Q4 2026 IFTA diesel rate
New Mexico IFTA fuel tax rate, Q4 2026
NMNew Mexico · diesel$0.2100/gal
Unchanged from Q3 2026.
Checked 2026-10-14 against tax.newmexico.gov, New Mexico's own published rate.
Calculate New Mexico for Q4 2026Free. No account.
What you owe New Mexico
IFTA apportions your fuel by miles. Divide total miles by total gallons for fleet MPG, turn your New Mexico miles into taxable gallons, subtract the tax-paid gallons you bought in New Mexico, and multiply by $0.2100.
Example: 1,000 miles in New Mexico at 6.5 MPG is 153.85 taxable gallons. With 100 tax-paid gallons bought there, 53.85 × $0.2100 = $11.31 owed to New Mexico.
This rate is for diesel, Q4 2026. You still file with your base jurisdiction; keep your trip records and receipts.