Cost Calculator AI
Education & SchoolTax-Advantaged

529 Plan Savings Calculator

Calculate 529 college savings growth, tax-free compound earnings, and estimate state income tax deduction advantages for qualified education costs.

Calculation Results

529 Tax-Advantaged Growth Formula

Final 529 Balance = FV(Monthly Contributions, r, n) | Tax Advantage = (Earnings × Federal Tax %) + Cumulative State Credits
  • 529 investment growth compounds completely free of federal and state income taxes.
  • Qualified withdrawals for college tuition, room/board, books, and K-12 tuition incur zero capital gains tax.
  • Estimates state income tax deduction or credit incentives offered by over 30 U.S. states.
  • Demonstrates the wealth gap between a 529 plan and a standard taxable investment account.

Step-by-Step Worked Example

Scenario: Parents contributing $350/month to a state 529 plan for 14 years with $8,000 starting balance at 6.5% return.

Calculation Steps:

  1. Total Principal Contributed: $8,000 + ($350 × 168) = $66,800.
  2. Final 529 Plan Balance: $119,425.
  3. Total Compound Investment Earnings: $119,425 − $66,800 = $52,625.
  4. Federal Taxes Saved on Growth (24%): $52,625 × 24% = $12,630.
  5. State Tax Credits Saved: $250 × 14 years = $3,500.
  6. Total Tax Advantage: $12,630 + $3,500 = $16,130 in pure tax savings.
Result: Your 529 plan reaches $119,425 ($52,625 in growth). You save an estimated $16,130 in combined federal and state taxes compared to a taxable account.

How to Use This Calculator

  1. 1Enter current 529 account balance and monthly deposit.
  2. 2Input years until your child enters college.
  3. 3Include your marginal federal income tax bracket and any state tax deduction credits.

Assumptions & Limitations

  • Withdrawals are used strictly for qualified higher education expenses (QHEE) under IRS Section 529.
  • State tax deduction rules and limits vary by resident state.

Frequently Asked Questions

What can 529 plan funds be spent on tax-free?

Qualified expenses include college tuition, mandatory fees, books, supplies, computers/software, campus room and board (for students enrolled at least half-time), up to $10,000/year for K-12 tuition, and up to $10,000 lifetime student loan repayment.

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