South Dakota Oversize Permit Cost: Worked Examples

Three worked South Dakota moves: the flat single-trip permit, the two-cent ton-mile overweight charge, and the Black Hills escort widths.

By Evan Reid, Founder of Haul Handbook · Updated Sep 27, 2026 · 8 min read

South Dakota prices an oversize move in two pieces: a flat fee for the paper, and, when the load is heavy, a charge that runs by the ton and the mile. A single-trip permit costs

$25.00

whatever the load weighs; overweight adds two cents for each ton or fraction of a ton of gross weight above an axle-count line, for each mile on state trunk highways. Every current figure renders with its official source on the South Dakota oversize and overweight permits page. This guide walks three moves through the schedule so the numbers read like a quote. To see where your load crosses a legal line in the first place, run it through the oversize permit cost estimator.

How South Dakota builds the number

The schedule has no tiers of permit classes by size. Four conditions shape any quote instead:

Permit type: a single trip, a self-issuing book of ten, or an extended-period annual.
Weight: two cents per ton-mile above the axle-count threshold, which runs from 40,000 pounds at two axles to 95,000 pounds at seven or more, with a one dollar minimum.
Route: escorts keyed to width, with named Black Hills highways that trigger at half the usual width.
Clock: daylight rules that attach to width and height, plus weather limits that can void the permit outright.

Worked example 1: the wide-only combine haul

A dealership moves a 12-foot-wide combine from Sioux Falls to a farm near Mitchell on plains highways, with height and weight inside the legal envelope. Legal height in South Dakota is 14 feet including the load under SDCL 32-22-14, and a combine on a step deck sits well under it. Width is the only dimension crossed.

The permit line is one number: $25.00. At 12 feet the move needs no escort: the interstate trigger sits at 16 feet and the general trunk system at 20, and this route stays off the Black Hills lists where the trigger drops to 10 feet. What the width does buy is a clock. ARSD 70:03:01:07 restricts any vehicle wider than 10 feet to daylight hours, so the haul plans around sunset rather than around an escort budget. The permit must be secured before the move: online through the state permitting system at sdtruckinfo.sd.gov, by phone at the Permit Center at (605) 224-7364 on weekdays, or from any Highway Patrol district office, trooper, or motor carrier inspector.

Worked example 2: the overweight excavator, ton-mile math

A five-axle lowboy grossing 95,000 pounds runs 150 miles of state trunk highway with a tracked excavator. The permit itself stays the same flat $25.00; the weight is what bills.

The excess-weight arithmetic in the ARSD 70:03:01:02 fee schedule is three steps. Five axles set the threshold at 85,000 pounds. The load sits 10,000 pounds over the line, which is five tons. Two cents bill for each of those tons, for each mile: five tons across 150 miles adds 15 dollars to the permit fee. A load one ton over on a short hop still bills at the one dollar minimum, so no overweight mile is free. Loads over 80,000 pounds carry a second cost line before the permit is used: commercial license fees must be paid to the permitted maximum gross weight under SDCL 32-9-15, so the registration prices the heavy move along with the paper. Spring planning matters too, because maximum axle loadings drop on restricted highways each year from February 15 through April 30 under SDCL 32-22-24, and the same rig can carry less legal weight in March than in May.

Worked example 3: the repeat mover, the book and the annual

A machinery dealer runs a 12-foot-wide piece weekly through the season. Single trips stack up, and South Dakota sells the volume answer directly: a book of ten self-issuing single-trip permits for $250.00, the same per-permit price, with the carrier writing each permit instead of calling one in. Two conditions apply: the Permit Center validates the book before use, and only the Highway Patrol Motor Carrier Services office in Pierre sells the books, by letter or in person at 118 W. Capitol Avenue.

When the loads are non-divisible and fit the annual caps, width to 14 feet 6 inches, the extended-period oversize permit at

$60.00

covers a year of trips under ARSD 70:03:01:02.01. The breakeven arrives early: three single trips already outprice the annual, so a dealer moving weekly stops buying paper by spring. Farmers have their own lane, the harvest permit at 75 dollars, sold by county treasurers and ports of entry as well as the Patrol.

What an escort adds in South Dakota

ARSD 70:03:01:20 keys escorts to width and to the road. Over 16 feet takes one escort on the interstate, in front on two-lane highways and at the rear on divided ones. Over 20 feet takes one on the rest of the state trunk system, where the issuing authority can add escorts for route limits, traffic, or an unusual configuration, and a local trooper can waive the front car where the road allows. Then the Black Hills clause: on the named highways through the Hills and Badlands, US 14A, US 85, US 385, SD 44, SD 231, US 16A, SD 244, SD 87, SD 89, SD 36, SD 40, and SD 473, the front escort attaches above 10 feet, so a load that runs bare across the plains picks one up on a scenic route. A second listed set, including US 16 from the Keystone Wye to the Wyoming line, SD 71, and SD 471, takes the front escort above 16 feet.

The escort itself is equipment under ARSD 70:03:01:21: a licensed motor vehicle, never a motorcycle, carrying a revolving amber light or two flashing amber lights at least four inches across, and a sign reading WIDE LOAD AHEAD on the front car or WIDE LONG LOAD on the rear one, in letters at least 12 inches high. A load that reaches more than 2 feet into an adjacent lane adds flagpersons or more escorts. Weather can void the paper regardless: under ARSD 70:03:01:20.02 a permit is not valid when visibility falls to half a mile or less, or when the road surface turns slippery with snow, ice, slush, or frost.

The buying rule and the insurance floor

Two conditions outrank the fee math. Permits must be secured before the move or before entering the state, which is what the online system, the weekday phone window, and the self-issuing books all serve. And every permit applicant carries a liability floor set by ARSD 70:03:01:11: 100,000 dollars per person, 300,000 dollars per accident, and 100,000 dollars in property damage, or qualification as a self-insurer under SDCL 32-35-90.

For a quick quote: flat fee for the paper, ton-mile math for the weight, the escort map for the route, the daylight clock for the width. Compare South Dakota against the same move elsewhere on the oversize permit costs by state table, and see every other credential the state expects at South Dakota trucking permits.

FAQ

How much does a South Dakota oversize permit cost?

ARSD 70:03:01:02 prices a single-trip oversize or overweight permit at 25 dollars, a book of ten self-issuing single-trip permits at 250 dollars, and the extended-period annual permits at 60 dollars each. Overweight loads add two cents for each ton or fraction of a ton of gross weight above the axle-count threshold, for each mile on state trunk highways, with a one dollar minimum.

How is the South Dakota overweight charge calculated?

The fee schedule in ARSD 70:03:01:02 sets a gross-weight threshold by axle count: 40,000 pounds at two axles, 60,000 at three, 80,000 at four, 85,000 at five, 90,000 at six, and 95,000 at seven or more. Two cents bill for each ton or fraction of a ton above that line, for each mile traveled on state trunk highways, and the charge never comes in under one dollar.

When does a South Dakota oversize load need an escort?

ARSD 70:03:01:20 sets the triggers by width and by road. Over 16 feet takes one escort on the interstate, in front on two-lane highways and at the rear on divided ones. Over 20 feet takes one everywhere else on the state trunk system. On the named Black Hills and Badlands highways, including US 385, SD 87, and US 16A, the front escort attaches above 10 feet, half the usual width.