There are a few rules to follow when you are determining your required tax year:
- If a partner or group of partners owns more than 50% interest in the company, which makes it a majority interest in the capital and partnership profits, the required tax year will be the tax year of this partner or group of partners. The tax year cannot be changed for the next two years. This should also be determined on the first day of the partnership.
- If there is no majority interest tax year then you use the tax year of all the principal partners who have a more than 5% interest in the capital and partnership profits.
- If there is no majority interest tax year and the principal partners dont have the same tax year then you have to use the tax year that has the least aggregate deferral of income to its partners.
This is a method that IRS recommends after everything fails. Basically you collect all the different tax years of the partners. For e.g., one partner might use Dec. 31st, but someone else might use March 31st or May 31st. You now pick one partner, Joe with a tax year ending March 31st. And now you use everyone elses tax year to determine the difference in the months with Joes. For e.g., Mikes tax year ends on Nov. 30. For our example we will suppose that there are only two partners, Joe and Mike. They both own 50% of stock in the company. Now you count forward from the end of Joes tax year to the end of Mikes tax year. Joes tax year ends on March 31st. So you start counting from April, May, June, July, August, September, October, and November. Now you count the month listed above and you get 8. You multiply .50 (50%) by 8, which equals 4.0. This is the aggregate deferral for Mike. You do the same thing using Mikes tax year and counting forward to the end of Joes tax year. This time you get 4 (December, January, February, and March). You multiply .50 by 4, which equals 2.0. This is the aggregate deferral for Joe. The least aggregate deferral belongs to Joe, so the partnership will use his tax year ending on March 31st and beginning on April 1st.
All of this is not as simple as it sounds but we hope that we have made the process easier for you. If a partnership changes its tax year in the middle of a previous tax year that they were using then they have to file a short term period return. This is usually the form 1065.