College Fund vs Retirement Calculator
Optimize the split between college savings and retirement contributions when funds are limited.
About this calculator
This calculator compares two future-value projections built from the same monthly savings annuity formula, compounded monthly at your expected return: one showing what your full monthly budget would grow to if it all went toward college (over the years until your child turns 18), and another showing what it would grow to if it all went toward retirement (over the years until your target retirement age). It then applies a built-in prioritization rule — recommending 80% of your budget go to retirement and 20% to college when you're within 15 years of retiring, or a 60/40 retirement-favoring split further out — and projects the future value each goal would reach under that recommended split. The prioritization logic reflects a common piece of financial-planning advice: retirement has no substitute funding source, while college can be financed through loans, scholarships, grants, or a gap year, so most planners recommend securing retirement first even at the cost of a smaller 529 or education account.
The 15-year threshold and the 80/20 versus 60/40 splits are the calculator's own simplified rule of thumb, not a personalized optimization — they don't account for your other retirement assets (like an employer match you'd be leaving on the table), the specific cost of the college you're targeting, financial aid formulas, or the tax advantages of a 529 plan versus a 401(k)/IRA. Treat the recommended split as a reasonable starting point for the conversation, and adjust it based on how funded your retirement already is and how much of college costs you actually intend to cover.
Financial Disclaimer
This calculator is for educational purposes only and does not constitute financial advice. Results are estimates based on the inputs provided. Consult a qualified financial advisor before making investment or financial planning decisions.
Inputs
Results
Recommended retirement/mo ($)
$300.00
How to Use This Calculator
- Enter your total monthly budget available for saving.
- Enter your child's current age and your own age.
- Set your target retirement age and expected annual investment return.
- Review the projected college fund and retirement fund values under different allocation splits.
- Note: financial advisors generally recommend prioritizing retirement — you can borrow for college but not for retirement.
How the result changes with Monthly savings budget ($)
| Monthly savings budget ($) | Recommended retirement/mo ($) |
|---|---|
| 250 | $150.00 |
| 375 | $225.00 |
| 750 | $450.00 |
| 1,250 | $750.00 |
What each input means
- Monthly savings budget ($)
- Total monthly amount available for saving.
- Child's current age
- Your child's current age.
- Your current age
- Your current age.
- Target retirement age
- Age you plan to retire.
- Expected annual return (%)
- Expected average annual investment return.
What each result means
- 100% to college ($)
- College fund value if all savings go there.
- 100% to retirement ($)
- Retirement value if all savings go there.
- Recommended college/mo ($)
- Suggested monthly college contribution.
- Recommended retirement/mo ($)
- Suggested monthly retirement contribution.
- Split college fund ($)
- Projected college fund with recommended split.
- Split retirement fund ($)
- Projected retirement with recommended split.
How this is calculated
Worked example, using the default values
- Identify Input Parameters4 parametersMonthly savings budget ($) = 500, Child's current age = 5, Your current age = 35, Target retirement age = 65 = 5 input(s) provided
- Calculate Recommended retirement/moRecommended retirement/mo300 = $300
- Calculate 100% to college100% to college = monthlyReturn > 0126665 = $126,665
- Calculate 100% to retirement100% to retirement = monthlyReturn > 0609985 = $609,985
Engine last updated . Checked against 1 independently-derived test — how we verify calculators. Built by Paul Gunder, a software engineer, not a licensed financial, medical, or legal professional.
Frequently Asked Questions
How does the calculator decide the recommended split between college and retirement?
It uses a threshold rule based on years to retirement: if you're 15 years or fewer from your target retirement age, it recommends 80% of your monthly budget to retirement and 20% to college; further out than 15 years, it recommends 60% to retirement and 40% to college. Retirement gets priority in both cases because, per the tool's built-in logic, there are more ways to fund college later than there are to fund retirement.
Why does the "100% to college" projection use my child's age but the "100% to retirement" projection use my own age?
Each projection has its own time horizon: the college figure compounds your monthly budget for the years until your child turns 18 (18 minus their current age), while the retirement figure compounds it for the years until you reach your target retirement age (retirement age minus your current age). Since those two horizons are almost always different lengths, the two 100%-scenario dollar figures aren't directly comparable to each other.
Does the recommended split account for things like an employer 401(k) match?
No — the split is a fixed heuristic based only on years-to-retirement, with no visibility into an employer match, existing retirement balances, the specific cost of the college you're targeting, or 529-versus-401(k)/IRA tax treatment. If you'd be leaving free employer-match money on the table by under-funding retirement, the real case for prioritizing it is even stronger than what the calculator shows.
What growth rate does the calculator use for both projections?
The same single annual return you enter, compounded monthly, is applied to both the college and retirement future-value calculations. The tool doesn't let you assume a more conservative return for the shorter college horizon versus a different one for the longer retirement horizon, even though many planners would use different risk profiles for each.
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