London — One of the most consequential shifts in the palladium market is not happening inside mines or refineries, but under the hood of gasoline-powered vehicles. Since 2022, automakers have been systematically substituting platinum for palladium in gasoline three-way catalytic converters — and the scale of that substitution has become a defining force in reshaping the PGM supply-demand balance.
Industry estimates compiled by the World Platinum Investment Council indicate that approximately 500,000 to 600,000 ounces of palladium were displaced by platinum annually during 2023 and 2024 — equivalent to roughly 5–6% of annual global palladium demand. This substitution wave, triggered by the unprecedented palladium price premium over platinum that emerged in 2019, has now become deeply embedded in automakers' catalyst designs.
📌 Key Takeaway
- 500,000–600,000 oz/yr of palladium displaced by platinum in gasoline catalysts (2023–2024)
- Substitution surged 80% in 2022 (360,000 oz) and another 50% in 2023 (540,000 oz)
- Platinum traded at an avg premium of $59/oz over palladium in late 2025 — potentially slowing new substitution
- Heraeus and WPIC both identify substitution as a key driver of palladium's shift to surplus
- Euro 7 and China's next-stage emissions standards could lock in higher platinum loadings
The Substitution Timeline: How We Got Here
The platinum-palladium substitution dynamic is cyclical, driven primarily by relative pricing. During the 2000s, a significant decline in fuel sulphur content allowed the substitution ratio between palladium and platinum in gasoline autocatalysts to shift from 2:1 to essentially 1:1, making direct metal-for-metal replacement technically feasible in most formulations.
Between 2019 and 2022, palladium prices soared to parity and then far beyond platinum, trading above $3,000/oz while platinum languished below $1,000/oz. This created an enormous economic incentive for automakers to engineer palladium out of their catalyst systems and replace it with the far cheaper platinum.
| Year | Pd Displaced by Pt (oz) | YoY Change | Pt-Pd Price Spread |
|---|---|---|---|
| 2021 | ~200,000 | — | Pd premium ~$1,500/oz |
| 2022 | 360,000 | +80% | Pd premium ~$1,000/oz |
| 2023 | 540,000 | +50% | Pd premium ~$600/oz |
| 2024 | 500,000–600,000 (est.) | Stable | Spread narrowing |
| 2025–2026 | Slowing* | — | Pt premium ~$59/oz (late 2025) |
* The pace of new substitution has slowed as the platinum-palladium price spread has narrowed or reversed. Sources: WPIC, Johnson Matthey, Auronum Research.
Why Substitution Matters Now More Than Ever
The substitution wave has had a dual impact on the palladium market. First, it has directly reduced palladium demand by hundreds of thousands of ounces annually — demand that is unlikely to return even if the price relationship reverses. Once an automaker re-engineers a catalyst platform for platinum, reversing that design carries significant engineering and certification costs.
Second, the substitution has permanently altered the competitive dynamics between the two metals. Platinum has claimed a larger share of the gasoline catalyst market that it is unlikely to cede, creating a structural reduction in palladium's addressable market even before BEV adoption is factored in.
Key insight from WPIC: "An estimated 500–600 koz/yr of platinum has displaced palladium in gasoline three-way catalysts during 2023–2024. WPIC's base case models some of this substitution reversing as the platinum–palladium price spread narrows, but the changes already made continue to support demand from carmakers."
The Spread Reversal: Will Substitution Reverse?
By late 2025, a remarkable shift had occurred: platinum was trading at an average premium of approximately $59/oz over palladium, according to the WPIC. This premium reversal — the first sustained period of platinum costing more than palladium in years — theoretically reduces the incentive for further substitution. Some analysts, including those at the WPIC, have modeled a partial reversal of the substitution trend as the spread narrows.
However, several factors argue against a rapid or complete reversal:
- Engineering inertia: Once a production line is tooled for a platinum-dominant formulation, switching back requires recertification that can take 12–18 months.
- Platinum supply tightness: With platinum recording a 317,000 oz deficit in 2026 and above-ground stocks below five months of forward demand coverage, sustained cheap platinum availability is not guaranteed.
- Emissions regulation: Coming Euro 7 (November 2026) and China's next-stage standards both increase catalyst PGM loading per vehicle, and designs optimised for platinum may persist through these regulatory cycles.
Heraeus Warns of Widening Surplus
Heraeus Precious Metals has been among the most bearish voices on palladium, projecting that the surplus could widen as BEVs gain market share and substitution persists. Henrik Marx, Head of Trading at Heraeus, stated that "palladium may face a widening surplus as battery electric vehicles gain market share," with a 2026 price range of $950–$1,500/oz — implying significant downside from current levels near $1,500.
The WPIC takes a slightly more nuanced view, projecting small palladium deficits for 2025 that transition into small surpluses in 2026, consistent with Johnson Matthey's findings. But crucially, the WPIC emphasises that the entire surplus projection "is entirely contingent on recycling supply growth" — and that substitution dynamics remain a key swing factor.
Outlook: A Structural Shift, Not a Cyclical Blip
The platinum-for-palladium substitution trend represents a structural reconfiguration of the gasoline autocatalyst market that has permanently reduced palladium's demand base by roughly half a million ounces per year. Combined with the accelerating BEV transition and growing recycling volumes, this creates a demand picture for palladium that is fundamentally weaker than at any point in the last decade.
For investors and industrial buyers navigating the PGM complex, the key question is no longer whether palladium will move into surplus — Johnson Matthey has answered that — but whether the surplus will prove to be a brief interlude or the start of a prolonged period of oversupply as the BEV transition and platinum substitution structurally erode the metal's demand profile.
Sources: World Platinum Investment Council, Johnson Matthey PGM Market Report (May 2026), Heraeus Precious Metals, Auronum Research, Investing News Network.