South Dakota Contractor Taxes: Excise Tax, Taxed Services and No Income Tax

South Dakota taxes contractors differently from most states. Prime contractors on realty improvement projects owe a 2% contractor's excise tax on gross receipts, and they also pay sales or use tax on materials. Most services, including repair work, are subject to sales tax. South Dakota has no personal or corporate income tax.

What is South Dakota's contractor's excise tax?

It's a tax on a contractor's gross receipts, not on the customer's purchase. The South Dakota Department of Revenue's 2026 sales and use tax guide says it is "imposed on the gross receipts of all prime contractors engaged in construction services or realty improvement projects in South Dakota. The gross receipts include the tax collected from the consumer." The rate is 2%. Few states have anything like it, so contractors moving in from Nebraska, Minnesota or North Dakota need to plan for it.

Subcontractors on non-utility projects are exempt from the excise tax if they hold a prime contractor exemption certificate from the prime. That puts the responsibility on whoever signs the contract with the owner. Get the certificate from your prime before you invoice.

Is labor taxable in South Dakota?

Often, yes, because South Dakota taxes services broadly. The Department of Revenue says sales tax "applies to the gross receipts of all retail sales," and services count. Repair services are taxed where the repaired product is delivered. That's why South Dakota is the go-to example of a state that taxes many services. Realty improvement work is handled through the contractor's excise tax instead, so the key question for any job is: is this a construction or realty improvement contract, or a taxable service?

For how other states draw these lines, see sales tax on labor vs. materials.

Sales tax rate and use tax on materials

South Dakota cut its state rate from 4.5% to 4.2% "on July 1, 2023," and the department notes that HB 1137 "includes a sunset clause which repeals the rate reduction effective June 30, 2027." The July 2026 guide still lists 4.2%. If the Legislature doesn't extend the cut, the rate goes back up in mid-2027, so check with the department before you price longer jobs. Municipalities add a 1–2% municipal sales tax, and the state's GIS rate lookup gives the rate for an address.

Because contractors owe sales or use tax on materials they furnish, buying from out-of-state suppliers that don't collect South Dakota tax means you owe use tax yourself. See use tax for contractors.

South Dakota contractor licensing

Licensing in South Dakota is trade-specific. The State Electrical Commission "licenses all electricians within the state," and the State Plumbing Commission licenses plumbers, sewer and water installers and others. We found no state general contractor license; cities may require their own contractor licenses and building permits, so check locally.

Our contractor license guide explains how state and local licensing fit together.

Does South Dakota have an income tax?

No. The Department of Revenue's guide says "South Dakota does not have a corporate, unitary, or personal income tax." The one business income-type tax is the bank franchise tax, which applies to financial institutions, not trades businesses. You still owe federal income and self-employment tax, so quarterly estimated payments to the IRS still apply; see quarterly estimated taxes for contractors and the quarterly estimated tax calculator.

Workers' comp in South Dakota

South Dakota is unusual here too. The Department of Labor and Regulation says "there is no law in South Dakota requiring any employer to carry workers' compensation insurance." It strongly advises coverage, because an uninsured employer can be sued in civil court by an injured worker. General contractors and commercial customers may also ask for proof of coverage before you start work. Read workers' compensation before deciding to go without.

Local taxes in South Dakota

Cities levy a municipal sales tax of 1–2% on top of the state rate. A separate 1% municipal gross receipts tax applies to alcohol, eating places, lodging and admissions, which rarely touches trades work. Check the rate for each job address.