Money skills for real life, before you need them.
Schools teach algebra, chemistry, and history — yet most students graduate without a single lesson on money. This site exists to change that.
Practical lessons and real calculators for the three pillars of money: you earn it, you save part of it, and you invest those savings so they grow.
Protect what you build — credit, insurance, scams & identity theft→Earn it, save it, grow it — and protect all three.
Featured lessons
Great starting points if you're new here.
The magic of compounding
At the market's historical ~10% average, $100/month from age 16 beats $300/month from age 30. The math will surprise you.
Saving moneySmart savings
Smart beats only frugal — earn cash back on spending you'd do anyway, and real interest on money you're already saving.
InvestingInvestment types
Savings, bonds, funds, stocks, crypto — how risk and reward trade off, and where beginners usually start.
Interactive tools
See all tools →Compound Interest Calculator
Watch small monthly amounts snowball over decades.
Budget Builder
Split your income into savings, needs, and wants.
Credit Card Payoff
See why minimum payments are a trap at 21% APR.
Investment Explorer
Compare savings, bonds, funds, stocks, and crypto by risk.
Money Quiz
12 scenario questions — a fresh mix every attempt.
Survey
Tell us what to teach next — about two minutes, all multiple choice.
Ask AI to Explain This
12 copy-paste prompts for ChatGPT, Claude, or Gemini — learn saving and investing more deeply, with zero private info required.
Real-life scenarios
Situations you'll actually face — and where to learn the answer.
"My paycheck says $400 but I only got $340."
That gap is tax withholding — completely normal for a W-2 job. Learn to read your pay stub.
Understand your paycheck →"Someone DM'd me offering to flip $200 into $800."
Guaranteed fast returns don't exist. This is one of the most common teen-targeted scams.
Learn the red flags →"My phone died and I have $0 saved."
A 3-month emergency stash keeps a bad week from becoming high-interest debt.
Build your stash →Think you know money?
12 scenario questions across all four pillars, with explanations for every answer. New mix each time.
Help shape this site
A two-minute survey for students, teachers, and anyone curious: what should this site teach next? Your answers guide what gets built.
About this project
Teen Money Lab exists because personal finance isn't taught enough in school, even though every student will need it in real life. Everything here is free, interactive, and written for teens — no jargon, no ads, no advice-selling.
Read moreMaking Money
Your pay goes up when your skills go up
Working more hours has a hard ceiling. Building a skill raises what you earn per hour — that's how income grows without burning out.
Hours have a ceiling
There are only so many hours in a week — and school takes most of them. If your only lever is "work more," your income maxes out fast.
Skills don't
Tutoring, video editing, design, coding help, photography — every skill you add raises your hourly rate. Skills compound like money.
Maya's story: she tutors math at $15/hr freshman year. By senior year she adds video editing and charges $35/hr. Same hours, more than double the money — because she leveled up her skills.
Skill-to-Income Calculator
What could a skill earn you?Per hour
Monthly
Yearly
In 4 years
Pay follows scarcity. If almost anyone can do a task, rates stay low — hard-to-learn skills command higher rates. Start building one this semester.
Check your understanding
Why do skilled side hustles (coding, design, tutoring) generally pay more than simple tasks?
Making Money
Where did my paycheck go? Taxes 101
Your first pay stub has two numbers that matter: what you earned, and what actually hit your account. The gap is taxes — and it's completely normal.
W-2
Arrives every January from your employer. It reports what you earned and what was withheld, so you (or a parent) can file your tax return by April 15.
FICA
Social Security (6.2%) + Medicare (1.45%) on every stub. Your employer matches it. Self-employed? You pay both halves — 15.3%.
Gross = what you earned before anything is taken out. Net (take-home) = what actually hits your account. Always budget with net — that's the money you really have.
Gross → Take-home Estimator
~15% rough teen estimateGross
Taxes (~15%)
Take-home
A rough estimate for learning — real withholding varies by state and income. If you earn little in a year, you may get much of it back as a refund after filing.
Working "under the table" for unreported cash isn't a loophole — all income is taxable, and not reporting it is tax evasion. Side-hustle income means setting aside ~25–30% for taxes.
Check your understanding
Your gross paycheck is $400. Why might take-home be only about $340?
Making Money
Side hustles that fit around school
You don't need a business plan or a loan. Most teen hustles start with a skill you already have — or can learn free online — and a few people who trust you.
Good fits for school: work that is flexible, local or remote, and doesn't require big loans or inventory. Start small, prove you can deliver, then raise your rate as your portfolio grows.
Hustle Explorer
Pick one to see how to startPick a hustle above — most need zero startup money and work around school hours.
Borrowing money for inventory and ads before you have customers is how beginners get stuck. Low-risk starts win: your skills + your network.
Check your understanding
What's usually the smartest first step for a teen side hustle?
Saving Money
Build a budget — and pay yourself first
Most people spend first and hope something is left to save. Usually there isn't. Flip it: when money arrives, move savings out before you spend on anything else.
The 50/30/20 map
~50% needs (phone bill, lunch, gas), ~30% wants (games, clothes, going out), ~20% savings. Your numbers can shift — the point is having a plan.
Goals need numbers
A goal without a number and a deadline is just a wish. "Save for a phone" becomes "Save $800 by March."
Needs vs. Wants Sorter
Click each item to cycleBudget Builder
Savings first, then split the restYou save
Needs
Wants
Saved in 1 year
Turn savings into a goal
Goal
Months to reach
Reached by
After savings comes out, the remainder is split using the classic 50:30 needs-to-wants ratio (5/8 needs, 3/8 wants).
Saving isn't leftover luck — it's a decision you make first. Every dollar needs a job, especially the ones you save.
Check your understanding
You want a $600 item in 4 months. How much do you need to save per month?
Saving Money
Your emergency stash comes first
Phone dies? Hours cut? Car needs a tire? Before investing or big purchases, save about 3 months of expenses so a bad week doesn't become high-interest debt.
Keep it in a high-yield savings account — not checking (too easy to spend) and not stocks (they can drop 30–40% right when you need cash).
Emergency Fund Calculator
Your 3–6 month target3-month target
Time to reach it
6-month target
Emergency money must be safe and available — growth can wait. Forced selling in a down market defeats the whole point of the stash.
Check your understanding
Why shouldn't your emergency fund live in a stock account?
Saving Money
Smart beats only frugal
Frugal savers cut back. Smart savers also earn cash back on spending they'd do anyway, and real interest on money they're already saving.
Cash back
Money back on spending you'd do anyway. On $10,000 a year, a 3% card returns $300 — our best example. Try the comparison below.
Interest income
A high-yield savings account can pay 4–5% while many big banks pay 0.01%. On $10,000 that's $400–500 a year instead of about $1 — for moving the money once.
Cashback Comparison
1% vs 3% on the same spendingBasic card (1%)
Smarter card (3%)
Difference
This only works if you pay the full balance every month. A 21% APR balance erases cashback fast. Cashback is a bonus for people who already don't carry a balance — not a reason to get a card early.
Go deeper with AI: copy a Saving Money prompt into your favorite AI tool — no private info needed — then come back and test yourself below.
Check your understanding
When does cashback actually help you?
Investing
What is a stock?
A stock is a tiny ownership stake in a real company. When you buy a share, you're betting that business will grow — and accepting that it might not.
Think of it like this: if a sneaker brand has 1 million shares, buying 1 share means you own one-millionth of that business. When the company profits, your slice can become worth more.
How you make money
The share price rises over time, or the company pays a dividend. It takes patience — stocks aren't lottery tickets.
The real risk
One company can crash — even to zero. In bankruptcy, stockholders are paid last and often get nothing. That's why single-company bets are risky.
Pick a Scenario
You buy $500 of one stockA stock is ownership. Any single year can drop 30–40%; over long stretches, US indexes have historically recovered. Panic-selling is what hurts most — and beginners usually start with funds that spread the risk.
Check your understanding
You invest $500 in a single stock. The company goes bankrupt. What happens?
Investing
Investment types — risk vs. reward
Bigger possible reward usually means bigger risk. There's no investment that's both totally safe and super high-return — anyone promising otherwise is selling something.
The order many educators recommend for beginners: emergency fund first → avoid high-interest debt → then low-cost index/mutual funds for long-term money. Speculative stuff (like crypto) only with money you can afford to lose entirely — if at all.
Investment Types Explorer
Click a card for pros & consQuick help: tap the ? on any card for a plain-English definition.
Risk vs. expected return (approximate)
For education only — not financial advice. Talk to a trusted adult before investing real money.
Check your understanding
What's the main advantage of a mutual/index fund over one stock?
Investing
The magic of compounding
Compound interest pays you on your money and on the interest you've already earned — over decades, that's the gap between "okay" and life-changing.
Time is #1
Starting 10 years earlier can matter more than the exact dollar amount.
Stay consistent
Small amounts added regularly beat one big lump sum you never start.
Don't break the chain
Withdrawing early resets growth. Patience is the skill.
Compound Interest & Growth Simulator
Try years = 10 vs 30You put in
Growth
Final value
Estimates for learning — not a promise of returns.
The Rule of 72
Quick mental math: divide 72 by your annual return (%) to estimate how many years money takes to double. ~7%/yr → 72 ÷ 7 ≈ 10 years. It works both ways: compounding builds wealth for investors and buries people who only pay credit card minimums (21% APR → debt doubles in ~3.4 years).
Rule of 72 — Try Your Own Rate
Years to double
$1,000 becomes
When the growth number beats the contribution number, your money is working harder than you are. Time — starting early and staying consistent — beats "perfect" timing.
Go deeper with AI: copy an Investing Money prompt into your favorite AI tool — no private info needed — then come back and test yourself below.
Check your understanding
You invest at roughly 9% per year. About how long until your money doubles?
Protecting Money
Credit scores & the debt that helps or hurts
A credit score (roughly 300–850) is your borrowing GPA. A good score means cheaper car loans and easier apartment approvals — and the clock can start at 18, not 25.
Never miss a payment
Payment history is ~35% of your score. One miss can drop you 50–100 points and stick for years.
Keep utilization low
Use under 30% of your limit. $500 limit → keep the balance under ~$150. A secured card at 18 builds history in months.
Credit Score Simulator
$15,000 car · 48-month loan (est.)Score
Rating
Car loan rate (est.)
Extra cost vs. excellent
Useful debt vs. dangerous debt
Usually OK
Student loans for strong job prospects. A low-interest car loan to get to work. Someday, a mortgage on a home that can build value. Debt tied to earning potential can make sense.
Usually trouble
Credit card balances at 20%+ APR. Buy-now-pay-later for wants. Payday loans. Debt for things already consumed just means paying more over time.
Minimum-Payment Trap
21% APR credit cardBalance
Interest paid
Total paid
Payoff time
Check your understanding
What's the biggest single factor in most credit scores?
Protecting Money
Insurance basics (before life gets expensive)
Insurance = pay a small regular amount (the premium) so a large loss doesn't wipe you out. You hope you never "use" it — and that's the point.
Auto
Required to drive in most places. Liability covers damage you cause others — one uninsured accident can mean years of debt.
Health
In the US you can often stay on a parent's plan until 26. One ER visit without coverage can cost $10,000–50,000.
Renters
Often $10–20/month. Landlord insurance covers the building — not your laptop. Your stuff is on you.
Two words to know: the deductible is what you pay first before insurance helps; the coverage limit is the max they'll pay. Lower premium usually means higher deductible — that's the trade-off.
Premium vs. Deductible Trade-off
Illustrative example numbersInsurance trades a small known cost for protection against a huge unknown one. Protecting money isn't only about scams — it's credit, insurance, identity, and smart debt working together.
Check your understanding
Your landlord has insurance on the building. Does that cover your stolen laptop?
Protecting Money
Scams, phishing & identity theft
Teens are prime targets: money-flip DMs, fake-check jobs, "your account is locked" texts. Learn the patterns once and they're easy to spot forever.
Password hygiene
Unique passwords for money apps — one reused password can unlock everything. A password manager helps.
Identity theft
Someone uses your SSN to open accounts. You can freeze your credit for free at all three bureaus.
Walk away if you see: "guaranteed" returns with zero risk · DMs offering to flip $50 into $500 · pressure to act NOW · payment by gift cards or crypto to a stranger · jobs that ask you to deposit a check and wire money back.
Spot the Scam
Scam, or looks legit?If it needs secrecy, speed, or gift cards — it's almost never real. Real banks and the IRS don't ask for passwords or gift cards over text.
Check your understanding
Someone DMs you offering to flip $200 into $800 in 48 hours. What is this?
Tools
Calculators & interactive tools
Every tool lives inside its lesson, so the numbers come with context. Jump straight to any of them here.
Compound Interest Calculator
Contributions vs. growth over up to 40 years, with a live chart.
Rule of 72
How long until money doubles at any rate — one division problem.
Budget Builder
Pay yourself first, then split needs and wants — plus a goal timeline.
Emergency Fund Calculator
Your 3–6 month target and how long it takes to get there.
Cashback Comparison
1% vs 3% on the same spending — and the trap that erases it.
Skill-to-Income Calculator
What a skill could earn per month, year, and over 4 years.
Take-home Estimator
Gross vs. net pay — see where your paycheck goes.
Credit Score Simulator
What a score means in real dollars on a $15k car loan.
Credit Card Payoff
Why minimum payments at 21% APR can take years to escape.
Investment Explorer
Savings, bonds, funds, stocks, crypto — risk vs. reward, pros & cons.
Spot the Scam
Five real-world messages — can you tell scam from legit?
Money Quiz
12 scenario questions across all four pillars.
Ask AI to Explain This
12 copy-paste prompts for your favorite AI tool — saving and investing, learning only.
AI Prompts
Ask AI to Explain This
Copy a prompt into your favorite AI tool — ChatGPT, Claude, Gemini, or another — to go deeper on saving and investing. Designed for learning, not personal financial advice.
These prompts are for learning only. Do not paste private information such as real bank balances, account numbers, passwords, Social Security numbers, or personal financial documents into any AI tool. For real financial decisions, talk with a trusted adult or qualified professional.
Saving Money
Investing Money
Try a prompt after using a calculator, then come back and test what you learned.
Quiz
Money Quiz — prove what you know
12 questions per attempt — 3 from each pillar, drawn from a bank of 36 — with an explanation for every answer. The mix reshuffles every time.
Loading quiz…
Survey
Help shape this site
About two minutes, all multiple choice, anonymous. Your answers guide which lessons and tools get built next.
Trouble seeing the form? Open it in a new tab.
Glossary
Money glossary
Plain-English definitions for every term used on this site — from W-2s and FICA to bonds, index funds, and deductibles.
About
About Teen Money Lab
A free project with one goal: make personal finance practical, approachable, and actually useful — starting from day one of your first paycheck.
Why this exists
I created Teen Money Lab because personal finance is not taught enough in school, even though every student will need it in real life. Every lesson pairs a short explanation with a tool you can actually play with, because numbers you move yourself stick better than numbers you read.
How to use it
Work through the four pillars in order — Make, Save, Invest, Protect — or jump to whatever you're curious about. Each lesson ends with a check question; get it right and the lesson is marked complete. Finish with the 12-question quiz.
For learning, not financial advice. Before making real money moves, talk to a parent, teacher, or trusted adult.