If you've got a young kid and you're already thinking about college costs, you're ahead of most parents — and the math rewards early starters more than almost any other part of financial planning. Plug your child's age, expected college start age, current tuition cost, and a couple of assumptions into the calculator above, and you'll get two numbers: a total savings target and a monthly amount to hit it.

Those numbers are only as good as the assumptions behind them. Below, we'll walk through what college actually costs going into the 2025-26 school year, what's changed with 529 plans for 2026, and how to turn the calculator's output into something you can actually act on.

What College Actually Costs Right Now (2025-26)

The calculator's cost dropdown gives you rough categories, but it's worth checking those against current data before you lock in a number. The College Board tracks this every year, and the 2025-26 averages look like this:

*Total cost of attendance includes tuition, fees, room, board, books, and typical personal expenses.

Two things stand out here. First, the gap between "tuition" and "what you actually pay" is huge — a public in-state student's total cost is nearly triple the tuition line alone once housing and food are added. Second, prices are still climbing faster than general inflation: public four-year tuition rose almost 3% this year, and private tuition rose closer to 4%.

If the number you plug into the calculator is just tuition, your savings target will be too low. Use the "Custom Amount" option and enter the full cost of attendance for the type of school you're realistically planning for — or better, look up the specific school's published cost if you already have one in mind.

How This College Savings Calculator Works

The math behind the tool is straightforward, and understanding it helps you trust the output instead of just staring at a big number.

• Education inflation rate: the default of 6% is intentionally on the higher end. Actual college cost increases have run closer to 3-4% annually over the past decade, but building in a cushion protects you from underestimating. If you'd rather model a more moderate scenario, drop it to 4% and compare.
• Investment return rate: the 7% default reflects a long-term, diversified portfolio — roughly what a 529 plan invested in an age-based or growth-oriented fund might average over 10+ years. This isn't guaranteed; markets don't move in a straight line, and your actual returns will bounce around that average year to year.
• Future value calculation: the calculator compounds today's cost forward by the inflation rate for every year until your child starts college, then adds three more years of increases to cover a typical four-year degree.
• Monthly savings needed: this uses a standard future-value-of-annuity formula, working backward from your target to figure out what a consistent monthly contribution needs to be, assuming it grows at your chosen return rate the whole way.

The "amount needed to save" already subtracts the projected future value of whatever you've put aside so far — so if you've got $5,000 saved today, the tool isn't ignoring it; it's crediting you for the growth that money will see before your child enrolls.

New 529 Plan Rules for 2026 You Should Know

2026 brings some of the biggest changes to 529 plans in years, mostly from the One Big Beautiful Bill Act (OBBBA), signed in July 2025. If you're using a 529 as your savings vehicle, these matter.

The K-12 withdrawal limit doubles

Starting January 1, 2026, families can withdraw up to $20,000 per student per year tax-free for K-12 expenses, up from the previous $10,000 cap. If you're paying private school tuition or covering other qualifying K-12 costs before college even starts, this roughly doubles how much of that spending your 529 can absorb.

More expenses now qualify

Since July 2025, the definition of "qualified K-12 expense" expanded well beyond tuition. Tutoring (from a non-relative, licensed teacher, or subject-matter expert), standardized test fees, AP and college admission exam costs, homeschool curriculum, and even certain postsecondary credentialing programs can now be paid from a 529 without triggering tax or penalty.

One catch worth flagging: not every state follows the federal rules. A handful of states, including California and New York, don't conform to the expanded K-12 and homeschool provisions — meaning a withdrawal that's federally tax-free could still trigger state tax or claw back a prior state deduction. Check your specific state's 529 plan rules before relying on this.

529-to-Roth IRA rollovers

If your child ends up with unused 529 funds, you're not stuck. Under SECURE 2.0, up to $35,000 can be rolled over — over the beneficiary's lifetime — into a Roth IRA in their name, provided the 529 account has been open at least 15 years and the specific funds being moved have sat in the account for at least 5 years. The beneficiary also needs earned income at least equal to the rollover amount for that year, and the rollover still counts against their annual Roth contribution limit.

Gift tax exclusion and superfunding for 2026

Contributions to a 529 count as gifts for tax purposes, but the annual exclusion is generous. For 2026, you can contribute up to $19,000 per beneficiary ($38,000 for a married couple) without any gift tax filing. There's also a "superfunding" option that lets you front-load five years of contributions at once — up to $95,000 individually or $190,000 for a married couple — as long as you don't make additional gifts to that same beneficiary during the following five years. None of this is an annual contribution cap; it's purely about when you need to file IRS Form 709.

If you've already decided a 529 plan is your savings vehicle, our 529 calculator breaks down state-by-state contribution limits and tax deductions in more detail — this page is more useful for figuring out your overall target number first.

When Should You Actually Start Saving?

Earlier is better, and not by a small margin. Many parents don't start seriously saving until their child is already enrolled in early childhood education programs or heading into kindergarten — often five or six years after the ideal starting point of birth.

Here's why that gap matters: at a 7% return, money saved when your child is a newborn has 18 years to compound. Money you start saving when they're 10 only has 8 years. To hit the same total, the person starting at age 10 has to save more than double per month compared to someone who started at birth — not because they're saving less overall, but because they're giving the money far less time to grow on its own.

That doesn't mean it's too late if your child is already 8 or 12. It means the monthly number will be higher, and it's worth running a few scenarios through the calculator with different start points to see the real cost of waiting versus the cost of starting now, even small.

529 Plan vs. Other Ways to Save for College

A 529 isn't the only option, and it's not always the right one for every family.

For most families targeting college specifically, the 529's tax-free growth outweighs its restrictions — especially now that unused funds have a real exit ramp through the Roth rollover and expanded K-12/credentialing uses. A Coverdell ESA can work as a supplement if you want more control over investment choices, but the $2,000 annual cap limits how much heavy lifting it can do on its own.

Mistakes That Throw Off College Savings Plans

• Using today's price instead of the future price. Plugging in what tuition costs right now, rather than what it will cost when your child enrolls, is the single most common way people under-save.
• Forgetting that costs keep rising during college. Year four of a degree costs more than year one. The calculator accounts for this, but many back-of-envelope estimates don't.
• Treating "they might not go to college" as a reason not to save. Between changing beneficiaries, the Roth rollover option, and the expanded list of qualifying credentialing programs, unused 529 money has far more useful destinations than it used to.
• Ignoring financial aid entirely — or over-relying on it. Aid can meaningfully lower your real cost, but assuming it will cover a large gap without evidence (like a school's published net price) is a risky bet to build a whole plan around.

Turning the Calculator's Output Into an Actual Plan

Once you have your monthly number, the next step is making it automatic. Set up a recurring transfer into your 529 or savings vehicle rather than relying on manual contributions — consistency matters more than timing the market. If grandparents or other relatives want to help, the superfunding rules above let them make a meaningful one-time contribution instead of small annual gifts. And revisit the numbers once a year: tuition inflation, your investment returns, and your own financial situation will all shift, and a plan built when your child was 3 should get a checkup by the time they're 8.

Frequently Asked Questions

Is there a maximum amount I can contribute to a 529 plan in 2026?

No federal annual cap exists. The number that matters is the gift tax exclusion — $19,000 per person, per beneficiary ($38,000 for married couples) in 2026 — above which you'd need to file a gift tax return, though you likely still wouldn't owe tax unless you exceed the much larger lifetime exemption.

Can I use 529 funds for private K-12 school in 2026?

Yes, up to $20,000 per student per year starting in 2026, up from $10,000 previously. The expanded list of qualifying expenses (tutoring, homeschool materials, test fees) applies to withdrawals made since July 2025, but check whether your state conforms to these federal changes before assuming the withdrawal is also state-tax-free.

What happens to 529 money if my child doesn't go to college?

You have several options: change the beneficiary to another family member, use the funds for K-12 costs or credentialing programs, or roll up to $35,000 over the child's lifetime into a Roth IRA in their name, provided the account meets the 15-year and 5-year holding requirements.

Can 529 funds really be rolled into a Roth IRA?

Yes, under SECURE 2.0. The account must be at least 15 years old, the specific funds being moved must have been in the account at least 5 years, and the beneficiary needs earned income for the year at least equal to the rollover amount. It also counts toward their annual Roth contribution limit.

How much should I be saving per month for my child's college fund?

It depends heavily on your child's age, the type of school you're targeting, and your assumed investment return — which is exactly what the calculator above is built to estimate. As a rough anchor, a family starting at birth and targeting an in-state public school might land somewhere in the low hundreds per month, while starting later or targeting a private school can push that figure considerably higher.

Is a 529 plan better than a regular savings account for college?

For most families, yes — the tax-free growth on qualified withdrawals is hard to match with a taxable account, and the 2026 rule changes have made unused funds far less "stuck" than they used to be. A high-yield savings account still makes sense for short-term costs or as a buffer alongside a 529, just not as the primary long-term vehicle.