How to read the 529 & college savings calculator

Turn an estimate of future education costs into a savings pace for each child, then read the family result while recognizing that projected results are not guaranteed.

Open the 529 & college calculator

What it calculates

This calculator answers one family-funding question: given the costs, timing, aid, funding share, current savings, future contributions, and return assumptions you enter, what monthly saving pace would put each child’s separate 529 account on track for its planned college withdrawals?

It projects up to five children. For each child it inflates the entered costs to the academic years when they occur, applies the selected scholarship treatment and parent funding percentage, projects that child’s account month by month, and compares the projected balance with the balance needed at enrollment. The family answer adds the required monthly pace for the separate accounts.

A 529 education savings plan is an investment account, not a guaranteed tuition price. Investment choices can gain or lose value, and fees reduce returns. This calculator models an education savings plan rather than a prepaid tuition plan.

The planning question

Unlike calculators with a “What should be calculated” choice, this page always solves for the same result: required monthly family savings. Change the assumptions to ask useful variations of that question:

How much of the cost will we fund?

Use the parent funding percentage and estimated scholarships to define the part assigned to the 529 plan.

Are current savings on track?

Compare the projected enrollment balance, gap, and funded percentage with the enrollment target.

What if costs or returns differ?

Copy the scenario, then vary education inflation or investment return. Treat both as assumptions, not forecasts.

How do several children fit together?

Add each child separately. The family answer totals the child-level saving paces but does not move money between their accounts.

Separate-child funding flow

Shared family scenarioEducation inflation, investment return, and optional state-benefit estimate

Child 1: separate 529Age, costs, aid, funding share, balance, and contributions

Child 2: separate 529Its own age, costs, aid, funding share, balance, and contributions

Family answerAdd the child-level saving paces. Combined balance, target, gap, and funded values are arithmetic totals, so inspect each child separately.

Major inputs

Current age and college start age: Set the number of months available to save before the first planned withdrawal. Starting earlier gives contributions and growth more time.
Tuition, room and board, and books/other: Today’s estimated annual amounts. The calculator applies education inflation to each future academic year. These entries may not cover every item in a school’s full cost of attendance.
Years attending: The number of academic-year withdrawals to model, from one through eight. Each withdrawal occurs at that academic year’s start.
Education inflation: The steady annual increase applied to the entered education costs. It is a scenario assumption; actual prices can rise unevenly.
Parents plan to fund: The percentage of modeled cost assigned to this 529 plan. It is a planning choice, not a prediction of what a school or aid formula will require.
Scholarships and grants: An estimated annual amount with its own growth rate. The order choice controls whether aid is subtracted before or after the parent funding percentage is applied.
Current balance and contribution: What is already in the child’s account and what is added monthly or annually through the last contribution period before enrollment.
Investment return: The steady annual return assumed for all 529 accounts in the scenario, compounded monthly before and during college. Use a return after expected investment and plan fees.
State 529 benefit estimate: An optional manual estimate of a state deduction or credit. State eligibility, rates, caps, recapture rules, and eligible plans vary; the estimate is reported separately and is not reinvested.

What the results mean

Future cost: The sum of tuition, room and board, and books/other in the nominal future dollars of each college year, before aid and before applying the parent funding percentage.
Planned funding share: The portion of those future costs assigned to the 529 after applying the funding percentage and the selected aid order.
Enrollment target: The account balance needed when college begins to support all planned withdrawals. It can be less than the sum of those withdrawals because the remaining balance is assumed to keep earning the entered return during college.
Projected at enrollment: The current balance plus modeled contributions and investment growth through enrollment, using the contribution amount you entered.
Deficit and surplus: Each child’s projected enrollment balance is compared with that child’s target. Family deficits and surpluses are converted to today’s date and reported separately, so one beneficiary’s surplus never conceals another’s deficit.
Percentage funded: Projected enrollment balance divided by the enrollment target. The family percentage uses combined balances and targets, so it can look fully funded while one child remains short. Read the child table before acting on it.
Required monthly savings: The total monthly contribution pace that would reach the target from the current balance under the modeled return and timing. It is not an additional amount to add on top of the contribution already entered.
Uncovered amount: A planned college-year withdrawal that the modeled account cannot fully make. The account is floored at zero rather than allowed to become negative.

Each beneficiary stays separate. Family recognized coverage is capped child by child, while total deficits and surpluses are shown independently at a common present date. The detail tables remain useful for seeing which child and academic year drives either figure.

Read the required amount as a total pace. If the result is $453 per month and the current contribution is $250 per month, the modeled increase is about $203 per month—not another $453.

Worked example

Hypothetical example. Avery is 8 and starts college at 18 for four years. Today’s annual costs are $15,000 tuition, $12,000 room and board, and $1,500 books/other. The family plans to fund 50%, assumes 5% education inflation, no scholarships, and a 6% annual investment return. Avery has $10,000 saved and receives $250 at each month end.

The four inflated academic years total about $200,091 of future gross cost.
After the 50% funding choice and allowing the remaining account to grow during college, the balance needed at enrollment is about $91,541.
The entered $10,000 balance and $250 monthly contribution grow to about $58,527 at enrollment, about 64% funded and roughly $33,015 short of the target.
The calculator solves for a total pace of about $453 per month. Relative to the entered $250 contribution, that is an increase of about $203 per month under this scenario.

Why is the enrollment target below half of $200,091? The target is measured at enrollment, while the withdrawals occur over four years. The model assumes money left after the first withdrawal continues to earn 6% until later withdrawals.

Assumptions and limitations

Each child has a separate account. The model does not automatically change beneficiaries or transfer a surplus between children; the family funding percentage recognizes no more than each child’s own target.
Contributions arrive at period end through the last period before enrollment. Planned withdrawals occur at each academic year’s start.
Costs and results are nominal future dollars. Returns, inflation, aid, and costs are steady assumptions even though real outcomes vary from year to year.
The investment return is not guaranteed and the calculator does not model market volatility or automatically reduce risk as enrollment approaches.
The calculator does not decide whether an expense is qualified. Federal tax treatment depends on current law and the actual use of each withdrawal. Room and board generally has enrollment and allowance limits.
529 contributions are not deductible for federal income tax. State benefits vary, and the optional state estimate does not determine eligibility or tax liability.
A 529 balance can affect need-based financial aid. The calculator accepts an aid assumption but does not reproduce a school or federal aid formula.
Use the school’s published cost of attendance and the 529 plan’s offering materials when refining a scenario. Transportation, personal costs, insurance, fees, and other items may need to be included in books/other.

These calculations are educational estimates, not financial, investment, legal, or tax advice. Actual results and rules may differ. Read the Financial Disclaimer.

Sources and further reading

Sources reviewed August 2026.

Investor.gov: An Introduction to 529 Plans — plan types, investment risk, fees, tax considerations, and financial-aid considerations.
IRS Publication 970, Tax Benefits for Education — current federal rules for qualified tuition programs and qualified education expenses.
Federal Student Aid: What does cost of attendance mean? — the broader school cost categories that can extend beyond the calculator’s named inputs.

The sources explain financial concepts and current rules; they do not endorse MyInvestmentCalc or validate a particular scenario.

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