What This Guide Covers
The vehicle and operating thresholds that trigger IRP and IFTA, and the recurring filing rhythm each program follows.
How This Area Fits Your Operation
IFTA applies to a 'qualified motor vehicle' — generally 2 axles and over 26,000 lb, 3+ axles regardless of weight, or a combination over 26,000 lb — operating in two or more IFTA member jurisdictions. IRP applies on a similar cross-jurisdiction principle for apportioned vehicle registration, but its exact qualification and exemptions are set individually at the base-jurisdiction (state) level, not by one uniform federal threshold — a vehicle that clears the IFTA weight/axle test is not automatically covered or exempt from IRP as well; the two programs qualify vehicles independently of each other.
- SourceThe IRP Plan — IRP, Inc.· Multi-state/provincial agreement · checked 2026-09-16
Records To Organize
- Mileage records by jurisdiction for each qualified vehicle
- Fuel purchase records supporting the IFTA return
- IRP cab card and apportioned registration documentation
- Base-jurisdiction registration and renewal correspondence
Dates That May Require Attention
- IFTA quarterly return: due the last day of the month following each quarter's end, moved to the next business day if that date is a weekend (legal-holiday adjustment is jurisdiction-specific)
- IRP renewal, on the base jurisdiction's own registration cycle
- SourceIFTA Articles of Agreement (qualified motor vehicle definition) — IFTA, Inc.· Multi-state/provincial agreement · checked 2026-09-16
How DOT Serenity Fits
DOT Serenity tracks the recurring filing dates for IRP and IFTA and calculates each one directly from your carrier information. When a filing needs to be handled on your behalf, our team can help.