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Money glossary

Money terms, explained in plain English

The 52 terms that come up most in our guides, each explained the way you would explain it to a friend, with a worked example and where to read more. Terms in our articles link here the first time they appear.

0–9

401(k)

A retirement account offered through a US employer, where money is taken from your paycheck and invested before you ever see it.

Contributions come straight out of your pay, which makes saving automatic. A Traditional 401(k) lowers your taxable income now and is taxed when you withdraw in retirement; a Roth 401(k) is taxed now and grows tax-free. Many employers add an employer match on top.

For 2026 you can contribute up to $24,500 of your own money. Taking money out before age 59½ usually means a 10% penalty plus income tax, so treat it as long-term money.

Example Earn $50,000 and contribute 6%, and $3,000 a year goes into your 401(k), about $115 per biweekly paycheck. With a 50% match on that 6%, your employer adds another $1,500.

Go deeper: Roth or Traditional 401(k)? The Tax-Bracket Question That Settles It · Save, Invest, or Pay Off Debt First? The Financial Order of Operations

4% rule

A rule of thumb that you can withdraw about 4% of your investments in your first year of retirement, then the same amount adjusted for inflation each year, with a good chance the money lasts 30 years.

It comes from studies of historical US stock and bond returns. Flip it around and you get a savings target: 25 times your yearly spending. The safe rate shifts with market conditions; Morningstar put it at 3.9% for people retiring in 2026.

It is a planning shortcut, not a guarantee. A bad market early in retirement (sequence of returns risk) matters more than the average return.

Example To spend $40,000 a year from investments, you would aim for about $1,000,000 (25 × $40,000). In year one you withdraw $40,000 (4%); if inflation is 3%, year two is $41,200.

Go deeper: How Much Do You Actually Need to Retire? The 4% Rule, Explained Without the Maths Anxiety · The Quiet Retirement Risk Most Investors Ignore (Until It's Too Late)

A

Appreciation

An increase in the value of something you own, such as a home or a share, over time.

Appreciation is a gain on paper until you sell. For property investors it is the second source of return next to rental income; relying on it alone is riskier, because prices can fall as well as rise.

Example Buy a home for $300,000, and if it is worth $330,000 five years later, it has appreciated by $30,000, or 10%.

Go deeper: Looking to Build Wealth? Discover 10 Tips for Profitable Long-Term Real Estate Investing · Real Estate Investing Guide for Beginners: How To Get into Real Estate Investing?

APR

The annual percentage rate: the yearly cost of borrowing, including interest and some fees.

Credit cards, car loans and mortgages all quote an APR. Credit card interest is usually charged monthly, so the true yearly cost of a balance you carry is a little higher than the APR. Its savings-account cousin is APY, which includes compounding.

Card APRs are high, often above 20%, which is why paying a card off in full each month matters more than almost any investing decision.

Example Carry a $2,000 balance on a card at 22% APR and you pay about $37 a month in interest ($2,000 × 22% ÷ 12) without shrinking the balance at all.

Go deeper: 6 Credit Card Strategies You Need to Know to Optimize Your Finances · Want to Get Out of Debt Fast? Use These 7 Proven Strategies to Regain Financial Freedom · Credit Card Debt Calculator

Asset allocation

How your investments are split between types of asset, mainly stocks, bonds and cash.

Your allocation drives most of how your portfolio behaves: more stocks means more growth over long periods and bigger swings along the way; more bonds and cash means a smoother ride and lower expected returns. The right mix depends on your time horizon and risk tolerance.

A classic rule of thumb was "100 minus your age" in stocks; longer lives mean many guides now suggest more.

Example A portfolio with $8,000 in a stock index fund and $2,000 in a bond fund has an 80/20 allocation.

Go deeper: How Much of Your Portfolio Should Be in Stocks at Your Age? (And Why '100 Minus Your Age' Is Outdated) · 8 Rules Every Investor Needs to Build a Diversified Portfolio and Achieve Financial Freedom

B

Bond

A loan you make to a government or company, which pays you interest and returns your money on a set date.

Bonds usually swing less than stocks, which is why they are used to steady a portfolio. Their prices move opposite to interest rates: when rates rise, existing bonds with lower payments become less valuable.

Example Buy a 10-year $1,000 bond paying 5% and you receive $50 a year for 10 years, then your $1,000 back at the end.

Go deeper: Why should you include bonds in your portfolio? Here’s How They Provide Diversification and Enhance Returns in Uncertain · 6 Types of Bonds Every Investor Should Understand to Build A Well-Diversified Portfolio that Outperforms The Market

Budget

A plan for where your money goes each month, set before you spend it.

A budget is less about cutting back than about deciding. A popular starting point is 50/30/20: about half of take-home pay for needs, 30% for wants and 20% for saving and paying down debt.

Example On $3,000 of take-home pay, 50/30/20 means about $1,500 for rent, bills and groceries, $900 for everything else, and $600 for savings and extra debt payments.

Go deeper: Looking to Take Charge of Your Finances? Follow These 10 Steps to Create a Personal Budget That Works · Living Paycheck to Paycheck? Follow This Proven 8-Steps System to Take Control of Your Finances

C

Capital gains

The profit you make when you sell an investment for more than you paid for it.

In the US, gains on investments held for more than a year (long-term) are taxed at lower rates, currently 0%, 15% or 20% depending on income, than gains on investments held for a year or less (short-term), which are taxed like wages. Gains inside a 401(k) or IRA are not taxed each year.

Example Buy shares for $1,000 and sell them two years later for $1,500 and you have a $500 long-term capital gain. At a 15% rate, the tax is $75.

Go deeper: The Complete Guide to Tax-Efficient Investing: 6 Proven Steps for Smarter Wealth Growth

Cash flow

The money coming in minus the money going out over a period, usually a month.

For your own finances, positive cash flow means you spend less than you earn and have something left to save. For a rental property, it is the rent left after the mortgage, repairs, insurance and other costs.

Example A rental bringing in $1,800 a month with $1,550 of mortgage and running costs has $250 of monthly cash flow.

Go deeper: What Is Cash-on-Cash Return? The Golden Metric You Must Know Before Investing In Real Estate · Looking to Build Wealth? Discover 10 Tips for Profitable Long-Term Real Estate Investing

Cash-on-cash return

A property’s yearly cash flow divided by the cash you actually put in.

It shows what your own money is earning, which matters when a loan covers most of the purchase. It ignores appreciation and the loan being paid down, so it is one measure among several.

Example Put $50,000 of your own cash into a rental that produces $4,000 of cash flow a year and the cash-on-cash return is 8% ($4,000 ÷ $50,000).

Go deeper: What Is Cash-on-Cash Return? The Golden Metric You Must Know Before Investing In Real Estate

Compound interest

Earning interest or returns on your earlier interest and returns, not just on the money you put in.

Growth builds on growth, so time does most of the work. That is why starting early matters so much more than starting big, and why high-interest debt, which compounds against you, is so costly.

Example $1,000 growing at 7% a year becomes about $1,967 after 10 years and about $7,612 after 30. The last 20 years add far more than the first 10.

Go deeper: How Financial Literacy Quietly Closes the Wealth Gap (And Why Compound Interest Is the Real Equalizer) · How to Start Investing With $100 a Month (Without Picking Stocks or Paying Fees) · Compound Interest Calculator

Credit score

A three-digit number that tells lenders how likely you are to repay what you borrow.

The most used, FICO, runs from 300 to 850. It is built mainly from your payment history (35%) and how much of your available credit you use (30%), followed by the length of your history, new applications and your mix of credit.

A higher score gets you lower interest rates, which on a mortgage can be worth tens of thousands of dollars over its life.

Go deeper: What's a Good Credit Score, Really? The Three Numbers That Actually Change Your Life · The Ultimate Guide to Master Your Credit Score

Credit utilization

The share of your available credit card limits that you are using.

It is the second-biggest factor in your credit score. Keeping it under 30% helps, and people with the highest scores tend to stay under 10%. Paying your balance before the statement date lowers the figure that gets reported.

Example A $1,500 balance on cards with a combined $5,000 limit is 30% utilization.

Go deeper: 6 Credit Card Strategies You Need to Know to Optimize Your Finances · What's a Good Credit Score, Really? The Three Numbers That Actually Change Your Life

D

Diversification

Spreading your money across many investments so that no single one can sink you.

Individual companies can fail, but a fund holding hundreds of them rarely suffers the same fate all at once. Diversifying across countries and asset types (stocks, bonds, property) smooths things further. It lowers risk without giving up much return, which is why it is often called the only free lunch in investing.

Example Put everything in one company and a 50% drop in its share price halves your money. Spread the same amount over a 500-company index fund and that one company’s drop barely registers.

Go deeper: 8 Rules Every Investor Needs to Build a Diversified Portfolio and Achieve Financial Freedom · Should Your Index Fund Include the Whole World, or Just America? Here's the Honest Trade-off

Dividend

A share of a company’s profits paid out to its shareholders, usually every quarter.

Not every company pays one. Reinvesting dividends, using them to buy more shares, is one of the quiet engines of long-term returns. Dividend yield is the yearly dividend divided by the share price.

Example Own 100 shares of a company paying $0.50 per share each quarter and you receive $50 a quarter, $200 a year.

Go deeper: How to value a stock using the Dividend Discount Model (DDM)? · What is Passive Investing? · Dividend Calculator

Dollar-cost averaging

Investing the same amount on a regular schedule, whatever the market is doing.

You automatically buy more shares when prices are low and fewer when they are high, and you never have to decide whether today is a good day to invest. It is how most people invest anyway, through every paycheck.

Example Invest $100 in a month when a fund costs $10 (10 shares) and $100 when it costs $5 (20 shares). You own 30 shares for $200, an average of $6.67 each, below the $7.50 average price.

Go deeper: How to Start Investing With $100 a Month (Without Picking Stocks or Paying Fees) · What a Vanguard Index Fund and Doing Absolutely Nothing Have In Common (And Why It's Made Lazy Investors Rich)

Down payment

The part of a home’s price you pay upfront in cash, with a mortgage covering the rest.

A bigger down payment means a smaller loan, lower monthly payments and less interest. In the US, putting down less than 20% usually means paying private mortgage insurance (PMI) until you reach 20% equity.

Example A 20% down payment on a $300,000 home is $60,000, leaving a $240,000 mortgage.

Go deeper: Ready to Buy Your First Home? Here Are 10 Key Factors Every New Homebuyer Must Consider to Ensure a Smart Purchase · Renting vs. Buying: What’s Best for Young Adults in Today’s Market? · Mortgage Calculator

E

Emergency fund

Cash set aside for unexpected costs such as a job loss, car repair or medical bill.

The usual target is three to six months of essential expenses, kept somewhere safe and easy to reach, like a high-yield savings account, not invested in stocks. It stops a surprise bill from turning into credit card debt.

Example If rent, bills, food and transport cost $2,000 a month, a three-to-six-month emergency fund is $6,000 to $12,000.

Go deeper: Your Ultimate Step-by-Step Guide to Building an Emergency Fund — Even on a Tight Budget · Building Your Safety Net: A Young Adult's Guide to Emergency Funds

Employer match

Money your employer adds to your retirement account when you contribute to it yourself.

A common formula is 50% of what you put in, up to 6% of your salary. It is an instant return on your money that nothing else guarantees, which is why capturing the full match usually comes first in any savings plan.

Example On a $50,000 salary with a 50% match up to 6%, contributing $3,000 (6%) gets you an extra $1,500 from your employer. Contribute only 3% and you leave $750 a year on the table.

Go deeper: Save, Invest, or Pay Off Debt First? The Financial Order of Operations · Roth or Traditional 401(k)? The Tax-Bracket Question That Settles It

Equity

Ownership: in investing, shares of companies (stocks are also called equities); in property, the part of a home you own outright.

Home equity is the home’s value minus what you still owe on it. It grows as you pay down the mortgage and as the home appreciates.

Example A home worth $300,000 with $200,000 left on the mortgage gives you $100,000 of equity.

Go deeper: Renting vs. Buying: What’s Best for Young Adults in Today’s Market? · Looking to Build Wealth? Discover 10 Tips for Profitable Long-Term Real Estate Investing

Expense ratio

The yearly fee a fund charges, shown as a percentage of the money you have in it.

It is taken out of the fund automatically, so you never see a bill, which makes it easy to ignore. Broad index funds often charge 0.03% to 0.10%; many actively managed funds charge 0.5% to 1% or more. Over decades the difference is large.

Example $10,000 growing at 7% a year for 30 years becomes about $75,500 in a fund charging 0.03%, but about $57,400 in one charging 1%, roughly $18,000 lost to fees.

Go deeper: Index Funds: Boring But Brilliant? Discover Why They're the Unsung Heroes of the Investment World · Aiming to Grow Your Savings? Here are 14 Best Low-Cost Index Funds to Invest in for Long-Term Growth · Expense Ratio Calculator

F

Financial independence

Having enough invested that the returns can cover your living costs, so working becomes optional.

A common target is 25 times your yearly spending, based on the 4% rule. How fast you get there depends far more on your savings rate than on your salary.

Example Spending $40,000 a year means a target of about $1,000,000.

Go deeper: How Much Do You Actually Need to Retire? The 4% Rule, Explained Without the Maths Anxiety · How Financial Literacy Quietly Closes the Wealth Gap (And Why Compound Interest Is the Real Equalizer)

H

High-yield savings account

A savings account, often from an online bank, that pays several times the interest of a typical bank savings account.

It is a good home for an emergency fund: your money stays safe and easy to reach while still earning something. In the US, check the bank is FDIC-insured, which protects up to $250,000 per depositor per bank. Rates move with interest rates generally, so compare the APY.

Go deeper: Your Ultimate Step-by-Step Guide to Building an Emergency Fund — Even on a Tight Budget · Building Your Safety Net: A Young Adult's Guide to Emergency Funds

I

Index fund

A fund that simply holds every company in a market index, such as the S&P 500, instead of trying to pick winners.

Because nobody is paid to choose stocks, fees are very low, and over long periods index funds beat most professionally managed funds. One index fund can give you instant diversification across hundreds or thousands of companies.

Go deeper: Index Investing 101 — The Beginner’s Guide to Wealth Building · What a Vanguard Index Fund and Doing Absolutely Nothing Have In Common (And Why It's Made Lazy Investors Rich) · Index Investing Calculator

Inflation

The general rise in prices over time, which means each dollar buys a little less every year.

Money kept in cash quietly loses value when inflation is higher than the interest it earns. That is why long-term money needs to be invested, and why returns are best judged after inflation (the real return).

Example At 3% inflation, $100 today buys only what about $74 buys now after 10 years.

Go deeper: This 6 Proven Investment Strategies Will Protect Your Purchasing Power and Beat Inflation · How to Start Investing in Stocks?

IRA

An individual retirement account: a US account you open yourself, with tax advantages for retirement saving.

Unlike a 401(k), it isn’t tied to your job. A Traditional IRA may give a tax deduction now; a Roth IRA gives none now but tax-free withdrawals in retirement. For 2026 the contribution limit is $7,500. (The UK’s closest equivalents are the ISA and the SIPP.)

Go deeper: How to Start Investing With $100 a Month (Without Picking Stocks or Paying Fees) · Roth or Traditional 401(k)? The Tax-Bracket Question That Settles It

L

Lifestyle creep

Spending more as you earn more, so a raise never actually improves your savings.

It happens gradually: a nicer apartment, a newer car, more takeout. A simple guard is to save a fixed share of every raise before you get used to it.

Example A raise that adds $5,000 a year after tax changes nothing if all of it is spent. Save half and you add $2,500 a year to your savings.

Go deeper: The Lifestyle Creep That Quietly Eats Your Next Raise (And the 50% Rule That Stops It) · The Illusion of Financial Security: Why More Money Isn’t Always the Answer

M

Mortgage

A loan to buy a home, repaid in monthly installments over many years, with the home as security.

Each payment covers interest and some of the principal (the amount borrowed). Early payments are mostly interest; later ones mostly principal. If you stop paying, the lender can take the home.

Example A $240,000 mortgage at 6.5% over 30 years costs about $1,517 a month before taxes and insurance.

Go deeper: Should You Pay Off Your Mortgage Early or Invest the Difference? Here's the Maths · Think You Can Afford That Dream Home? The Harsh Reality of Being House Poor · Mortgage Calculator

N

Net worth

Everything you own minus everything you owe.

It is the single best measure of financial progress, better than income. It can be negative early on, especially with student loans; what matters is that it trends up.

Example $5,000 in savings, a car worth $8,000 and $12,000 in a 401(k) add up to $25,000 of assets. Minus a $15,000 student loan and a $3,000 card balance, your net worth is $7,000.

Go deeper: 5 Numbers Worth Checking Before Summer Ends (A Mid-Year Financial Review That Takes 10 Minutes) · 9 Essential Financial Concepts Every Young Professional Needs to Master to Become Financially Literate

O

P

Passive investing

Buying and holding low-cost funds that track the whole market, instead of trying to pick winning stocks or time trades.

Active investing tries to beat the market through research and trading. Over long periods most active funds fail to beat their index after fees, which is why passive investing is the default recommendation for most people.

Go deeper: What a Vanguard Index Fund and Doing Absolutely Nothing Have In Common (And Why It's Made Lazy Investors Rich) · Active Trading or Passive Investing? Here’s Why Passive Strategies Win in Volatile Markets · Index Investing Calculator

R

Real return

Your investment return after subtracting inflation: how much more you can actually buy.

A 7% return sounds good, but if prices rose 3% your purchasing power grew by only about 4%. Planning in real terms keeps long-range projections honest.

Example A 7% return with 3% inflation is a real return of about 3.9% ((1.07 ÷ 1.03) − 1), close to the quick estimate of 7% − 3% = 4%.

Go deeper: This 6 Proven Investment Strategies Will Protect Your Purchasing Power and Beat Inflation · How Much Do You Actually Need to Retire? The 4% Rule, Explained Without the Maths Anxiety

Rebalancing

Bringing your portfolio back to its target mix after market moves have pushed it off course.

If stocks do well, they grow into a bigger share of your portfolio than you planned, and your risk rises with them. Rebalancing, once a year or when a mix drifts by more than about five percentage points, trims what grew and tops up what lagged.

Example Plan 80% stocks and 20% bonds; after a strong year you hold 88/12. Selling some stock (or directing new money to bonds) brings you back to 80/20.

Go deeper: What Is Portfolio Rebalancing and Why You Need It? Steal This Proven Framework Now to Keep Your Portfolio on Course · How Much of Your Portfolio Should Be in Stocks at Your Age? (And Why '100 Minus Your Age' Is Outdated)

Risk tolerance

How much ups and downs in your investments you can accept, financially and emotionally, without selling at the wrong time.

Being able to afford a loss and being able to sit through one are different things. An honest answer to "what would I do if my portfolio dropped 30%?" is a good guide to your asset allocation.

Go deeper: How Much of Your Portfolio Should Be in Stocks at Your Age? (And Why '100 Minus Your Age' Is Outdated) · Why a $100 Loss Hurts Twice as Much as a $100 Gain Feels Good (And Why It's Quietly Costing You)

S

Savings rate

The share of your take-home pay that you save or invest.

It is the biggest lever you control: a higher savings rate means both more money going in and a lower spending level to fund later, so it shortens the road to financial independence from two directions.

Example Save $600 a month from $4,000 of take-home pay and your savings rate is 15%.

Go deeper: 5 Numbers Worth Checking Before Summer Ends (A Mid-Year Financial Review That Takes 10 Minutes) · The Lifestyle Creep That Quietly Eats Your Next Raise (And the 50% Rule That Stops It)

Sequence of returns risk

The risk that bad investment years arrive just as you start withdrawing money, doing lasting damage even if average returns are fine.

Selling investments to live on after a fall locks in losses and leaves less to recover. The same fall 20 years into retirement, or before you start withdrawing, does much less harm. Holding some cash and bonds near retirement is the usual defense.

Go deeper: The Quiet Retirement Risk Most Investors Ignore (Until It's Too Late) · How Much Do You Actually Need to Retire? The 4% Rule, Explained Without the Maths Anxiety

T

Tax-advantaged account

An account where your investments grow with a tax break, such as a 401(k), IRA or HSA in the US, or an ISA or SIPP in the UK.

The break comes either now (a deduction on what you put in) or later (tax-free withdrawals), and either way the money isn’t taxed every year as it grows. The trade-off is limits on how much you can add and rules on when you can take it out.

Go deeper: The Complete Guide to Tax-Efficient Investing: 6 Proven Steps for Smarter Wealth Growth · Roth or Traditional 401(k)? The Tax-Bracket Question That Settles It

Tax bracket

A band of income taxed at a particular rate. Only the income inside each band is taxed at that band’s rate.

Moving into a higher bracket never makes you worse off overall: only the dollars above the threshold are taxed at the higher rate. Your top bracket (the marginal rate) is what matters for decisions like Roth versus Traditional.

Example Suppose the 22% bracket started at $50,000 (the real thresholds change every year). Earning $52,000 means only $2,000 is taxed at 22%; the rest is taxed at the lower rates.

Go deeper: Roth or Traditional 401(k)? The Tax-Bracket Question That Settles It · What to Do With Your Tax Refund Before You Spend It (A 5-Step Decision Tree for Your 20s and 30s)

V

Volatility

How much and how quickly an investment’s price moves up and down.

Volatility is not the same as losing money: a fund can swing sharply and still grow over time. It is the price of the higher long-term returns stocks have offered, and the reason money you need soon shouldn’t be in them.

Go deeper: Why a $100 Loss Hurts Twice as Much as a $100 Gain Feels Good (And Why It's Quietly Costing You) · Active Trading or Passive Investing? Here’s Why Passive Strategies Win in Volatile Markets

Education, not financial advice. These are general definitions to help you understand the terms; they can’t take your situation into account.