What It Costs to Form and Run a South Dakota Corporation

The unavoidable cost to bring a South Dakota corporation into existence is the state filing fee for the Articles of Incorporation, paid to the Secretary of State when you file. The current amount is shown on the receipt card on this page and on the state's official fee schedule.

What the filing fee covers

That single fee records your Articles of Incorporation and brings the corporation onto the state's books. It's a flat fee — it doesn't scale with your revenue, your number of shareholders, or how many shares you authorize. Paying it gets you a stamped, filed formation document and a corporation that legally exists.

Online vs. paper

South Dakota lets you file online or by mail. Online filing is faster — usually processed the same or next business day — and is the standard path. Paper filing by mail takes one to two weeks. The filing method affects speed more than anything, so online is generally the better choice unless you have a specific reason to mail.

Forming the corporation is a one-time expense. Keeping it alive and in good standing is where the ongoing costs live, and they're the ones people forget to budget for.

The annual report

South Dakota requires each corporation to file an annual report with the Secretary of State every year to stay in good standing. The report carries a state fee, shown on the fee schedule, and is due around your anniversary month. It's not a financial disclosure — it updates your registered agent, addresses, and officer or director information.

Late fees

Missing the annual report deadline triggers a late fee on top of the regular report fee, and continued non-filing eventually leads the state to administratively dissolve the corporation. Reinstating a dissolved corporation costs more and takes more effort than simply filing on time — so the cheapest strategy is never being late.

Registered agent

If you use a commercial registered agent service, that's a recurring annual cost. If you serve as your own agent, there's no fee, but you take on the obligation of being available during business hours and having your address in the public record. Most owners who value privacy and reliability treat the commercial agent fee as worthwhile.

Beyond the mandatory filing and annual report, several costs may or may not apply depending on your plans.

Name reservation

If you want to lock in a corporate name before you're ready to file, South Dakota lets you reserve an available name for a limited period for a small fee. This is optional — most people simply file when their name clears the search.

Assumed or fictitious name (DBA)

If your corporation operates under a name different from its legal name, you register that assumed name — at the state level through the Secretary of State, or at the county Register of Deeds, depending on your situation. A county DBA registration carries its own fee and renews on a multi-year cycle. This applies only if you use a trade name.

Foreign qualification

If your corporation was formed in another state and you're registering to do business in South Dakota, the Certificate of Authority carries its own filing fee, plus the cost of obtaining a good-standing certificate from your home state. This applies only to out-of-state corporations.

Amendments and certified copies

Amending your Articles of Incorporation later — to change the corporate name, adjust authorized shares, or update other details — carries a filing fee. Certified copies of your documents, which banks or courts sometimes request, also cost a modest amount. These are pay-as-you-need items, not upfront costs.

Some of the real costs of running a corporation don't go to the Secretary of State at all, and it's worth accounting for them so your budget is honest.

Federal EIN

An EIN from the IRS is free. Any service charging a standalone fee just to get you an EIN is charging for form-filling you can do yourself in about ten minutes at IRS.gov. It's still handy to have it bundled into a formation package, but the EIN itself costs nothing.

Professional help

A corporation's structure invites professional support: an attorney to draft bylaws and shareholder agreements or advise on equity, and a CPA to handle federal returns and any state tax obligations. These aren't state fees, and they're optional, but they're real costs of doing the corporate form right — especially if you're raising money or issuing equity.

Banking and operations

A corporate bank account may carry monthly fees or minimum-balance requirements. Depending on your industry, you may also owe for state or local business licenses, permits, and sales-tax registration. None of these are incorporation fees, but they're part of the true cost of operating.

When you form your corporation through Mainstay Filing, our order page shows exactly what you're paying and separates our service fee from the state's fees. The amount displayed is the amount charged — no surprise add-ons at the end.

Our formation service prepares and files your Articles of Incorporation, includes registered agent service so your personal address stays off the public record, and gets you your stamped formation document once the state processes it. We also track your annual report deadline and can file it for you so you don't risk a late fee or dissolution.

Transparency on state fees

State fees are set by South Dakota, not by us, and they can change. The receipt card on this page reflects the current amounts. We pass state fees through as they are — you always see the state's cost and our cost as separate lines, so you know precisely where every dollar goes.