Hawaii 529 plan: no state deduction in 2026
Hawaii taxes income in twelve steps and gives nothing back on the way in: the HI529 case rests entirely on the way out.
In the 529 at age 18
$51,987
$3,796 more than the same money in a taxable account, plus $0 of Hawaii tax saved along the way.
| You put in | $36,000 |
| Growth, tax-free for school costs | $15,987 |
| Taxable account after tax | $48,191 |
| Hawaii tax saved, 12 years | $0 |
Taxable account: dividends taxed every year and the remaining gain taxed at sale, at the 2026 federal capital gains rate for this income, NIIT where it applies, and your state marginal rate.
| Year | Child’s age | Put in | 529 balance |
|---|---|---|---|
| 2 | 8 | $6,000 | $6,348 |
| 4 | 10 | $12,000 | $13,481 |
| 6 | 12 | $18,000 | $21,495 |
| 8 | 14 | $24,000 | $30,500 |
| 10 | 16 | $30,000 | $40,618 |
| 12 | 18 | $36,000 | $51,987 |
Worked out by Radif Partners · How we calculate · Hawaii rule read on October 19, 2026, brackets of tax year 2025 · not tax advice
Hawaii gives no state income tax deduction and no credit for money put into HI529, its college savings program, so a deposit made in 2026 does not lower the Hawaii return at all. The state does tax income, with twelve brackets that reach 11 % under the 2025 schedule, the latest one published. The value of the account is therefore on the earnings side: growth is not taxed each year, and withdrawals for college costs leave Hawaii tax untouched. A couple at $130,000 sits at 7.6 %, the rate a taxable brokerage account would pay on its dividends and gains. One trap is specific to Hawaii: withdrawals for K-12 expenses, qualified federally up to $20,000 a year from 2026, are Hawaii non-qualified withdrawals and their earnings are taxed by the state. HI529 accepts deposits until a beneficiary's accounts reach $305,000.
| Benefit for contributions | None |
|---|---|
| State plans (official names, no recommendation) | HI529 - Hawaii's College Savings Program |
| Account balance limit | $305,000 |
| K-12 withdrawals qualified for state tax | No |
| 529 to Roth IRA rollover qualified | Yes |
| Student loan payments qualified | Not stated by the state |
| Add-back on a rollover to another state’s plan | No |
Nothing deducted, so the shelter is the whole benefit
Neither the HI529 tax benefits page nor its plan disclosure lists a state deduction or credit for contributions. No official Hawaii statement saying so outright was found; the conclusion comes from that absence. The calculator at the top of this page is therefore a growth calculator, not a deduction one. It compares the 529 with a taxable account fed the same way and taxed at federal capital gains rates plus the Hawaii marginal rate for the income you enter.
With $250 a month from age 6 to 18 at an assumed 6 % a year, the 529 reaches about $51,987. The same money in a taxable account, for a joint couple at $130,000 paying 7.6 % to Hawaii on every dividend, ends near $48,191 after tax. The difference, $3,796, is the only Hawaii benefit this family gets, and it depends on the return you assume.
Hawaii rates are from the 2025 schedule
Marginal rates on this page come from the 2025 tax rate schedules of the Form N-11 instructions. Act 46 of 2024 changes the brackets in 2025, 2027 and 2029, so the 2026 schedule is expected to match 2025, but no official 2026 schedule was found. A single filer at $58,000 of Hawaii taxable income faces 7.6 %.
Private school bills from HI529: taxed by Hawaii
The October 2025 HI529 supplement describes the 2025 federal law: the $20,000 yearly K-12 limit from 2026, the longer list of K-12 costs and the new postsecondary credential expenses. It then says K-12 withdrawals remain Hawaii non-qualified withdrawals. Their earnings part goes onto the Hawaii return, even though the IRS treats the same withdrawal as tax-free. A single parent at $58,000 who takes $9,000 for tuition, a quarter of it earnings, adds $2,250 to Hawaii income and pays about $171 on it. The supplement does not single out credential programs as non-qualified for Hawaii.
K-12 tuition paid from HI529
Tax-free from the 529 this year (federal)
$9,000
| Federal cap per child, 2026 | $20,000 |
| Above the cap | $0 |
| Federal tax and 10 % on that part | $0 |
| Hawaii treatment | Not qualified: add-back or tax |
Loans, Roth rollovers and leaving the plan
For student loan repayments the HI529 disclosure says Hawaii statutes do not directly address the state tax treatment, so the question stays open. A rollover from HI529 to a Roth IRA for the beneficiary is described as free of Hawaii tax on its earnings. Since there is no deduction, there is nothing to recapture when money moves to another state's plan or is spent on something else; only earnings of a non-qualified withdrawal are taxed. A family that later moves to a state with a deduction would look at that state's rules for new deposits, as the out-of-state plan page explains.
HI529 money spent on something else
Tax on this withdrawal
$2,079
| Earnings part | $5,250 |
| Federal income tax at 22 % | $1,155 |
| 10 % additional tax | $525 |
| Hawaii tax and add-back | $399 |