New Brunswick IFTA Fuel Tax Rate, 4th Quarter 2025
New Brunswick's IFTA diesel rate for the 4th quarter of 2025 is $0.4239 per gallon (C$0.1545 per litre), down $0.0075 from Q3 2025.
New Brunswick rate for Q4 2025
Special diesel, Q4 2025
$0.4239
per US gallon, down $0.0075 from Q3 2025
- Diesel tax rate
- $0.4239/gal
- Surcharge
- None listed
- Native rate
- C$0.1545/litre
- IFTA exchange rate
- 1 USD = 1.3797 CAD
- Quarter
- Q4 2025, from Oct 1, 2025
- Change vs last quarter
- down $0.0075
New Brunswick taxes fuel by the litre in Canadian dollars. The IFTA matrix shows C$0.1545 per litre as $0.4239 per US gallon, using that quarter's exchange rate of 1.3797 CAD to the US dollar.
Worked example: the New Brunswick line of your IFTA return
Change the numbers to match your quarter. Prefilled with 10,000 total miles on 1,550 gallons, 1,200 of those miles in New Brunswick, and 100 gallons bought there.
New Brunswick vs. its neighbors, Q4 2025
| Jurisdiction | Diesel + surcharge | vs. NB |
|---|---|---|
| Quebec | $0.5542 | +$0.1303 |
| New Brunswick | $0.4239 | — |
| Nova Scotia | $0.4225 | −$0.0014 |
| Prince Edward Island | $0.3882 | −$0.0357 |
| Maine | $0.3120 | −$0.1119 |
On an IFTA return, a higher rate doesn't mean you pay more overall. Fuel you buy in a high-rate state earns a bigger credit. What matters is where you burn the fuel versus where you buy it.
New Brunswick rate, last 4 quarters
Source: IFTA, Inc. Fuel Tax Rate Matrix, 4th Quarter 2025 · Effective Oct 1, 2025 · Last verified Sep 28, 2026
IFTA, Inc. publishes the rates each member jurisdiction reports. New Brunswick's tax agency is the final word on its rate.
Estimates for planning. Confirm with your tax pro or your base jurisdiction's IFTA office before filing.