3K-1: Partner’s Massachusetts Information (2025)
Massachusetts · Massachusetts DOR · Used for tax years 2025
Massachusetts Form 3K-1 reports a partner’s share of partnership income, losses, deductions, and credits for 2025. It also reports the partner’s capital account, ownership percentages, liabilities, and pass-through entity payment and credit information.
What you'll need
Have these records and details available to complete the form:
- The partner’s name, address, taxpayer identification number, and partner type and status.
- The partnership’s name, address, and federal identification number.
- Massachusetts Form 3 figures referenced on lines 1 and 7 through 21.
- U.S. Form 1065, Schedule K, for guaranteed payments to partners on line 2.
- Records of the partner’s capital account, profit and loss percentages, capital percentages, and liabilities.
- Withholding, composite payment, and credit information, including certificate numbers where requested.
Attach an explanation for any other increase or decrease reported on line 29.
Common mistakes
- Selecting more than one partner type in item A. The form says to fill in one only.
- Forgetting to mark the loss box. For a loss, the form directs you to mark an X in the box.
- Stopping after the first page. The form reminds you to continue Schedule 3K-1 on the other side.
- Forgetting to carry total other credits from the Credit Section to line 5b.
Questions people ask
What tax-year dates should I enter for 2025?
Calendar-year filers enter 01-01-2025 and 12-31-2025. Fiscal-year filers enter the appropriate beginning and ending dates.
How do I calculate the ending capital account balance?
For line 31, add lines 25, 27, 28, and 29, then subtract line 30.
Where do I report withholding and composite payments?
Report the withholding amount on line 38 and payments made in a composite filing on line 39. Line 40 is for credit for amounts withheld by a lower-tier entity and includes a payer identification number field. Line 41 reports composite payments made by a lower-tier entity and is informational only.
Where is the partner’s Chapter 63D refundable credit reported?
Line 42e is labeled for the partner’s refundable credit. The Credit Section also includes an entry for the Chapter 63D refundable credit.