529 plans have the best tax deal in education savings: growth compounds untaxed and qualified withdrawals come out completely tax-free. The catch is the word qualified. Most of the money families accidentally penalize doesn't go to anything outrageous, it goes to rent above the school's housing allowance, or a health plan, or a parking decal, categories that sound educational but sit outside the rules. Here's the full map, including the 2025 and 2026 changes most older articles still get wrong.
Yes, and it's one of the most common questions for a reason: housing is the biggest line after tuition. Two conditions apply. First, the student must be enrolled at least half-time in a degree or credential program. Drop to a single credit and housing stops being qualified that term. Second, there's a ceiling: the withdrawal can't exceed the greater of the school's actual charge for housing and meals or the room and board allowance inside its published cost of attendance.
That second condition is where off-campus students get caught. If your school's allowance is $9,000 and your apartment plus groceries runs $10,800, only $9,000 of it can come from the 529. The remaining $1,800 is a non-qualified withdrawal, and its earnings portion gets taxed and penalized. Living cheap is the only direction that never hurts: spend $7,500 off-campus and all of it is covered.
For a college student, yes. The rules cover computers, peripheral equipment (printers, monitors, a laptop sleeve if a professor requires one in writing), educational software, and internet access, as long as the beneficiary is the primary user and is enrolled at the time. A laptop bought the summer before freshman year is fine if enrollment is coming. The K-12 side is different: for students in kindergarten through 12th grade, 529 money pays tuition only. No laptops, no calculators, no uniforms.
The K-12 allowance, added in 2018, started at $10,000 per beneficiary per year for tuition at private or religious schools. The One Big Beautiful Bill Act, signed July 4, 2025, doubled that to $20,000 per year beginning with 2026 distributions. Two cautions before you build a plan around it. Several states, California most prominently, never conformed to the K-12 expansion and treat those withdrawals as non-qualified for state income tax. And the cap is per student per year across all 529 accounts, so you can't multiply it by opening three plans.
Yes, since the SECURE Act in 2019, with a lifetime cap: $10,000 of principal and interest per borrower after the beneficiary finishes school. The drafting quirk worth knowing is that each sibling of the beneficiary gets their own $10,000. A family with three kids holding $30,000 of combined loans can legitimately clear all of it through the eldest child's 529, $10,000 per sibling. It's per-borrower lifetime money, so once used, it's gone.
July 4, 2025 added a category that has nothing to do with college enrollment: qualified credentialing expenses, up to $10,000 lifetime. These are the tuition, exam, and material costs of earning a recognized postsecondary credential, think journeyman licenses, IT certifications, cosmetology boards. It gives leftover 529 money a purpose for kids who skip the four-year route. The lifetime cap is per beneficiary and separate from the student-loan $10,000.
Tick off tuition, rent, laptops, K-12, or loan payments and see exactly what's qualified, what's capped, and what the penalty would cost.
Open the 529 Qualified Expense Checker →The pattern is consistent: the IRS pays for enrollment and attendance, not for living or lifestyle. When in doubt, ask whether the college itself bills the item as a condition of enrollment.
Less than most families fear, which is why it's worth knowing the formula. Only the earnings portion of a bad withdrawal is punished; your contributions return tax-free because you already paid tax on them. Take a $4,100 non-qualified withdrawal from an account that's 40% earnings: $1,640 of earnings, taxed at your bracket (say 22%, or $361) plus the 10% penalty ($164). Total damage: about $525, roughly 13% of the withdrawal. Real money, but not the catastrophe the word "penalty" suggests. There's also an escape hatch: if the student received a scholarship, you can withdraw up to the scholarship amount penalty-free, though the earnings still get taxed as income.
The American Opportunity Tax Credit needs $4,000 of qualified expenses paid out of pocket. Expenses covered by a 529 withdrawal don't count toward it. The standard play for families in AOTC range: pay the first $4,000 of tuition with cash or loans, then bring in 529 money for everything above it. For families above the AOTC income phase-out ($180,000 modified AGI for joint filers), this doesn't matter and 529 can cover everything. If your head is spinning, the education tax credit calculator runs the AOTC-versus-Lifetime-Learning comparison against your actual numbers.
Two more planning stops: leftover balance? The 529 to Roth rollover calculator shows how SECURE 2.0 lets you move up to $35,000 into the student's Roth IRA. Still filling out aid forms? The FAFSA SAI calculator estimates your Student Aid Index, which determines whether the 529 gets assessed as a parental asset (it does, at up to 5.64%).
Yes, with two conditions. The student must be enrolled at least half-time, and the withdrawal can't exceed the greater of what the school actually charges for housing and meals or the room and board allowance in its published cost of attendance. Off-campus living counts too, but only up to that allowance.
For college, yes. Computers, peripherals, software, and internet access are qualified as long as the student uses them primarily while enrolled. For K-12 students, no: the K-12 expansion covers tuition only.
$10,000 per beneficiary per year through 2025. Starting with 2026 distributions, the One Big Beautiful Bill Act doubled it to $20,000 per year. Some states, California included, have not conformed and tax these withdrawals for state purposes.
Up to $10,000 of lifetime principal and interest per beneficiary, plus a separate $10,000 lifetime for each of the beneficiary's siblings. Interest and principal both count toward the same cap.
The earnings portion of the withdrawal is taxed as ordinary income and owes an extra 10% federal penalty. Contributions come out tax-free since they were made with after-tax money. Scholarship recipients get an exception: penalty-free withdrawals up to the scholarship amount, though the earnings still get taxed.