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Lessons · The full library

67 lessons, decoded.

Every lesson answers one question, in plain English, with real numbers. Grouped by course so you can read in order, or jump to what you need. Each lesson tells you what it covers, what it doesn't, and what to read next.

67Lessons
7Core courses
3Paired calculators
10Primary sources
Showing all 67 lessons
Course
Includes
The Decoderby ClearMoneySchool

Plain-English answers from our glossary. Receipts included. Never advice.

Educational tool. Answers come only from ClearMoneySchool's published glossary and are not advice. Why we never give advice

01
The accounts and rules for building money in a child's name.

Saving for Kids.

3 lessons
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02
Start here. The foundations of how your money works.

Money Basics.

4 lessons
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03
Start here if you've never invested before.

Investing Basics.

16 lessons
View full course →
Investing Basics · Ch. 014 min

What is investing, really?

Investing is putting money to work so it can earn more money over time. Here is the plain-English version, with no jargon.

Read the lesson →
Ages 18-50U.S
Investing Basics · Ch. 025 min

Stocks explained without the jargon

A stock is a tiny piece of ownership in a real company. Here is how that ownership actually makes you money, and how it can lose money too.

Read the lesson →
Ages 18-50U.S
Investing Basics · Ch. 035 min

Bonds 101: the IOU you can buy

A bond is a loan you make to a government or company. They pay you interest, then give you your money back. Here is how that actually works.

Read the lesson →
Ages 25-65U.S
Investing Basics · Ch. 045 min

ETFs vs. mutual funds: what is actually different

Both bundle many investments into one product. The differences are in how you trade them, how much they cost, and how taxes work.

Read the lesson →
Ages 20-55U.S
Investing Basics · Ch. 054 min

Why index funds quietly won

An index fund owns the whole market, or a big slice of it, and charges almost nothing. Most professional stock-pickers cannot beat it. Here is why.

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Ages 18-55U.S
Investing Basics · Ch. 064 min

Diversification: the only free lunch

Spreading money across many investments reduces risk without reducing expected return. It is one of the few things in finance that is genuinely free.

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Ages 22-60U.S
★ Canon · Ch. 054 min

Compound growth: why early money is worth so much more

Compounding is interest earning interest on itself. Over decades, it is the single most powerful force in personal finance.

After this →You'll see the dollar cost of every year you delay.
+ Calculator
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Ages 20-50U.S
Investing Basics · Ch. 084 min

Dollar-cost averaging: the lazy way that often works

Investing the same amount every month removes the need to time the market. It also reduces regret, which matters more than people think.

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Ages 18-45U.S
Investing Basics · Ch. 095 min

Asset allocation: the one decision that matters most

Your mix between stocks, bonds, and cash explains the vast majority of your portfolio's behavior. Get this rough mix right, and the details barely matter.

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Ages 25-60U.S
Investing Basics · Ch. 104 min

Risk and reward: the trade-off you cannot escape

Higher potential return always comes with higher potential loss. Anyone who tells you otherwise is selling you something.

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Ages 18-55U.S
Investing Basics · Ch. 114 min

What is a brokerage account?

The basic financial container that holds your investments. How it works, what makes a good one, and why it's not the same as a bank account.

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Ages 18-45Securities
Investing Basics · Ch. 124 min

Dividends: when companies pay you to own them

Some companies share their profits directly with shareholders. Here's how dividends actually work and why they're not free money.

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Ages 22-60U.S · Internal
Investing Basics · Ch. 133 min

Stock splits: making expensive shares accessible

When a stock gets too expensive, companies divide each share into multiple smaller shares. Mostly cosmetic, but worth understanding.

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Ages 18-55U.S
Investing Basics · Ch. 144 min

Market orders vs. limit orders

When you buy or sell, you choose the order type. Pick the wrong one on a volatile stock and you can lose real money on the spread.

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Ages 18-50U.S
Investing Basics · Ch. 154 min

Expense ratios: the silent killer

A 1% fee sounds tiny. Compounded over 30 years, it can eat one-third of your final balance. Here's why fees matter so much.

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Ages 22-60U.S
★ Canon · Ch. 165 min

The expense ratio: the silent fee that destroys returns

Every mutual fund and ETF charges a fee called the expense ratio. Most investors never see it leave their account, because it doesn't. The fee is taken silently from the fund's assets before the return ever reaches your statement.

After this →You'll spot the $87K fee hiding in your 401(k) tonight.
+ Calculator
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Ages 22-55U.S · S&P
The Real Cost · Investing Basics

A 0.75% expense ratio on a $300k portfolio is $87,000 over 30 years.

$87K
Read the math →
04
Make your cash work harder.

Banking & Savings.

8 lessons
View full course →
Banking & Savings · Ch. 014 min

Checking vs. savings: the right setup

Most people use these wrong. Here's the simple structure that maximizes your interest while keeping your daily money easy to access.

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Ages 16-60Consumer · Federal
Banking & Savings · Ch. 023 min

How a high-yield savings account pays you more

Why most checking accounts pay almost nothing, and how a high-yield savings account at the right place can pay you 20× to 100× more.

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Ages 18-65Federal
Banking & Savings · Ch. 034 min

Money market account or fund: which is which

Same name, very different products. One is a bank account, one is an investment. Here's how to tell them apart.

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Ages 25-65U.S · Federal
Banking & Savings · Ch. 044 min

Certificates of deposit (CDs): the predictable cousin

A CD is a savings account where you agree to lock the money up for a set time in exchange for a guaranteed rate. Useful in some situations, ignored in others.

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Ages 25-70U.S · Federal
Banking & Savings · Ch. 054 min

How Treasury bills work, and what they pay

Short-term loans to the U.S. government, considered the safest dollar investment in the world. How they work and where to buy them.

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Ages 30-70U.S
Banking & Savings · Ch. 065 min

How I-Bonds protect your savings from inflation

A government savings bond whose interest rate adjusts with inflation. Useful for medium-term savings, with some annoying restrictions.

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Ages 25-65U.S
Banking & Savings · Ch. 074 min

Credit unions vs. banks: what's the difference?

Credit unions are nonprofits owned by their members. They often pay better rates and charge lower fees. Here's the trade-off.

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Ages 18-65National · Federal
Banking & Savings · Ch. 084 min

How banks actually make money

Understanding the bank business model helps you understand why your savings rate is what it is, and why banks fight so hard for your checking account.

Read the lesson →
Ages 18-60Federal
05
Use the tax code in your favor.

Retirement.

8 lessons
View full course →
Retirement · Ch. 015 min

401(k) basics: the workplace retirement account

An employer-sponsored retirement account with tax benefits and, often, free money from your company. The mechanics, in plain English.

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Ages 22-60Internal
Retirement · Ch. 025 min

Roth IRA vs. Traditional IRA

Two retirement accounts you open yourself, with the same contribution limits but very different tax treatment. The choice depends on your tax rate now versus later.

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Ages 22-55Internal
Retirement · Ch. 035 min

Roth vs. Traditional, decided in 60 seconds

The Roth vs. Traditional question is asked thousands of times a day on the internet, and answered badly almost every time. The honest answer is shorter than the question, and the framework that produces it fits on a napkin.

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Ages 22-55Internal
Retirement · Ch. 048 min

How HSAs Actually Work

An HSA is the only account in the tax code that gives you three separate tax breaks at once. If you have a high-deductible health plan and you're not using one, you're paying taxes you don't have to pay.

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All agesInternal
Retirement · Ch. 055 min

Social Security: the basics every worker should know

How the program works, when you can claim, and why claiming early is one of the most expensive financial decisions Americans regularly make.

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Ages 30-67Social
Retirement · Ch. 065 min

What to do with your 401(k) when you leave a job

Four options, very different consequences. Most people pick wrong by default and pay for it for decades.

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Ages 22-60Internal
Retirement · Ch. 075 min

Backdoor Roth IRA: when you earn too much

Roth IRAs phase out for high earners. The 'backdoor' is a perfectly legal workaround that high-income earners use every year.

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Ages 30-55Internal
Retirement · Ch. 085 min

Mega backdoor Roth: the high earner's secret weapon

If your 401(k) plan supports it, you can put potentially $40,000+ extra into a Roth account every year. Most people don't know this exists.

Read the lesson →
Ages 30-55Internal
06
The rules every investor should know.

Taxes Made Simple.

6 lessons
View full course →
★ Canon · Ch. 015 min

What 'marginal tax rate' actually means

The most common tax misconception in America: 'I don't want a raise. It'll push me into a higher tax bracket and I'll take home less.' This is wrong. Understanding why is the first step to reading a paycheck like an adult.

After this →You'll never again refuse a raise because of "the bracket."
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Ages 22-55Internal
Taxes Made Simple · Ch. 024 min

Marginal vs. effective tax rate

The difference everyone confuses. Knowing this is the difference between making smart tax decisions and making panicked ones.

Read the lesson →
Ages 18-65Internal
Taxes Made Simple · Ch. 035 min

Capital gains: short-term vs. long-term

Selling an investment for more than you paid creates a capital gain. How long you held it determines how heavily it is taxed, sometimes by a huge margin.

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Ages 25-65Internal
Taxes Made Simple · Ch. 044 min

Which tax-advantaged account to fund first

Different account types in the U.S. get different tax treatment. Knowing the menu is half the battle in personal finance.

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Ages 22-55Internal
Taxes Made Simple · Ch. 056 min

Tax-loss harvesting in detail

Beyond the basics: when it's worth doing, how to avoid the wash-sale trap, and why it works best in years you don't expect.

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Ages 30-65Internal
Taxes Made Simple · Ch. 064 min

Quarterly estimated taxes for self-employed people

If you have freelance income, side gig revenue, or investment gains, you may need to pay taxes four times a year, not once. Here's the basic structure.

Read the lesson →
Ages 22-65Internal
07
The non-investing money decisions that matter most.

Credit, Debt & Life Essentials.

4 lessons
View full course →
★ Canon · Ch. 025 min

How interest on a credit card actually compounds

The reason credit card debt is uniquely dangerous is not the interest rate. Auto loans can be high-rate too. The reason is how the interest is calculated, every day, on a balance that almost no one fully understands.

After this →You'll see what minimum payments cost you, in dollars.
Read the lesson →
Ages 18-45Board · Consumer · U.S
Credit, Debt & Life Essentials · Ch. 036 min

Mortgages 101: what you're actually signing up for

A mortgage is the largest financial commitment most people make. Here's how the loan actually works, what the payment really covers, and what to compare.

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Ages 25-55Consumer · Federal · Freddie
★ Canon · Ch. 048 min

FHA vs Conventional: the real 30-year cost

Two people buy the same $400,000 house. One uses an FHA loan, one uses a conventional loan. Same price, same rate, same week. One of them can pay tens of thousands of dollars more over the life of the loan, and most of that extra money goes to insurance that protects the bank, not them. Here is the actual math.

After this →You'll know the real 30-year cost gap between the two loans, about $46,000, and when each one wins.
+ Calculator
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Ages 25-45HUD · Consumer · U.S
★ Canon · Ch. 056 min

Buying vs. renting: the actual math

'Renting is throwing money away' is the most expensive piece of financial folk wisdom in circulation. The truth is more boring, and more useful: buying and renting are two different bundles of cash flows, and at any given time, in any given market, one of them is cheaper than the other.

After this →You'll see the real 30-year math, not the cocktail-party version.
Read the lesson →
Ages 25-45Federal · Insurance · U.S
08
The patterns that quietly drain most beginners.

Behavior & Psychology.

7 lessons
View full course →
Behavior & Psychology · Ch. 015 min

The most common mistakes beginners make

Most early losses do not come from stock picks. They come from a small set of behavioral mistakes everyone makes, repeated for years.

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Ages 18-45
Behavior & Psychology · Ch. 026 min

What an emergency fund actually does for your brain

Most personal finance content explains the emergency fund as a financial buffer. That is correct, and it is the smaller half of the story. The larger half is what the emergency fund does to your decision-making before any emergency happens.

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Ages 22-60Board · Mani · Federal
Behavior & Psychology · Ch. 034 min

Lifestyle creep: the silent wealth killer

Why people who get raises don't always get richer. The pattern most professionals fall into without noticing.

Read the lesson →
Ages 22-50U.S · Federal
★ Canon · Ch. 045 min

Lifestyle inflation: why a raise doesn't feel like a raise

Most workers, over most of a career, get raises. Most workers, over most of a career, do not feel meaningfully richer than they did at 25. Both of these things are true, and there is a name for the gap between them.

After this →You'll have a rule for every future raise that costs nothing to follow.
+ Game inside
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Ages 25-45U.S · Diener · Board
Behavior & Psychology · Ch. 065 min

Paying off credit card debt: the best return you can get

Paying off a 22% APR credit card is mathematically equivalent to earning a guaranteed 22% return. Nothing else in finance comes close.

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Ages 18-60Consumer · Federal
Behavior & Psychology · Ch. 076 min

Insurance basics: which policies you actually need

Insurance protects against catastrophic loss. Most people are over-insured in some areas and dangerously under-insured in others. Here's the framework.

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Ages 22-65National · Consumer
Behavior & Psychology · Ch. 086 min

Estate planning basics: what every adult should have

Estate planning isn't just for the wealthy or the elderly. Five basic documents protect you and the people you care about, and most can be done cheaply.

Read the lesson →
Ages 40-75Internal
The Real Cost · Behavior

One absorbed raise, redirected and compounded, is $200,000 by retirement.

$200K
Read the math →
09
Beyond the basic stock-and-bond portfolio.

Alternatives & Real Estate.

7 lessons
View full course →
Alternatives & Real Estate · Ch. 015 min

REITs: real estate without the tenant calls

A REIT lets you own a slice of professionally managed real estate the way you'd own a stock. Apartments, hospitals, data centers, warehouses.

Read the lesson →
Ages 25-60U.S
Alternatives & Real Estate · Ch. 025 min

What commodities are, and who should own them

Raw materials that fuel the economy. Why some investors hold them and what to know before adding them to a portfolio.

Read the lesson →
Ages 25-60U.S · Commodity
Alternatives & Real Estate · Ch. 035 min

Crypto: what it actually is

A neutral, plain-English explanation of cryptocurrency: what it is, what makes it different, and what to think about before owning any.

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Ages 18-45U.S
Alternatives & Real Estate · Ch. 045 min

Hedge funds: what they actually are

Glamorous, mysterious, and mostly inaccessible. Here's what hedge funds actually do, and why their average performance might surprise you.

Read the lesson →
Ages 25-60U.S
Alternatives & Real Estate · Ch. 056 min

Private investments: what is behind the curtain

Private equity, private credit, venture capital, hedge funds. What they actually are, why everyone wants in, and why most people probably should not chase them.

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Ages 30-60U.S
Alternatives & Real Estate · Ch. 065 min

Annuities: what they are and why most people don't need them

Insurance products that pay a stream of income. Sometimes useful, often oversold by commission-driven salespeople. Here's how to tell the difference.

Read the lesson →
Ages 45-70U.S
Alternatives & Real Estate · Ch. 074 min

Art, wine, watches: alternative assets explained

These markets exist, and some have real returns. They're also illiquid, opaque, and full of people trying to take advantage of you.

Read the lesson →
Ages 30-65Internal · U.S
+

More lessons.

4 lessons
Lesson8 min

Trump Accounts, explained

A Trump Account is a new kind of traditional IRA opened for a child: a low-cost U.S. stock index fund, seeded with a one-time $1,000 federal deposit for eligible kids, that grows untaxed and is generally locked until 18. Here is how it works, what the big projected numbers are really worth after inflation and tax, and how it compares with a 529 and a UTMA.

Read the lesson →
Ages 18-45U.S · Internal · Federal
Lesson6 min

What the yield curve is, and why it signals recessions

The yield curve is the gap between what short-term and long-term Treasurys pay. When short-term pays more than long-term, the curve has inverted, and that flip has shown up before recent U.S. recessions. Here is what it measures, and what it does not.

Read the lesson →
Ages 25-55FRED · NBER · FEDS Notes
Lesson7 min

How the Federal Reserve works, and how it sets interest rates

The Federal Reserve is the U.S. central bank. It has two jobs, stable prices and maximum employment, and its main lever is one short-term interest rate that ripples out to your mortgage, your savings, and your credit cards. Here is what it actually does, and what it does not.

Read the lesson →
Ages 22-70Board · FRED
Lesson7 min

How to read the monthly jobs report

The monthly jobs report drives markets and shapes what the Federal Reserve does with interest rates. It really comes down to two headline numbers plus a few that fill in what they miss. Here is how to read it, and what it does not tell you.

Read the lesson →
Ages 22-70Bureau