You determine LLC ownership percentages by agreement among the members — there’s no formula fixed by Arizona law. In practice, percentages usually track each member’s capital contribution (the cash, property, or services they put in), adjusted for things like ongoing role and personal risk. Whatever the members agree to becomes binding once it’s written into the operating agreement.
A simple starting point: total everyone’s contributions, then divide each member’s contribution by that total. If three people contribute $60,000, $30,000, and $10,000, the contribution-based split is 60% / 30% / 10%. But contributions aren’t only cash — a member who brings equipment, intellectual property, key relationships, or full-time labor (“sweat equity”) can be credited too. The members decide what each contribution is worth.
The Arizona default you need to know
Here’s the part that catches Arizona owners off guard: if you don’t set percentages in a written operating agreement, Arizona law doesn’t split profits by contribution — it splits them equally, per member (A.R.S. § 29-3404). So if you put in $90,000 and your partner put in $10,000 with nothing in writing, you’d each receive 50% of distributions by default. The only way to make ownership match contributions is to write it down.
Factors members commonly weigh
- Capital contributed — cash and the agreed value of property or services.
- Sweat equity — time, expertise, and work going forward (note: this can be taxable when granted — ask your CPA).
- Risk — who personally guarantees the lease or the loan.
- Role — full-time operator vs. passive investor.
Ownership, profit, and control can differ
Ownership percentage doesn’t have to equal profit share or voting power. An Arizona operating agreement can set each one separately — for example, a member who owns 50% might receive 70% of distributions until their extra capital is repaid, or an investor might get economic rights with no voting power. That flexibility is one of the biggest advantages of the LLC structure.
Related questions
Can ownership percentages change later? Yes — members can amend the operating agreement, or use vesting so ownership is earned over time rather than granted all at once.
What about a single-member LLC? One owner holds 100% by default — there’s nothing to split.
Getting these percentages right — and coordinated with your estate plan — is exactly what we do. Explore our Arizona business law services, read our deeper guide on how LLC ownership works, or book a free consultation or call (480) 805-4357.
This is general legal information about Arizona law, not legal or tax advice, and does not create an attorney-client relationship.
