Today is the last day for the federal carbon tax. Theoretically, that should mean a drop of close to 20 cents per litre in the price of gas tomorrow but it’s unclear as to just how that will play out at the pumps.

Prime Minister Mark Carney followed through on a campaign promise to eliminate the tax, but the enabling legislation has not yet been repealed.

The carbon tax costs about 17 cents per litre of gasoline, 21 cents per litre of diesel and 15 cents per cubic metre of natural gas, according to the Canadian Taxpayers Federation.

The federation estimates that the tax cost Newfoundlanders and Labradorians nearly $143 million through 2024.

Cheques are in the mail for the final rebate of $149 per person, while a family of four will get a payment of $298. Those amounts are higher for those who qualify for the rural top-up.

In Nova Scotia, the pricing regulator says it recognizes that retailers who have paid the carbon tax on inventory remaining in their tanks after today will be unable to recover their costs when the tax is removed on Tuesday.

The Utility and Review Board says it will take short-term action to ensure the security of supply of gasoline and diesel in the province during the transition.

The board says it will develop a mechanism to provide interim relief under the Petroleum Product Pricing Regulations.