At the Mouth of Spearfish Canyon
Spearfish lies on Interstate 90 in the northern Black Hills, where Spearfish Creek leaves the canyon, and the Wyoming line is less than 20 miles to the west. The Census Bureau estimated about 14,200 residents in 2025, and Lawrence County, which also includes Deadwood, Lead and Whitewood, had about 29,500. The city combines a university, a regional hospital, a steady flow of visitors and a growing number of retirees and remote workers who chose the Black Hills. With no South Dakota income tax, local tax work centres on federal returns, a sales tax picture that changes twice in 2027, payroll and business across the Wyoming line. BOMCAS serves Spearfish clients remotely.
Statewide rules for every community are explained in our South Dakota overview, which leaves this page free to focus on Spearfish and Lawrence County.
Campus, Hospital and Growth
Black Hills State University reported 3,502 students for fall 2026, a five-year high, with its largest incoming class in a decade. The university and Monument Health Spearfish Hospital are the city's largest employers, followed by retail, construction, tourism and professional services. Housing is tight: in November 2026 the mayor said about 400 apartments were expected over the following year, and builders, landlords and property managers are busy as a result.
Sales Tax in Spearfish, 2026 and 2027
- Through December 2026, most purchases in the city are taxed at 6.2 percent: 4.2 percent state tax plus Spearfish's 2 percent municipal tax, code 334-2.
- Lawrence County adopted the new half-percent county tax under Ordinance 2026-01, starting January 1, 2027. The general rate in Spearfish becomes 6.7 percent.
- When the state rate returns to 4.5 percent on July 1, 2027, the general rate becomes 7.0 percent.
- Meals, alcohol, lodging, campsites and admissions also carry the city's 1 percent gross receipts tax, code 334-1. A quarter of that revenue goes to Visit Spearfish for promotion.
- Lodging under 28 days adds the 1.5 percent state tourism tax, so a room in Spearfish will be taxed at about 9.2 percent from January 2027 and 9.5 percent from July 2027.
- Hotels in the city's business improvement district also remit $2 per room night to the city each month.
Visitors and the Rally
Spearfish Canyon, the D.C. Booth Historic National Fish Hatchery, trails and the northern Hills draw visitors from spring to autumn, and the Sturgis Motorcycle Rally in August fills every room within reach. Hotels, vacation rentals, campgrounds, outfitters, restaurants and shops see sharp seasonal swings, and many collect several taxes on each sale.
Wyoming Next Door
Beulah, Sundance and the Wyoming ranch and mining country are a short drive west. Wyoming has no individual or corporate income tax, but it has its own sales and use tax and runs workers' compensation through a state fund. Spearfish contractors, suppliers and service firms that work in Wyoming need to check registration there before the first job.
Contractor Licences
Spearfish requires a city contractor's licence for construction, remodelling and other contracting work within city limits and the surrounding joint powers area. Applicants submit through the city's online portal with a certificate of liability insurance of at least $1 million per occurrence and $2 million aggregate naming the city as certificate holder, and a South Dakota contractor's excise tax number. Licences run for the calendar year, and renewals open 60 days before year end.
How BOMCAS Helps in Spearfish
Spearfish clients often start with monthly bookkeeping, sales, county and hotel district filings and payroll for seasonal staff and crews. Each year we prepare business returns and personal returns, including part-year returns for newcomers, and then turn to planning for moves, retirement and property. Anyone behind can start with back taxes and late filing, and Canadian students, owners and retirees can read about Canada–U.S. tax.
Across the rest of South Dakota, our state guides on business taxes, personal taxes, sales and use tax, bookkeeping, payroll, tax planning, late filing and Canada–U.S. tax apply the same rules more broadly.
Spearfish Questions
What will the sales tax rate be in Spearfish in 2027?
Most purchases go from 6.2 percent to 6.7 percent on January 1, 2027, when the Lawrence County tax starts, and to 7.0 percent on July 1, 2027, when the state rate rises.
Does the county tax apply in Deadwood and Lead too?
Yes. The Lawrence County tax applies throughout the county, in addition to each city's own taxes.
Do I need a contractor's licence to work in Spearfish?
Yes, for construction and remodelling inside the city and its joint powers area. You need liability insurance and a South Dakota contractor's excise tax number to apply.
Does Wyoming tax my wages if I work in Sundance?
No. Wyoming has no individual income tax, and South Dakota does not tax wages either.
Talk to BOMCAS About Your Spearfish 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.
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.
Where the Redwater meets the Belle Fourche River, our Belle Fourche pages look at cattle and sheep ranches, irrigated hay ground, bentonite haulers and mills, jobs in Montana and a Butte County that has not added a sales tax.
Let BOMCAS know about your Spearfish business or household and we will reply with next steps and the information we need for a quote. Reach us through the contact page or the form below, at 780-667-5250 or by email at info@bomcas.ca. All Spearfish services are gathered on the South Dakota overview. This page is general information and not advice for your situation.