How to Calculate 529 College Savings
A 529 plan is a tax-advantaged savings account for education expenses. Contributions grow tax-free, and withdrawals for qualified education expenses (tuition, room, board, books) are also tax-free. Understanding how much to save is critical given the rising cost of college.
Projecting Future College Costs
Future Cost = Current Annual Cost × (1 + inflation rate)ⁿ
Where n is years until enrollment.
If college currently costs $35,000/year and education inflation is 5%/year, in 10 years: $35,000 × (1.05)¹⁰ = $35,000 × 1.629 = $57,000/year ($228,000 for 4 years)
Monthly Savings Needed
Monthly Savings = FV × r / [(1 + r)ⁿ − 1]
Where FV is the target amount, r is the monthly investment return, and n is the number of months.
Example: You need $228,000 in 10 years with a 7% annual return (0.583%/month):
Monthly = $228,000 × 0.00583 / [(1.00583)¹²⁰ − 1] = $1,329 / (2.009 − 1) = $1,329 / 1.009 = $1,317/month
529 Tax Benefits
- Federal: No federal deduction, but tax-free growth and withdrawals
- State: 35+ states offer state income tax deductions on contributions
- Gift tax: Contributions up to $18,000/year ($36,000 married) avoid gift tax
- Superfunding: 5-year gift tax averaging allows up to $90,000 lump sum
What Happens If Your Child Doesn't Go to College
The SECURE 2.0 Act (2022) now allows rolling up to $35,000 of unused 529 funds into a Roth IRA for the beneficiary (subject to annual Roth IRA limits). This removes much of the risk of over-saving.
Use our 529 college savings calculator to find your monthly target.