How to Incorporate a Business in South Dakota
Bizee helps entrepreneurs incorporate a business in South Dakota. File your Articles of Incorporation, get an EIN, and stay compliant — starting at $0 + state fee.
Bizee Editorial Staff
Editorial Team
South Dakota at a glance
Filing fee: $150 online / $165 by paper
Processing time: [PROCESSING_TIME]
State agency: South Dakota Secretary of State
Annual report due: Annual report required; due date varies by entity
State tax rate: No state corporate income tax or personal income tax; 4.5% state sales tax
How to incorporate a business in South Dakota
To incorporate a business in South Dakota, you file Articles of Incorporation with the South Dakota Secretary of State, pay the state filing fee ($150 online or $165 by paper), appoint a registered agent with a South Dakota address, and get an Employer Identification Number (EIN) from the IRS. South Dakota's lack of a state corporate income tax makes it one of the more business-friendly states in the country.
Why incorporate in South Dakota
South Dakota doesn't have a state corporate income tax or a personal income tax — that's a real advantage for business owners who want to keep more of what they earn. It also has no franchise tax on corporations, which sets it apart from states like California and Delaware that charge annual minimums regardless of revenue.
The state does have a 4.5% sales tax, and municipalities can add their own rates on top of that — bringing the total as high as 6.5% depending on where your business operates. Businesses with employees also need to register for unemployment insurance tax with the South Dakota Department of Labor and Regulation. South Dakota's tax structure is straightforward compared to most states, which makes compliance planning easier from the start.
C Corp vs. S Corp: which is right for you
Both a C Corp and an S Corp give you liability protection — your personal finances stay separate from business debts. The difference comes down to how each is taxed and who can own shares.
C Corp: taxed as its own entity. The corporation pays federal corporate income tax, and shareholders pay tax again on dividends. This double taxation is a trade-off for unlimited shareholders, multiple stock classes, and easier access to outside investment.
S Corp: profits and losses pass through to shareholders' personal tax returns, avoiding double taxation. The catch: you're limited to 100 shareholders, all of whom need to be U.S. citizens or residents, and you can only have one class of stock. S Corp owners who work in the business must pay themselves a reasonable salary as a W-2 employee.
South Dakota's no-income-tax environment means neither structure triggers state income tax on corporate profits or owner distributions — a meaningful advantage over most states.
A tax professional can help you figure out which structure fits your ownership goals and long-term plans before you file.
LLC vs. corporation in South Dakota
An LLC is usually the better fit for smaller businesses or solo founders. It's less paperwork, fewer formalities, and the same core liability protection. A corporation makes more sense if you plan to raise outside investment, issue stock to employees, or eventually go public.
Both entity types protect your personal assets from business liabilities. Without that protection — if you're running as a sole proprietor, for example — your personal finances are fair game if the business gets sued or can't pay its debts. Choosing the right structure early is one of the most consequential decisions you'll make.
How to incorporate in South Dakota: step by step
The South Dakota Secretary of State handles all business entity filings. Here's what the process looks like from start to finish.
Check name availability: search the South Dakota Secretary of State's business database to confirm your corporation name isn't already taken. The name must include "Corporation," "Incorporated," "Company," or an abbreviation like "Corp." or "Inc."
Appoint a registered agent: your corporation needs a registered agent with a physical South Dakota address — not a P.O. box — to receive legal documents on behalf of the business.
File Articles of Incorporation: submit your Articles of Incorporation to the South Dakota Secretary of State. The filing fee is $150 online or $165 by paper form.
Get an EIN: apply for an Employer Identification Number (EIN) through the IRS at irs.gov/ein. You'll need it to open a business bank account, hire employees, and file taxes.
Create corporate bylaws: bylaws aren't filed with the state, but they govern how your corporation operates — board structure, voting rights, officer roles. Keep them on file with your corporate records.
Hold an organizational meeting: elect officers, adopt bylaws, and issue initial shares. Document everything in your corporate minutes.
Register for state taxes: if your business collects sales tax or has employees, register with the South Dakota Department of Revenue and the Department of Labor and Regulation.
South Dakota taxes and ongoing requirements
South Dakota has no state corporate income tax and no personal income tax — that's the headline. But there are still tax obligations to stay on top of depending on what your business does.
Sales tax: South Dakota's state sales tax rate is 4.5%. Municipal taxes can bring the combined rate up to 6.5%. If your business sells taxable goods or services, you need to register with the Department of Revenue and file sales tax returns.
Contractors' excise tax: construction contractors doing business in South Dakota pay an excise tax on gross receipts from construction projects. Register with the Department of Revenue before starting work.
Unemployment insurance tax: businesses with employees register with the South Dakota Department of Labor and Regulation for unemployment insurance tax.
Local licenses: some municipalities and counties require local business licenses. Check with your city or county government to confirm what applies to your location.
Annual report: South Dakota corporations file an annual report with the Secretary of State to stay in good standing. Missing the deadline can put your corporation's status at risk.
South Dakota's tax structure is genuinely simpler than most states, but "no income tax" doesn't mean no tax obligations. Register for the taxes that apply to your business before you start operating.
FAQ
The state filing fee is $150 if you file online through the South Dakota Secretary of State's portal, or $165 if you file by paper form. That fee covers your Articles of Incorporation. You may also have costs for a registered agent, an EIN (free from the IRS), and any local business licenses depending on your location.
You form a standard corporation in South Dakota first — file Articles of Incorporation with the Secretary of State and pay the $150 online filing fee. Then you elect S Corp tax status with the IRS by filing Form 2553. The S Corp election is a federal tax choice, not a separate state filing. South Dakota doesn't impose a state income tax, so the S Corp election primarily affects your federal tax treatment.
At the state level, an S Corp in South Dakota files Articles of Incorporation with the Secretary of State and submits an annual report to stay in good standing. At the federal level, S Corps file Form 1120-S each year and issue Schedule K-1s to shareholders. S Corp owners who work in the business must pay themselves a reasonable W-2 salary. South Dakota has no state income tax return requirement for S Corps.
Yes. An EIN is a 9-digit tax ID number the IRS uses to identify your business — similar to a Social Security number, but for your corporation. You need an EIN to open a business bank account, hire employees, file federal tax returns, and handle payroll. Apply for an EIN for free at irs.gov/ein. Most corporations get their EIN within minutes when applying online.
To dissolve a corporation in South Dakota, you file Articles of Dissolution with the South Dakota Secretary of State. Before filing, the corporation's board and shareholders need to approve the dissolution, and you'll need to settle any outstanding debts, close accounts, and cancel licenses or permits. The Secretary of State's office has the dissolution forms and current fee information on its website.
An LLC in South Dakota gives you liability protection with fewer formalities than a corporation — no board meetings, no required bylaws, and simpler ongoing compliance. Profits pass through to your personal tax return, and South Dakota's no-income-tax environment means no state tax on those earnings either. For most small business owners and solo founders, an LLC is the faster and more flexible starting point. A corporation makes more sense if you plan to raise investment or issue stock.
