CFTP vs. IFTA in California: When to Use a Fuel Trip Permit and When to Get the License
Not tax advice. WheelsAndAxle builds IFTA worksheets as a preparation aid. We are not a CPA, tax advisor, or filing service. You must check all figures with your base jurisdiction before you file. Rules change — always check the source links below.
The Short Answer
California gives truckers who cross state lines three ways to cover their fuel tax:
- IFTA license — one license, one set of decals, quarterly filing, covers every IFTA state and province
- California Fuel Trip Permit (CFTP) — a single-trip pass, good for four days, no quarterly filing for those CA miles
- Interstate User Diesel Fuel Tax license — for carriers who only run between California and a non-IFTA place (like Mexico)
Most owner-operators pick IFTA. But if you only cross into California a handful of times a year, CFTP might save you time and hassle.
This post breaks down how each one works, what they cost, and how to pick the right one.
What Is the CFTP?
The California Fuel Trip Permit lets an out-of-state truck enter California for up to four straight days without holding an IFTA license or a California fuel tax license.
Key facts (source: CDTFA):
- Cost: $30 per permit, per truck
- Good for: up to four days in a row — not before or after the dates you pick
- One per truck: you need a fresh permit for each rig that enters the state
- Must be bought before you cross the border — not after
- Where to buy: online at the CDTFA website (open around the clock), in person at any CDTFA office, or at most California DMV offices
The CFTP also works for California-based carriers who leave the state and come back without a fuel tax license.
What Is IFTA?
IFTA — the International Fuel Tax Agreement — is a deal among 48 U.S. states and 10 Canadian provinces. You get one license from your home state, stick one set of decals on your truck, and file one quarterly worksheet that settles your fuel tax across every IFTA place you drove through.
In California, the IFTA license is handled by the CDTFA (source: CDTFA):
- License fee: $10 per year
- Decals: $2 per set (one set per truck)
- Filing: quarterly, due the last day of the month after each quarter ends (April 30, July 31, October 31, January 31)
- Must file even if you did not leave California that quarter — a zero-mile filing is still due
To get a California IFTA license, you must have a real business address in California (a P.O. box will not work), register your trucks with the California DMV, and control your fleet's work and records from within California.
Side-by-Side: CFTP vs. IFTA
| CFTP | IFTA | |
|---|---|---|
| Cost | $30 per trip, per truck | $10/year + $2/set of decals per truck |
| Good for | 4 days | 1 year (renew each December) |
| Filing | None — those CA miles stay off your IFTA worksheet | Quarterly worksheet (even if zero miles) |
| Covers | California only | All 48 IFTA states + 10 provinces |
| Buy it | Online, CDTFA office, most CA DMV offices | Online through CDTFA |
| Best for | Rare CA trips (a few times a year) | Regular CA runs |
The Math: When Does Each One Win?
The break-even is straightforward. An IFTA license costs $12 per truck per year ($10 license + $2 decals). A CFTP costs $30 per trip per truck.
One truck, one year:
- 1 CA trip: CFTP = $30. IFTA = $12 + time spent on quarterly filings. CFTP might win.
- 2 CA trips: CFTP = $60. IFTA = $12. IFTA wins on cost.
- 12 CA trips: CFTP = $360. IFTA = $12. Not even close.
But cost is only half the story. With IFTA, you must file four times a year — even quarters where you never left your home state. With CFTP, those California miles never show up on your worksheet at all. If you hate paperwork and only hit CA once or twice, the $30 per trip might be worth it.
The rule of thumb: if you go to California more than once a quarter, get the IFTA license. If you only cross into CA a few times a year and want to keep your filings lean, the CFTP works fine.
The Qualified Motor Vehicle Rule
Both CFTP and IFTA apply only to qualified motor vehicles. California follows the IFTA definition (source: CDTFA):
- A truck with two axles and a gross vehicle weight over 26,000 pounds, or
- A truck with three or more axles (any weight), or
- A combo rig whose total weight tops 26,000 pounds
Pickup trucks under 26,000 lbs with only two axles do not need either one. RVs used only for fun are also left out — but if the RV is used for any kind of work, it counts.
What Happens If You Enter California Without Either One?
California does not play around. If you drive a qualified truck into the state without an IFTA license, an Interstate User license, or a CFTP, you face (source: CDTFA):
- A fine of $100 to $500
- If you owe fuel tax on top of that: the fine jumps to $500 or 25% of the tax owed — whichever is higher
- Your truck can be held until all taxes, fines, interest, and storage fees are paid
A $30 permit looks cheap next to a seized rig.
The Third Option: Interstate User Diesel Fuel Tax License
There is a third path most truckers never need. The Interstate User Diesel Fuel Tax license is for carriers who run between California and a place that is not in IFTA — most often Mexico (source: CDTFA).
Non-IFTA places: Mexico, Alaska, Hawaii, Washington D.C., and Canada's Nunavut, Yukon, and Northwest Territories.
If your truck only runs California-to-Mexico and back, you cannot get IFTA (because Mexico is not a member). You need either this license or a CFTP for each crossing.
The Interstate User license has no fee to get. But you must file returns — and it only covers California, not other states.
How to Pick: A Quick Decision Tree
- Do you run into California at all? No — you do not need any of these.
- Do you run between California and another IFTA state (like Arizona, Nevada, Oregon, Texas)? Yes — get the IFTA license. It covers CA and every other state in one shot.
- Do you only run California-to-Mexico? Yes — get the Interstate User license (free) or buy a CFTP each trip.
- Do you cross into CA less than once a quarter and want to skip the CA filing hassle? Maybe — the CFTP keeps those miles off your worksheet. But weigh the $30/trip cost.
- Do you run a mixed fleet where some trucks go to CA often and others rarely? You can use IFTA for the trucks that run CA often and CFTP for the ones that go once in a while.
One More Thing: CFTP Miles and Your IFTA Worksheet
When you buy a CFTP, the miles you drive in California under that permit are not part of your IFTA filing. Your IFTA worksheet should leave those miles out.
This matters because it changes your total miles, your miles-per-gallon figure, and the fuel split across every other state. If you mix CFTP trips and IFTA-covered trips to California in the same quarter, you need to track which miles fall under which — carefully.
Sources
All facts in this post come from these California state sources:
Disclaimer: WheelsAndAxle generates IFTA worksheets as preparation aids only. We are not a tax advisor, CPA, or filing service. Users bear sole responsibility for verifying all figures with their base jurisdiction before filing.
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