Personal Finance Glossary

The annual cost of borrowing money, expressed as a percentage. Unlike APY, APR does not account for compounding. Used on credit cards, mortgages, and loans. A credit card with 24% APR charges approximately 2% per month on your outstanding balance.

The actual annual return on a savings account or investment, accounting for compound interest. Higher than the nominal interest rate when compounding occurs more than once per year. Always compare HYSAs using APY, not the nominal rate.

The division of an investment portfolio among different asset classes — typically stocks, bonds, and cash. Asset allocation is the primary driver of long-term investment returns and risk. A common rule of thumb: subtract your age from 110 to find your approximate stock percentage (e.g., at 35, hold ~75% stocks).

The process of paying off a debt through regular installment payments over time. Early payments go mostly toward interest; later payments go mostly toward principal. Understanding amortization explains why making even small extra payments to a mortgage early saves significant interest.

A period when stock prices fall 20% or more from recent highs, typically lasting several months. Bear markets are a normal part of market cycles. Historically, the average bear market lasts about 9.6 months and is followed by a recovery. Long-term investors who stay invested tend to recover and surpass prior peaks.

When your monthly expenses exceed your income. A personal budget deficit forces you to draw down savings or take on debt. Identifying and eliminating a budget deficit is the foundational step of financial recovery. See our budgeting guide for strategies.

A period when stock prices rise 20% or more, typically over months or years. Bull markets tend to last longer than bear markets — the average bull market since 1928 has lasted approximately 2.7 years and produced an average return of 114%.

Profit realized from the sale of an asset (stock, real estate, etc.) that has increased in value. Short-term gains (assets held less than 1 year) are taxed as ordinary income. Long-term gains (held 1+ year) are taxed at preferential rates of 0%, 15%, or 20% depending on income.

A savings product offered by banks that pays a fixed interest rate in exchange for keeping funds deposited for a set term (3 months to 5 years). CDs typically offer higher rates than standard savings accounts but charge penalties for early withdrawal. FDIC-insured up to $250,000.

Interest calculated on both the initial principal and the accumulated interest from previous periods. Often called "the eighth wonder of the world," compounding is the mathematical engine behind long-term wealth building. $10,000 at 7% compounded annually becomes $76,123 in 30 years without any additional contributions.

The percentage of your total available revolving credit that you're currently using. Calculated by dividing your total credit card balances by your total credit limits. Accounts for 30% of your FICO score. Keeping utilization below 10% maximizes your score; above 30% begins to hurt it significantly.

A debt payoff strategy where you make minimum payments on all debts and put all extra money toward the highest-interest-rate debt first. Mathematically optimal — minimizes total interest paid over the payoff period. Best for disciplined, analytically motivated individuals. See our credit guide.

A debt payoff strategy where you pay off debts in order of smallest balance first, regardless of interest rate. Provides motivational wins from eliminating accounts. Research shows higher completion rates than the avalanche for people who struggle with motivation.

The practice of spreading investments across different asset classes, sectors, geographies, and securities to reduce risk. The core principle: if one investment falls, others may hold steady or rise. A diversified portfolio is less volatile than any single investment it contains.

Investing a fixed dollar amount at regular intervals (e.g., $400 every month) regardless of market conditions. When prices are high, you buy fewer shares; when prices are low, you buy more. Over time, DCA lowers your average cost per share compared to investing a lump sum at a market peak.

A reserve of liquid savings (typically 3–6 months of essential expenses) kept in an accessible account for unexpected expenses or income loss. Prevents the need to go into debt for car repairs, medical bills, or job loss. Best kept in a high-yield savings account separate from everyday checking.

The annual fee charged by a mutual fund or ETF as a percentage of assets under management. A 1% expense ratio costs you $100/year per $10,000 invested — and dramatically compounds over decades. Index funds typically charge 0.03%–0.20%, while actively managed funds charge 0.5%–2.5%.

Federal Deposit Insurance Corporation protection on bank deposits, covering up to $250,000 per depositor per bank, per account category. If an FDIC-insured bank fails, your money is guaranteed by the U.S. government. Always verify FDIC insurance before depositing at any online bank or credit union (credit unions use NCUA instead).

The most widely used credit scoring model, ranging from 300–850. Calculated from five factors: payment history (35%), credit utilization (30%), length of credit history (15%), credit mix (10%), and new credit inquiries (10%). Scores above 740 qualify for the best interest rates on mortgages and auto loans.

An employer-sponsored retirement savings plan funded with pre-tax dollars. Contributions reduce taxable income in the year they're made; withdrawals in retirement are taxed as ordinary income. Many employers match contributions up to a percentage — always contribute at least enough to capture the full match. 2025 limit: $23,500 ($31,000 if 50+).

A tax-advantaged savings account for people enrolled in a high-deductible health plan (HDHP). Offers triple tax benefits: contributions are pre-tax, growth is tax-free, and withdrawals for qualified medical expenses are tax-free. After age 65, funds can be withdrawn for any purpose (taxed as ordinary income). 2025 limits: $4,300 individual / $8,550 family.

A savings account — typically offered by online banks — that pays significantly higher interest than traditional savings accounts. As of 2025, top HYSAs offer 4.5%–5.1% APY vs. the national average of ~0.45%. FDIC-insured and fully liquid, making them ideal for emergency funds and short-term savings goals.

A type of mutual fund or ETF that passively tracks a market index (like the S&P 500) rather than being actively managed. Index funds consistently outperform the majority of actively managed funds over 15+ year periods, primarily because of their lower fees. Warren Buffett has recommended them for most individual investors.

The rate at which the general price level of goods and services rises over time, eroding purchasing power. The U.S. Federal Reserve targets 2% annual inflation. At 3% inflation, $100,000 today has the purchasing power of just $54,379 in 20 years — illustrating why keeping money in a low-yield savings account destroys wealth over time.

A personal retirement savings account with tax advantages. Traditional IRAs offer a potential tax deduction on contributions (pay taxes on withdrawal). Roth IRAs offer tax-free growth and withdrawal (no deduction upfront). Both have a 2025 contribution limit of $7,000 ($8,000 if age 50+).

How quickly and easily an asset can be converted to cash without significantly affecting its value. Cash is perfectly liquid. A savings account is highly liquid. Real estate is illiquid — it can take months to sell. When building an emergency fund, prioritize liquidity over yield.

The total value of everything you own (assets) minus everything you owe (liabilities). Assets include cash, investments, real estate, and vehicles. Liabilities include mortgage balance, student loans, car loans, and credit card debt. Tracking net worth monthly is one of the most motivating practices in personal finance.

The process of realigning a portfolio back to its target asset allocation after market movements have shifted the proportions. For example, if stocks outperform and grow from 70% to 80% of your portfolio, rebalancing involves selling some stocks and buying bonds to return to 70/30. Typically done annually or when allocations drift more than 5%.

A retirement account funded with after-tax dollars, providing tax-free growth and tax-free withdrawals in retirement. No required minimum distributions (RMDs) during the owner's lifetime. Income limits apply: in 2025, eligibility phases out above $150,000 (single) and $236,000 (married filing jointly).

Money saved in advance for a specific, anticipated future expense — such as car maintenance, annual insurance premiums, holiday gifts, or a vacation. Sinking funds prevent large predictable expenses from disrupting your budget or forcing you into debt. The term comes from accounting, where a "sinking fund" is set aside to retire debt.

A stock market index tracking the 500 largest publicly traded U.S. companies by market capitalization. Widely considered the benchmark for U.S. stock market performance. The S&P 500 has returned an average of approximately 10.5% annually over the last 50 years, though with significant year-to-year variation.

Your total income before any deductions, taxes, or withholdings. Gross income includes wages, salary, tips, freelance earnings, rental income, dividends, and any other sources of revenue. It differs from net income (take-home pay), which is what remains after taxes and deductions are subtracted.

Good debt typically has a low interest rate and funds something that increases in value or generates income — such as a mortgage or student loan for a high-earning career. Bad debt carries a high interest rate and funds depreciating assets or consumption — such as credit card debt or auto loans on expensive vehicles. The distinction matters because not all debt should be eliminated at the same speed.

The tax rate applied to your last dollar of income — i.e., the highest bracket you fall into. Because the U.S. uses a progressive system, your marginal rate applies only to income above the bracket threshold, not to your entire income. A person in the 22% bracket does not pay 22% on all their income — only on income within that bracket range.

A type of savings account that typically offers higher interest rates than standard savings accounts and may include limited check-writing and debit card privileges. Money market accounts are FDIC-insured and require higher minimum balances than regular savings accounts. They are distinct from money market funds, which are not FDIC-insured.

The original amount of money borrowed (on a loan) or invested (in an account), before interest is applied. On a mortgage of $300,000, the principal is $300,000 — your monthly payments are split between repaying principal and paying interest. Early in a loan, most of your payment goes to interest; later, more goes to principal (amortization).

The complete collection of financial investments held by an individual or institution, including stocks, bonds, ETFs, real estate, cash, and other assets. A well-constructed portfolio is diversified across asset classes and aligned with the investor's time horizon, risk tolerance, and financial goals.

A tax deduction reduces your taxable income, saving you money at your marginal rate. A $1,000 deduction in the 22% bracket saves you $220. A tax credit directly reduces your tax bill dollar-for-dollar — a $1,000 credit saves $1,000 regardless of your bracket. Credits are almost always more valuable than deductions of the same dollar amount.

Life insurance that provides a death benefit if the policyholder dies within a specified term (10, 20, or 30 years). It is the simplest and most affordable form of life insurance. Financial planners generally recommend term life for most people with dependents — a 20-year, $500,000 policy for a healthy 30-year-old typically costs $25–$35/month.

An interest rate that fluctuates over time based on an underlying benchmark rate, such as the federal funds rate or SOFR. Variable-rate mortgages (ARMs), credit cards, and some student loans carry variable rates. When benchmark rates rise, your interest payments rise too — making variable rates riskier than fixed rates in a rising-rate environment.

The timeline an employer uses to determine when an employee gains full ownership of employer contributions to a 401(k) or other benefit. Under a 3-year cliff vesting schedule, you own 0% of employer contributions until year 3, then 100% immediately. Under graded vesting, ownership builds gradually (e.g., 20%/year). Always check your vesting schedule before changing jobs.

An IRS form completed by employees to tell their employer how much federal income tax to withhold from each paycheck. Claiming too many allowances results in underpayment and a tax bill; too few results in overpayment and a large refund (essentially an interest-free loan to the government). Update your W-4 after major life changes — marriage, divorce, having a child, or a significant income change.

The disparity in financial assets and resources between different groups — most commonly measured between income quintiles, racial groups, or generations. Understanding the wealth gap contextualizes why personal finance habits alone don't fully explain financial outcomes and why systemic factors — access to credit, homeownership history, educational investment — also play a significant role in household wealth accumulation.

A budgeting method where income minus all expenses (including savings and investments) equals zero — meaning every dollar is assigned a specific purpose at the start of the month. Popularized by Dave Ramsey and the YNAB app. Eliminates "mystery spending" and forces intentional allocation of every dollar earned. See our full budgeting guide.