 2026 (18 May 2026); 2026 is WPIC's forecast, not an outturn. How this recycled volume sizes up against total platinum supply is set out on secondary platinum supply as a share of supply.
Recycling Payouts Track the PGM Price, Not a Fixed Rate#
Recycling economics track the PGM price directly: WPIC's modelled break-even offer to a scrapyard swung from negative US$6 per catalyst in 2024 to positive US$19 by mid-2025 as platinum and palladium prices rose, on a 30 June 2025 spot basis. That swing happened without any change in how a converter is processed: the same six-step chain, the same aggregator cost stack and the same 90-95% refiner payable applied throughout, so the entire movement in the scrapyard's offer came from the price of the contained metal itself.
| Period | Price basis | Modelled break-even to scrapyard |
|---|---|---|
| 2024 average | Full-year average PGM prices | -US$6 per catalyst |
| Mid-2025 | 30 June 2025 spot prices | +US$19 per catalyst |
There is no fixed dollar figure for "what a catalytic converter is worth"; the payout is a live function of the platinum, palladium and rhodium price on the day of the quote, which is why sellers should treat any flat number as a starting estimate rather than a rate card.
======== CONTEXTUAL BORDER ========
Recycling Structure and Emerging Categories#
Converters move through both large national refiners and local recycling centers, not one channel, and a small but distinct scrap category sits alongside the converter itself.
National Refiners vs Local Recycling Centers#
A local recycling center collects and grades converters before selling them on to a consolidated refining tier such as Johnson Matthey, Umicore or BASF, rather than refining the metal itself. Sellers weighing a local center's offer against a national buyer's are comparing two different links in the same six-step chain, a comparison covered in full on catalytic converter buyers and recyclers.
Oxygen Sensor Scrap Value#
Oxygen sensors carry a small platinum electrode on a zirconia ceramic element, a far smaller PGM quantity than a converter's substrate, and WPIC classes sensor demand under "Other" industrial, not automotive, demand. The sensor's platinum sits as a porous electrode on a yttria-stabilised zirconia (YSZ) solid electrolyte, a design built for measuring exhaust oxygen rather than for bulk metal recovery, and WPIC's "Other" industrial category that includes sensors totalled 600 koz of platinum demand in 2025. No published per-sensor payout figure exists for this category at the depth available for converters, so sellers should expect a sensor to add only marginal value alongside a converter, not a payout of its own scale.
Recycle a Converter#
Recycling a converter starts with an identification and a quote, not a drop-off.
Get a Recycling Quote#
A recycling quote is priced against metal content and current PGM prices, the same two variables that set every figure in this article.
Related Converter Scrap Guides#
Related guides cover valuation, selling and buyer comparison, each answering a narrower question than this page.
- How much is a catalytic converter worth by type and vehicle
- Most valuable catalytic converters and why PGM loadings differ
- Catalytic converter grades and how buyers grade scrap converters
- Diesel catalytic converter scrap value and DPF units
- Aftermarket vs OEM catalytic converter identification and value gap
Recycling FAQ#
Is it worth it to scrap a catalytic converter?#
It depends on the price cycle: WPIC's modelled break-even to the scrapyard was negative in 2024 and positive by mid-2025, so "worth it" is a moving target, not a fixed answer. A converter that was barely worth collecting at 2024 prices can clear a real profit for the scrapyard once platinum, palladium and rhodium prices rise, and the reverse is equally true when prices fall.
Do you need a title to scrap a catalytic converter?#
Many US states now require scrap buyers to record the seller's identity and the vehicle's VIN before accepting a converter, a response to the rise in converter theft. Requirements vary by state, and the full state-by-state picture, including where a title or proof of ownership is required, is covered on where to sell a catalytic converter.
What metal is worth money in a catalytic converter?#
Platinum, palladium and rhodium are the three metals with resale value in a converter; the ceramic, steel and washcoat carry none. Rhodium is typically the highest-value metal per gram of the three, but palladium's larger quantity in most gasoline converters usually makes it the largest single contributor to a converter's total value.