Budgeting, explained
A plan for your money before you spend it, and the simple math that shows what things really cost.
A budget is a plan for the money you expect to get: how much you'll spend, on what, and how much you'll save. Without one, money tends to disappear on small things, and there's nothing left for the things you actually care about.
Making one takes four steps:
- Write down your income: what you actually take home, not your pay before taxes.
- List your needs: things you must pay, like your phone bill, gas or bus fare.
- Decide on savings, and treat it like a bill you pay first.
- Whatever is left is for wants.
A popular starting point is the 50/30/20 rule: about 50% for needs, 30% for wants and 20% for savings. It's a guide, not a law.
Every choice has an opportunity cost: the next best thing you give up. Spending $60 on concert merch might mean not putting $60 toward a car. Neither is wrong, but a budget makes you pick on purpose.
Small monthly bills deserve extra attention. A $12 subscription doesn't feel like much, but it's $144 a year, and five of them add up to $720. Two habits help. Figure out the cost per month or cost per year of anything you pay for regularly. For things you buy once, think in cost per use: $120 sneakers worn 200 times cost 60 cents a wear, while a $40 outfit worn twice costs $20 a wear.
Check in each month. A budget isn't a punishment. It's how you make sure your money goes where you want it to.
For teachers: covers NC EPF EPF.MCM.1.1 Creating and managing a spending plan; EPF.MCM.1.2 Judging income and spending plans; EPF.FP.1.2 What shapes a financial plan: income, budget, cost of living.
In the news
Real stories from recent issues, each with class slides and a worksheet.
- Oct 27Why a Switch 2 now costs $50 more than it did in August
Money lesson: How a price hike changes your savings plan · Slides · Worksheet
- Oct 26Oil jumps and stocks slide: what it means for gas money
Money lesson: What a drive really costs · Slides · Worksheet
- Oct 23Tech stocks slid on AI spending worries, and phones cost more
Money lesson: Cost per month beats the price tag · Slides · Worksheet
- Oct 22A rocket company's strong profits lifted stocks, and shook phone carriers
Money lesson: Small monthly bills add up · Slides · Worksheet
Lesson worksheets
- Build a budget25 minutes. Use the 50/30/20 rule to plan a first paycheck, and sort needs from wants.
- The real cost: cost per month and cost per use20 minutes. How to compare prices by spreading them over time, uses or units.
Words to know
- Budget
- A plan for how you'll spend and save the money you expect to get.
- Opportunity cost
- What you give up when you choose one thing over another.
- Cost per month
- The price of something divided by the number of months you use it. It shows the real cost of a big purchase.
- Cost per use
- The price of something divided by the number of times you use it. A cheap item you rarely use can cost more per use than a pricey one you use daily.
- Unit price
- The price of one unit of something, like one can or one ounce. It lets you compare different package sizes.
- Emergency fund
- Money set aside only for surprises, like a car repair or a lost job. A common goal is three to six months of expenses, built up over time.
- Net worth
- Everything you own minus everything you owe.
- Asset
- Something you own that has value, like cash, a car, a house or stocks.
- Liability
- Something you owe, like a loan or a credit card balance.
Try it
More topics
Inflation · Interest rates and the Fed · The stock market · Investing · Paychecks and taxes · Credit cards and credit scores · Loans and debt · Banking and saving · Insurance · Scams and identity theft · The economy: jobs, GDP and recessions · Supply and demand · Tariffs and trade
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