By Evan Reid, Founder of Haul Handbook · Updated Sep 28, 2026
ITD Commercial Vehicle Services issues Idaho's special (oversize and overweight) permits through the online Idaho Transportation Routing and Permitting System (ITRPS) at permits4idaho.com, at ports of entry, or by phone, under IDAPA 39.03.01 and Idaho Code 49-1004. Legal no-permit limits are 8 feet 6 inches wide, 14 feet high, and 80,000 pounds gross on interstates, but Idaho allows 105,500 pounds gross on its other highways, and up to 129,000 pounds on designated routes with an annual extra length/excess weight permit. A single-trip oversize permit is $30; a single-trip overweight or overweight/oversize permit is $33 plus a per-mile road use fee set by axle count and gross weight in 49-1004(2). Escort and travel-time rules depend on the route color (red, black, or white) on ITD's Pilot/Escort Vehicle Travel Requirements map.
Who issues what in Idaho
The permit pages
Idaho-specific requirements
Idaho splits trucking compliance three ways and sells no state operating authority. The Idaho State Police Commercial Vehicle Safety unit runs intrastate safety under IDAPA 11.13.01 and the intrastate USDOT number requirement; ITD's DMV Commercial Vehicle Services registers commercial vehicles (intrastate Full Fee and IRP), takes motor carrier insurance filings, sells hazmat endorsements and hazardous waste permits, and issues oversize and overweight permits through ITRPS; and the Idaho State Tax Commission administers IFTA. There is no state carrier number and no weight-distance tax, but trucks over 60,000 pounds pay a registration fee set by both declared weight and annual miles.
Registration priced by weight and miles above 60,000 pounds
Idaho Code 49-434(8) sets the annual registration fee for commercial and farm vehicles over 60,000 pounds from a table of declared gross weight (60,001 pounds up to 129,000 pounds in 2,000-pound bands) against miles driven in the preceding year (1 to 7,500; 7,501 to 20,000; 20,001 to 35,000; 35,001 to 50,000; over 50,000), plus a $25 additional fee. At 78,001 to 80,000 pounds the fee is $480, $1,100, $1,700, $2,300 or $3,360 across those five mileage columns. A vehicle registered over 60,000 up to 106,000 pounds that travels fewer than 2,500 Idaho miles a year pays a flat $255 (49-434(8)(e)). Vehicles at or under 60,000 pounds pay a weight-only fee from 49-434(1).
105,500 pounds legal off the interstate, 129,000 on designated routes
Idaho Code 49-1001 allows 105,500 pounds gross on Idaho highways other than the interstate system, where the cap is 80,000 pounds. Reducible loads may run above 105,500 up to 129,000 pounds on non-interstate routes shown on the Designated Routes up to 129K map under an annual special route permit (49-1004(4)), with registration paid for the higher weight.
Annual hazardous materials endorsement and hazardous waste permits
Every vehicle whose hazardous material cargo requires placarding under 49 CFR Part 172, is regulated by 49 CFR Part 171, or must meet the Department of Environmental Quality manifest requirements needs an annual $15 Idaho vehicle registration endorsement from ITD before operating (Idaho Code 49-2203), and every vehicle hauling placarded or manifested hazardous waste, or regulated PCB waste, needs a hazardous waste permit at $20 for a single trip or $250 a year (49-2202). Government vehicles are exempt. Carriers may pass both fees along to the shipper. ITD sells both through CRS or on forms ITD 3114 and ITD 4845.
No state authority, but a Form E for haul-for-hire
Idaho has no intrastate operating authority, yet ITD will not register a haul-for-hire intrastate vehicle without an insurer-filed Form E showing the $750,000 IDAPA 39.02.80 minimum for common and contract property carriers, and a cancellation of that coverage can revoke the vehicle registration.
Agricultural haulers excepted from the intrastate DOT number
The Idaho State Police DOT page carves carriers exclusively engaged in transporting agricultural commodities out of the intrastate DOT number requirement, and Idaho Code 49-1233(4) exempts transporters of agricultural products, forest products, mine products (except petroleum), household goods and several other classes from the board's motor carrier insurance levels, leaving them at the basic 49-117 coverage.
Oversize rules keyed to route colors
Pilot car counts and travel hours in Idaho depend on whether a route is red, black or white on ITD's Pilot/Escort Vehicle Travel Requirements map. On red routes a load wider than 8 feet 6 inches needs a front pilot and travel stops at 2 p.m. Friday until Monday; on black routes no pilot is needed up to 12 feet wide and loads up to 12 feet wide, 120 feet long and 15 feet high may travel around the clock.
US-12 through the Nez Perce-Clearwater Forest
Under a federal court decision, the U.S. Forest Service reviews oversize loads on US-12 from milepost 74 to 174 that exceed 16 feet wide, 150,000 pounds or 150 feet long, take more than 12 hours to transit, or need roadway or vegetation modification. Those loads also need an ISP safety inspection before the permit, may need ambulances and law enforcement escorts, and only one such load may be on the section at a time (IDAPA 39.03.01.307).
Quarterly installments on registration
Carriers registering under the 49-434(8) weight-and-mileage schedule, intrastate or IRP, may pay at least one-quarter of the annual Idaho fee at registration and the rest in three equal installments as billed (Idaho Code 49-434(10) and (11)); IDAPA 39.02.22 governs the installment accounts and the penalties for missed payments.
Spring breakup axle limits
During spring breakup ITD may post state roadways down to 16,000, 14,000 or 12,000 pounds per axle, cap special-permit width at 12 feet 6 inches on restricted two-lane sections, and hold trucks and buses of 10,000 pounds or more to 30 mph in marked zones; restrictions take effect the day after the signs go up (IDAPA 39.03.01.106).
The Idaho permit system
- Apply or log in (Idaho Transportation Routing and Permitting System (ITRPS); IDAPA 39.03.01.102.02 allows applications online, at ports of entry, or with Commercial Vehicle Services)
- permits4idaho.com/Login.aspx
More Idaho rules that catch carriers out
- State carrier number: detail
- Recorded once in the state intrastate authority page (B1) and cross-referenced here. Idaho issues no carrier number; intrastate carriers above the Rule 19 thresholds get a USDOT number from FMCSA, which the Idaho State Police page says issues both interstate and intrastate numbers. The Idaho account number ITD assigns on the registration application is a registration account, not a carrier credential.
- Weight distance tax: note
- Idaho levies no weight-distance or highway-use tax filed on a periodic return. Distance does enter the registration fee instead: commercial and farm vehicles over 60,000 pounds pay an annual registration fee from the Idaho Code 49-434(8) table, chosen by declared gross weight and the vehicle's (or, under IRP, the fleet's) miles in the preceding year, and intrastate registrants report actual Idaho miles for the prior July 1 to June 30 period on renewal. That is a registration fee paid up front (optionally in quarterly installments), not a mileage tax return.
- ELD intrastate adoption: regulation
- IDAPA 11.13.01.002.04 and 11.13.01.019 (Idaho State Police Motor Carrier Rules, under Idaho Code 67-2901A)
- ELD intrastate adoption: summary
- IDAPA 11.13.01.002.04 adopts for intrastate carriers 49 CFR Parts 356, 365, 380, 382, 383, 385, 386, 387, 388 and 390 through 399, which include the Part 395 hours-of-service and ELD rules, and 002.05 says that where those federal rules would otherwise exempt intrastate carriers, the exemption does not apply (except 391.11(b)(1)). The rule adopts later recompilations of the federal volumes but not subsequent amendments. So intrastate carriers in the full-coverage class (26,001 pounds or more, placarded hazmat, passengers) follow Part 395 on federal terms.
- ELD intrastate adoption: exceptions
- IDAPA 11.13.01.019.01.b applies only a reduced rule set to intrastate property carriers from 10,001 through 26,000 pounds (49 CFR Part 390 Subpart A, 391.15, Parts 392 and 393, and 396.1, 396.3(a)(1) and (2), and 396.5 through 396.9); Part 395 is not on that list, so hours-of-service and ELD rules do not reach that weight band. Intrastate carriers may hire drivers 18 or older (019.01.a).
- Intrastate driver age: detail
- IDAPA 11.13.01.019.01.a: intrastate carriers subject to the incorporated federal rules and ISP safety authority may hire drivers 18 years or older as set forth in Idaho Code 49-303; 002.05 and 019.01.b carve 49 CFR 391.11(b)(1), the federal age-21 minimum, out of the rules applied to intrastate carriers.
Special permits for size and weight
Anything over the legal size or weight limits needs a special permit under IDAPA 39.03.01. ITD sells single-trip and annual permits online through ITRPS, at ports of entry, or through Commercial Vehicle Services. Overweight permits are issued only for non-divisible loads, and overweight single trips also pay a per-mile road use fee.
Trip and fuel permits
A truck not registered for Idaho, or running without an IFTA license, buys a temporary permit before it moves. Carriers self-issue them in CRS with a USDOT number, and the registration permits are capped at a few per vehicle each year.
Hazmat endorsements and hazardous waste permits
A vehicle whose cargo needs placards needs Idaho's annual hazardous materials registration endorsement before it operates, and a vehicle hauling placarded or manifested hazardous waste needs a hazardous waste permit, single trip or annual. ITD sells both through CRS or on its own forms.
Compare beyond Idaho
Running multi-state loads? The trucking permits by state table shows which permit families and issuing offices apply in every jurisdiction, the oversize permit costs by state table compares limits and fees across all 51 jurisdictions, and the permit cost estimator prices a specific load per state.