To form a limited liability partnership, you confirm your state allows your type of business to use the structure, choose a compliant name, file a statement of qualification with the Secretary of State, appoint a registered agent, pay the filing fee, and then handle the post-registration essentials: a partnership agreement, an EIN, a dedicated bank account, and any licenses your work requires. The filing itself is usually straightforward. The parts people get wrong are the ones that quietly determine whether the liability shield actually holds up when a creditor or claimant comes calling.
Check Whether Your Business Can Register as an LLP
Not every business qualifies. Some states restrict LLP formation to licensed professions such as law, medicine, accounting, and architecture. Others open the structure to any group of business owners. Before you spend time on paperwork, check your Secretary of State’s website or your state’s partnership statute to confirm your type of business is eligible.
If your state limits LLPs to licensed professionals and your business doesn’t qualify, an LLC gives you comparable liability protection with broader eligibility.
Choose a Name That Meets State Requirements
Every state requires the partnership’s name to include a designation that signals its limited liability status: “Limited Liability Partnership,” “LLP,” or “L.L.P.” This is not a branding preference. It is tied directly to the shield. A partnership that trades under a name missing the designation can be treated by courts as a general partnership, which exposes every partner to full personal liability for business debts.
The name also has to be distinguishable from other registered entities in the state. Run a search in your Secretary of State’s business name database before filing. Most offer a free lookup tool. If your first choice is taken, pick another one before you submit the registration.
File the Statement of Qualification
Formation happens when you file a statement of qualification with your state’s Secretary of State. The document goes by different names in different states — registration statement, certificate of registration — but the substance is the same. Under the model law most states have adopted, it includes:
- The partnership name with the required LLP designation.
- The street address of the principal office.
- The names and addresses of all partners.
- A declaration that the partnership elects limited liability partnership status.
The decision to become an LLP must be approved by a vote of the partners under the terms of your partnership agreement. At least two partners typically sign the filing, and the signers declare under penalty of perjury that the information is accurate.
You also need a registered agent: an individual or company with a physical address in the state who can accept legal documents on the partnership’s behalf. Commercial registered agent services are widely available for a modest annual fee and are the usual choice if no partner wants their home or office address on public record.
Filing fees vary. Some states charge a flat rate, others charge per partner. Most offer online and mail-in filing, with standard processing anywhere from a few business days to several weeks. Expedited review is available in many states for an added fee. Once the state approves the filing, it issues a certificate or receipt confirming the LLP’s legal existence.
Write a Partnership Agreement
The partnership agreement is not filed with the state, and that is probably why so many new partnerships skip it. Doing so is one of the most expensive mistakes you can make. Without an agreement, state default rules fill in every blank — profit splits, management authority, what happens when a partner leaves — and those defaults rarely match what the partners actually wanted.
A workable agreement covers:
- How profits and losses are allocated among partners.
- Each partner’s voting rights and management authority.
- The process for admitting new partners.
- What happens when a partner leaves voluntarily, retires, becomes disabled, or dies.
- How a departing partner’s interest is valued and bought out.
- Whether disputes go to mediation, arbitration, or court.
Pay particular attention to the buyout terms. When a partner exits, the remaining partners need a clear method for valuing and purchasing that interest. Common approaches include the business’s book value (assets minus liabilities), a multiple of earnings, or the present value of projected future distributions. Without those terms in writing, a departure can trigger litigation or force the business to dissolve. Under the older version of the uniform partnership law still in effect in some states, a partner’s withdrawal automatically causes dissolution unless the agreement says otherwise.
Get an EIN and Open a Business Bank Account
Every LLP needs an Employer Identification Number from the IRS to file tax returns, open bank accounts, and hire employees. The application is free, and the IRS warns against third-party sites that charge for it. You can apply at irs.gov and receive the number immediately.1Internal Revenue Service. Get an Employer Identification Number Form the LLP with your state first, because the IRS requires the entity to already exist. You can submit only one application per responsible party per day, and the online session times out after 15 minutes of inactivity.
Once the EIN is in hand, open a bank account in the LLP’s name. Keep business and personal finances completely separate from the first day. Courts look closely at whether partners commingled funds when a creditor asks them to set the liability shield aside, and casual mixing of accounts is one of the fastest ways to lose the protection you just paid to establish.
Depending on your industry and location, you may also need professional licenses, local business permits, or industry-specific registrations. These are separate from the LLP filing and vary by jurisdiction.
Know Whether Your State Offers a Full or Partial Shield
The LLP’s defining feature is its liability shield, and the strength of that shield depends on where you register. This is the single most important distinction many partners overlook.
Full-shield states protect partners from personal liability for all partnership obligations, whether they come from contracts, loans, leases, or another partner’s negligence. Creditors can pursue partnership assets but cannot reach a partner’s personal bank accounts, home, or retirement savings. Most states that adopted or updated their LLP statutes in recent years follow this approach.
Partial-shield states offer narrower coverage. Partners are protected from liability for another partner’s malpractice or negligence, but they can still be personally on the hook for the partnership’s contractual debts, including unpaid rent, vendor invoices, and outstanding loan balances. A partner in a partial-shield state who assumes the LLP covers every business obligation can be in for a serious surprise when a creditor comes after personal assets for an unpaid commercial lease.
Confirm which type of shield your state provides before you file. The answer may change your calculus about whether an LLP or an LLC fits your situation better.
Where the Shield Won’t Protect You
Even a properly formed LLP in a full-shield state has well-established exceptions to the liability protection. Partners who don’t understand these go into business with a false sense of safety.
Your Own Conduct
The shield never covers your own malpractice, negligence, fraud, or intentional wrongdoing. If you personally fall short of a professional standard of care, you are personally liable for the damages regardless of the LLP structure. Professionals remain individually accountable for their own work.
Supervising Other People’s Work
In many states, a partner who directly supervises someone else can be held personally liable for that person’s errors. If an associate working under your direction commits malpractice, your state may treat that as your responsibility. Some states apply the rule only in professional-service LLPs, others more broadly. Managing other people’s work carries risk the LLP structure doesn’t fully absorb.
Personal Guarantees
When a partner signs a personal guarantee on a loan, lease, or credit line, that guarantee creates a direct contractual obligation that bypasses the LLP shield entirely. Lenders and landlords regularly demand personal guarantees from LLP partners for exactly that reason.2National Credit Union Administration. Personal Guarantees – Examiner’s Guide Before you sign one, understand that you are voluntarily opening a hole in your own protection.
Commingling and Misuse of the Entity
Courts can disregard the shield when partners treat the LLP as an extension of themselves. Mixing personal and business funds, running personal expenses through business accounts, undercapitalizing the partnership at formation, or using the entity to conceal fraud can all give creditors grounds to reach personal assets. Courts generally require fairly egregious conduct before taking this step, and minor bookkeeping slips won’t trigger it. But partners who routinely blur the line are gambling with the protection they formed the LLP to get.
Letting the Registration Lapse
If the LLP fails to file required annual reports or pay renewal fees, the state can administratively revoke the registration. Partners may lose statutory liability protection for the period the entity was out of compliance. Getting caught without a valid registration when a claim lands is one of the most preventable disasters in business law.
Handle the Tax Obligations
An LLP is a pass-through entity for federal tax purposes. The partnership itself pays no income tax. It files an informational return on Form 1065, and each partner receives a Schedule K-1 reporting their share of income, losses, deductions, and credits.3Internal Revenue Service. About Form 1065, U.S. Return of Partnership Income Partners report those amounts on their personal returns whether or not the income was actually distributed.4Internal Revenue Service. 2025 Partner’s Instructions for Schedule K-1 (Form 1065)
The partnership return is due by March 15 for calendar-year partnerships, which is the 15th day of the third month after the tax year ends.5Internal Revenue Service. Starting or Ending a Business If that falls on a weekend or federal holiday, the deadline moves to the next business day. Late filing triggers penalties.
Self-employment tax catches many new partners off guard. Partners who actively work in the business owe self-employment tax on their share of partnership income, covering Social Security and Medicare. Unlike employees who split these taxes with an employer, partners pay the full amount. The IRS has consistently held that partners in professional-service LLPs — law firms, accounting practices, architecture firms, consulting partnerships — cannot claim the limited-partner exception to self-employment tax when they actively provide services.6Internal Revenue Service. Self-Employment Tax and Partners
Partners who expect to owe $1,000 or more at filing must make quarterly estimated tax payments, typically in April, June, September, and January.7Internal Revenue Service. Estimated Taxes Missing them generates underpayment penalties on top of the tax.
An LLP can elect to be taxed as a corporation by filing Form 8832, but this is uncommon. Pass-through taxation is usually the reason partners chose the LLP in the first place.
Register in Other States If You Operate Across State Lines
An LLP formed in one state that conducts business in another must register as a “foreign” LLP in each additional state. The process, called foreign qualification, involves filing a certificate of authority, paying filing fees, and appointing a registered agent in the new state. Do this before you start operating there, not after a problem appears.
Skipping foreign qualification carries real consequences. An unregistered foreign LLP generally cannot file lawsuits in that state’s courts, which means it may be unable to enforce contracts or collect debts in that jurisdiction until it registers and pays back fees and penalties. Most states also impose monetary penalties for operating without proper registration, and in some, individual partners can face personal liability for those penalties.
Each state where you register will have its own annual reporting requirements and fees on top of your home state’s obligations.
Keep the LLP in Good Standing
Most states require LLPs to file annual or biennial reports and pay renewal fees. Costs vary widely. Some states charge modest flat fees, others charge per partner, and a few base the fee on the partnership’s income, which can become substantial for high-earning firms.
Miss a renewal deadline and the state can administratively revoke your registration, stripping the liability shield until you cure the deficiency. Some states charge late fees and require you to demonstrate continued eligibility before reinstating the registration. The cost of staying current is minor compared to the cost of learning your protection vanished six months ago because nobody filed the report.
Keep a calendar of filing deadlines for every state where the LLP is registered, including any foreign qualification states, and set reminders well in advance. States give little warning before revoking a registration for non-compliance, and reinstatement is more expensive and slower than filing on time.