Form 990-T is the Exempt Organization Tax Return filed when a retirement plan owes Unrelated Business Income Tax (UBIT). Filing is required when gross UBTI or UDFI income exceeds $1,000 in a tax year. The return is filed on behalf of the plan, not on your personal return, and payment is made from plan funds.
The $1,000 threshold applies to gross income before deductions, not net taxable income. If your plan's gross UBTI or UDFI income exceeds $1,000, the obligation to file exists regardless of whether deductions reduce the net taxable amount to zero. It can sometimes make sense to file a 990-T below this threshold to capture losses that can be applied in future tax years.
For IRA investors, the most common trigger is UDFI from a leveraged real estate investment or real estate syndication. For Solo 401(k) holders, filing is uncommon; the plan's exemption from UDFI on real estate acquisition debt eliminates the most frequent source of exposure. A Solo 401(k) would only need to file if it has non-real estate leveraged income or UBTI from an active trade or business.
Form 990-T is due by April 15. The return must be filed electronically through the IRS e-file system.
This is an important distinction. The plan, not you personally, is the taxpayer. The return is filed using the plan's own tax identification number, and payment is submitted from the plan's accounts. For an IRA, that means payment comes from the IRA LLC or trust bank account. For a Solo 401(k), payment comes from the plan's trust account.
The 990-T filing has no intersection with your personal tax return. Income and losses inside the plan stay inside the plan.
A Solo 401(k) already has a plan EIN, which is used as the taxpayer identification number on Form 990-T. An IRA that becomes subject to UBIT must obtain a separate EIN for the IRA itself. The IRA cannot use your Social Security number on this return. Your tax professional can assist with obtaining the IRA EIN should one be necessary.
You are responsible for ensuring Form 990-T is filed on time, but the preparation should involve a qualified tax professional. Not every CPA is familiar with 990-T filings. Look for someone with experience in tax-exempt entity returns, including non-profits or foundations. Any CPA comfortable with that filing category will have the knowledge base needed.
If your current CPA is not familiar with Form 990-T, ask for a referral.
Do I need to make quarterly estimated tax payments?
Possibly. If your plan's expected UBIT liability for the year will exceed $500, quarterly estimated tax payments are required. This is the same estimated tax logic that applies to other tax-exempt entities. Your tax professional can help you determine whether quarterly payments are necessary and calculate the appropriate amounts.
What if my IRA doesn't have an EIN yet?
You will need to obtain one before filing. An EIN for an IRA is separate from the EIN of any IRA LLC or trust the plan may own. The IRA itself needs its own EIN to file Form 990-T. This is a straightforward application through the IRS, but should be completed well before the filing deadline.
What kind of CPA should I look for?
Look for a CPA with experience in tax-exempt entity returns; someone who regularly works with non-profits, churches, or foundations. You do not need a specialist who focuses exclusively on self-directed IRAs. If your existing CPA cannot assist, an internet search for "CPA + non-profit" or "CPA + 990-T" in your area is a good starting point.
This information is provided for educational purposes only and should not be interpreted as tax, legal, or investment advice. Readers are encouraged to consult a qualified professional who can offer guidance based on their personal situation.