How much can I deduct for a 529 plan in Rhode Island?

Rhode Island lets you deduct up to $500 per year ($1,000 if married filing jointly) for contributions to a CollegeBound (Rhode Island) 529 plan. The deduction reduces your Rhode Island taxable income, not your tax bill dollar-for-dollar, so the actual saving depends on your marginal rate.

Can I carry forward contributions above the cap?

Yes. Rhode Island is one of the few states that allows you to carry forward contributions above the annual cap to future tax years until they are fully deducted. So a large lump-sum contribution is not wasted — the excess just shifts to later years.

Does the deduction apply to out-of-state 529 plans?

No. The Rhode Island deduction applies only to contributions made to a Rhode Island-sponsored CollegeBound 529 plan. Contributions to another state's 529 program do not qualify for the Rhode Island state income tax deduction.

What is Rhode Island's top income tax rate?

Rhode Island has a graduated income tax with three brackets: 3.75%, 4.75%, and a top rate of 5.99%. Most savers should enter their marginal rate (the rate on their last dollar of income), which determines how much each deductible dollar saves.

Is this calculator tax advice?

No. This tool gives a good-faith estimate using the published Rhode Island deduction cap and your inputs. It does not account for income phase-outs, other modifications, or your full return. Confirm your specific situation at tax.ri.gov or with a tax professional.

Rhode Island 529 Plan Tax Benefit Calculator

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Rhode Island rewards college savers with a state income tax deduction for contributions to its CollegeBound 529 plans. You can deduct up to $500 per year ($1,000 if married filing jointly), and — unusually — any contributions above the cap carry forward to future tax years. This tool estimates the state tax you save based on your contribution and marginal rate.

How it works

The deduction is capped, the excess carries forward, and your saving is the deductible amount times your marginal Rhode Island rate:

deductible   = min(contribution, cap)        // cap = $500, or $1,000 MFJ
carryforward = max(0, contribution − cap)     // shifts to future years
tax saving   = deductible × marginal rate

Because the benefit is a deduction (not a credit), it reduces your taxable income, so each deductible dollar saves you your marginal-rate fraction of a dollar — at the top 5.99% rate, the full $1,000 joint deduction saves about $59.90 in state tax.

Example and notes

A married couple contributing $1,500 in one year, at the 5.99% top rate: they deduct the capped $1,000 this year and carry forward the remaining $500 to a future year. This year’s saving is 1,000 × 0.0599 = 59.90 dollars, with more to come when the carryforward is used. The deduction only applies to Rhode Island’s CollegeBound plan — out-of-state 529s do not qualify. This is an estimate; confirm current caps and rules at tax.ri.gov.