Electric bus versus diesel bus cost over its lifetime
Electric bus versus diesel bus cost over its lifetime is usually assumed to favor the electric bus, once fuel and repair savings are added up. Most of the lifecycle studies collected for this article say the opposite, or say it only barely, because the price gap at purchase has kept growing instead of closing.
A diesel bus, 40 feet long, costs 410,000 to 500,000 dollars to buy in the United States, based on procurement contracts from around 2019 and 2020. A battery electric bus of the same length, one that runs on a large rechargeable battery instead of diesel fuel, costs 800,000 to 1.2 million dollars to buy today, after prices for electric and hydrogen fuel cell buses rose 26% between 2021 and 2023 alone. The gap between the 2 powertrains in that older contract data alone, calculated from those 2 numbers, already ran 250,000 to 300,000 dollars, and it has grown wider since.
These are United States procurement contract prices from around 2019 and 2020. The battery electric price has since risen, per source 2, to 800,000 to 1.2 million dollars by 2023, so this chart shows the price at that time, not the current price.
Show the numbers
| Diesel bus | 410,000 to 500,000 dollars |
| Battery electric bus | 660,000 to 800,000 dollars |
What full lifecycle studies find
A lifecycle study adds up the purchase price, the fuel, and the repairs a bus needs across its whole working life. A 2018 study of Bratislava, Slovakia found a diesel bus cost about 575,000 euros over 10 years, against about 700,000 euros for a battery electric bus, and found the electric bus does not turn cheaper until around year 17 of operation, past the 12 year lifecycle federal funding rules require of a United States transit bus. A 2016 study of Finland and California found battery electric buses ran 1.2 to 1.5 times the cost of diesel over a 12 year window, and a 2024 Israeli study still found a diesel bus cheaper to run per kilometer than a battery electric one.
The electric bus in this same study does not turn cheaper than the diesel bus until around year 17 of operation, past the 12 year window this chart covers.
Show the numbers
| Diesel bus | 575,000 |
| Electric bus | 700,000 |
Only 1 study found electric cheaper
Of the 6 national lifecycle studies gathered in a 2025 peer reviewed review, only 1 found the battery electric bus finishing cheaper, a 2024 study of 30 Polish cities. It put a diesel bus at 2.92 million euros over 14 years, against 2.55 million euros for a battery electric bus charged by plug and 2.89 million euros for one charged by pantograph, a device that lowers from overhead wiring to charge the bus without a cable. The Polish study is also the only 1 of the 6 that counted the cost of labor inside the total, a difference in method rather than proof the other 5 studies are out of date. Reading all 6 studies together, rather than reaching for the 1 result that favors electric, is what the lifecycle numbers actually show.
This is the only 1 of the 6 studies gathered here that finds the electric bus cheaper, and the only 1 that counts labor cost inside the total, a difference in method, not proof the other studies are out of date.
Show the numbers
| Diesel bus | 2,920,000 |
| Electric bus, pantograph charging | 2,890,000 |
| Electric bus, plug in charging | 2,550,000 |
New Jersey chose diesel anyway
The New Jersey transit agency voted in 2023 to spend 685 million dollars on 750 more diesel buses. Kevin Corbett, then president and chief executive of the agency, gave the reliability of the fleet as the reason, not price. The agency has bought electric buses before, 85 of them for 65.8 million dollars in 2019 and 8 more for 9.4 million dollars in 2021, and it has set a target of buying only zero emission buses starting December 2032.
New Flyer confirmed the diesel order again in 2025, a firm contract for 200 articulated buses with an option for 550 more and deliveries starting in 2026.
This procurement marks a key milestone in our commitment to delivering a fully modernized bus fleet by 2031.
Kris Kolluri, president and chief executive of the New Jersey transit agency. Source 5.
A diesel bus still wins or ties on total cost in most of the lifecycle studies collected here, and the agency chose it anyway on a different measure entirely, reliability rather than price.