The Maryland 529 Guide: Tax Deductions, Carry-Forward Strategy & How to Invest

After a recent Women’s Wealth Summit workshop, one topic kept coming up in the follow-up messages: 529 accounts. So I’m writing this up properly — starting with Maryland.

This is Part 1 of a two-part series. Part 2 covers Virginia Invest529 in detail.

What Is a 529 Plan — and Why Does It Actually Matter?

A 529 plan is a tax-advantaged savings account built for education expenses. You contribute after-tax dollars, the money grows inside the account, and when you withdraw it for qualified education expenses — tuition, room and board, books, fees, and more — you pay zero federal tax on the gains.

That last part is the real story. Not the state tax deduction (though that helps too). The fact that years of investment growth can come out completely tax-free is one of the most powerful and underused financial planning tools available to American families.

If you live in Maryland, the state tax deductions add another meaningful layer of savings on top.

How the Maryland 529 State Tax Deduction Works

Maryland residents who contribute to the Maryland College Investment Plan can deduct those contributions from their Maryland state taxable income — reducing both state and county tax.

Here’s what the deduction looks like for 2026:

Maryland residents can subtract up to $2,500 in contributions per beneficiary per year from their Maryland state taxable income for both the Prepaid College Trust and College Investment Plan.

For a household in Montgomery County, each $2,500 deduction saves approximately $223 per year (5.75% state tax+ 3.2% county tax= 8.95%). These deductions apply to Maryland state income taxes only — they have no effect on your federal return.

The Carry-Forward Rule: Your 10-Year Window

Maryland allows you to carry forward unused deduction amounts for up to 10 years. This means you can make a larger upfront contribution and deduct $2,500 per year over the following decade.

What About Contributing More?

The maximum one-time contribution under federal gift tax rules is $95,000 per person in 2026 (five years of the $19,000 annual gift exclusion combined). Important caveat: Maryland’s carry-forward expires after 10 years.

Contribute $25,000 for one child in a single year, and you can deduct $2,500 per year for exactly 10 years — no deduction expires, nothing is wasted.

For a married couple with one child: $50,000 total ($25,000 per person).

The Real Benefit for Your 529: Tax-Free Growth

The state deduction saves real money — but it’s not the headline. The bigger benefit is what happens to the money inside the account over time.

Assume a Maryland family with household income around $300,000 invests $50,000 in a growth-oriented account, earning roughly 8% per year for 10 years.

Scenario A — 529 Aggressive Growth:

•  $50,000 grows to $108,000

•  Tax-free withdrawal for tuition

Scenario B — Standard taxable brokerage account (same investment):

•  $50,000 grows to $108 ,000

•  Long-term capital tax rate: ~27.8%  (Federal LTCG 15% + NIIT 3.8% + MD state + county ~9%)

•  Tax owed: approximately $16,124

•  After tax: approximately $91,876

The 529 puts roughly $16,000 more in your pocket per child.

Maryland 529 Investment Options

The Maryland College Investment Plan is managed by T. Rowe Price and offers two investment approaches:

1. Enrollment-Based Portfolios (Target Date)

Built around your child’s expected college start year. The portfolio starts equity-heavy for growth and gradually shifts toward bonds as the target year approaches. Best for parents who want a hands-off, set-it-and-forget-it approach.

2. Fixed Portfolios

You choose a specific stock/bond mix and it stays there. You can adjust your allocation up to twice per year per beneficiary. Best for parents who want full control over their investment mix.

My own choice: My kids are in public elementary school — I’m content with public school through middle school, but I’m genuinely drawn to strong boarding high schools. With a 7-plus year horizon, I’ve chosen the most aggressive available option. I want every dollar compounding as hard as possible.

What If You Move to Another State?

You are never required to close or roll over your Maryland 529 when you move. The account continues growing tax-free, and withdrawals for qualified education remain federal-tax-free regardless of your new state.

· After moving: New contributions no longer qualify for a Maryland deduction. The existing account stays open and keeps growing.

· Unused carry-forward: Cannot be claimed once you’re no longer a Maryland resident.

· Rolling over: Maryland does not recapture deductions on a qualified rollover to another state’s 529, but you lose any remaining carry-forward.

· Smartest move: Keep the Maryland account open. Open a new account in your new state. Direct future contributions to the new plan.

Disclaimer: This article is for educational and informational purposes only and does not constitute investment, tax, legal, or insurance advice. Any strategies discussed may not be suitable for every individual and may involve risks, including the possible loss of principal. Please consult your financial advisor, tax professional, and/or attorney regarding your specific situation before making any financial decisions. Past performance is not indicative of future results.