What is the District of Columbia 529 deduction limit?

The District of Columbia generally allows a deduction of up to 4,000 dollars per year for a single filer and up to 8,000 dollars for married filing jointly. Contributions above the cap can typically be carried forward to future years, subject to the same annual limit.

Can I carry forward excess 529 contributions in the District of Columbia?

Yes. The District of Columbia allows contributions above the annual deduction cap to be carried forward and deducted in future tax years, usually for up to five years. This lets larger one-time contributions be deducted gradually within the annual limits.

How much will the District of Columbia deduction save me?

The saving equals your deductible contribution multiplied by your District of Columbia marginal income tax rate. With a graduated rate that can exceed 10 percent at higher incomes, an 8,000 dollar joint deduction can save several hundred dollars in District tax.

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

No. The District of Columbia deduction is limited to contributions to the DC College Savings Plan. Contributions to another state's 529 plan do not qualify for the District deduction, even though the federal tax-free growth benefit still applies.

District of Columbia 529 Plan Tax Benefit Calculator

Q: Does the District of Columbia offer a 529 tax deduction?

Yes. The District of Columbia allows residents to deduct contributions to the DC College Savings Plan from District taxable income, up to an annual cap. The deduction applies to the District-sponsored plan, not to out-of-state 529 plans.

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The District of Columbia lets residents deduct contributions to the DC College Savings Plan from District taxable income, up to an annual cap. Amounts above the cap can generally be carried forward to future years. This tool estimates your District tax saving and any carryforward.

How it works

The deductible amount is capped at the District limit for your filing status, and the saving is that deductible times your marginal rate:

deductible  = min(contribution, cap)
carryforward = max(0, contribution − cap)
tax saving  = deductible × marginal rate

The District of Columbia cap is generally 4,000 dollars for single filers and 8,000 dollars for married filing jointly, and only contributions to the DC plan qualify.

Example and notes

A married couple contributing 10,000 dollars at an 8.5 percent District marginal rate can deduct min(10,000, 8,000) = 8,000 dollars this year, saving 8,000 × 0.085 = 680 dollars, and carry forward the remaining 2,000 dollars to a future year. This is an estimate, not tax advice. The cap, carryforward window, and rates change, so confirm with the DC Office of Tax and Revenue and the DC College Savings Plan.