529 plans offer tax-advantaged growth for qualified education expenses. The earlier you start, the more compounding works — but the right monthly contribution depends on school cost assumptions and years until enrollment.
How much to save per month
Estimate total cost at enrollment (tuition + room/board inflated), subtract expected grants or current balance, then solve for monthly savings at a reasonable return assumption. The 529 calculator does this projection with your inputs.
What if costs or aid change
Run scenarios: lower return, higher inflation on tuition, or a partial scholarship. Excess 529 can change beneficiary to another family member — plan with some flexibility.
Do not skip retirement for college
Retirement first You can borrow for college; you cannot borrow for retirement. Fund employer match and IRA targets before overfunding 529.