How to Plan a Family Budget That Includes Your Kids' Future
A family budget you can build in an evening, with lines for childcare, activities, allowance and the kids' savings.
Key takeaways
- Build the budget from take-home pay and split it into needs, wants and savings; the 50/30/20 rule is a common starting point you adjust.
- Give kids' costs their own lines, including a fixed monthly amount for their 529, UTMA or Trump Account.
- Automate savings for the day after payday, and compare the plan with what happened once a month.
A family budget is a plan for where each month's take-home pay goes before the month starts. With kids, it has extra lines most budgeting advice skips: childcare, activities, and the money you're setting aside for their future. Here's a way to build one in an evening and keep it going.
Step 1: Start from take-home pay
Use what lands in your bank account, after taxes, health insurance and workplace retirement contributions. If your income varies, use the average of a few lean months rather than a good one. Add every household income source.
Step 2: Split it into three buckets
The 50/30/20 rule, popularized by Elizabeth Warren and Amelia Warren Tyagi in their book All Your Worth, is a simple starting split:
- About 50% for needs: housing, utilities, groceries, insurance, transportation, childcare, minimum debt payments.
- About 30% for wants: eating out, trips, hobbies, most kids' activities.
- About 20% for savings and extra debt payments: emergency fund, retirement, and the kids' accounts.
On $6,000 a month of take-home pay, that's $3,000 for needs, $1,800 for wants and $1,200 for savings. In high-cost areas or with daycare bills, needs often run well over half. Treat the split as a starting point you adjust, and keep the savings line from shrinking to zero.
Step 3: Give the kids their own lines
Kids' costs get lost when they're scattered across other categories. Pull them into their own section:
| Line | Bucket | Notes |
|---|---|---|
| Childcare and school costs | Needs | Often the biggest line in the budget for young kids |
| Activities, camps, lessons | Wants | Budget per season so sign-up fees don't surprise you |
| Allowance | Wants | A fixed amount your kid manages themselves |
| Kids' savings and investing | Savings | A 529, UTMA or Trump Account contribution, or a kids' savings account, set as a fixed monthly amount |
If you're not sure what a kids' savings line could grow to, the kids investment calculator shows it for any monthly amount.
Step 4: Build the emergency fund first
An emergency fund is cash set aside for surprises: a job loss, a medical bill, a broken furnace. A common rule of thumb is three to six months of essential expenses, kept in a savings account you can reach quickly. Families with one income or irregular pay often aim for the higher end.
Without it, a surprise bill lands on a credit card or forces you to pull money from long-term investments. Building it a little each month counts.
Step 5: Automate the savings
Schedule transfers to savings and the kids' accounts for the day after payday, before any spending happens. This is often called paying yourself first. Money that moves automatically doesn't depend on there being something left at the end of the month.
Step 6: Check in once a month
Spend 20 minutes comparing what you planned with what happened. Move money between lines if a category keeps running over. Once a year, revisit the whole thing: raises, new childcare costs and a child aging out of daycare all change the numbers.
Bring the kids into it
Kids don't need to see your salary to learn from the budget. A young child can learn that the family chooses between things. An older kid can plan a trip budget or track their own allowance with the three-jar system. A teenager can sit in on the monthly check-in. The financial literacy guide has more by age.
Where MemoryBank fits
The kids' savings line is the one your children can watch grow. MemoryBank connects the accounts you've opened for them and shows each child their balance and savings goals, so the money you set aside every month becomes something they can see.
This article is general education, not financial advice. For decisions about debt, savings and investing, talk with a financial professional.
Frequently asked questions
How do I make a family budget?
Start with your monthly take-home pay, list your needs, wants and savings, and assign every dollar a job before the month begins. Give kids' costs their own lines, automate savings right after payday, and compare plan with reality once a month.
What is the 50/30/20 budget rule?
It's a starting split of take-home pay: about 50% for needs, 30% for wants and 20% for savings and extra debt payments. It was popularized by Elizabeth Warren and Amelia Warren Tyagi in the book All Your Worth. Families with high childcare or housing costs often adjust it.
How big should a family emergency fund be?
A common rule of thumb is three to six months of essential expenses, kept in a savings account you can reach quickly. Single-income households and those with irregular pay often aim for the higher end.
How do I include saving for my kids in the budget?
Give it its own line in the savings bucket, set a fixed monthly amount, and automate the transfer to the child's 529, UTMA or Trump Account right after payday. A small, steady amount started early can grow substantially by 18.
Should kids be involved in the family budget?
In age-appropriate ways, yes. Young kids can learn that the family makes choices, older kids can manage an allowance or plan a small budget for a trip, and teens can join a monthly check-in without seeing every number.
What to do this week
- Add up last month's take-home pay and list every recurring bill.
- Sort them into needs, wants and savings, with a separate section for the kids.
- Schedule one automatic transfer to savings for the day after your next payday.

Written by Josh Ackerman
Founder of MemoryBank. A computer scientist and M.B.A. with 20+ years of investing and technology experience, Josh built the first MemoryBank in his basement so his three kids could watch their own accounts grow. More about Josh →

See it in one place
MemoryBank shows your kid's UTMA, 529, Roth IRA, brokerage, and savings in one place — across every institution — and explains their accounts and how investing works in age-appropriate terms they actually understand. It runs in any browser and as an app on iPhone and Android.
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Kids Investment Calculator: What Could Your Child's Account Grow To?
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MemoryBank is a display and education tool, not a financial advisor. Nothing here is investment, tax, or legal advice. Verify program details with the IRS, your tax advisor, or a licensed financial professional before making decisions.