Short Answer
A 529 plan distribution under IRC §529 is federal income tax-free if it is used for qualified higher education expenses (cost of attendance reduced by tax-free scholarships and AOTC/LLC-claimed expenses), qualified K-12 expenses (capped at $20,000 per beneficiary for 2026 under OBBBA §70413, $10,000 for 2025), apprenticeship program fees, student loan repayment (capped at $10,000 lifetime per individual), postsecondary credentialing expenses (new under OBBBA for distributions after July 4, 2025), or ABLE account rollover. Non-qualified distributions are taxed in two ways: the earnings portion (Form 1099-Q Box 2) is included in the recipient's gross income at ordinary rates, AND a 10% additional tax applies to that same earnings portion under §529(c)(6). Four exceptions waive the 10% additional tax: scholarship-equivalent distributions (up to the scholarship amount), death of beneficiary, disability of beneficiary, and service academy attendance. Federal contributions are NOT deductible, but most states with an income tax allow a deduction or credit. SECURE 2.0 §126 allows up to $35,000 lifetime in tax-free 529-to-Roth IRA rollovers once the account is at least 15 years old.
How the 529 Distribution Tax Calculation Works
The federal tax cost of a 529 distribution follows a five-step computation under IRC §529(c)(3) and §529(c)(6). The same algorithm applies whether the distribution is paid to the beneficiary, the account owner, or the school. For the full rules, including state conformity and AOTC coordination, see our 529 Plan Tax Benefits Guide.
Step 1: Earnings Ratio Confirmed
Earnings Ratio = Form 1099-Q Box 2 (earnings) ÷ Form 1099-Q Box 1 (gross distribution). The earnings ratio determines what fraction of any non-qualified portion is taxable. If your $12,000 distribution had $3,600 of earnings, the earnings ratio is 30% - meaning 30% of any non-qualified piece is taxable income, and the 10% additional tax applies to that 30% slice.
Step 2: Apply Caps Based on Use Type Confirmed
The calculator applies the per-use-type caps before testing how much of the distribution is qualified:
- College / vocational: No statutory dollar cap. Effective cap is cost of attendance under §472 of the Higher Education Act.
- K-12: $20,000 per beneficiary across all 529s for TY2026; $10,000 for TY2025.
- Apprenticeship: No statutory dollar cap. Program must be registered with the Department of Labor.
- Student loan: $10,000 lifetime per individual under §529(c)(9). Reduced by prior-year usage.
- Postsecondary credentialing: No statutory dollar cap. Available for distributions after 7/4/2025 under OBBBA §70413.
Step 3: Qualified vs Non-Qualified Split Confirmed
Qualified Distribution = min(Distribution, Capped Qualified Expenses). Non-Qualified Distribution = Distribution − Qualified Distribution. Earnings Allocated to Non-Qualified Portion = Non-Qualified Distribution × Earnings Ratio.
If the distribution is $12,000, qualified expenses are $9,000, and earnings ratio is 30%: Qualified = $9,000 (tax-free), Non-qualified = $3,000 (earnings allocation = $900 taxable, $2,100 basis = no tax).
Step 4: Income Tax on Non-Qualified Earnings Confirmed
Federal Income Tax = Non-Qualified Earnings × Recipient's Marginal Federal Rate. The recipient is the person who received the 1099-Q (the beneficiary, account owner, or school depending on how distributions were directed). A beneficiary who is a student often has a lower marginal rate than the account owner; directing the distribution to the beneficiary can lower the tax cost on a non-qualified portion - subject to the kiddie tax under §1(g) for beneficiaries under age 24.
Step 5: 10% Additional Tax with Exceptions Confirmed
10% Additional Tax = max(0, Non-Qualified Earnings − Exception Amount) × 10%. Reported on Form 5329 Part II. Exceptions under §530(d)(4) and §529(c)(6):
- Scholarship: Up to the amount of tax-free scholarship received by the beneficiary. Earnings still taxable.
- Death: Distribution paid to beneficiary's estate or beneficiary because of beneficiary's death. Earnings still taxable but no 10%.
- Disability: Beneficiary is disabled under §72(m)(7). Earnings still taxable but no 10%.
- Service academy: Distribution used for attendance at U.S. Military, Naval, Air Force, Coast Guard, or Merchant Marine Academy.
- AOTC/LLC coordination: If qualified expenses were used to claim AOTC or LLC, the §529(c)(3)(B)(v) anti-double-counting rule reduces 529-eligible expenses. The 10% additional tax does not apply to the amount otherwise excluded by this coordination rule.
Earnings Ratio Walkthrough
The earnings ratio is the linchpin of every 529 tax calculation. Higher ratios (older accounts with more growth) mean larger non-qualified tax exposure; lower ratios (newer accounts or down markets) shelter more of any non-qualified portion. The table below shows how a $12,000 distribution with $9,000 of qualified expenses produces different tax outcomes at different earnings ratios.
$12,000 Distribution, $9,000 Qualified Expenses, $3,000 Non-Qualified, 22% Marginal Rate
| Earnings Ratio | Box 2 Earnings | Non-Qualified Earnings | Income Tax | 10% Additional | Total Tax Cost |
|---|
| 10% (new account) | $1,200 | $300 | $66 | $30 | $96 |
| 20% | $2,400 | $600 | $132 | $60 | $192 |
| 30% (default) | $3,600 | $900 | $198 | $90 | $288 |
| 40% | $4,800 | $1,200 | $264 | $120 | $384 |
| 50% (long-held) | $6,000 | $1,500 | $330 | $150 | $480 |
| 65% (very long-held) | $7,800 | $1,950 | $429 | $195 | $624 |
For a long-held 529 with 50%+ earnings ratio, a non-qualified withdrawal costs 16.6% of the non-qualified amount in combined federal tax. Add state income tax on the same earnings (most conforming states) plus state-level recapture of prior contribution deductions in some states, and the all-in cost can exceed 25%. Best practice: avoid non-qualified withdrawals; use the leftover-rollover options (sibling beneficiary change under §529(c)(5), 529-to-Roth under SECURE 2.0 §126, ABLE rollover) before triggering a non-qualified distribution.
Frequently Asked Questions
How does a 529 plan save taxes for 2026?
A 529 qualified tuition program saves federal tax in three ways. First, contributions grow tax-free inside the account - no annual federal income tax on dividends, interest, or capital gains. Second, qualified distributions are excluded from gross income under IRC §529(c)(3)(B): if you use the distribution for qualified higher education expenses, qualified K-12 expenses (up to $20,000 per beneficiary for 2026 under OBBBA §70413), apprenticeship program fees, student loan repayments (up to $10,000 lifetime per individual), postsecondary credentialing expenses (new under OBBBA effective July 4, 2025), or ABLE account rollovers, both the earnings and basis portions are tax-free. Third, SECURE 2.0 §126 allows up to $35,000 lifetime in 529-to-Roth IRA rollovers once the account has existed for 15 years. Federal contributions are NOT deductible, but most states with income tax allow a state-level deduction or credit on contributions.
What is the K-12 tuition limit for 529 plans in 2026?
For tax year 2026 and later, IRC §529(c)(7) allows up to $20,000 per beneficiary across all 529 plans for K-12 expenses, raised from $10,000 by OBBBA (P.L. 119-21) §70413 effective for distributions after December 31, 2025. For tax year 2025, the cap remains $10,000 per beneficiary. OBBBA also expanded what counts as qualified K-12 expenses for distributions after July 4, 2025: curriculum materials, books, online educational materials, tutoring fees (from a non-related tutor), fees for standardized achievement tests, fees for Advanced Placement and dual enrollment, and educational therapies for students with disabilities. The expanded categories now stack on top of K-12 tuition at public, private, or religious elementary and secondary schools.
Can I use a 529 to pay student loans in 2026?
Yes. Under IRC §529(c)(9), added by SECURE Act 2019 §302, up to $10,000 lifetime per individual can be distributed from a 529 plan to pay principal or interest on qualified education loans. The $10,000 cap is per beneficiary AND per sibling - meaning a 529 owner can also distribute up to $10,000 to pay down a sibling's student loans. The lifetime cap is cumulative across all 529 accounts for the same individual. Interest paid via 529 distribution is NOT separately deductible under §221 (you cannot double-dip). The student loan must be a qualified education loan under §221(d). This rule applies to both federal and private student loans.
What is the 529-to-Roth IRA rollover under SECURE 2.0?
SECURE 2.0 Act §126 (effective January 1, 2024) allows up to $35,000 lifetime per beneficiary in tax-free direct trustee-to-trustee rollovers from a 529 plan to a Roth IRA owned by the 529 beneficiary. Five conditions apply: (1) the 529 account must have been open for at least 15 years; (2) contributions and earnings on contributions made in the last 5 years cannot be rolled over; (3) the annual rollover is capped at the Roth IRA contribution limit minus any other Roth or traditional IRA contributions for the year ($7,500 for 2026, $8,600 if age 50+); (4) the beneficiary must have earned income at least equal to the rollover amount; (5) the rollover must be a direct trustee-to-trustee transfer. The $35,000 lifetime cap is per beneficiary, not per 529 account. Income limits on Roth IRA contributions do NOT apply to these rollovers.
Are 529 contributions tax-deductible?
No, 529 contributions are not deductible for federal income tax purposes. The federal tax benefit comes entirely from the inside-account tax-free growth and the tax-free qualified distribution under IRC §529(c)(3)(B). However, most states with an income tax (approximately 35 plus DC) offer a state income tax deduction or credit for contributions to a 529 plan. Some states (Pennsylvania, Arizona, Kansas, Maine, Minnesota, Missouri, Montana, Ohio) offer "parity" deductions for contributions to any state's 529 plan; most states require contributions to the home state's plan. Annual state deduction caps range from about $1,000 to over $10,000 per filer. Contribution levels are also limited by federal gift tax rules: the 2026 annual exclusion is $19,000 per donor per beneficiary, and the 5-year forward election under IRC §529(c)(2)(B) allows a single $95,000 contribution treated as $19,000 per year over 5 years.
What happens if I take a non-qualified 529 distribution?
A non-qualified 529 distribution (one not used for qualified higher education expenses, K-12 expenses, apprenticeship, student loan repayment, postsecondary credentialing, or ABLE rollover) is subject to two federal tax consequences under IRC §529(c)(6). First, the earnings portion of the distribution (Form 1099-Q Box 2) is included in the recipient's gross income and taxed at the recipient's marginal federal rate. Second, the earnings portion is subject to a 10% additional tax. The basis portion (Box 3) is never taxed because it was already taxed before contribution. The 10% additional tax has four exceptions under §530(d)(4): scholarship-equivalent distributions (up to the amount of tax-free scholarship received), distributions on account of death, distributions on account of disability, and distributions for service academy attendance.
What is the 5-year forward gift tax election for 529?
Under IRC §529(c)(2)(B), a contributor to a 529 plan can elect to treat a single large contribution as if it were spread evenly over 5 years for federal gift tax purposes. For 2026, the annual gift tax exclusion is $19,000 per donor per recipient, so a single $95,000 contribution to a 529 can be treated as five $19,000 annual gifts and thereby use no lifetime gift tax exemption. Married couples electing gift-splitting can contribute up to $190,000 in one year. The election is made on Form 709 in the year of the contribution. If the contributor dies during the 5-year period, the unused portion is pulled back into the contributor's gross estate under §529(c)(4).
How do 529 plans coordinate with AOTC and LLC?
Under IRC §529(c)(3)(B)(v), the same qualified higher education expenses cannot be used to both qualify a 529 distribution as tax-free AND to claim the American Opportunity Tax Credit or Lifetime Learning Credit. The taxpayer must reduce the qualified expenses pool by the AOTC/LLC-claimed amount before testing the 529 distribution. The most common planning move: use $4,000 of out-of-pocket tuition to maximize AOTC (which produces $2,500 of credit), and use 529 distributions to cover the remaining tuition and qualified expenses. Failing to coordinate causes one of two errors: (1) double-counting that the IRS will catch on Form 8863 matching, or (2) wasting AOTC by using 529 dollars for the first $4,000 of tuition that should have been out-of-pocket.
What is Form 1099-Q and when do I get one?
Form 1099-Q (Payments from Qualified Education Programs Under Sections 529 and 530) is issued by the 529 plan administrator to report distributions during the calendar year. Box 1 reports the gross distribution amount; Box 2 reports the earnings portion; Box 3 reports the basis portion (return of contributions). Box 4 trustee-to-trustee transfer flag indicates whether the distribution was a rollover. The 1099-Q goes to the recipient of the distribution - usually the beneficiary if paid directly to the school or the beneficiary, or the account owner if paid directly to the owner. The IRS matches the 1099-Q to the beneficiary's or owner's tax return; if the distribution exceeds qualified expenses, the earnings portion is taxable on the recipient's return.
Did OBBBA change 529 plans for 2026?
Yes. OBBBA (P.L. 119-21, signed July 4, 2025) made three significant changes to IRC §529: (1) §70413 doubled the K-12 annual cap from $10,000 to $20,000 per beneficiary, effective for distributions after December 31, 2025. (2) §70413 also expanded what counts as qualified K-12 expenses for distributions after July 4, 2025 - now includes curriculum materials, books, online educational materials, tutoring fees, standardized test fees, AP and dual enrollment fees, and educational therapies for disabilities. (3) §70413 added qualified postsecondary credentialing expenses to the §529 qualified distribution definition for distributions after July 4, 2025 - covering professional licenses, certifications, technical credentials, and continuing education required to maintain existing credentials under Workforce Innovation and Opportunity Act (WIOA) directories, Department of Labor registered apprenticeships, and Veterans Benefits Administration WEAMS programs. Separately, OBBBA struck the January 1, 2026 sunset on §529 to ABLE account transfers, making the ABLE rollover permanent.
What to Do Next
If You Are Paying College Tuition
Sequence your payments to maximize AOTC under §25A. Pay the first $4,000 of tuition out-of-pocket to capture the full $2,500 AOTC, then use 529 for the rest. Use the Education Tax Credit Calculator to compute the AOTC vs LLC choice for your filing situation.
If You Are Paying K-12 Private School in 2026
The OBBBA §70413 expansion doubles the cap to $20,000 per beneficiary and adds tutoring, AP test fees, curriculum, and educational therapies as qualified expenses. Track distributions across all 529 accounts for the same child - the cap is aggregate, not per account. Distributions after July 4, 2025 use the expanded expense definitions.
If You Have a Leftover or Overfunded 529
Avoid the non-qualified distribution penalty. Options: (1) change the beneficiary to a sibling, niece, nephew, parent, or self under §529(e)(2); (2) use up to $10,000 lifetime to pay down the beneficiary's student loans; (3) roll up to $35,000 lifetime into the beneficiary's Roth IRA over multiple years under SECURE 2.0 §126 (if account is 15+ years old); (4) roll into an ABLE account if the beneficiary has a disability.
If You Want to Front-Load a Large Contribution
Use the 5-year forward gift tax election under §529(c)(2)(B). A single $95,000 contribution in 2026 can be treated as five $19,000 annual gifts; married gift-splitters can contribute $190,000. File Form 709 in the contribution year to make the election. The contribution comes out of your gross estate immediately - powerful for grandparent estate planning.