AdBlue and DEF Prices in 2026: How the Urea Squeeze Reaches Trucks

What is AdBlue and why does it need urea?

AdBlue is the trade name for diesel exhaust fluid (DEF), a solution of 32.5% high-purity urea in deionised water ^[1]. Diesel engines with selective catalytic reduction (SCR) inject it into the exhaust, where it breaks nitrogen oxides into nitrogen and water. Without it, modern trucks lose power or will not restart, so it is not optional.

Consumption is significant. On Euro 5 and Euro 6 tractors, AdBlue use equals about 4–6% of diesel volume, or roughly 1.3–1.7 litres per 100 km for a truck burning 30 litres of diesel per 100 km ^[2]. The coming Euro 7 standard is expected to raise use by a further 5–15%, depending on duty cycle ^[2].

The urea in AdBlue must be technical grade, with fewer impurities than fertiliser urea. But both come from the same ammonia plants and the same natural gas, so fertiliser market shocks feed directly into AdBlue costs.

How much do urea prices move AdBlue prices?

By weight, each tonne of AdBlue contains 325 kg of urea ^[1]. AdBlue weighs about 1.09 kg a litre, so a litre holds roughly 0.35 kg of urea (our calculation). A $100 a tonne rise in urea therefore adds roughly 3.5 US cents a litre to raw-material cost, before purification, water, packaging, transport and margins.

That sounds small, but urea moved by far more than $100 in 2026. The World Bank's monthly urea price rose from $472 a tonne in February to $856.9 in April, before easing to $420 in October ^[3]. In early April, Argus data cited by Mansfield Energy showed US bulk DEF prices up roughly 15–20 cents a gallon across major markets, as NOLA urea climbed above $700 a short ton from the $400s ^[1].

Gas is the second driver. European AdBlue makers rely on domestic urea produced from natural gas. TrucksOnTheMap notes that Dutch TTF gas roughly doubled from about €30 to over €60/MWh in early March 2026 and that carriers without indexed contracts reported AdBlue price rises of 30–60% within six weeks ^[2]. TTF has since risen further, to €86.80/MWh in early November after trading above €100 ^[4].

What do European hauliers pay?

TrucksOnTheMap puts 2026 AdBlue prices at €0.65–0.90 a litre in 1,000-litre IBC containers and €0.90–1.20 a litre at the pump, compared with about €0.30–0.40 before 2022 ^[2]. For a fleet of 25 trucks each driving 110,000 km a year, that means about 41,250 litres of AdBlue and €37,125–49,500 a year, depending on how it is bought ^[2].

Relative to diesel, the bill is modest. The EU average retail diesel price was €2.146 a litre in the week of 26 October ^[5]. At 5% of diesel volume, AdBlue adds roughly 2–3% to a truck's fuel-related spend at current prices (our calculation). The bigger risk is availability, not price.

The industry has warned about this before. In April, the International Road Transport Union (IRU) reported that its German member BGL warned of AdBlue price rises of up to 170%, and noted that no EU or national emergency stockpiling had been announced ^[6]. In the 2022 gas crisis, AdBlue rose from about €0.35 to over €2.00 a litre ^[6].

Which countries are most exposed?

Those that import technical urea or AdBlue from a few suppliers.

Australia. About 60% of Australia's urea historically passed through the Strait of Hormuz ^[7]. In March, IBTimes Australia reported that the federal strategic reserve held about 7,500 tonnes of technical-grade urea equivalent, roughly five weeks of normal demand, against annual AdBlue use of around 150 million litres ^[8]. The government formed a working group with the fertiliser industry in April ^[7], and in May announced a strategic reserve of nearly 90,000 tonnes of agricultural urea, with eight more vessels carrying 248,000 tonnes at sea ^[9]. Domestic supply should improve when the Perdaman urea plant in Western Australia starts production, expected from mid-2027 ^[7].

South Korea. Korea learned the risk in 2021, when Chinese export curbs caused a nationwide shortage of vehicle urea solution. Before 2021 China supplied 80–90% of Korea's urea; despite subsidies for other suppliers and a larger public reserve, China's share was still 62.4% in January–September 2025 ^[10]. In April 2026, the government said it would release public reserves of urea and urea solution at the end of the month ^[11].

United States. North America is better placed. Mansfield Energy describes US DEF supply as stable thanks to strong domestic urea production and limited reliance on Middle East imports, although prices still follow global urea ^[1].

China sits at the centre of this market, because it is a major supplier of technical urea to Asia and controls exports through inspections and quotas ^[12].

What can fleets do?

Practical options for fleet managers include:

• Buying in bulk. TrucksOnTheMap estimates bulk storage saves €12,000–16,000 a year for a 25-truck fleet compared with pump-only buying ^[2].
• Indexing contracts to a urea or AdBlue benchmark, rather than accepting sudden supplier increases ^[2].
• Holding stock ahead of seasonal peaks, within the storage limits that suppliers set for the product.
• Diversifying suppliers, especially where one country dominates imports ^[10].

What to watch

• Urea prices, especially NOLA and European granular, which feed AdBlue costs with a short lag ^[1,3].
• European gas prices, which set the cost of local AdBlue production ^[2,4].
• China's export policy for technical urea ^[10,12].
• Hormuz shipping, which decides Gulf urea availability for Australia and Asia ^[7].

Alupetra follows diesel, gas and urea markets from Istanbul, London and Dubai; Alupetra does not deal with sanctioned parties.