Ranch Country Where Three States Meet
Belle Fourche is the Butte County seat in the far northwest corner of South Dakota, where the Redwater and Belle Fourche rivers join and the Wyoming line is a short drive west. Montana lies to the north along U.S. 85. The Census Bureau estimated about 5,800 people in the city in 2025 and a little under 11,000 in Butte County. The town's riverside monument marks it as the closest community to the geographic centre of the fifty states, and the Black Hills Roundup has drawn rodeo crowds around the Fourth of July for more than a century. BOMCAS works with Belle Fourche households and businesses remotely.
Rules that hold across the whole state are gathered in our South Dakota overview; this page stays with Belle Fourche and Butte County.
Cattle, Sheep, Hay and Clay
The economy rests on a few things that do not change much from year to year. Cattle and sheep ranches spread across the county's grassland, and the Belle Fourche irrigation project, fed by the reservoir behind Orman Dam to the east, waters hay and alfalfa ground around Newell and Nisland. Bentonite, the swelling clay used in drilling mud, foundry sand, kitty litter and sealants, is mined and processed in the area by companies including American Colloid and Bentonite Performance Minerals, and those operations support truckers, mechanics and contractors. Spearfish, about ten miles south, supplies shopping, health care and Black Hills State University, and many residents work in one town and live in the other.
A Growing Main Street
Local business groups counted more than twenty new businesses opening in 2025, and a 76-room hotel with a conference centre began construction in April 2026 with roughly a year of work planned. New owners are setting up books, sales tax licences and payroll for the first time, and investors are weighing depreciation on new buildings.
Sales Tax in Belle Fourche
- Belle Fourche levies a 2 percent municipal sales tax (code 027-2), so most purchases are taxed at 6.2 percent.
- Its 1 percent gross receipts tax (code 027-1) applies to all four categories the state allows: lodging, eating establishments, alcohol and admissions. Rodeo tickets, motel rooms and restaurant meals are therefore taxed at 7.2 percent.
- Belle Fourche is one of the communities covered by the state's rally rates during the Sturgis motorcycle rally in August, when the 1.5 percent tourism tax is added on top.
- Butte County had not adopted the new half-percent county sales tax as of mid-October 2026. Counties may start the tax only on January 1 or July 1, so the earliest it could apply is mid-2027 if commissioners act later.
- The state rate is scheduled to rise to 4.5 percent on July 1, 2027, taking the general rate in Belle Fourche to 6.5 percent unless the county adds its own tax.
Working in Wyoming or Montana
Because two other states are so close, many Belle Fourche returns involve work across a state line. Wyoming has no individual income tax, so a bentonite worker or contractor commuting west usually files only federally. Montana is different. It taxes nonresidents on income earned there, so wages from a Montana job site, or a business with Montana customers and crews, can require a Montana nonresident return. Montana has no general sales tax, which means equipment and supplies bought there and brought home are usually subject to South Dakota use tax at the full local rate.
Who We Work With
Our Belle Fourche clients include ranch and farm families on irrigated and dryland ground, bentonite employees and the trucking and service firms that support the mills, contractors working on the new hotel and other projects, new and long-established Main Street businesses, retirees, and Canadians with cattle, land or rodeo winnings in the area.
How BOMCAS Helps in Belle Fourche
Belle Fourche clients often start with bookkeeping for a ranch, haul business or new shop, sales and use tax filings that cover Montana purchases and admissions, and payroll for hands, crews and seasonal staff. Each year we prepare business returns and personal returns, and use them for planning around land, livestock and retirement. Anyone with unfiled years can begin with back taxes and late filing, and Canadians with land, cattle or winnings here can read about cross-border tax.
Across the rest of South Dakota, we also write about business tax returns, personal tax returns, sales and use tax, bookkeeping, payroll, tax planning, back taxes and late filing and cross-border tax.
Belle Fourche Questions
What is the sales tax rate in Belle Fourche?
6.2 percent on most purchases and 7.2 percent on lodging, meals, alcohol and admissions. The general rate is scheduled to become 6.5 percent on July 1, 2027.
Does Butte County have a county sales tax?
Not as of mid-October 2026. If it adopts one later, the earliest start date would be January 1 or July 1.
I live in Belle Fourche and work in Wyoming. Do I file a Wyoming return?
No. Wyoming has no individual income tax.
What about a job in Montana?
Montana taxes nonresidents on wages earned there, so a nonresident return may be needed.
Talk to BOMCAS About Your Belle Fourche Taxes
In the southeast corner of the state, our Sioux Falls pages cover South Dakota's largest city, its split between Minnehaha and Lincoln counties, its own lodging tax and a workforce that commutes in from Minnesota and Iowa.
On the other side of the state, our Rapid City pages deal with Black Hills tourism taxes, the hotel improvement district, Ellsworth Air Force Base and crews working across the Wyoming line.
In eastern South Dakota near the Minnesota line, our Brookings pages cover South Dakota State University, the city's manufacturing employers, its pillow tax for larger hotels and work across the nearby Minnesota line.
In the northeast, our Aberdeen pages deal with farm cooperatives and equipment dealers, 3M and other plants, two hospitals, Northern State University, the city's hotel and downtown district taxes and jobs across the North Dakota line.
Between Lake Kampeska and Pelican Lake, our Watertown pages cover Terex and the city's other manufacturers, Lake Area Tech, lake cabin rentals, the hotel improvement district and jobs over the Minnesota border.
On the Missouri River across from Nebraska, our Yankton pages look at Avera Sacred Heart, the city's manufacturers, Mount Marty University, Lewis and Clark Lake businesses and the many households that live or work on the Nebraska side.
Along Interstate 90 in the James River valley, our Mitchell pages cover the Corn Palace and its visitors, trailer and component manufacturers, Avera Queen of Peace, two colleges and the hotel district charge.
On the James River in the centre of the eastern half of the state, our Huron pages cover the State Fair, Dakota Provisions and its growers, Hutterite colony accounts, Huron's Karen and other new American families and the city's hotel room tax.
At the mouth of Spearfish Canyon in the northern Black Hills, our Spearfish pages deal with Black Hills State, newcomers and retirees, vacation rentals, the Lawrence County tax that starts in 2027 and work over the Wyoming line.
In the state capital on the Missouri River, our Pierre pages cover public employees and retirees, statewide associations and nonprofits, Lake Oahe outfitters, two hotel districts and the Hughes County tax that begins in July 2027.
Beside Ellsworth Air Force Base east of Rapid City, our Box Elder pages focus on military households and veterans, base subcontractors and homebuilders, new businesses and a city split between Pennington and Meade counties.
Home to the University of South Dakota, our Vermillion pages cover faculty and graduate students, international scholars, student-rental landlords, campus-area restaurants and the Clay County sales tax vote.
East of the Big Sioux on I-90, our Brandon pages speak to young families, home-based businesses, trades and homebuilders, new storefronts at the interchange and a Minnehaha County rate that stays put in 2027.
On the Lincoln County edge of the metro, our Harrisburg pages cover subdivision developers and homebuilders, landowners selling to developers, new households and Lincoln County's sales tax that begins in January 2027.
Below Bear Butte, our Sturgis pages deal with rally businesses and temporary vendors, rally-week home rentals, VA staff and veterans at Fort Meade, and the Meade County tax that starts in January 2027.
Just off I-29 in Lincoln County, our Tea pages cover manufacturers and distributors, mechanical and electrical contractors, interstate franchises, young families and the county sales tax that begins in January 2027.
Between Lake Madison and Lake Herman, our Madison pages cover Dakota State University faculty and students, technology consultants, the Manitou plant and its suppliers, lake cabin rentals and Lake County farms.
Tell BOMCAS about your Belle Fourche ranch, business or household and we will reply with next steps and what we need for a quote. Reach us through the contact page or the form below, by phone at 780-667-5250 or by email at info@bomcas.ca. All of our Belle Fourche services are listed on the South Dakota overview. This page is general information, not advice for your situation.