How much should you contribute toward a future education goal?
Enter a cost amount in today’s dollars, the number of years until the goal, an annual cost-inflation assumption, current savings, a planned monthly deposit, and an annual account-growth assumption. The planner compounds the entered target and savings assumptions to one goal date, then estimates the monthly deposit that would close any modeled gap under those same assumptions.
The calculation does not fetch tuition data, estimate a student’s actual attendance costs, or forecast an investment return. Choose assumptions from information relevant to your own plan and examine other scenarios when they change. A 529 account’s available investments, fees, expenses, and terms depend on the plan; the SEC advises reviewing the plan offering materials for its fees and investment options. Source: SEC Investor.gov, An Introduction to 529 Plans (published 2026-01-28; accessed 2026-11-03).
How does the monthly contribution estimate work?
The planner first inflates the entered cost target by the rate and time you supply. It converts the entered effective annual account-growth assumption into an equivalent monthly rate, grows the current balance, and models equal deposits at each month-end. It solves that same future-value equation for the monthly contribution needed to meet the modeled goal. The calculation assumes a single goal date rather than a multi-year withdrawal schedule.
Negative account-growth assumptions are allowed down to −99.99% so that a user can examine a loss scenario. A zero growth assumption uses straight addition of contributions. Cost inflation is constrained to zero or above in this worksheet. These are calculation boundaries, not claims about likely costs or results.
Does this planner determine 529 tax treatment?
No. This tool does not determine whether a contribution or distribution qualifies for a tax benefit. The IRS describes qualified tuition programs, also called 529 plans, and explains that qualified expenses and distribution treatment depend on applicable rules and facts. Publication 970 also discusses coordination with education credits and other tax-free assistance. Check the current IRS guidance and the specific plan terms before making tax decisions. Source: IRS Publication 970 (2025), chapter 7 (accessed 2026-11-03).
Review the selected plan’s disclosures, fees, investment options, and state-specific rules. Investment values can fall, and actual deposits, costs, and returns can differ from the assumptions entered here. This planning tool is educational arithmetic, not financial, investment, tax, or legal advice.
Frequently asked questions
Does the planner predict future college costs?
No. You enter the current-dollar goal and inflation assumption; the future target is arithmetic based on those inputs.
Does it recommend a 529 plan or investment?
No. It does not compare plans, recommend investments, or determine tax treatment. Plan fees, options, and terms vary; review the plan’s own disclosures and official guidance.
When are monthly contributions modeled?
Contributions are modeled at each month-end. A different contribution timing pattern would change the result.
Are the assumed growth and inflation rates guaranteed?
No. They are user-entered scenario assumptions held constant for calculation purposes. Actual costs and investment results can differ.
Sources checked 2026-11-03: SEC Investor.gov, An Introduction to 529 Plans (2026-01-28) and IRS Publication 970 (2025).