How to Start a Partnership in Massachusetts: Requirements, Taxes, and Compliance

Starting a business with one or more partners can be a practical way to combine skills, capital, and responsibilities. In Massachusetts, however, the process depends on the type of partnership you choose and may involve state registration, federal tax filings, local business requirements, and ongoing reporting.

This guide explains the main steps for forming a partnership in Massachusetts and highlights important tax and compliance responsibilities.

Understanding Partnerships in Massachusetts

A partnership generally involves two or more individuals or organizations operating a business together and sharing its profits and losses. For federal tax purposes, partnerships are generally treated as pass-through entities: the partnership reports its financial activity, while the partners generally report their respective shares on their own tax returns.

Massachusetts businesses may use different partnership structures, including:

General Partnership

A general partnership is typically the simplest partnership arrangement. The partners participate in the business and can have personal liability for partnership obligations. Unlike certain registered partnership structures, a general partnership does not register with the Massachusetts Secretary of the Commonwealth.

Limited Partnership

An LP generally combines at least one general partner with limited partners. The general partner has greater responsibility for the business, while limited partners generally receive liability protection subject to applicable law and the structure of the partnership.

Limited Liability Partnership

An LLP provides a partnership structure with liability protections for its partners, subject to Massachusetts law and the requirements applicable to the entity.

Because the legal and tax consequences can differ considerably among these structures, choosing the appropriate form should be based on the business's activities, ownership arrangement, liability considerations, and professional advice when necessary.

Steps to Form a Partnership in Massachusetts

1. Choose and Check the Business Name

Before establishing the business, make sure the proposed name is available and does not create confusion with another company.

For partnerships that register with the Commonwealth, the Massachusetts Secretary of the Commonwealth provides an online business-entity search. General partnerships have different requirements because they do not register with the Secretary of the Commonwealth.

You should also check the relevant city or town requirements, particularly if the business will operate under a name different from the partners' legal names.

2. Complete Any Required State Registration

The registration process depends on the partnership structure.

Massachusetts currently lists filing requirements for limited partnerships, limited liability partnerships, and foreign limited partnerships. The Commonwealth's published information lists filing fees and annual-report requirements that should be checked before submitting documents because fees and procedures can change.

A general partnership does not register with the Secretary of the Commonwealth in the same manner as these registered partnership structures.

3. Determine Whether a DBA Is Necessary

If the partnership operates using a business name that is different from the legal names of the partners, a local business certificate—commonly referred to as a DBA or “doing business as” registration—may be required.

This filing is generally handled by the city or town where the business operates. Local requirements should therefore be confirmed with the appropriate municipality.

4. Apply for an EIN

Partnerships generally need an Employer Identification Number (EIN) from the Internal Revenue Service. The EIN is used for federal tax and business identification purposes.

The IRS provides the application process and requirements through its official website.

5. Register for Massachusetts Taxes When Required

Depending on the business's activities and tax responsibilities, the partnership may need to establish an account with MassTaxConnect.

The specific state tax registrations required can vary according to factors such as the nature of the business, sales activity, employees, and other Massachusetts tax obligations.

How Partnership Taxes Work

One of the most important characteristics of a partnership is pass-through taxation.

Rather than generally paying federal income tax at the entity level, the partnership reports its income, deductions, gains, losses, and other relevant items. Those amounts are then allocated among the partners according to the applicable partnership agreement and tax rules. Each partner generally reports their share on their individual or other applicable tax return.

Federal Form 1065

A partnership generally files Form 1065, U.S. Return of Partnership Income, to report its financial activity to the IRS.

The partnership also generally prepares a Schedule K-1 for each partner, showing that partner's share of income, deductions, credits, and other tax information.

The IRS released updated 2025 Form 1065 and Schedule K-1 instructions in January 2026, so taxpayers should use the applicable instructions for the tax year being filed rather than relying on an older version.

Individual Tax Responsibilities

Partners generally report partnership income on their personal tax returns. Depending on their role and the nature of the partnership income, they may also have self-employment tax obligations.

For example, the IRS states that partners performing services for a partnership are generally treated as self-employed rather than employees. Self-employment tax rules can differ for certain limited partners and should be evaluated based on the applicable federal rules.