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529 College Savings Tax Guide by State 2026: Deductions, Superfunding & SECURE 2.0 Roth Rollover

Quick Answer: 529 college savings plans offer federal tax-free growth and withdrawals for qualified education expenses. The real variation is in state income tax deductions: states like New York and Illinois allow up to $10,000 in deductions per filer; others like California offer no deduction at all. You can use any state's 529 plan regardless of where you live. SECURE 2.0 (2024) added a major new benefit: unused 529 funds can be rolled over to the beneficiary's Roth IRA tax-free (up to $35,000 lifetime, $7,000/year), eliminating the 'overfunding' risk. Superfunding allows 5 years of gift tax exclusions upfront — up to $90,000 per donor per beneficiary ($180,000 per couple) without gift tax.

By Daniel, founder of CountryTaxCalc.com

Last Updated: April 2026

Key Facts

State Income Tax Deductions for 529 Contributions

States with generous deductions (per filer, per year): New York: $5,000 ($10,000 MFJ); Illinois: $10,000 ($20,000 MFJ); Michigan: $5,000 ($10,000 MFJ); Wisconsin: $3,860; Virginia: $4,000 (age 70+: unlimited); Colorado: full deduction (no limit); New Mexico: full deduction; South Carolina: full deduction; Mississippi: full deduction. States with NO state income tax deduction but also no state income tax: Florida, Texas, Nevada, Tennessee, Wyoming, Washington, South Dakota, Alaska. States with income tax but NO 529 deduction: California, Delaware, Hawaii, Kentucky, Maine, New Jersey. Key: even residents of no-deduction states benefit from federal tax-free growth and can use any state's plan.

SECURE 2.0: 529-to-Roth IRA Rollover (2024 Onwards)

SECURE 2.0 Act (effective January 1, 2024): unused 529 plan funds can be rolled to the beneficiary's Roth IRA tax-free. Key rules: the 529 account must be at least 15 years old; annual rollover amount capped at $7,000 (2025 Roth contribution limit) per year; lifetime maximum: $35,000 total from all rollovers; the beneficiary must have earned income of at least the rollover amount; contributions made in the prior 60 days cannot be rolled over. This rule eliminates much of the 'overfunding' risk. Strategy: open a 529 for a newborn immediately (starts the 15-year clock), even with a small amount — giving maximum flexibility for future Roth rollovers.

Superfunding Strategy

Annual gift tax exclusion (2025): $18,000 per donor per recipient. 529 superfunding: you can front-load up to 5 years of annual exclusions into a 529 in one year — $90,000 per donor per beneficiary ($18,000 × 5 years). A married couple can superfund $180,000 per beneficiary in one year. The superfunding election (Form 709) spreads the gift over 5 years for gift tax purposes — meaning no gift tax and no reduction in the lifetime exemption. If the donor dies within the 5-year period, the remaining pro-rated amount is added back to their estate. Use case: grandparents with $1M+ in savings looking to reduce estate while jump-starting grandchildren's college funds.

Which State's 529 Plan Should I Use?

Residents of states with 529 deductions: use your own state's plan to capture the deduction (worth 4–9% of contributions in most states). Residents of no-deduction states (CA, NJ, etc.) or no-income-tax states: choose based on plan quality and investment options. Top-rated plans: Utah My529 (consistently rated #1 — low costs, flexible investments), Nevada Vanguard 529 (low-cost index fund options), New York 529 College Savings Program (good if NY resident), Fidelity-based plans (Arizona, Delaware, Massachusetts). Key metric: expense ratios. Plan fees compound over 18 years — a 0.1% expense ratio vs 0.8% on a $100,000 balance saves approximately $15,000 over 18 years.

Qualified vs Non-Qualified Withdrawals

Qualified education expenses (tax-free withdrawals): tuition, mandatory fees, room and board (if enrolled at least half-time), books, supplies and equipment, computers and software used for school, K–12 tuition (up to $10,000/year), student loan repayment ($10,000 lifetime per beneficiary). NOT qualified: transportation, health insurance, extracurricular activities not required by the school, sports and clubs. Non-qualified withdrawal consequences: withdrawn earnings are subject to federal income tax + 10% penalty. Exception to penalty (tax still applies): scholarships received, disability, death, attendance at a US military academy, ROTC benefits.

529 plans are the tax-advantaged backbone of US college savings — contributions grow tax-free, and withdrawals for qualified education expenses (tuition, room and board, books, K–12 tuition up to $10,000/year) are completely tax-free federally. The critical planning variable is state income tax deductions: some states provide generous deductions for contributions, others provide nothing. SECURE 2.0 Act (effective 2024) dramatically increased 529 attractiveness by allowing unused 529 funds to roll into Roth IRAs — addressing the longstanding concern about overfunding a 529 if the child doesn't attend college or gets a scholarship.

529 vs Other College Savings Options

529s are not the only college savings vehicle — here's how they compare:

Coverdell Education Savings Account (ESA): Annual contribution limit $2,000/child; no state deduction; investment flexibility (self-directed brokerage within the ESA); must be used before age 30 (or rolled to a family member); eligible for K–12 and college. Lower contribution limit makes it supplemental to, not a replacement for, a 529.

Roth IRA as college savings: Roth contributions (not earnings) can be withdrawn at any age for any purpose without penalty. Using a Roth IRA for college preserves flexibility — if the child doesn't attend college, money stays in retirement. Downside: Roth withdrawals count as income for FAFSA financial aid calculations (529 distributions from parent-owned accounts do not count as income in FAFSA).

UTMA/UGMA custodial accounts: No special tax benefits; earnings taxed (kiddie tax rules apply for minors); assets become the child's at 18–21 and count heavily against financial aid (as student assets). Not recommended as primary college savings vehicle.

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Frequently Asked Questions

Q: What happens if my child gets a scholarship and I have 529 money left over?

If your child receives a scholarship, you can withdraw up to the scholarship amount from the 529 without the 10% early withdrawal penalty. The earnings portion of that withdrawal is still subject to ordinary income tax (the penalty waiver applies to the 10% only). Other options for excess funds: (1) Change the beneficiary to another family member (sibling, cousin, yourself) — family member includes a wide range; (2) SECURE 2.0 Roth rollover — after 15 years of 529 ownership, roll up to $35,000 lifetime to the beneficiary's Roth IRA; (3) Keep the funds for graduate school expenses; (4) Use for K–12 expenses if needed. The scholarship exception and Roth rollover option together significantly reduce the overfunding risk.

Q: Does a 529 affect financial aid (FAFSA)?

Parent-owned 529 plans: counted as parent assets on FAFSA at the parental assessment rate (approximately 5.64% of assets count toward Expected Family Contribution). This is favorable compared to student-owned assets (assessed at 20%). Parent 529 distributions do not count as income on FAFSA. Grandparent-owned 529 plans: under the FAFSA Simplification Act (effective 2024–25 aid year), grandparent-owned 529 distributions no longer count as student income on FAFSA — previously a significant disadvantage. Student-owned 529 plans: counted as student assets (20% assessment) — generally disadvantageous. Optimal structure: parent owns the 529 (or grandparent under new FAFSA rules).

Q: Can I use a 529 for K-12 expenses?

Yes, the Tax Cuts and Jobs Act (2017) expanded 529 qualified expenses to include up to $10,000 per year in K–12 tuition at public, private, or religious schools. Important: the $10,000 K–12 limit is per beneficiary per year, not per account. If a grandparent and parent each contribute to separate 529s for the same child, total K–12 withdrawals combined still cannot exceed $10,000. State conformity varies: some states (including California) do not conform to the K–12 expansion — meaning you might owe state income tax on K–12 distributions even though they're federally qualified. Always verify your state's K–12 529 rules before using.

Disclaimer: This guide provides general tax information for educational purposes only. 529 rules, state deduction amounts, and FAFSA treatment can change. SECURE 2.0 provisions have complex requirements — verify Roth rollover eligibility rules before executing. Nothing in this guide constitutes tax, financial, or investment advice. Consult a tax professional for advice specific to your situation.