Is an operating agreement required for South Dakota LLCs?

No, South Dakota doesn't legally require LLCs to have an operating agreement under SDCL 47-34A (the South Dakota Limited Liability Company Act). However, creating one is strongly recommended because without it, your LLC defaults to South Dakota's statutory operating rules, which may not align with your business intentions. An operating agreement protects your limited liability status by demonstrating that your LLC is a legitimate separate entity, critical if a creditor sues and the court examines your formalities. Without one, courts may be more likely to pierce the corporate veil and hold you personally liable. Additionally, an operating agreement clarifies member voting rights, profit distribution percentages, decision-making authority, and buyout procedures. This prevents costly disputes if members disagree on major decisions or want to exit the business. The practical implication: you remain personally exposed to liability claims and operational conflicts without this document. Next step: draft an operating agreement using South Dakota's LLC template or consult a business attorney to customize one for your specific member structure and profit-sharing arrangement.

Can I write my own South Dakota LLC operating agreement?

Yes, you can draft your own South Dakota LLC operating agreement without hiring an attorney, since South Dakota law (SDCL 47-34A) doesn't mandate a written operating agreement or specify required provisions. However, this approach carries significant risk. South Dakota's default LLC statutes will govern your business if your agreement omits critical sections, meaning the state decides profit distribution, management authority, and dissolution procedures rather than you. Your custom agreement must address member voting rights, capital contributions, buyout procedures, and dispute resolution to avoid costly conflicts. The South Dakota Secretary of State's office doesn't provide official templates, so you'll need to reference SDCL 47-34A or use a reputable template that incorporates state-specific language. Without proper documentation, you may face unexpected tax consequences or liability exposure. Download a South Dakota-compliant operating agreement template today and review it against your specific business structure before having members sign.

Does my South Dakota LLC operating agreement need to be notarized?

No, South Dakota doesn't require LLC operating agreements to be notarized under SDCL 47-34A (South Dakota Codified Laws). The state's LLC statute doesn't mandate notarization for operating agreements to be legally valid or enforceable. However, notarization carries practical benefits for South Dakota LLC owners. A notarized agreement strengthens your document's credibility if disputes arise in court, as notarization creates a presumption that signatories executed the document willingly. Banks and lenders may also view a notarized agreement more favorably when you need financing or credit. Additionally, notarization establishes a clear date and witness record, which can protect against future claims that the agreement was altered or signed under duress. The cost is minimal. South Dakota notaries typically charge $5 to $15 per signature. To proceed, visit your bank, local courthouse, or use an online notary service. Ensure all LLC members sign the agreement before a notary public to maximize its legal standing and avoid potential disputes later.

What happens if my South Dakota LLC doesn't have an operating agreement?

Without an operating agreement, your South Dakota LLC is governed entirely by South Dakota Codified Laws Chapter 47-34A, which imposes rigid default rules that may not align with your business needs. Specifically, the state assumes equal profit and loss distribution among members regardless of capital contributions, equal voting rights on all decisions, and that any member can bind the entire LLC to contracts without consent. This creates significant liability exposure. Creditors can pursue all members' personal assets if the LLC structure isn't properly documented. Additionally, without written operating agreement provisions, member disputes over management decisions, buyout terms, or dissolutions typically require costly litigation under state statute rather than being resolved through agreed-upon procedures. The South Dakota Secretary of State doesn't require operating agreements for LLC formation, but the absence of one means you forfeit customization rights, making your LLC vulnerable to disagreements and unexpected tax consequences. Your immediate next step is to have a South Dakota business attorney draft or customize an operating agreement that clearly defines member roles, capital contributions, profit distribution percentages, and decision-making authority specific to your situation.

Can I amend my South Dakota LLC operating agreement after formation?

Yes, you can amend your South Dakota LLC operating agreement at any time after formation by following the procedures specified in your original agreement. Most South Dakota operating agreements require either unanimous consent from all members or a majority vote, depending on what you established during formation. However, South Dakota law (SDCL 47-34A) doesn't mandate a specific amendment process, meaning your agreement's terms control. If your agreement is silent on amendments, you'll need unanimous member approval to modify it. Importantly, amendments to your operating agreement don't require filing with the South Dakota Secretary of State. They remain internal documents. This gives you flexibility to update provisions covering profit distribution, management authority, or member roles without state filings or fees. If your amendment affects your federal tax classification or member ownership percentages, you may need to file Form 8832 with the IRS. Document all amendments in writing and have members sign them to maintain enforceability and avoid future disputes about when changes took effect. Review your current operating agreement's amendment clause today to confirm your exact voting threshold.

LLC Guide

South Dakota LLC Operating Agreement: Essential Guide + Free Template

Protect your LLC with a comprehensive operating agreement that meets South Dakota requirements and safeguards your business interests.

By Edmond Hui · Last updated: June 2026

South Dakota does not legally require an LLC operating agreement, but having one protects your limited liability status and sets the rules for ownership and profits. See exactly what to include below.

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Key sections of a South Dakota LLC operating agreement, listing the 7 provisions the document should cover. — What a South Dakota operating agreement should contain, section by section. Source: South Dakota Secretary of State.

State Requirements

Required By Law	no
Must Be Filed	no
Special Rules	None beyond standard requirements

What to Include in Your Operating Agreement

Ownership & membership

Define each member's ownership percentage, capital contributions, and membership interests. This section establishes the foundation of your LLC's ownership structure and prevents future disputes.

Management structure

Specify whether your LLC is member-managed or manager-managed and outline decision-making authority. Clear management roles prevent confusion and ensure smooth daily operations.

Voting rights

Establish voting procedures, quorum requirements, and which decisions require member approval. This protects minority members and ensures democratic decision-making for important business matters.

Profit/loss allocation

Detail how profits, losses, and distributions will be allocated among members. This section should align with your tax strategy and member expectations for returns on investment.

Member duties

Define each member's responsibilities, time commitments, and fiduciary duties to the LLC. Clear expectations prevent misunderstandings and ensure all members contribute appropriately.

Dissolution process

Outline procedures for voluntary dissolution, member withdrawal, and asset distribution. Planning for these scenarios protects your investment and ensures orderly business wind-down when necessary.

Amendment procedures

Establish requirements for modifying the operating agreement, including voting thresholds and documentation. This flexibility allows your agreement to evolve with your changing business needs.

Frequently Asked Questions

: No, South Dakota doesn't legally require LLCs to have an operating agreement under SDCL 47-34A (the South Dakota Limited Liability Company Act). However, creating one is strongly recommended because without it, your LLC defaults to South Dakota's statutory operating rules, which may not align with your business intentions. An operating agreement protects your limited liability status by demonstrating that your LLC is a legitimate separate entity, critical if a creditor sues and the court examines your formalities. Without one, courts may be more likely to pierce the corporate veil and hold you personally liable. Additionally, an operating agreement clarifies member voting rights, profit distribution percentages, decision-making authority, and buyout procedures. This prevents costly disputes if members disagree on major decisions or want to exit the business. The practical implication: you remain personally exposed to liability claims and operational conflicts without this document. Next step: draft an operating agreement using South Dakota's LLC template or consult a business attorney to customize one for your specific member structure and profit-sharing arrangement.
: Yes, you can draft your own South Dakota LLC operating agreement without hiring an attorney, since South Dakota law (SDCL 47-34A) doesn't mandate a written operating agreement or specify required provisions. However, this approach carries significant risk. South Dakota's default LLC statutes will govern your business if your agreement omits critical sections, meaning the state decides profit distribution, management authority, and dissolution procedures rather than you. Your custom agreement must address member voting rights, capital contributions, buyout procedures, and dispute resolution to avoid costly conflicts. The South Dakota Secretary of State's office doesn't provide official templates, so you'll need to reference SDCL 47-34A or use a reputable template that incorporates state-specific language. Without proper documentation, you may face unexpected tax consequences or liability exposure. Download a South Dakota-compliant operating agreement template today and review it against your specific business structure before having members sign.
: No, South Dakota doesn't require LLC operating agreements to be notarized under SDCL 47-34A (South Dakota Codified Laws). The state's LLC statute doesn't mandate notarization for operating agreements to be legally valid or enforceable. However, notarization carries practical benefits for South Dakota LLC owners. A notarized agreement strengthens your document's credibility if disputes arise in court, as notarization creates a presumption that signatories executed the document willingly. Banks and lenders may also view a notarized agreement more favorably when you need financing or credit. Additionally, notarization establishes a clear date and witness record, which can protect against future claims that the agreement was altered or signed under duress. The cost is minimal. South Dakota notaries typically charge $5 to $15 per signature. To proceed, visit your bank, local courthouse, or use an online notary service. Ensure all LLC members sign the agreement before a notary public to maximize its legal standing and avoid potential disputes later.
: Without an operating agreement, your South Dakota LLC is governed entirely by South Dakota Codified Laws Chapter 47-34A, which imposes rigid default rules that may not align with your business needs. Specifically, the state assumes equal profit and loss distribution among members regardless of capital contributions, equal voting rights on all decisions, and that any member can bind the entire LLC to contracts without consent. This creates significant liability exposure. Creditors can pursue all members' personal assets if the LLC structure isn't properly documented. Additionally, without written operating agreement provisions, member disputes over management decisions, buyout terms, or dissolutions typically require costly litigation under state statute rather than being resolved through agreed-upon procedures. The South Dakota Secretary of State doesn't require operating agreements for LLC formation, but the absence of one means you forfeit customization rights, making your LLC vulnerable to disagreements and unexpected tax consequences. Your immediate next step is to have a South Dakota business attorney draft or customize an operating agreement that clearly defines member roles, capital contributions, profit distribution percentages, and decision-making authority specific to your situation.
: Yes, you can amend your South Dakota LLC operating agreement at any time after formation by following the procedures specified in your original agreement. Most South Dakota operating agreements require either unanimous consent from all members or a majority vote, depending on what you established during formation. However, South Dakota law (SDCL 47-34A) doesn't mandate a specific amendment process, meaning your agreement's terms control. If your agreement is silent on amendments, you'll need unanimous member approval to modify it. Importantly, amendments to your operating agreement don't require filing with the South Dakota Secretary of State. They remain internal documents. This gives you flexibility to update provisions covering profit distribution, management authority, or member roles without state filings or fees. If your amendment affects your federal tax classification or member ownership percentages, you may need to file Form 8832 with the IRS. Document all amendments in writing and have members sign them to maintain enforceability and avoid future disputes about when changes took effect. Review your current operating agreement's amendment clause today to confirm your exact voting threshold.

Sources

Each entry below is a document recorded in our verified South Dakota sources, and each entry says what the document is. Some statutory text is read from an accurate mirror rather than from the state's own host, and those say so.

sdsos.gov/business-services/corporations/default.aspxSouth Dakota Secretary of State: business entity filings

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Edmond Hui · Founder, MyStateLLC

Edmond Hui is a software engineer and serial entrepreneur based in New York who has founded multiple online businesses across e-commerce, media, and information publishing. Before transitioning into tech, he spent years as a commercial real estate professional closing deals totaling over 100,000 square feet, giving him firsthand experience with business formation and entity structuring. He built MyStateLLC to provide the free, state-specific LLC guidance he wished existed when forming his own companies.

State Requirements

What to Include in Your Operating Agreement

Ownership & membership

Management structure

Voting rights

Profit/loss allocation

Member duties

Dissolution process

Amendment procedures

Frequently Asked Questions

Sources

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