A 529 plan lets a family save for education with the tax code doing part of the work: contributions are made with after-tax money, the investments grow without annual tax, and withdrawals for qualified education expenses come out entirely tax-free at the federal level. That simple deal sits inside a set of rules about who can contribute, how much, what counts as education, and what happens if the money is used for something else. This guide covers each rule with the figures that apply, and none that do not.

What a 529 plan is, and the two kinds

A 529 plan is a tax-advantaged savings account established under Section 529 of the Internal Revenue Code and sponsored by a state or educational institution. An account owner, usually a parent or grandparent, opens the account for a designated beneficiary, usually a child, contributes money, chooses investments from the plan’s menu, and later withdraws money for the beneficiary’s education. The owner keeps control throughout: unlike a custodial account, the beneficiary does not gain control at a set age, and the owner can change the beneficiary to another eligible family member at any time. Anyone can contribute to an account once it exists, including grandparents, other relatives, and friends, and there is no income limit on who may contribute or own an account. The federal tax benefit is entirely on the growth and the withdrawal: no federal deduction for contributing, tax-free growth while the money is invested, and tax-free withdrawals for qualified education expenses.

There are two kinds of 529 plan, and they do very different things. Education savings plans, the kind this guide and the calculator cover, invest contributions in a portfolio, usually age-based portfolios that grow more conservative as the beneficiary approaches college age, plus static portfolio options. The balance rises and falls with the investments, and the amount available for college depends on contributions, returns, and fees. Prepaid tuition plans, offered by a smaller number of states and institutions, let the owner buy tuition credits at today’s prices for future use at participating schools, locking in the tuition rate rather than investing for growth. Prepaid plans are state-specific, some are closed to new enrolment, and their value depends on where the beneficiary eventually studies, so they suit families fairly certain about the school or system. When people say 529 plan without qualification, they almost always mean the savings kind, and every figure in this guide refers to savings plans unless prepaid is named.

Eligible institutions matter to both kinds. For higher-education expenses, the school must be eligible to participate in federal student aid programs under Title IV of the Higher Education Act, which covers most accredited colleges, universities, vocational schools, and many institutions abroad. The practical check is the school’s Federal School Code listing; if a school participates in federal student aid, it generally qualifies. K-12 schools do not need Title IV certification for the K-12 provision, which covers tuition and, from 2026, a wider set of expenses at any public, private, or religious elementary or secondary school. Registered apprenticeship programs must be registered and certified with the U.S. Department of Labor. An expense at a school that is not eligible is not qualified, however educational it feels, so the eligibility check belongs before the withdrawal, not after it.

Contributions, gift tax, and superfunding

Federal law sets no annual contribution limit for 529 plans and no lifetime federal limit. The binding ceiling is the aggregate limit set by each state plan, the maximum total balance allowed across all accounts for one beneficiary in that state’s plan, which ranges roughly from $235,000 to over $550,000 depending on the state. Once an account reaches its plan’s aggregate limit, further contributions are generally not accepted until the balance falls, although earnings can carry it above the limit. The limit is per beneficiary per state plan, so families using more than one state’s plan should check how the plans interact. The calculator on this page models the balance path, not the limit; the plan’s own disclosure states the current aggregate figure, and it changes occasionally, so confirm it in the plan documents before a large contribution.

Gift tax is the limit most families actually meet. A contribution to a 529 plan is legally a completed gift to the beneficiary, even though the owner retains control of the account. Gifts up to the annual exclusion need no gift-tax return and use none of the lifetime exemption. For 2026 the annual exclusion is $19,000 per donor per recipient, so one grandparent can give $19,000 to a grandchild’s 529 plan, and a married couple electing to split gifts can give $38,000, without any filing. Above the exclusion, the donor files Form 709, and the excess counts against the lifetime gift and estate tax exemption; no tax is usually owed until that exemption, which is very large, is exhausted. The exclusion is per donor and per recipient, so two grandparents and two parents can each use their own exclusion for the same child in the same year.

Superfunding is the 529-specific exception that lets a donor front-load five years of exclusions at once. By electing on Form 709 to treat a lump sum as five equal annual gifts, one donor can contribute up to $95,000 for 2026, five times $19,000, in a single year, and a married couple splitting gifts can contribute up to $190,000, without gift tax and without using lifetime exemption. The election consumes the donor’s annual exclusion for that beneficiary for the five-year period, so no further tax-free gifts to that beneficiary should be made during those years without filing consequences, and if the donor dies before the five years run, the portion attributable to years after death is pulled back into the taxable estate. Superfunding is a gift-tax election, not a 529 contribution limit: the plan’s aggregate balance limit still applies, and the money is invested immediately, which is the point, since a lump sum at birth has up to 18 years to compound. It suits families with the means to move a large sum early and the discipline to leave it invested; it is not required to use a 529 plan well, and regular monthly contributions remain the normal path.

Contributions can be made by anyone, at any time, in any amount the plan accepts, and there is no annual deadline comparable to an IRA: a contribution counts in the year it is made, and state deduction deadlines, where a state offers one, follow the state’s own rules, with some states allowing contributions up to the tax filing date to count for the prior year. There is no requirement to contribute every year, no minimum that applies federally, and no penalty for stopping. The owner can also move money between plans by rollover, generally once per 12 months for the same beneficiary without changing beneficiary, and can change the beneficiary to a qualifying family member, including siblings, parents, first cousins, nieces and nephews, and the owner themselves, without tax consequences. That flexibility is part of the design: the money is committed to education in the family, not to one child’s one college choice.

The growth math: starting early beats saving more later

The calculator projects a balance from monthly contributions, an assumed return, fees, and time, using the future-value-of-an-annuity formula with monthly compounding. The arithmetic is unforgiving in one direction and generous in the other: time matters more than the monthly amount, because every contribution compounds for the years remaining after it is made. At a 6% annual return, $200 a month from birth for 18 years grows to about $77,471, of which $43,200 is contributions and about $34,271 is growth. The same $200 a month started at age 5, with only 13 years to run, reaches about $47,089, a shortfall of roughly $30,000 for five missing years of early contributions totalling only $12,000. Starting late cannot be repaired by saving a little more later: the 13-year plan would need about $329 a month to reach the same $77,471, nearly two-thirds more each month, because the earliest contributions, the ones with the longest compounding runway, are gone.

Fees compound too, in the opposite direction. At 7% with no fee, $200 a month for 18 years reaches about $86,144. At 6%, the same contributions reach $77,471, a gap of about $8,673 that is entirely the 1 percentage point difference. Plan fees, fund expenses, and advisor charges all come out of the return, so comparing plans means comparing total annual cost on the same portfolio, not headline features. A plan charging 1% needs a full point of extra return every year just to stand still against a plan charging nothing, and over 18 years that point costs more than two years of contributions. Age-based portfolios add a second, quieter effect: as the beneficiary approaches college age, the portfolio shifts toward bonds and capital preservation, so the effective return in the final years is lower than the headline equity return, and the calculator’s single return assumption should be read as an average across the whole horizon, not a promise for any single year.

None of these figures is a forecast. Returns vary year to year, and an 18-year projection at a fixed 6% is a planning illustration, not a prediction; a run of poor early years followed by good ones produces a different balance from the reverse order, even at the same average return, because contributions made during the poor years buy in cheaply. The honest use of the calculator is comparative: same contributions, different start ages; same start, different returns; same return, different fees. The ranking of those choices is stable across plausible return assumptions, even though the dollar figures move. Treat any single projected balance as the centre of a wide range, keep the contribution habit steady through market falls, and revisit the plan as college approaches, when the remaining horizon is short and preservation matters more than growth.

Qualified expenses, in full

A withdrawal is tax-free at the federal level only to the extent it pays qualified education expenses, and only up to the amount of those expenses not already covered by tax-free assistance such as scholarships, grants, and veterans’ benefits. The core list for higher education is tuition and required fees, books, supplies, and equipment required for enrolment or attendance, and computers, peripheral equipment, software, and internet access used primarily by the beneficiary while enrolled. Room and board qualify when the student is enrolled at least half-time, up to the school’s published cost-of-attendance allowance for room and board, or the actual amount charged for institution-owned housing if higher. A student living off campus cannot claim room and board beyond the school’s allowance, and a student enrolled less than half-time cannot claim room and board at all, although tuition and books still qualify. Keep the school’s cost-of-attendance figures with the withdrawal records; they are the cap the IRS would ask about.

Beyond the core list, several categories qualify that families often miss. Fees, books, supplies, and equipment for a registered apprenticeship program qualify, which makes 529 money usable for trade and vocational routes, not only four-year degrees. Up to $10,000 over the beneficiary’s lifetime can be used for qualified student loan repayments, including principal and interest, and a further $10,000 per sibling of the beneficiary can be used for that sibling’s loans, subject to the lifetime cap per person. From 2026, postsecondary credentialing programs recognised under the Workforce Innovation and Opportunity Act qualify for tuition, fees, books, supplies, equipment, and required testing and continuing-education fees. Expenses must be incurred in the same tax year as the withdrawal in the usual reading of the rules, so a withdrawal taken in December for a spring bill needs care: match withdrawals to the year the expense is paid, and keep receipts that show the date.

K-12 expenses have their own cap and their own list. Since 2018, up to $10,000 per beneficiary per year could be withdrawn tax-free for K-12 tuition. The One Big Beautiful Bill Act, signed in July 2025, doubled the annual cap to $20,000 per beneficiary for distributions from 1 January 2026, and widened the qualifying list beyond tuition to include curriculum and curricular materials, books and instructional materials, tutoring by a qualified instructor, standardised test fees, dual-enrolment fees, and educational therapies for students with disabilities, with room and board remaining college-only. The cap is per student across all of their 529 accounts, not per account, and state conformity varies: some states do not recognise the federal K-12 provision and may treat a K-12 withdrawal as non-qualified for state tax purposes, with recapture of any state deduction claimed. Check the state plan’s treatment before using 529 money for K-12, especially in a non-conforming state, and remember that spending the account on K-12 leaves less compounding for college, which is the trade-off the doubled cap does not remove.

Coordination rules prevent double benefits. The same dollar of expense cannot support both a tax-free 529 withdrawal and an education tax credit such as the American Opportunity Credit or the Lifetime Learning Credit; expenses used for a credit must be excluded from the qualified-expense total when sizing a withdrawal, or the withdrawal becomes partly non-qualified. Scholarships and tax-free grants similarly reduce the qualified expenses available: if a $20,000 tuition bill is covered by a $12,000 scholarship, only $8,000 of qualified expenses remain for tax-free withdrawal purposes, although the scholarship exception below waives the penalty on a withdrawal up to the scholarship amount. The American Opportunity Credit coordination is usually the larger prize, since the credit is worth up to $2,500 a year and the 529 benefit on the same dollars is only the tax on the earnings portion. Plan the two together each year, in that order: credits first, then 529 withdrawals for the remaining expenses.

What happens to money not used for education

A non-qualified withdrawal is not a disaster, and it is not taxed on the whole amount. Every withdrawal is split pro rata between contributions and earnings: the contribution portion returns tax-free and penalty-free, because it was after-tax money, and only the earnings portion is taxable as ordinary income to the recipient, usually the beneficiary or the owner depending on who receives the distribution, plus a 10% federal additional tax on the earnings. On an account holding $43,200 of contributions and $34,271 of earnings, a $10,000 non-qualified withdrawal is about 44.3 percent earnings, so about $4,430 is taxable income and the additional tax is about $443. State tax and possible recapture of state deductions sit on top, in states that gave a benefit. The penalty is on the earnings only, never on the contributions, which bounds the damage and is the reason overfunding a 529 is a manageable mistake rather than a trap.

Several exceptions waive the 10% additional tax, although the earnings remain taxable as income in most of them. Withdrawals up to the amount of a scholarship, fellowship, or tax-free grant are penalty-free, as are withdrawals made because the beneficiary died or became disabled, withdrawals for expenses that qualify for education credits, and withdrawals for attendance at a U.S. military academy. The scholarship exception is the workhorse: a child who earns a full scholarship has not wasted the 529 money, because the account can be drawn penalty-free up to the scholarship amount, with only income tax on the earnings, or the beneficiary can be changed to a sibling and the money kept tax-free for education. The SECURE 2.0 Roth rollover, covered in the companion guide, adds a further exit for leftover balances that meet its conditions. Between beneficiary changes, the scholarship exception, and the Roth rollover, a family that saves steadily and watches the balance rarely faces the full penalty on a large sum.

Record-keeping decides whether a withdrawal stays qualified. Keep the Form 1099-Q the plan issues, the school’s billing statements, receipts for books and equipment, the cost-of-attendance allowance for room and board, and scholarship award letters, for at least the period the return for that year can be examined. The IRS does not require the plan to verify that a withdrawal was qualified; the account owner attests to it on the tax return, and the records are the defence if the return is questioned. A common error is withdrawing in one year for expenses paid in another, or withdrawing the full bill after a scholarship covered part of it, both of which create a partly non-qualified withdrawal that could have been avoided by sizing the withdrawal to the year’s net qualified expenses. Withdraw last, after the bills and the aid are known, not first, when they are estimates.

State deductions, credits, and recapture

Federal tax treatment is uniform; state treatment is a patchwork, and it is where most 529 surprises live. More than thirty states offer a deduction or credit for contributions, usually only for contributions to that state’s own plan, each with its own cap, carryforward rules, and filing-status differences. Some states allow a deduction for contributions to any state’s plan, some allow none at all, and a few offer no state income tax against which a deduction would matter. The value of a deduction depends on the state marginal rate: a $5,000 deduction at a 5% state rate is worth $250, while the same deduction at a 9% rate is worth $450, before any recapture risk. Because the calculator on this page models the federal and balance picture, it claims nothing about any state’s deduction; the hub guide says so explicitly, and this guide repeats it, because a national guide that quoted one state’s deduction as if it were universal would mislead most readers.

Recapture is the state counterpart of the federal penalty. In states that gave a deduction or credit, a later non-qualified withdrawal, a rollover to another state’s plan, or a K-12 withdrawal in a non-conforming state can trigger recapture: the previously deducted amounts, or the earnings, are added back to state income, and in some states a penalty or interest applies. Beneficiary changes within the family generally do not trigger recapture, and qualified withdrawals do not, but moving the account to a different state’s plan for a better investment menu can cost the accumulated state benefit in the original state. The 529-to-Roth rollover has the same state risk: federal law treats it as qualified, but some states treat it as non-qualified for state purposes and recapture deductions claimed on the contributions rolled over. Before any rollover, beneficiary change across state plans, or K-12 withdrawal, check the current state plan disclosure and, for a large amount, a tax professional’s view of that state’s rules. State rules change, and plan disclosures are the authoritative source for the plan in question.

Choosing a plan and using the calculator

Choose a plan on four criteria, in this order: total cost, investment quality, state tax benefit, and convenience. Total cost means the plan’s administrative fee plus the underlying fund expenses, on the portfolio actually used; age-based portfolios in direct-sold plans are often the cheapest route, while advisor-sold plans add a layer of fees that must be justified by advice actually received. Investment quality means diversified, low-cost index options with a sensible age-based glide path, not a long menu of narrow funds. State tax benefit matters only if the home state offers one and only for that state’s plan, and its value should be weighed against any cost premium the home-state plan charges over a cheaper out-of-state plan: a $250 annual deduction value does not justify a 0.5% annual fee premium on a $100,000 balance, which costs $500 a year. Convenience, including the contribution interface, gifting links for relatives, and the quality of the withdrawal process, matters last, because it affects behaviour, and a plan that is easy to fund steadily beats a cheaper plan that is never funded.

Use the calculator comparatively. Run the actual monthly contribution at a modest return, such as 5% or 6%, and at a lower return, to see the range; run the same contributions starting now versus starting in two years, to price delay; run the chosen plan’s fee against a lower-fee alternative, to price cost. Then set the contribution at a level that survives a bad year without being stopped, automate it, and increase it when income rises, rather than setting a heroic amount that lapses. Review annually: the balance against the target, the portfolio’s glide path as the beneficiary ages, and the beneficiary’s likely path, since a child heading for an apprenticeship, a trade school, or a scholarship changes the target and the withdrawal plan. A 529 plan rewards steady funding and early starts far more than it rewards clever timing, and the calculator’s job is to make the steady path visible in dollars, year by year.

Frequently asked questions

What is a 529 plan?

A state-sponsored savings account for education costs. Contributions are after-tax, growth is tax-free, and withdrawals for qualified education expenses are tax-free at the federal level. The account owner keeps control and can change the beneficiary to another eligible family member.

Is there an annual contribution limit for 529 plans?

There is no federal annual limit. State plans set aggregate balance limits that vary by state. Gift tax is the practical limit: for 2026, gifts up to $19,000 per donor per beneficiary need no return, and superfunding allows up to $95,000 from one donor under a five-year election.

What expenses qualify for tax-free 529 withdrawals?

Tuition, fees, books, supplies, equipment, and room and board for at least half-time students at eligible institutions, registered apprenticeships, up to $10,000 of student loans over a lifetime, and K-12 expenses up to $20,000 a year from 2026.

What happens if 529 money is not used for education?

Only the earnings portion of a non-qualified withdrawal is taxed as income, plus a 10 percent federal additional tax on the earnings. Contributions come back tax-free. Exceptions waive the additional tax for scholarships, death, disability, and military academy attendance.

Can 529 funds be used for K-12 school?

Yes, up to $20,000 per beneficiary per year from 2026 under federal law, covering tuition and a wider set of expenses. Some states do not conform, so check the state plan treatment and possible recapture before withdrawing for K-12.

Do all states offer a tax deduction for 529 contributions?

No. More than thirty states offer a deduction or credit, usually only for their own plan, each with its own cap and recapture rules. Some states offer none. Check the home state plan disclosure for the current rules.