Running a business with a partner —
structure it right from the start.
Whether you're building with your spouse, a friend, or a business partner — how you structure the relationship legally and financially determines everything. The conversations you have before things get complicated protect the relationship when they do.
Form 1065Partnership tax return
K-1Each partner's tax form
Mar 15Partnership return deadline
SpousesHave a simpler filing option
A multi-member LLC is automatically taxed as a partnership by the IRS — no election needed. This means the LLC itself doesn't pay income tax. Instead, profits and losses pass through to each member who reports their share on their personal tax return via a Schedule K-1.
Your options when building with a partner
1
Multi-member LLC (most common)
Two or more owners form a single LLC. Automatically taxed as a partnership. Each member's ownership percentage, profit share, and responsibilities are defined in the operating agreement. Provides liability protection for all members. Most flexible structure for most partnerships.
Best for most founder partnerships
2
S-Corporation with multiple shareholders
Multiple owners can elect S-Corp status. Each shareholder must be paid a reasonable salary if they work in the business. Distributions on top of salary avoid self-employment tax. Maximum 100 shareholders, all must be US citizens or residents. Requires more structure than an LLC.
Best when profit is high enough to justify payroll complexity
3
General Partnership (avoid this)
Two or more people doing business together without forming an entity. No liability protection — each partner is personally liable for ALL business debts and actions of the other partner. Simple to form accidentally, devastating to be in. Always form an LLC instead.
Never do this — always form an LLC instead
Pass-through
How partnership income is taxed
Profits and losses flow to each partner's personal return — no entity-level tax
Mar 15
Partnership return deadline
Form 1065 due March 15 — one month before personal returns so partners get their K-1s first
K-1
Each partner's tax form
Like a W-2 but for partnership income — shows each partner's share of profit, loss, and deductions
SE tax
Self-employment tax
General partners pay SE tax on their share of partnership income — same as sole props
The #1 partnership mistake: starting a business with someone on a handshake. When things are going well, everyone agrees on everything. When revenue drops, roles shift, or someone wants out — a handshake is worthless. A proper operating agreement costs $500–$1,500 with an attorney and is worth every penny.
Running a business with your spouse — your options
Married couples who run a business together have more tax filing options than other partnerships — and some that are significantly simpler. Here's everything you need to know.
Option 1 — Qualified Joint Venture (simplest)
If you and your spouse both materially participate in the business and file a joint federal tax return, you can elect Qualified Joint Venture status. This lets you skip Form 1065 entirely and file two separate Schedule Cs instead.
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No Form 1065 partnership return requiredEach spouse files their own Schedule C showing their share of business income and expenses. Much simpler than partnership filing — no separate business return, no K-1s, no March 15 deadline.Biggest advantage — saves time and CPA fees
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Each spouse builds their own Social Security recordWhen each spouse files their own Schedule C, each pays self-employment tax on their own income — which builds their individual Social Security and Medicare record. This matters for retirement benefits and disability coverage.
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Each spouse can contribute to their own SEP-IRA or Solo 401kWith separate Schedule Cs, each spouse has their own self-employment income — which means each can make their own retirement contributions. This potentially doubles the household retirement savings and tax deductions.
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Requirements to qualifyMust be legally married. Must both materially participate in the business. Must file a joint federal return (MFJ). Must be the only two members of the LLC. The election is made by simply filing two Schedule Cs — no formal election form required.Only available to married couples filing jointly
Option 2 — Multi-member LLC taxed as Partnership
Treat the business as a standard partnership — file Form 1065, issue K-1s to each spouse, each includes K-1 income on their personal return. More complex but may be preferred in some situations.
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When this makes sense over QJVIf you have complex profit allocation arrangements where one spouse gets a different percentage than the other. If you have investors or plan to add members. If your state doesn't recognize QJV and requires partnership filing. If your CPA recommends it for specific tax planning reasons.
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The downsidesForm 1065 due March 15 — before your personal return. CPA fees are higher. K-1s must be prepared and distributed. More moving parts, more filing deadlines. For most married founders with a simple 50/50 business, QJV is clearly simpler and cheaper.
Option 3 — One spouse owns it, employs the other
One spouse is the sole owner (single-member LLC or sole prop). The other spouse is an employee — receiving a W-2 salary.
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Potential benefit — retirement accountsAn employee spouse can contribute to a 401k through the business — up to $23,000 in 2024. The employer (other spouse) can also make employer matching contributions. This can increase total household retirement savings in some situations.
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Significant downside — FICA taxesPaying your spouse as a W-2 employee triggers full employer FICA (7.65%) on their wages — same as any other employee. In a QJV or partnership, both spouses pay SE tax on their shares but there's no employer match. The FICA cost often outweighs any retirement account benefit.Usually not the best structure — model it carefully first
For most married co-founders: The Qualified Joint Venture election is the simplest, cheapest, and often most tax-efficient option. Two Schedule Cs, two retirement accounts, one joint return. Talk to your CPA about which approach fits your specific situation — especially if profit splits are unequal or if you have employees.
The operating agreement — your most important partnership document
A multi-member LLC operating agreement is the governing document that defines how your partnership works. It protects every member and answers the hard questions before they become hard situations.
Don't start without one. The single biggest legal mistake co-founders make is operating without a written operating agreement. When the business is doing well, everyone agrees on everything. When it's not — or when someone wants to leave, needs cash, or passes away — a handshake agreement is worth nothing in court.
What every partnership operating agreement must cover
1
Ownership percentagesHow much of the LLC does each member own? 50/50 is common but not always right. Ownership determines voting power (unless specified otherwise) and profit allocation (unless the agreement specifies a different split).
2
Profit and loss allocationHow are profits distributed? Can be proportional to ownership or structured differently — e.g., one partner gets a preferred return before profits split. Define when distributions are made (monthly, quarterly, annually) and what approval is needed.
3
Roles and responsibilitiesWho is the managing member? Who handles finances, operations, sales, client relationships? Clear role definition prevents the most common partnership friction — two people trying to make the same decisions, or assuming the other person is handling something.
4
Decision-making and votingWhat decisions require unanimous consent? Simple majority? Which decisions can the managing member make alone? Common categories: day-to-day operations (managing member decides), major purchases over $X (requires approval), adding new members (unanimous), dissolving the LLC (unanimous).
5
Capital contributionsHow much did each member contribute to start the business? What happens if the business needs more capital? Can members be required to contribute more, or is it optional? What if one member can contribute and the other can't?
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What happens if someone wants to leaveThe buyout provision. If a member wants to exit, how is their interest valued? Who can buy them out — the LLC, the other members, or outside parties? Is there a right of first refusal? What price formula applies? This section prevents the most painful partnership disputes.Most important section — negotiate this when you're friends
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What happens if someone dies or becomes incapacitatedDoes their ownership interest transfer to their heirs? Can their spouse become a member? Does the surviving member have the right to buy out the deceased's interest? These provisions protect both the business and each partner's family.
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Non-compete and confidentialityCan a departing member immediately start a competing business? Can they take client lists or proprietary information? Hawaii courts scrutinize non-compete clauses carefully — they must be reasonable in scope and duration. Work with an attorney to draft enforceable language.
Have an attorney draft your operating agreement — don't use a template. A good partnership operating agreement costs $500–$1,500 with a business attorney. A partnership dispute without one costs $10,000–$100,000+. The math is obvious. Use the attorney directory in The Founders Well to find a vetted Hawaii business attorney.
How to split profits — the hard conversations to have early
Profit splitting is where most partnership agreements get it wrong — usually by being too simple. Here are the most common structures and when each one makes sense.
50/50 equal split
The most common — and often the most fraught. Works best when both partners contribute roughly equally in time, capital, and skills. Breaks down when one partner becomes more active, one contributes more capital, or one generates more revenue. Requires unanimous agreement on most decisions — which can create deadlock.
When it works: Two truly equal co-founders who both work full-time in the business with similar contributions. When it doesn't: When one partner is more active, more capitalized, or brings clearly more value than the other.
Proportional to capital contribution
One partner puts in $70,000, the other puts in $30,000 — split is 70/30. Simple and defensible. But ignores sweat equity — the partner who contributes less capital may contribute more time and skill. Consider a hybrid: capital contribution determines initial ownership, but the operating agreement allows adjustments over time.
When it works: When one partner is primarily a financial investor and the other is primarily an operator. When it doesn't: When both partners work equally in the business but one had more cash to contribute initially.
Salary first, then split residual profit
Both partners take a defined salary or guaranteed payment from the business first. Whatever profit remains after salaries is then split by ownership percentage. This compensates each partner for their active work before profit sharing kicks in — fairer when one partner works more hours or has a more critical role.
When it works: When partners contribute different amounts of time or have significantly different market-rate salaries for their roles. When it doesn't: When cash flow is tight and the business can't reliably pay both salaries before distributing profit.
Unequal split with vesting
One partner starts with more ownership but the other partner earns into a larger share over time based on performance, time served, or milestones hit. Common in startup contexts where one founder had the idea and another joins to build it. Requires careful drafting and clear vesting triggers.
When it works: Early-stage businesses where one founder is clearly the originator and another is joining to execute. When it doesn't: When both founders contributed equally from the start — vesting can feel insulting to an equal co-founder.
The conversation most partners avoid: What is each partner's role worth in the market? If you dissolved the LLC tomorrow and both partners went to work for someone else, what would each earn? The gap between those numbers often reveals that a 50/50 split isn't actually fair to either party — and naming that gap early prevents resentment later.
When things change — exits, buyouts, and dissolution
Partnerships end or change for all kinds of reasons — retirement, a better opportunity, disagreement, or success. Having a plan before it happens protects everyone.
Partner exit scenarios
A
One partner wants to sell their interest
Your operating agreement should define a right of first refusal — the remaining members get the option to buy the departing member's interest at the same price before it can be sold to an outside party. This prevents a stranger from becoming your business partner without your consent.
Right of first refusal is essential
B
One partner wants to be bought out
How is the buyout price determined? Common methods: book value (what the LLC's books show), fair market value (what a willing buyer would pay), a multiple of revenue or profit, or a formula agreed in the operating agreement. Agree on the valuation method before anyone wants to leave.
C
Partners can't agree on the direction of the business
Deadlock provisions in your operating agreement define what happens when members can't reach a decision. Options include: mandatory mediation, a buy-sell (one partner names a price, the other chooses to buy or sell at that price), or dissolution. Having a deadlock mechanism prevents court intervention.
Most painful scenario — plan for it anyway
D
A partner dies or becomes incapacitated
Without clear provisions, a deceased partner's interest may pass to their heirs — who could become your new business partner involuntarily. Define whether the surviving members can buy out the deceased's estate, and at what price. Life insurance policies on each partner (cross-purchase) can fund these buyouts.
Dissolving the LLC — if you decide to close
1
Vote to dissolve per your operating agreementMost agreements require a unanimous or supermajority vote to dissolve. Document the vote in writing with signatures from all members.
2
Wind up business affairsComplete outstanding contracts, collect receivables, pay all debts and obligations. The order matters — creditors get paid before members receive any distributions.
3
File Articles of Dissolution with Hawaii DCCAFile online at businessregistrations.ehawaii.gov. Without formal dissolution, Hawaii continues to assess annual fees and the LLC remains legally active — even if you've stopped operating.Must file or fees continue indefinitely
4
File final tax returnsMark both the federal Form 1065 and Hawaii Form N-20 as "final return." File W-2s and 1099s for the final year. Close your Hawaii GET account with DoTax. Cancel your EIN registration with the IRS.
5
Distribute remaining assets to membersAfter all debts are paid, distribute remaining cash and assets to members in proportion to their ownership interests (or as specified in the operating agreement). Document the final distribution in writing.
The most important partnership advice: Have the hard conversations early — when you're excited about the business, optimistic about the future, and genuinely like each other. The operating agreement written in year one by people who trust each other is infinitely better than the one negotiated during a dispute.