The Partnership Agreement for a South Dakota LLP

The partnership agreement is the internal contract among the partners of an LLP. It is the LLP counterpart to an LLC's operating agreement, and it governs the relationship the state's registration does not touch: who owns what, who decides what, how money moves, and what happens when a partner joins or leaves. South Dakota does not require you to file this agreement, and it never becomes part of the public record — it is a private document that lives with the partners.

Why it is not optional in practice

South Dakota's Uniform Partnership Act supplies default rules for any question a partnership leaves unanswered. Those defaults are a safety net, not a business plan — they are generic and often do not reflect what a specific group of partners actually wants. Without a written agreement, those statutory defaults govern everything: how profits split, how decisions get made, what a departing partner is owed. A written partnership agreement replaces the defaults you don't want with the terms you do, and it is the single most important document for preventing disputes among partners.

Written beats oral

A handshake understanding among partners is technically a partnership, but it is a recipe for conflict. Memories diverge, circumstances change, and when real money or a partner's exit is on the line, "what we agreed" becomes contested. A written agreement is the reference everyone can point to, and it is worth putting in place before the business gets busy.

The feature that separates an LLP from a plain general partnership is the liability shield, and the partnership agreement should be written with that shield in mind.

What the shield does

In a general partnership, every partner is personally liable for the debts and wrongful acts of the business and of the other partners — exposure that is joint and unlimited. Registering as an LLP with the South Dakota Secretary of State adds a shield that protects each partner from personal liability for the negligence, misconduct, and obligations attributable to the other partners. It does not shield a partner from their own wrongdoing, and it does not erase liabilities a partner personally guarantees. It walls off the risk that flows purely from being someone's business partner.

How the agreement supports the shield

The partnership agreement should reinforce the LLP structure rather than undercut it. That means addressing indemnification among partners, clarifying which obligations are the partnership's versus an individual partner's, and setting expectations that keep the partnership operating as a genuine, properly maintained entity. Just as an LLC's owners protect their veil by respecting separateness, an LLP's partners protect their shield by running the partnership as the distinct, registered entity it is — with its own accounts, records, and clean lines between partnership and personal affairs.

A thorough agreement anticipates the moments when partners might otherwise disagree and settles them in advance. The core provisions include:

• Partners and ownership interests: who the partners are and each partner's percentage or capital interest in the partnership.
• Capital contributions: what each partner contributed at the outset — cash, property, or services — and any obligation to contribute more later.
• Profit and loss allocation: how profits and losses are shared among the partners. This does not have to track ownership percentages, though it often does.
• Draws and distributions: when and how partners take money out, and in what priority.
• Management and authority: who runs the day-to-day business, what any partner can commit the partnership to alone, and which decisions require a vote.
• Voting: whether votes are weighted by interest, taken per partner, or handled some other way, and what threshold major decisions require.
• Admitting new partners: the process and approval needed to bring someone in.
• Departure, retirement, and death of a partner: buyout terms, valuation methods, and whether the partnership continues or winds up when a partner leaves.
• Dispute resolution: how disagreements among partners are resolved before they reach litigation.
• Dissolution and wind-up: the circumstances that end the partnership and how remaining assets are distributed.

LLPs are common among licensed professionals — law firms, accounting and CPA practices, medical and dental groups, engineering and architecture firms — and for those practices the partnership agreement carries extra weight.

Client work and compensation

Professional practices live or die on how they handle client relationships and how they compensate partners for bringing in and doing the work. The agreement is where you define compensation formulas, origination credit, and how client matters and files are handled — including what happens to a client relationship when the partner who owns it departs. Leaving these to the statutory defaults, which know nothing about professional practice, invites exactly the disputes that break up firms.

Departures in a licensed practice

When a partner in a professional firm leaves, the stakes are higher than in a typical business: there are clients to transition, ethical obligations to honor, and sometimes non-compete or non-solicit considerations shaped by professional rules. A well-drafted agreement anticipates the departure, sets the buyout terms, and provides an orderly path — protecting both the departing partner and the firm.

Coordinating with professional rules

A professional LLP's agreement has to sit comfortably alongside the rules of the partners' licensing boards, which may govern firm ownership, naming, and how the practice is organized. This is a strong reason to have the agreement drafted or reviewed by an attorney familiar with your profession, rather than adapting a generic template.

The right time to adopt a partnership agreement is at the start — before the business gets busy and before any money or client work is at stake. Practically, that means drafting and signing it around the time you register the LLP with the Secretary of State, so the partnership begins operating under agreed terms rather than under defaults.

Draft it deliberately

Because the agreement governs ownership, money, and departures, it deserves real thought rather than a fill-in-the-blank template. For a multi-partner professional practice, having an attorney draft or review it is money well spent — the cost of good drafting is trivial next to the cost of a partnership dispute that a clear agreement would have prevented.

Where Mainstay Filing fits

Mainstay Filing handles the state-facing side — registering your LLP with the South Dakota Secretary of State and, if you choose, serving as your registered agent. The partnership agreement itself is a legal document whose terms are between the partners and their attorney; we do not draft it or advise on its contents, because that is legal work. What we do is get your LLP properly registered so that the entity your agreement governs actually exists on the state's records, cleanly and on time.