What it means
Fossil fuels are also ancient biology, but biofuel comes from material that was alive recently, so the carbon released when it burns was pulled from the atmosphere only months or years earlier. That fast carbon cycle is the environmental case for biofuels.
The main commercial types are ethanol, fermented from sugar or starch crops and blended into gasoline, and biodiesel or renewable diesel, made from oils and fats for diesel engines. Newer advanced biofuels use non-food feedstocks such as agricultural residues and used cooking oil.
The economics depend heavily on policy. Blending mandates, tax credits, and low-carbon fuel standards create demand that pure price competition with oil often could not.
Production volumes respond to crop prices, oil prices, and the value of compliance credits, so biofuel margins swing with two commodity markets at once. This is why producers hedge both their feedstock and their fuel output, and why policy changes can make or break a plant's profitability overnight.
For managers, biofuels matter as both a market and a debate. Fuel suppliers, airlines, and shipping firms buy biofuels or credits to meet emissions rules, while food companies watch the food-versus-fuel tension when crops are diverted to energy.
Sustainability certification, feedstock traceability, and lifecycle emissions accounting increasingly decide which biofuels qualify for premiums. The sector rewards those who track policy as closely as they track commodity prices.
The industry sorts biofuels into generations that mark their sustainability and technology. First-generation fuels come from food crops such as corn, sugarcane, and vegetable oil, which makes them cheap but ties them to food markets.
Second-generation fuels use non-food biomass like crop residues, wood waste, and used cooking oil, easing the food-versus-fuel conflict at higher processing cost. Third-generation research targets algae and engineered microbes, promising high yields on marginal land.
Engines and infrastructure also set a blending wall: ordinary cars tolerate only modest ethanol blends, so demand depends on fleet composition as much as production.
In practice
Real-world examples.
Example
A fuel retailer sells E10 gasoline, where one-tenth of every litre is ethanol fermented from corn or sugarcane. Drivers notice no difference at the pump, while the retailer meets its blending obligation.
Example
An airline blends sustainable aviation fuel made from waste oils into its jet fuel to meet an emissions mandate on certain routes. The blend is certified against a sustainability standard so the airline can count it toward its mandated emissions reduction.
Example
A bus fleet switches to B20 biodiesel, a 20% biofuel blend, cutting its reported lifecycle emissions without replacing its vehicles. The fleet gains a marketing story as well as compliance, since corporate customers increasingly ask for low-emission transport.
Formula
Calculation
Blend percentage = volume of biofuel / total fuel volume x 100. E10 gasoline is 10% ethanol and 90% petroleum gasoline, the standard blend in many markets.
Worked example. A bus fleet buys 200,000 litres of B20, a blend of 20% biodiesel and 80% petroleum diesel, using invented prices of $1.10 per litre for biodiesel and $0.90 per litre for petroleum diesel.
- Biodiesel volume = 200,000 x 0.20 = 40,000 litres, and petroleum diesel volume = 200,000 x 0.80 = 160,000 litres.
- Blended price per litre = 0.20 x $1.10 + 0.80 x $0.90 = $0.22 + $0.72 = $0.94.
- Total cost = 200,000 x $0.94 = $188,000, compared with $180,000 for straight petroleum diesel, a premium of $8,000 for the lower lifecycle emissions.Case study
Seen in the real world.
This fictional, illustrative example follows Verdant Fuels, an invented biodiesel producer that bought used cooking oil from restaurant chains and sold renewable diesel to fleet operators. In its second year, a national low-carbon fuel standard doubled the value of compliance credits, transforming thin margins into strong profits. The next year a drought lifted feedstock prices 30%. Because Verdant had hedged half its oil purchases and held long-term supply contracts, it survived the squeeze while two unhedged rivals idled their plants, and it used the downturn to buy one of them cheaply.
Its next investment was a pre-treatment line able to accept cheaper, dirtier feedstocks, widening the margin cushion against the next price shock. Management later described the hedging policy, not the technology, as the real reason the company was still standing to make that acquisition. The company and its figures are invented.
Watch out
Common mistakes.
- Assuming biofuels are automatically carbon neutral, when lifecycle emissions from farming, processing, and transport still count and vary widely by feedstock.
- Ignoring policy dependence, since mandates and credits drive much of biofuel demand and can change faster than any commodity cycle.
- Overlooking the food-versus-fuel trade-off, where diverting crops or land to fuel production can raise food prices and trigger political backlash.
Questions
People also ask.
What are the main types of biofuel?
Ethanol blended into gasoline, biodiesel and renewable diesel from oils and fats, and advanced biofuels made from non-food feedstocks such as residues and waste oils.
Are biofuels better for the climate?
Usually, but not always. Their advantage depends on the feedstock and production method, since farming inputs, land-use change, and processing all add lifecycle emissions.
Why do biofuel companies watch government policy?
Blending mandates, tax credits, and low-carbon fuel standards create and price much of the demand, so policy shifts can change a plant's profitability overnight.
From the founder's library
Take it further with the book.
Build your financial confidence beyond this definition. Shihan's full-length guide, Accounting Fundamentals, takes the same plain-English approach and turns it into a complete, practical playbook for non-finance managers, business owners and students - with chapter-end quiz answers and presentation slides included.
25% off with code MMHQ25, applied at checkout. Priced in USD - checkout may show the equivalent in your local currency.
View the book and save 25%