What Counts as a Partnership

A partnership exists for tax purposes whenever two or more persons join together to carry on a trade or business, with each contributing money, property, labor, or skill, and each expecting to share in the profits and losses. This definition is broader than many people realize. Two freelancers who collaborate on a project and split revenue may have inadvertently formed a partnership. A joint venture between two companies to develop a property is a partnership. Even a husband and wife operating a business together may be treated as a partnership rather than a sole proprietorship unless they qualify for and elect the qualified joint venture exception.

Limited liability companies with two or more members are treated as partnerships for federal tax purposes by default, unless they elect to be taxed as a corporation. Multi-member LLCs are the most common type of entity filing Form 1065 today. Foreign partnerships with U.S.-source income or U.S. partners also have filing obligations.

The Informational Return Requirement

Form 1065 is an informational return — the partnership itself does not pay income tax. Instead, it reports the partnership’s total income, deductions, gains, losses, and credits, then allocates those items among the partners according to the partnership agreement. Each partner receives a Schedule K-1 showing their distributive share. Partners then report these amounts on their individual returns and pay tax at their personal rates.

The partnership must file even if it had no income or activity during the year. As long as the partnership has not been formally terminated, the filing obligation continues. A partnership is not considered terminated for tax purposes merely because it stops conducting business — it must either have no remaining operations and assets or have the partners agree to formally dissolve it.

Penalties for Late or Missing Returns

The penalties mirror those of S corporations: $235 per partner per month for up to 12 months (for 2024 returns). A partnership with ten partners that files five months late faces a penalty of $11,750. These penalties are assessed automatically by the IRS and apply even when no tax is due at the partnership level. Small partnerships with ten or fewer partners where all partners are natural persons may qualify for penalty relief under Revenue Procedure 84-35, but only if each partner timely reports their share of partnership income on their individual return.

Due Dates and Extensions

Form 1065 is due on the 15th day of the third month after the end of the partnership’s tax year — March 15 for calendar-year partnerships. This is one month earlier than the individual return due date, which ensures partners receive their K-1s in time to file their own returns. A six-month extension to September 15 is available by filing Form 7004. Even with an extension, the partnership should issue K-1s to partners as soon as possible to avoid delaying the partners’ individual filings.