The possibility that future solid polymer fuel cell vehicles will be fuelled by methanal has been suggested. if this is the case, it will have significant implications for the future structure of the methanol supply industry, and methanal supply and availability may have an impact on the lake-up of these SPFC vehicles. In this study, a model assessing the possible future penetration of methanal SPFC vehicles was constructed. This suggested that it would be possible for SPFC vehicles to achieve rapid market: penetration after an initially slow start. A further model indicated that methanol supply would be adequate Ear vehicle demand until about 2013, when significant new capacity would be required. The cost of this new capacity was estimated, along with the cost of providing refuelling infrastructure such as road tankers, storage, and suitable fuelling stations. Amortising the cost over a short period (to 2013) could double the pre-tax price of methanol as a fuel, while over a longer timeframe (to 2029) it would add less than 10% to this value. The model suggests that methanol capacity need not be a constraint to the future introduction of SPFC vehicles using it as a fuel, but; that other factors such as fuel purity and safety must be carefully considered before real costs can be calculated.