The fee is based upon the carbon content of a given fuel, with a commonly-proposed starting point being $10–$16 per ton of carbon that would be emitted once the fuel is burned.
Poplatok závisí od obsahu uhlíka v danom palive, pričom bežne navrhovaný začiatočný bod je $10–$16 na tonu uhlíka, ktorý by unikol pri spaľovaní paliva.