Single-Member vs Multi-Member LLC: Tax Forms and Differences
A single-member LLC and a multi-member LLC file different IRS forms. Compare Form 5472, Form 1065, deadlines and paperwork for foreign owners.
What is the difference between a single-member and a multi-member LLC?
A single-member LLC has one owner and is ignored as a separate taxpayer by default. When that owner is foreign, the LLC files Form 5472 with a pro forma Form 1120 by April 15. A multi-member LLC has two or more owners and is taxed as a partnership, so it files Form 1065 by March 15 and gives each member a Schedule K-1.
1Side by side
| Point | Single-member LLC | Multi-member LLC |
|---|---|---|
| Owners | One | Two or more |
| Default federal tax status | Disregarded entity | Partnership |
| Main yearly form for foreign owners | Form 5472 with pro forma Form 1120 | Form 1065 with Schedules K-1 |
| Deadline for calendar year companies | April 15 | March 15 |
| Operating Agreement | Short | Detailed, covers each partner |
2Single-member LLC with a foreign owner
The LLC does not pay income tax itself. It reports transactions between the company and its owner on Form 5472, attached to a pro forma Form 1120. This is required even with zero income, and the penalty for missing it is $25,000.
3Multi-member LLC
The partnership return on Form 1065 reports the company income, and each member receives a Schedule K-1 showing their share. Late filing penalties are charged per partner for each month the return is late.
When a partnership has income connected with a U.S. business and foreign partners, it may also have to withhold tax on the foreign partners' share.
4Which one should you form?
Form a single-member LLC when you are the only owner. Add a partner only when someone truly co-owns the business, because a second member changes the tax filing and the deadline.
Official sources
Be Filing Inc is an IRS Certifying Acceptance Agent. This guide is general information, not legal or tax advice, and rules can change. Last reviewed in November 2026.
Quick questions, answered
Short, direct answers. If yours is not here, NIA or our team will help.
Ask on WhatsAppIs a husband and wife LLC single-member or multi-member?
For foreign owners it is normally a multi-member LLC and files Form 1065.
Can a single-member LLC become multi-member later?
Yes. Adding a member changes the tax classification to a partnership from that date.
Does a multi-member LLC file Form 5472?
Not as a partnership. Form 5472 applies to foreign-owned disregarded entities and certain corporations.
Can an LLC choose to be taxed as a corporation?
Yes. Either type can elect corporate taxation with Form 8832.
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