Illinois 529 tax deduction in 2026
One flat rate, one cap per return, and three in-state programs that qualify. The math is short; the traps are on the way out.
Illinois tax saved on this contribution
$297
5.0 % of what you put in comes back on your 2026 return.
| Subtracted from state income | $6,000 |
| Your state marginal rate | 4.95 % |
| Cap that applies this year | $20,000 |
| Back per $1,000 contributed | $50 |
Illinois: Subtraction for total combined contributions to Bright Start, Bright Directions and College Illinois! up to $10,000 per tax year ($20,000 on a married joint return), regardless of number of accounts; contributions to other states' plans do not qualify; no carryforward of excess. Read on 2026-10-19. No federal deduction exists for 529 contributions.
| Taxable income | Marginal rate | Tax saved |
|---|---|---|
| $50,000 | 4.95 % | $297 |
| $100,000 | 4.95 % | $297 |
| $200,000 | 4.95 % | $297 |
| $400,000 | 4.95 % | $297 |
Worked out by Radif Partners · How we calculate · Illinois rule read on October 19, 2026, brackets of tax year 2026 · not tax advice
An Illinois taxpayer can subtract up to $10,000 of contributions to Bright Start, Bright Directions or College Illinois! from state income each year, or $20,000 on a joint return. Because Illinois taxes income at a flat 4.95 %, every deducted dollar is worth the same to everyone: a couple who puts in the full $20,000 saves $990 on the return, whatever their income. The cap is per return, not per child, so a second child does not raise it, and amounts above the cap do not carry forward to later years. Contributions to another state's 529 earn nothing in Illinois. The deduction comes back as income if the money is withdrawn for a non-qualified purpose, rolled to another state's plan, or, unlike the federal rule, spent on K-12 costs or credential programs, which Illinois does not treat as qualified.
| Benefit for contributions | Deduction |
|---|---|
| Cap | $10,000 single, $20,000 joint per return |
| Another state’s plan counts | No, in-state plan only |
| State plans (official names, no recommendation) | Bright Start Direct-Sold College Savings Program, Bright Directions Advisor-Guided 529 College Savings Program, College Illinois! Prepaid Tuition Program |
| Account balance limit | $550,000 |
| K-12 withdrawals qualified for state tax | No |
| 529 to Roth IRA rollover qualified | Yes |
| Student loan payments qualified | Yes |
| Add-back on a rollover to another state’s plan | Yes |
A flat rate makes the answer the same for everyone
In most states the value of a 529 deduction depends on your bracket. Illinois has one rate, 4.95 %, so a dollar deducted returns $50 per $1,000 for a teacher and a surgeon alike. The only variable left is how much you put in, up to the cap. A single parent with $62,000 of income who sets aside $200 a month, $2,400 for the year, gets $119 back. A couple at $160,000 who reach $20,000 get $990.
Your Illinois contribution
Illinois tax saved on this contribution
$119
| Subtracted from state income | $2,400 |
| Your state marginal rate | 4.95 % |
| Cap that applies this year | $10,000 |
| Back per $1,000 contributed | $49 |
One cap per return, whatever the number of children
The Illinois Schedule M instructions set the limit on the total contributed to Illinois plans during the year, across all accounts. A family with two children who each receive $15,000 still deducts $20,000 on a joint return, and saves $990. Contributions above the cap are not lost as savings, they simply earn no Illinois deduction, and the Bright Start taxpayer guide says the excess cannot be carried into later years. A family that wants to deduct more over time spreads its deposits: $20,000 in December and another $20,000 in January lands in two tax years.
Another state's plan earns nothing here
Illinois gives no parity: only Bright Start, Bright Directions and College Illinois! count. A couple at $160,000 who put $8,000 a year in another state's plan give up $396 a year of Illinois tax, $5,544 over fourteen years. Out of state, the deduction is $0. That gap is what lower fees elsewhere would have to beat. The calculator below spreads it over the years and turns it into a yearly return.
Illinois plan or another one
Lost by leaving the Illinois plan
$5,544
| Yearly saving, home plan | $396 |
| Yearly saving, other plan | $0 |
| Gap over the years | $5,544 |
Where Illinois parts with federal law
The 2025 federal law raised the K-12 cap to $20,000 and added credential programs to the qualified list. The Bright Start plan description supplement dated July 1, 2026 states that both remain non-qualified for Illinois tax purposes. A K-12 withdrawal is free of federal tax up to the cap, yet Illinois treats it as a non-qualified withdrawal and adds back the deductions taken on that money. The same supplement treats student loan repayments, apprenticeship costs and rollovers to a Roth IRA as qualified for Illinois. The K-12 page works through a family paying private school tuition from an Illinois account.
Leaving is the second trap. Moving an Illinois account to another state's plan brings back, as Illinois income, the smaller of the deductions claimed or the amount transferred. A family that deducted $30,000 over the years and then rolls the account elsewhere owes about $1,485 in Illinois tax.
Illinois add-back if the account moves
Illinois tax if the deductions come back
$1,485
| Amount added back | $30,000 |
| Your state marginal rate | 4.95 % |
Balance limit and the three programs
Illinois plans accept contributions until the accounts of one beneficiary reach $550,000, the limit in the Bright Start plan description from January 31, 2026. Bright Start is sold directly, Bright Directions through advisors, and College Illinois! is the prepaid tuition program. Contributions to any of the three add up toward the same yearly deduction cap, so a family using two of them does not get two caps.