Carbon Tax on Farmers: Canada, EU, Denmark and US Rules

A carbon tax on farmers is rare. The US has no federal carbon tax on agriculture, and Canada set its federal fuel charge to zero on April 1, 2025 (Canada Gazette, SOR/2025-107). Denmark is the one country with a dated farm emissions tax, on livestock from 2030. For most farmers in North America, Europe and Australia, carbon pricing arrives indirectly: through fertilizer prices, the EU’s border carbon charge on imported fertilizer, and payment rules.

This guide is dated October 2026. It covers what each carbon tax agriculture rule means in practice: Canada’s fuel charge history, the EU Emissions Trading System and its border mechanism (CBAM), Denmark’s livestock tax and the US position. It ends with a calculator that puts a carbon price on your own nitrogen use, and a checklist of practices that cut both cost and emissions. Tax rules change often, so check current local rules and get professional tax advice before you act on any figure here.

What a carbon tax on agriculture would actually price

A carbon tax puts a price on each tonne of greenhouse gas released. On a farm the gases are nitrous oxide (N2O) from fertilized soil, methane (CH4) from cattle digestion and manure, and carbon dioxide (CO2) from diesel, heating fuel, lime and urea. Each is converted into tonnes of CO2-equivalent (CO2e) so they can be added up and priced.

The US figures show where a farm-level price would land. In 2022, direct emissions from agriculture were 9.4% of total US greenhouse gas emissions, according to the EPA’s agriculture sector emissions page. The EPA splits that share by source:

• Agricultural soil management (fertilizer, manure on soil, nitrogen-fixing crops): just over half of sector emissions.
• Enteric fermentation (methane from ruminant digestion): over a quarter.
• Manure management (stored manure): about 14%.
• Other sources (rice, liming, urea, residue burning): the rest.

The EPA also notes that soil management activities were the largest source of US nitrous oxide in 2022, at 75% of total N2O emissions. That is why nitrogen rates sit at the centre of almost every farm carbon debate. A tax that priced farm emissions directly would land first on fertilizer decisions and on livestock numbers.

In practice, governments have mostly avoided pricing those biological emissions. They are hard to measure field by field, they vary with weather and soil, and food prices are politically sensitive. Instead, carbon prices have reached farms through fuel, through the factories that make fertilizer, and through border charges on imports. The sections below go jurisdiction by jurisdiction.

Chart

Sources of US agricultural emissions

Share of farm-sector greenhouse gas emissions, 2022, as EPA rounds them: just over half, over a quarter, about 14%

Carbon tax on farmers by country: a dated summary

The table below summarises the position as of October 2026. Each row is explained in its own section further down.

The pattern is clear. Only Denmark taxes farm emissions at the farm gate, and not until 2030. Everywhere else the cost runs through inputs or appears as a payment for doing something, not a bill for emitting.

Canada’s fuel charge: the history farmers lived through

Canada’s federal fuel charge started in 2019 in provinces without their own system. The benchmark price began at CA$20 per tonne of CO2e in 2019 and rose by CA$10 a year to CA$50 in 2022, then by CA$15 a year, reaching CA$80 per tonne in April 2024, as set out in the per-tonne price schedule of the Greenhouse Gas Pollution Pricing Act (Schedule 4). The same schedule rose to CA$170 per tonne in 2030.

Chart

Canada’s federal carbon price on fuel

CA$ per tonne CO2e, benchmark rate by year; set to zero from April 1, 2025

Farmers were partly shielded from the start. Gasoline and light fuel oil used in eligible farm machinery were exempt when the farmer gave the fuel seller an exemption certificate. The large gap was heating. Natural gas and propane used to dry grain or heat barns and greenhouses were charged, with only partial relief for commercial greenhouses.

That gap drove Bill C-234. As passed by the House of Commons in March 2023, the bill would have extended the farm fuel exemption to marketable natural gas and propane, and widened “eligible farming machinery” to include grain dryers and equipment that heats or cools buildings used for livestock or crops (Parliament of Canada, Bill C-234 third reading text). The House version also included an eight-year sunset on the wider exemption. The Senate amended the bill, and the debate was overtaken by events.

On March 15, 2025 the government registered regulations that set every fuel-charge rate to zero from April 1, 2025 (SOR/2025-107). Since then, Canadian farmers pay no federal carbon charge on fuel. Two things did not change. Industrial carbon pricing for large emitters, which covers fertilizer plants, stays in place. And the Greenhouse Gas Pollution Pricing Act still exists, so a future government could set rates above zero again without a new law.

For a Canadian farm, the practical lesson is record keeping. If the charge ever returns, the farms that kept fuel-use records by purpose (machinery, drying, heating) will be the ones that can claim exemptions or rebates quickly.

EU ETS and CBAM: the carbon price inside fertilizer

The EU Emissions Trading System (ETS) does not cover farms. It does cover fertilizer plants, because making ammonia from natural gas releases large amounts of CO2. Those plants must hold an allowance for each tonne they emit, and the cost can flow into the price farmers pay for nitrogen.

To stop imports from undercutting EU producers, the EU added the Carbon Border Adjustment Mechanism (CBAM). It applies to imports of cement, iron and steel, aluminium, fertilisers, electricity and hydrogen. After a reporting-only phase from 2023 to 2025, CBAM entered its definitive regime on January 1, 2026, which means importers must buy and surrender certificates for the embedded emissions of the goods they bring in (European Commission, CBAM).

The certificate price tracks EU ETS auction prices. The Commission publishes a quarterly price for 2026: €75.36 for the first quarter, €75.28 for the second and €82.32 for the third (European Commission, price of CBAM certificates). From February 2027 all certificates will be bought on a central platform.

For a European farmer this is the closest thing to a carbon tax on inputs. The farmer does not file anything. The importer or the EU producer pays, and the cost shows up in the price of urea, ammonium nitrate and other nitrogen products. How much of it is passed on depends on the market, so treat any per-tonne estimate you see quoted with care and ask your supplier how their prices are built.

UK readers should note that the UK runs its own emissions trading scheme and has announced its own border mechanism. Australia and New Zealand do not price farm emissions directly. Check your national rules before assuming the EU figures apply to you.

Chart

EU CBAM certificate price in 2026

€ per tonne CO2e embedded in imported goods, including fertilisers, by quarter

Denmark’s livestock tax: the first real farm-gate carbon tax

Denmark is the clearest case of a direct agriculture carbon tax. The government announced the plan on June 24, 2024 as part of a wider agreement with farm and environmental groups. Agriculture produces about a quarter of Denmark’s greenhouse gas emissions, according to Carbon Brief’s Q&A on the Danish plan.

The headline rate is higher than what farmers will pay. After a 60% basic deduction, the effective cost is 120 Danish kroner (about $18) per tonne of CO2e from 2030, rising to 300 kroner (about $44) per tonne from 2035, Carbon Brief reports. Farmers can also get financial incentives from a new fund for voluntary steps such as setting aside carbon-rich lowland soils and cutting nitrogen emissions.

The deal also includes land-use changes: 250,000 hectares of new forest by 2045 and 140,000 hectares of carbon-rich lowland soils taken out of farming by 2030. Denmark aims to cut total emissions 70% by 2030.

Why does this matter outside Denmark? It is the first working model of how to price livestock methane at the farm level, including how to set a deduction so the tax does not simply move production abroad. Other governments, and the buyers who supply European retailers, are watching how it performs.

▶ The costs and benefits of mixing crops and livestock on one farm. · 2:55

The US position: no carbon tax, but credits and fertilizer costs

There is no federal carbon tax or federal cap-and-trade covering US farms as of October 2026. The pressure on US farm emissions comes from three other places.

State fuel programs. California’s Low Carbon Fuel Standard lets dairy digester projects that capture manure methane generate credits that can be sold. The farm is paid for a reduction rather than taxed for emissions.

Voluntary carbon markets. Private buyers pay for practices such as cover crops and reduced tillage. Prices and contract terms vary widely, and the University of Wisconsin crops and soils overview of agricultural carbon credits is a useful starting point before you sign a contract. Credit details are covered in more depth in our separate carbon-credit guides.

Fertilizer prices. This is the cost that matters most for a US grain farm. DTN’s retail survey for the last week of September 2026 put anhydrous ammonia at $979 per ton, urea at $683 and UAN32 at $483, with anhydrous 20% and urea 12% higher than a year earlier (DTN fertilizer survey, October 2026). These are average retail prices from dealer bids, not contract or wholesale prices.

A year earlier, farmdoc daily’s analysis of fertilizer decisions for the 2026 crop year already flagged rising nitrogen prices in August 2025. Every pound of nitrogen the crop does not use is both money lost and a source of N2O. So even without a tax, cutting surplus nitrogen is the lowest-risk carbon decision a US farmer can make.

Chart

US retail fertilizer prices, late September 2026

Average retail price, $ per ton, dealer bids collected by DTN

Carbon tax and farmers: who actually pays today

Put the pieces together and the answer to “do farmers pay a carbon tax?” depends on where you farm and what you buy.

• US farmers: no carbon tax. Indirect cost through world fertilizer prices. Possible credit income in California and voluntary markets.
• Canadian farmers: no fuel charge since April 1, 2025. Industrial carbon pricing can still be built into Canadian-made fertilizer.
• EU farmers: no farm-level tax, except Denmark from 2030. ETS and CBAM costs are built into nitrogen prices. CAP eco-schemes pay for climate-friendly practices.
• Danish livestock farmers: a direct levy from 2030, after a 60% deduction.
• UK, Australian and New Zealand farmers: no direct farm emissions tax at the time of writing; check national schemes.

Use these four questions to check your own exposure, wherever you farm:

1. Is a farm-level greenhouse gas levy in force where you farm now, or scheduled with a date?
2. Is a carbon price already built into your inputs, mainly nitrogen fertilizer and heating fuel?
3. Do you qualify for an exemption certificate or rebate, and are your fuel records good enough to claim it?
4. Are you leaving payment on the table from eco-schemes, state programs or credit contracts for practices you already use?

This is general information, not tax or legal advice. Rules and rates change; confirm the current position with your tax adviser, farm organisation or national tax authority.

Put a carbon price on your nitrogen

The calculator below shows what a carbon price would mean for the nitrogen you apply, and how that compares with the fertilizer cost of trimming your rate. It uses the IPCC Tier 1 default that 1% of applied nitrogen is emitted as N2O-N, and a global warming potential of 265 for N2O. The defaults are round example numbers, not benchmarks or forecasts. Enter your own rate, acres, nitrogen price and any carbon price you want to test, such as Denmark’s effective 2035 rate or the 2026 CBAM certificate price converted to dollars.

Try the numbers for your own farm below.

How to read the result: the carbon cost line is what the N2O from your nitrogen would cost if it were taxed at the price you enter. The saving line is the fertilizer money you keep if you trim your rate by the amount you enter. If the saving is close to or above the carbon cost, trimming surplus nitrogen pays for itself whether or not a tax ever arrives. If your yield would fall, the saving is not real, so test any rate cut on strips first and talk to your agronomist.

The calculator leaves out indirect N2O from leaching and volatilization, emissions from making the fertilizer, diesel, and manure nitrogen. A certified farm greenhouse gas inventory will give a fuller number. Use this one for a quick sense of scale.

Low-carbon farming practices that cut cost too

The practices below map onto the EPA emission sources described earlier. They are useful whether or not a carbon tax ever reaches your farm, because most also cut an input bill or earn a payment.

1. Precision nutrient management

Variable-rate nitrogen, split applications and soil testing reduce surplus nitrogen. This targets the largest source of farm emissions, soil management, and the largest input cost on most grain farms. Best for: corn, wheat and canola growers with fields that vary in yield.

2. Manure management and digesters

Covering lagoons, separating solids and anaerobic digestion cut methane from stored manure, the source behind about 14% of US farm emissions. In California, digester projects can sell fuel-standard credits. Best for: larger dairy and hog operations near a gas or power connection.

3. Livestock feed and herd management

Feed additives that reduce methane, better feed efficiency and fewer unproductive animals target enteric fermentation, over a quarter of US farm emissions. This is the source Denmark’s 2030 tax is built around. Best for: beef and dairy producers selling into supply chains with climate targets.

4. Cover crops and reduced tillage

Living roots and less soil disturbance can build soil carbon and reduce erosion. These practices are the basis of most farm carbon-credit contracts and many eco-schemes. Best for: farms with a workable window after harvest and a buyer or program that pays for the practice.

5. Agroforestry and buffer strips

Trees and shrubs on field edges store carbon above and below ground. The EU lists agroforestry and carbon farming among the practices eco-schemes can support (European Commission, eco-schemes). Best for: mixed farms with low-yield corners or wet field margins.

6. On-farm energy and fuel efficiency

Solar for pumps and barns, efficient grain drying and better route planning for machinery cut fuel use. In Canada this was the cost line most exposed to the fuel charge before 2025. Best for: farms with high drying, irrigation or heating loads.

7. Records and verification

None of the above earns a rebate, credit or eco-scheme payment without records that hold up. Field boundaries, application dates, rates and crop condition through the season are the minimum most programs ask for. Best for: every farm planning to claim payment for a practice.

▶ An overview of carbon farming practices such as cover crops and reduced tillage that store carbon in soil. · 5:30

What to watch next

Carbon rules for farms move slowly, then suddenly. These are the dated events worth putting in a farm diary.

• EU, January 2027: the Commission publishes the fourth-quarter 2026 CBAM price, and from February 2027 certificates are sold on a central platform. Watch nitrogen import prices in early 2027.
• EU, 2028: the next CAP period begins after 2027. The size and shape of eco-schemes after 2027 will decide how much farmers are paid for low-carbon practices.
• Canada: the fuel-charge law is still on the books with rates at zero. Any change would need new regulations, which are published in the Canada Gazette first.
• Denmark, 2030: the livestock levy starts. Its measurement rules, deductions and how farmers respond will shape debates elsewhere.
• United States: no federal proposal is moving. State fuel standards and voluntary markets remain the places where farm carbon has a price.

For greenhouse growers in Canada, the history is a useful reminder. Heating fuel was the cost line most exposed to the fuel charge, and the relief that existed was partial. If carbon pricing on fuel returns in any form, greenhouse and grain-drying operations should expect to be among the first to feel it and should keep fuel records by use now.

How satellite field data supports carbon reporting

Whether a carbon tax reaches your farm or not, the paperwork pressure is growing: credit buyers, eco-schemes and food companies all ask for field-level evidence. The Farmonaut Satellite + AI Farm Monitoring System shows vegetation maps for each field through the season, which helps place nitrogen by zone and keeps a dated record of crop condition. It does not measure emissions directly; it supports the records that programs ask for.

Developers and larger operations can pull the underlying satellite and weather data through the Farmonaut API.

Related pages on our site: carbon footprinting, product traceability, fleet management, API developer docs, farm economics guide, and the app on web, Android and iOS.

▶ How satellite vegetation maps show crop condition across a large farm. · 4:09

How we checked the numbers

Every rate, price and share in this guide comes from a named source, and each is dated. Canadian fuel-charge rates come from the Canada Gazette and the parliamentary record, with the yearly price path from the Act’s own schedule. EU figures come from the European Commission’s own CBAM and eco-scheme pages. Danish figures come from Carbon Brief’s reporting of the government’s agreement. US emission shares come from the EPA, and fertilizer prices from DTN’s weekly retail survey, which reports average dealer prices rather than contract prices. Exchange-rate conversions are the source’s own.

FAQ

Is there a carbon tax on agriculture in the United States?

No. As of October 2026 there is no federal carbon tax or cap-and-trade covering US farms. California’s Low Carbon Fuel Standard pays credits to some dairy digester projects, but it does not tax farm emissions.

What happened to Canada’s carbon tax for farmers?

The federal fuel charge, which applied from 2019 with exemptions for farm machinery fuel, was set to zero for all fuels from April 1, 2025 under SOR/2025-107. Industrial carbon pricing for large emitters, including fertilizer plants, continues.

Which country taxes agricultural emissions?

Denmark. Its livestock tax starts in 2030 at an effective 120 kroner (about $18) per tonne of CO2e after a 60% deduction, rising to 300 kroner (about $44) from 2035.

How does CBAM affect fertilizer prices for EU farmers?

Since January 1, 2026, importers of fertilizer into the EU must buy CBAM certificates for embedded emissions. The 2026 certificate price was €75.36 in the first quarter and €82.32 in the third. Part of that cost can be passed on in nitrogen prices.

Can farmers be paid instead of taxed?

Yes, in several places. EU eco-schemes reserve 25% of direct payments for climate and environment practices in 2023 to 2027, California pays credits for digesters, and voluntary markets pay for practices such as cover crops. Read contract terms carefully and get advice before signing.