Q4 2026 IFTA diesel rate

Texas IFTA fuel tax rate, Q4 2026

TXTexas · diesel$0.2000/gal

Unchanged from Q3 2026.

Checked 2026-10-14 against comptroller.texas.gov, Texas's own published rate.

Calculate Texas for Q4 2026Free. No account.

What you owe Texas

IFTA apportions your fuel by miles. Divide total miles by total gallons for fleet MPG, turn your Texas miles into taxable gallons, subtract the tax-paid gallons you bought in Texas, and multiply by $0.2000.

Example: 1,000 miles in Texas at 6.5 MPG is 153.85 taxable gallons. With 100 tax-paid gallons bought there, 53.85 × $0.2000 = $10.77 owed to Texas.

This rate is for diesel, Q4 2026. You still file with your base jurisdiction; keep your trip records and receipts.