Municipal Fund Securities: 529 Plans, ABLE Accounts, and LGIPs

Municipal fund securities are pooled investment products created and sponsored by state or local governments. They look and act like mutual funds, but instead of representing debt the government owes back to investors, they hold participant money in professionally managed portfolios. Three products dominate the category: 529 college savings plans, 529A ABLE accounts for people with disabilities, and local government investment pools used by public entities. Because these products are issued by government bodies rather than private investment companies, they sit under a separate regulatory framework administered by the Municipal Securities Rulemaking Board (MSRB) rather than the rules that govern traditional mutual funds.

529 College Savings Plans

A 529 plan is a tax-advantaged account designed to help families save for education. There are two varieties. Savings plans, the far more common type, are offered by nearly every state. Contributions go into investment portfolios that may hold stocks, bonds, or a mix, and the account value rises or falls with the market. Most savings plans offer age-based portfolios that start aggressive when the child is young and shift conservative as college approaches.

Prepaid tuition plans work differently. Instead of investing in the market, you lock in today’s tuition rates at participating colleges. About nine states currently offer prepaid plans for public universities, and a separate program covers nearly 300 private institutions. The trade-off is straightforward: prepaid plans remove market risk but limit where the money can be used, while savings plans carry investment risk and offer broader flexibility.

Both types are authorized under Internal Revenue Code Section 529 and share the same federal tax benefits. The account value in a savings plan is never guaranteed by the state or any government entity.¹

529A ABLE Accounts

ABLE accounts let people with disabilities save and invest without losing federal benefits like Supplemental Security Income (SSI) or Medicaid. The person’s disability must have begun before age 46, a threshold that expanded at the start of 2026 under the SECURE 2.0 Act. The previous cutoff was age 26. The account itself functions like a 529 savings plan: contributions go into investment options whose value moves with the market.²

The money can cover a wide range of disability-related expenses: housing, transportation, education, employment training, assistive technology, health and wellness costs, legal fees, and more.² Up to $100,000 in the account is excluded from the resource limits used to determine SSI eligibility. If the balance climbs above $100,000, SSI payments are suspended (not terminated) until the balance drops back down, and Medicaid coverage continues throughout.³

Local Government Investment Pools

Local government investment pools serve a different purpose entirely. School districts, counties, and small municipalities use them to park idle cash and earn a return while keeping the money accessible for daily operations. A town that collects property taxes in bulk but spends the revenue gradually can place that cash in a pool alongside funds from dozens of other public entities, gaining professional portfolio management and better yields than any single entity could get alone.⁴

These pools resemble money market funds in practice but occupy a different legal space. Because they are instruments of state or local government, they are exempt from the Investment Company Act of 1940 under Section 2(b) of that law, which excludes government entities and their instrumentalities from registration.⁵ They carry no FDIC insurance and no guarantee of value, though most hold very short-term, high-quality debt to minimize risk.

Contribution Limits and Gift Tax Rules

There is no federal cap on how much a 529 savings plan can hold in total, but contributions are treated as gifts for federal tax purposes. In 2026, the annual gift tax exclusion is $19,000 per recipient. A married couple can give $38,000 to a single beneficiary’s 529 plan without filing a gift tax return. Anything above that amount counts against the donor’s lifetime gift and estate tax exemption.

A special rule lets contributors front-load up to five years of the annual exclusion into a single year. In 2026, one person can deposit up to $95,000 in a lump sum without triggering gift tax, as long as they make no additional gifts to that same beneficiary over the next five years. If the contributor dies within that window, a proportional share of the contribution gets pulled back into the estate for tax purposes. Each state also sets its own aggregate balance cap on 529 accounts, typically ranging from around $235,000 to over $500,000.

ABLE accounts run on tighter limits. Total annual contributions from all sources cannot exceed $19,000 in 2026. Beneficiaries who work and do not receive employer retirement plan contributions can add extra funds above that cap, up to the lesser of the federal poverty level for a one-person household or their own earned income for the year.⁶

What Counts as a Qualified Expense

The tax benefits hinge on spending the money on expenses the IRS considers qualified. For 529 college savings plans, qualified postsecondary expenses include tuition and fees at any eligible college, university, vocational school, or other postsecondary institution; room and board for students enrolled at least half-time, up to the school’s published cost of attendance; books, supplies, and equipment required for enrollment; computers and internet access used by the beneficiary; apprenticeship costs for programs registered with the Department of Labor; and student loan repayment up to $10,000 over the beneficiary’s lifetime, including loans held by siblings.⁷

Starting in 2026, 529 plans can also cover up to $20,000 per year in K-12 tuition at public, private, or religious schools, kindergarten through twelfth grade. The limit applies per beneficiary across all of their 529 accounts combined. The previous cap was $10,000. The K-12 category also expanded to include curriculum materials, tutoring fees, standardized testing costs, dual enrollment fees, and educational therapies for students with disabilities.⁸

ABLE qualified expenses are defined more broadly and center on disability-related needs: education, housing, transportation, employment training, assistive technology, health and wellness, personal support services, legal fees, financial management, and funeral costs.²

Tax Treatment

Earnings inside a 529 or ABLE account grow tax-deferred at the federal level. You owe no income tax on investment gains as long as the money stays in the account. Withdraw funds for qualified expenses, and the earnings come out completely free of federal income tax. Your original contributions are never taxed on withdrawal because they were made with after-tax dollars.⁹

Withdraw the money for something other than a qualified expense, and the earnings portion gets hit with federal income tax at your ordinary rate plus a 10% additional tax. The 10% penalty applies to both 529 plans and ABLE accounts. A few exceptions waive the penalty, including the beneficiary’s death, disability, or receipt of a scholarship. For 529 plans, the penalty is waived on the amount matching the scholarship, though the earnings remain taxable as income.⁹

Many states add their own tax incentives. Over 30 states offer a deduction or credit on state income taxes for 529 contributions, with deduction limits varying widely. A handful of states allow a full deduction for the entire contribution amount. About 11 states provide no state tax benefit at all, either because they lack an income tax or because they chose not to offer one. Earnings used for qualified expenses are also exempt from state income tax in most participating states.

Rolling Excess 529 Funds Into a Roth IRA

Families who saved more than their beneficiary needed for college now have an escape valve. Beginning in 2024, the SECURE 2.0 Act allows tax-free rollovers from a 529 account directly into a Roth IRA owned by the 529 beneficiary. The rules are strict:¹⁰

The 529 account must have been open for at least 15 years.
Only contributions (and their earnings) that have been in the account for at least five years are eligible.
Each year’s rollover cannot exceed the Roth IRA annual contribution limit. For 2026, that limit is $7,500, or $8,600 for individuals age 50 and older.¹¹
No more than $35,000 total can ever be rolled from a 529 into a Roth IRA for any single beneficiary.
The normal Roth IRA income eligibility thresholds do not apply to these rollovers.

A parent who opened a 529 at a child’s birth could, if funds remain unused, start moving up to $7,500 a year into the child’s Roth IRA once the child is an adult. Done consistently, the $35,000 lifetime cap can become a retirement head start through decades of tax-free growth.

Changing 529 Beneficiaries

A 529 account owner can switch the designated beneficiary at any time without tax consequences, as long as the new beneficiary is a qualifying family member of the current one. The IRS defines “family member” broadly to include the beneficiary’s spouse, children, siblings, parents, grandparents, nieces, nephews, aunts, uncles, in-laws, and first cousins. A 529 plan is never locked to one child. If the oldest finishes college with money left over, the account can be redirected to a younger sibling, a cousin, or the account owner.

Changing the beneficiary to someone outside the family, or taking a distribution for one student’s expenses from an account designated for a different student, triggers the same consequences as any non-qualified withdrawal: ordinary income tax plus the 10% additional tax on the earnings portion.

MSRB Oversight and Investor Disclosures

The Municipal Securities Rulemaking Board draws its authority from Section 15B of the Securities Exchange Act of 1934 and writes the rules that broker-dealers and municipal advisors must follow when selling or advising on municipal fund securities.¹² The Securities and Exchange Commission provides additional oversight, but the day-to-day conduct standards come from the MSRB.

MSRB Rule G-17 is the broadest conduct standard. It requires every broker, dealer, and municipal advisor to deal fairly with all persons and prohibits deceptive, dishonest, or unfair practices in any municipal securities activity.¹³

Before you buy, the selling dealer owes you specific written information. MSRB Rule G-32 requires delivery of the official statement (the equivalent of a prospectus for municipal securities) no later than settlement. The official statement covers the fund’s investment objectives, risk factors, and fee structure. For municipal fund securities, the dealer must also disclose any fee it receives as the issuer’s distribution agent, either at settlement or, for customers who receive periodic account statements, at least once per year.¹⁴

If you already own shares and make additional purchases, the dealer does not need to resend the same official statement. It must promptly forward any new, updated, or amended version as soon as it becomes available.¹⁴

Separately, MSRB Rule G-47 requires dealers to disclose all material information they know about a security at or before the time of trade. Information counts as material if a reasonable investor would consider it important when making a decision. That includes credit ratings, changes in an issuer’s financial condition, and any feature of the security that could affect its value or liquidity.¹⁵

1
Internal Revenue Service. 529 Plans Questions and Answers
2
Office of the Law Revision Counsel. 26 USC 529A – Qualified ABLE Programs
3
Social Security Administration. Achieving a Better Life Experience (ABLE) Accounts
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Municipal Securities Rulemaking Board. LGIP Investment Pool Structure
5
Office of the Law Revision Counsel. 15 US Code 80a-2 – Definitions and Applicability
6
Social Security Administration. Spotlight On Achieving a Better Life Experience (ABLE) Accounts
7
Office of the Law Revision Counsel. 26 US Code 529 – Qualified Tuition Programs
8
Internal Revenue Service. Topic No. 313, Qualified Tuition Programs (QTPs)
9
Office of the Law Revision Counsel. 26 USC 529 – Qualified Tuition Programs
10
Internal Revenue Service. Publication 590-A, Contributions to Individual Retirement Arrangements (IRAs)
11
Internal Revenue Service. 401(k) Limit Increases to $24,500 for 2026; IRA Limit Increases to $7,500
12
Municipal Securities Rulemaking Board. MSRB Rules
13
Municipal Securities Rulemaking Board. MSRB Rule G-17 – Conduct of Municipal Securities and Municipal Advisory Activities
14
Municipal Securities Rulemaking Board. Rule G-32 – Disclosures in Connection With Primary Offerings
15
Municipal Securities Rulemaking Board. Rule G-47 – Time of Trade Disclosure