A collective investment trust, often shortened to CIT, is a pooled investment fund maintained by a bank or trust company that combines assets from multiple retirement plans into a single professionally managed portfolio. It works much like a mutual fund, but only eligible retirement plans can invest in it, and it is regulated by banking, labor, and tax authorities rather than by the Securities and Exchange Commission. If you have seen a CIT listed as an option in your 401(k) menu, that is the vehicle behind the name.
How a CIT Is Structured
A CIT can only be created and maintained by a bank or trust company acting in a fiduciary capacity.1Investor.gov. Collective Investment Trust (CIT) The bank holds legal title to the fund’s assets as trustee and is legally obligated to manage them solely in the interests of the participating retirement plans.2OCC. Collective Investment Funds
Federal regulations require the bank to keep exclusive management authority over the fund. It may delegate specific tasks like investment research or trading to a sub-advisor, but only to the extent a prudent person would delegate in similar circumstances, and it cannot hand off ultimate decision-making to an outside firm.3eCFR. 12 CFR 9.18 – Collective Investment Funds The bank must also keep the trust’s assets segregated from its own assets and from other client accounts, and it handles custody, accounting, and valuation.
Two documents govern the arrangement. The declaration of trust is the CIT’s primary governing document, setting out the fund’s investment objectives, operating provisions, and the trustee’s powers. Because CITs are not registered investment companies, the declaration of trust takes the place of a mutual fund prospectus.3eCFR. 12 CFR 9.18 – Collective Investment Funds Each investing plan then signs a participation agreement, which confirms the plan is legally eligible, binds it to the trust’s terms, and typically includes the plan’s fee schedule.
Who Can Invest in a CIT
CITs are institutional vehicles. You cannot open one directly as an individual investor. Access is limited to certain tax-advantaged retirement arrangements that meet the conditions established under IRS Revenue Ruling 81-100.4Internal Revenue Service. Changes to 81-100 Group Trust Rules Eligible participants include:
- Qualified retirement plans under IRC Section 401(a), which covers the most common employer-sponsored plans, including 401(k) plans and defined benefit pensions.
- Individual retirement accounts. Despite a common misconception, IRAs are eligible to pool assets in an 81-100 group trust when the required conditions are met.4Internal Revenue Service. Changes to 81-100 Group Trust Rules
- Governmental 457(b) plans, added to the 81-100 framework through later revenue rulings.4Internal Revenue Service. Changes to 81-100 Group Trust Rules
To keep the trust’s tax-exempt status, the group trust instrument must provide separate accounting to track each participating plan’s interest, and each participating entity must be tax-exempt under IRC Section 501(a) or otherwise not subject to federal income tax.5Internal Revenue Service. Revenue Ruling 2011-1
Section 403(b) plans are a notable exception. Tax law was amended under the SECURE 2.0 Act of 2022 to allow 403(b) participation in CITs, but federal securities laws still need a corresponding change. Legislation to make that change passed the U.S. House of Representatives in December 2025 and is awaiting Senate action. Until it is enacted, 403(b) plans generally cannot invest in CITs.
How CITs Differ From Mutual Funds
CITs and mutual funds both pool investor money into a professionally managed portfolio, and the day-to-day experience for a participant can look similar. The differences show up in cost, disclosure, and who is allowed in.
Two federal securities laws let a CIT skip SEC registration. The Securities Act of 1933 exempts interests in a bank-maintained collective trust fund tied to a qualified retirement plan, governmental plan, or certain church plans.6Office of the Law Revision Counsel. 15 USC 77c – Classes of Securities Under This Subchapter The Investment Company Act of 1940 excludes a bank-maintained collective trust fund from the definition of “investment company” as long as it holds only assets from qualified retirement plans or governmental plans. Those exemptions apply only inside that structure; a fund that fell outside it would need to register as a mutual fund.7FDIC. Section 7 Compliance – Pooled Investment Vehicles
Because CITs skip SEC registration, they avoid registration fees, prospectus requirements, and ongoing SEC-level compliance costs. Those savings usually translate into lower expense ratios for plan participants, and the fee advantage is the most commonly cited reason plan sponsors choose CITs over mutual funds.
Mutual funds must publicly disclose their portfolio holdings and how they vote corporate proxies. CITs face no such requirement, and the bank trustee handles governance without public reporting. Mutual funds also produce a standardized prospectus; a CIT’s declaration of trust serves a similar function but is not subject to the same format or content rules.
Accessibility is the other big difference. Mutual funds are available to any investor, retail or institutional. CITs are restricted to eligible retirement plans and trusts, so you can only reach one through a workplace retirement plan or similar arrangement that invests in it. The trade-off for lower fees is less regulatory protection at the participant level, since CITs sit outside the SEC’s oversight framework.
Who Regulates CITs
The SEC is out of the picture, but CITs are not unregulated. Three sets of authorities share oversight.
Banking Regulators
The Office of the Comptroller of the Currency is the primary regulator for CITs maintained by national banks. Its rules at 12 CFR 9.18 govern fund management, asset valuation, audits, and reporting.3eCFR. 12 CFR 9.18 – Collective Investment Funds State-chartered trust companies and banks are supervised by their state banking departments, which apply comparable safety and soundness standards and conduct their own examinations. The bank must value the fund’s assets at least once every three months, and at least once a year for assets that are not readily marketable, such as real estate or private equity.8OCC. Collective Investment Funds – Comptrollers Handbook
Department of Labor and ERISA
When a CIT holds assets from ERISA-covered plans, the fiduciaries managing those assets must act prudently, diversify investments, and avoid prohibited transactions such as self-dealing or dealings with conflicted parties.9U.S. Department of Labor. Advisory Opinion 2005-09A A fiduciary who breaches these duties can be personally liable for losses the plan suffers and may have to disgorge profits gained from misusing plan assets.
Prohibited transactions also carry excise tax penalties. A disqualified person who takes part in one faces an initial tax of 15% of the amount involved for each year the violation continues, and an additional tax of 100% of the amount involved if the transaction is not corrected in time.10Office of the Law Revision Counsel. 26 USC 4975 – Tax on Prohibited Transactions
Plan sponsors that offer a CIT in a participant-directed plan may qualify for protection under ERISA Section 404(c). If the plan gives participants a broad range of choices, adequate information for informed decisions, and genuine control over their allocations, the plan’s fiduciaries are generally not liable for losses that result from a participant’s own investment decisions.11eCFR. 29 CFR 2550.404c-1 – ERISA Section 404(c) Plans
Internal Revenue Service
The IRS monitors CITs to make sure they keep their tax-exempt status. A CIT does not pay income tax at the trust level; its exemption flows from the tax-exempt status of the participating plans. As long as each plan qualifies under Section 501(a), the portion of trust assets belonging to that plan remains exempt from income tax.5Internal Revenue Service. Revenue Ruling 2011-1
What You Should See as a Plan Participant
When a CIT is on the menu in a participant-directed retirement plan, the plan administrator has to give you detailed fee and performance information before you first direct your investments and at least once a year after that.12eCFR. 29 CFR 2550.404a-5 – Fiduciary Requirements for Disclosure in Participant-Directed Individual Account Plans For each investment option, you should receive:
- Average annual total returns for 1-, 5-, and 10-year periods, or the life of the fund if shorter, along with a statement that past performance does not guarantee future results and the returns of a comparable broad-based market index over the same periods.
- The total annual operating expenses, expressed both as a percentage and as a dollar amount per $1,000 invested.
- Any shareholder-type fees not already reflected in the expense ratio, such as redemption or transfer fees.
- Any restrictions on purchases, transfers, or withdrawals, such as equity wash provisions or minimum holding periods.
The disclosure must also state that fees are only one factor to consider and that the cumulative effect of fees can substantially reduce retirement account growth over time.12eCFR. 29 CFR 2550.404a-5 – Fiduciary Requirements for Disclosure in Participant-Directed Individual Account Plans This is the paperwork where you can directly compare a CIT to the other funds in your plan.
Getting Money Out
How quickly a plan can pull assets out of a CIT depends on what the fund holds. For CITs invested primarily in readily marketable securities, admissions and withdrawals follow the schedule in the fund’s written plan, with valuation dates set at least quarterly.
For CITs invested primarily in real estate or other assets that are not readily marketable, the bank may require a prior notice period of up to one year before a withdrawal. If the bank cannot complete the withdrawal within that period because of market conditions, it may request OCC approval to extend the period by up to another year, and the OCC can approve further extensions in ongoing severe market conditions if the bank shows a good-faith effort to satisfy withdrawal requests.3eCFR. 12 CFR 9.18 – Collective Investment Funds The declaration of trust may also reserve the bank’s right to distribute redemption proceeds as actual securities rather than cash. Before a plan sponsor commits assets, the declaration of trust is worth reading carefully for these liquidity terms and any notice requirements.