Payroll With Big Summer Swings
Many Rapid City employers double their headcount between May and September and then cut back for the winter. Others run crews on federal construction projects at Ellsworth Air Force Base, or send workers into Wyoming for weeks at a time. South Dakota has no state income tax to withhold, which simplifies part of the job, but seasonal hiring, tips, international summer workers, federal wage rules and Wyoming's insurance system all add work. BOMCAS runs payroll for Rapid City employers remotely and handles the federal and state filings that come with it.
Unemployment insurance, new-hire reporting and minimum wage rules are statewide and are covered in South Dakota payroll. This page deals with what Rapid City employers face on top of them.
The South Dakota Basics
- No state income tax withholding for work performed in South Dakota.
- Reemployment assistance (unemployment insurance) contributions and quarterly reports to the South Dakota Department of Labor and Regulation.
- New-hire reports for every new or rehired employee, which matter in a seasonal business that rehires the same people each spring.
- Workers' compensation coverage through a private insurer or approved self-insurance.
- South Dakota's minimum wage, which is adjusted each January, and a tipped cash wage of half the minimum, as long as tips make up the difference.
Seasonal Staff in the Black Hills
Hotels, restaurants, attractions and outfitters around Rapid City, Keystone and Hill City staff up for Memorial Day and wind down after Labor Day. Seasonal payroll means onboarding dozens of people in a few weeks, collecting Forms W-4 and I-9, reporting new hires, and paying final wages promptly when the season ends. Employee housing is common in the Hills, and whether lodging provided to staff is a taxable wage depends on whether it is provided for the employer's convenience on the business premises and required as a condition of employment.
International summer workers
Many Black Hills employers hire students on J-1 Summer Work Travel visas. J-1 students who are nonresident aliens are generally exempt from Social Security and Medicare tax and from federal unemployment tax on wages for work allowed by their visa, but federal income tax is still withheld under the special nonresident rules. Getting their status wrong is a common and costly error, so we check each worker's visa and residency status before the first pay run.
Restaurants, Bars and Tips
Tipped employees must report their tips each month, and the employer withholds income tax and the employee share of Social Security and Medicare on reported tips. Larger restaurants may need to file Form 8027 each year, and food and beverage employers can often claim a federal income tax credit for part of the employer Social Security and Medicare tax paid on tips. The new federal deduction for qualified tips, available for 2025 through 2028, also changes what employers report on W-2s, so we keep tip records organised to support it.
Federal Construction Payroll at Ellsworth
Construction contracts on federal projects such as those at Ellsworth are generally covered by the Davis-Bacon Act. Contractors and subcontractors must pay at least the prevailing wages and fringe benefits set out in the contract's wage determination and submit weekly certified payroll reports. We set up job and craft classifications so that each hour worked on a covered project is paid at the right rate, and we prepare the certified payroll reports from the same payroll data. Service contracts on the base, such as custodial or food service work, may fall under the Service Contract Act instead.
Crews Working in Wyoming
Wyoming has no state income tax, so there is nothing to withhold for Wyoming. The bigger issue is insurance. Wyoming runs a state workers' compensation fund that most employers must use, and an out-of-state employer must register with the Wyoming Department of Workforce Services and obtain coverage before its employees start work there. Nonresident employers are generally asked for an advance premium deposit or a surety bond unless they qualify for an exception. Unemployment insurance follows the employee's work: if an employee works mainly in Wyoming, the wages may be reportable to Wyoming rather than South Dakota. We review your Wyoming jobs before work starts so that coverage is in place.
Montana, North Dakota and Nebraska
Those states do tax wages. A Rapid City employer with employees working in Montana, North Dakota or Nebraska may need to register and withhold there, and the employee may owe a nonresident return. We track where each employee works so withholding follows the rules of each state.
Military Spouses and Civilians
Many Rapid City employers hire military spouses. South Dakota has no tax to withhold, but a spouse whose legal residence is another state may owe tax there and may ask the employer to withhold it voluntarily. We can set that up where the employer is able to do so.
Federal Payroll Duties
- Federal income tax, Social Security and Medicare withholding, with deposits on the IRS schedule.
- Quarterly Form 941 and annual Form 940 for federal unemployment tax.
- Forms W-2 and W-3 each January, and 1099-NEC for contractors.
- Records that support the tip and overtime deductions under the 2025 federal tax law.
What You Receive
Each pay run comes with a payroll register, pay stubs, tax deposit confirmations and, where needed, certified payroll reports. Quarter-end filings and year-end forms are prepared on schedule. You approve each run before it is paid.
Rapid City Payroll Questions
Do Rapid City employers withhold state income tax?
No. South Dakota has no state income tax. Employers withhold federal income tax, Social Security and Medicare, and pay South Dakota unemployment insurance contributions.
Are J-1 summer workers exempt from Social Security tax?
J-1 students who are nonresident aliens are generally exempt from Social Security, Medicare and federal unemployment tax on wages for work allowed by their visa. Federal income tax withholding still applies.
What is certified payroll for Ellsworth projects?
Federal construction contracts covered by the Davis-Bacon Act require contractors to pay prevailing wages and fringe benefits and to submit weekly certified payroll reports showing each worker's hours, classification and pay.
Do I need Wyoming workers' compensation for a job in Gillette?
Most employers need coverage through Wyoming's state fund, and out-of-state employers must register with the Wyoming Department of Workforce Services before employees start work in Wyoming.
Talk to BOMCAS About Payroll in Rapid City
Payroll entries post to the ledger, so most Rapid City payroll clients also use our bookkeeping, and the wage totals flow into the business return. Owners setting their own salary should look at tax planning. Employers with missed quarterly reports can start with back taxes and late filing, staff and owners can have their personal returns prepared here, and employers hiring Canadians should read cross-border tax. Hotels and restaurants also need their sales and tourism tax kept current. For the general South Dakota rules on everything else, our state pages cover business returns, personal returns, sales and use tax, bookkeeping, planning, catching up on late filings and Canada–U.S. tax, with the South Dakota overview tying it all together.
Tell us what is happening in your Rapid City business or household and we will reply with a plan and a quote. Use the BOMCAS contact page or the form at the bottom of this page, phone 780-667-5250 or write to info@bomcas.ca. To see how the pieces fit together, head back to the Rapid City overview. This page gives general information and is not advice on your own situation.