Missouri at a glance
Partnership law
RUPA (revised)
LLC default split
Proportional to capital
Operating agreement
Required (oral OK)
Community property
No
Formation cost
$50
Annual cost
No annual report fee
Missouri is one of the few states that requires LLCs to have an operating agreement. The state does not charge an annual report fee, keeping ongoing costs low. Missouri follows RUPA for partnerships.
Default partnership rules in Missouri
Missouri adopted RUPA, treating partnerships as separate entities. Profits and losses are shared equally by default. Partners have equal management rights and owe fiduciary duties of loyalty and care.
The most important takeaway: profits are split equally by default in Missouri, regardless of capital contributions. If you and a partner start a business and one of you invests $100,000 while the other invests $5,000, you still split profits 50/50 without a written agreement. This is true in every US state, including Missouri.
LLC defaults in Missouri
Missouri allocates LLC profits and losses in proportion to capital contributions by default. The state requires LLCs to have an operating agreement, though it does not need to be in writing. Missouri does not charge an annual report fee, making ongoing maintenance very affordable. The state imposes an income tax on business income.
Missouri defaults to proportional distributions based on capital contributions, which aligns better with many founders' expectations than equal-split states. However, capital contributions alone rarely tell the full story. A founder contributing time and expertise may receive nothing if they didn't invest cash. An operating agreement can account for all types of contributions. Our equity calculator can help you determine a fair arrangement.
What happens when a partner leaves in Missouri
Under Missouri's RUPA, a partner's departure does not dissolve the partnership. The partnership continues, and the departing partner is entitled to a buyout at fair value.
A written partnership agreement should still address departure terms specifically, including how the buyout value is calculated, the payment timeline, and any non-compete provisions. While RUPA provides a default framework, the details of a buyout can still lead to disputes if not spelled out in advance. Understanding the concept of dead equity is important for managing these situations. Learn more about how dead equity affects businesses.
Marriage and business equity in Missouri
Missouri is an equitable distribution state. Business interests acquired during the marriage are marital property and divided equitably. Missouri courts consider the economic circumstances of each spouse, the contribution of each spouse, the value of marital property, and the conduct of the parties.
Even though Missouri is not a community property state, marriage can still affect your business equity. In equitable distribution states, courts divide marital property based on what is fair, which may include business interests acquired or grown during the marriage. A clear equity agreement and proper documentation of ownership can help protect your business in the event of a divorce.
Formation and cost considerations in Missouri
| Formation cost | $50 |
| Annual/recurring cost | No annual report fee |
| State income tax | Yes |
| Partnership law | RUPA (revised) — partnership continues after departure |
| LLC default distributions | Proportional to capital contribution |
| Operating agreement | Required (oral or written) |
Frequently asked questions
Does Missouri require an operating agreement?
Yes, Missouri is one of the few states that requires LLCs to have an operating agreement. However, it does not need to be in writing, though a written agreement is strongly recommended for enforceability.
How much does a Missouri LLC cost?
Missouri LLC formation costs $50, and there is no annual report fee. This makes Missouri one of the most affordable states for ongoing LLC maintenance.
What is the default LLC profit split in Missouri?
Missouri defaults to proportional allocation based on capital contributions. Members who invested more receive a larger share of profits unless the operating agreement says otherwise.
How do partnerships work in Missouri?
Missouri follows RUPA, which treats partnerships as separate entities, defaults to equal profit sharing, and allows a partner to leave without dissolving the partnership.
Related resources
- Equity calculator: find a fair split for your business
- Does your small business need an equity agreement?
- Equity for small businesses: the complete guide
- Dead equity calculator: how much is yours costing you?
- Slicing Pie calculator
- What is an operating agreement?
- All 50 states: partnership and LLC default rules
Partnership laws in neighboring states
Disclaimer: This page provides general information about Missouri partnership and LLC default rules and is not legal advice. Laws change, and the information here may not reflect the most recent amendments. The formation costs and annual fees listed are approximate and may vary. Consult a qualified attorney licensed in Missouri for advice specific to your situation. Equity Matrix is a software tool for tracking contributions and calculating equity; it does not provide legal services.
Replace Missouri's defaults with a fair agreement.
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