Business Returns for South Dakota's Largest Economy
Sioux Falls is South Dakota's largest city and its main centre for business, with about 213,700 residents in the Census Bureau's 2025 estimate. It is the home of two regional health systems, a major pork processing plant, national credit card operations and a steady flow of construction. None of these businesses files a South Dakota income tax return, because the state has no corporate or individual income tax. What they do file is a federal return that has to agree with the sales tax, payroll and licensing records they produce all year, and often returns in Minnesota or Iowa as well. BOMCAS prepares those business returns for Sioux Falls companies, remotely and on a schedule that fits the federal deadlines.
Filing deadlines and entity rules are the same statewide and are covered on our South Dakota business tax preparation page, so here we focus on what Sioux Falls adds.
The Sioux Falls Business Mix
The Sioux Falls Development Foundation's employer list shows how varied the local economy is. Sanford Health and Avera Health together employ more than 20,000 people. Smithfield Foods runs one of the city's largest workplaces. Citi, Wells Fargo, First PREMIER Bank and PREMIER Bankcard, and Sammons Financial Group anchor a finance sector that began growing in 1981, when Citibank moved its credit card operations to Sioux Falls after South Dakota removed its interest rate caps. Manufacturers such as Daktronics, Raven Industries and the Showplace and StarMark cabinet makers sit alongside Amazon, Hy-Vee and a regional retail trade that draws shoppers from four states. Each sector brings different return issues.
Medical and dental practices
Independent clinics, dental offices, therapy practices and medical staffing firms around the two hospital systems are usually S corporations or partnerships. Their returns turn on owner compensation, retirement plan contributions and equipment, and on separating exempt health services from taxable product sales, such as retail eyewear or supplements, in the sales tax records.
Contractors and developers
The city's 2024 development summary reported about $1.08 billion in building permit value and 2,214 new housing units. Contractors building that work need contract accounting methods that suit the federal return, and records of contractor's excise tax by project. Developers and landlords need depreciation schedules that separate land, buildings and shorter-lived improvements.
Manufacturers, processors and distributors
Businesses near the I-29 and I-90 interchange that make, store or ship goods deal with inventory costing, depreciation of plant and equipment, and sales into other states that may create income tax filings there.
Vendors to banks and insurers
Financial institutions pay South Dakota's bank franchise tax themselves. The software, collections, marketing and staffing firms that serve them are ordinary businesses that file federal returns and collect sales tax on taxable services sold in South Dakota.
Minnesota and Iowa Filings
Minnesota and Iowa are each within roughly 15 miles of Sioux Falls, and the Census Bureau's Sioux Falls metropolitan area now includes Rock County, Minnesota. A Sioux Falls company that sends crews to jobs in Luverne or northwest Iowa, keeps inventory across the line, or has employees working from homes in those states can owe Minnesota or Iowa returns, both of which tax business income. Pass-through owners may then owe nonresident individual returns in those states too. We review where work is done, where property and staff are, and where sales are delivered each year, and we prepare the out-of-state returns with the federal return.
Reconciling Sioux Falls Taxes to the Return
Sales in Sioux Falls carry the 4.2 percent state tax plus the city's 2 percent municipal tax. Restaurants, bars, hotels and venues also collect the city's 1 percent municipal gross receipts tax, and hotels add more lodging taxes. Tax collected from customers is not income, but it runs through the books, and the gross receipts on the state returns should tie to revenue on the federal return. Each year we reconcile the two and explain the differences before the return is filed.
Federal Items We Review Every Year
- Bonus depreciation, which is a permanent 100 percent deduction for qualified property acquired after January 19, 2025, and Section 179 expensing up to $2,500,000.
- Owner salaries in S corporations, which should be reasonable for the work performed.
- Shareholder and partner loans, distributions and basis.
- Forms 1099 for contractors and landlords, and the payment-platform reporting threshold of $20,000 and 200 transactions.
- Deadlines: March 15 for calendar-year S corporations and partnerships, April 15 for C corporations, with extensions on Form 7004.
Local Licensing Alongside the Return
Sioux Falls does not require a general business license, but the city licenses specific trades and activities under Chapter 110 of its code. That includes electrical, mechanical and HVAC, plumbing, refrigeration, fireplace and sign contractors, as well as peddlers and mobile food vendors. These licences do not change the federal return, but they are part of a Sioux Falls company's yearly compliance calendar, along with the Secretary of State annual report, and we keep them on the same calendar.
Sioux Falls Business Tax Preparation Questions
Do Sioux Falls businesses file a city or state income tax return?
No. Neither Sioux Falls nor South Dakota taxes business income. A Sioux Falls business files a federal return, any Minnesota or Iowa returns its activity requires, and its South Dakota sales and payroll filings.
Does Sioux Falls require a general business license?
No, but the city licenses specific trades and activities under Chapter 110 of its code, including electrical, mechanical, plumbing and sign contractors, peddlers and mobile food vendors.
When does a Sioux Falls company owe Minnesota or Iowa tax?
When it has enough activity there, such as crews working jobs, employees or inventory in the state, or sales delivered there. Pass-through owners may then owe nonresident returns in that state.
Can you prepare returns for medical and dental practices?
Yes. We prepare S corporation and partnership returns for Sioux Falls practices, covering owner pay, retirement plans and equipment depreciation, and we check that product sales are taxed correctly.
Talk to BOMCAS About Business Tax Preparation in Sioux Falls
Most Sioux Falls companies that use us for the return also keep their books and payroll with us, which makes the year-end reconciliation quick. Owners file their personal returns at the same time, and we review the coming year in tax planning. Retailers and service firms should have their Sioux Falls sales tax in order first, businesses with missed years can begin with catching up on late filings, and Canadian owners will find the treaty side in cross-border tax. The statewide rules behind the rest of our work are explained on our South Dakota pages for personal tax preparation, sales and use tax, bookkeeping, payroll, tax planning, back taxes and late filing and cross-border tax, and the South Dakota overview brings them together.
Send us a short note about your Sioux Falls situation and we will come back with next steps. Reach us through the BOMCAS contact page or the form below, call 780-667-5250 or email info@bomcas.ca. You can also return to the Sioux Falls overview. Nothing on this page is advice for your specific circumstances.