Plain-English definitions for the words nobody explains.

3–6 months of essential expenses in cash savings. The buffer that stops every other plan from unraveling.

See the emergency fund guide and the sizing calculator.

The sequence for what to do with each dollar: deductibles → match → debt → fund → Roth → 15% → goals → debt → wealth.

See the order of operations guide and walkthrough.

The share of your gross pay you put toward the future — retirement contributions, the employer match, and other long-term saving — measured against gross, not take-home. The single habit that most shapes when work becomes optional.

See the savings rate calculator.

A dedicated savings bucket for a specific upcoming expense — a car, holiday gifts, an annual insurance premium — funded monthly so the cash is already there when the bill arrives. Distinct from an emergency fund, which is for the unforeseeable.

Assign every dollar of income a job — spending, saving, giving, or debt payoff — until nothing is left unassigned. The leftover is what drifts; naming it is what makes a budget stick.

See the budget builder.

Compensation for work — employee (W-2) wages or self-employment (1099) income. Required to contribute to an IRA. Allowance, gift money, and investment income don't count.

Total earnings before taxes, FICA, and any deductions. The number on your offer letter. 401(k) deferral percentages run on this.

What lands in your bank after taxes and deductions. Useful for budgeting; misleading for retirement-savings percentages (always anchor those on gross).

Adjusted Gross Income. Gross income minus certain deductions (Traditional 401(k) contributions, HSA, etc.). Used to determine eligibility for many tax breaks.

Modified Adjusted Gross Income (AGI) with certain items added back. Used for Roth IRA income limits and ACA (Affordable Care Act) subsidies.

The whole value of a job — wage plus benefits (health coverage, retirement match, paid time off), not just the number on the paycheck. Benefits often add roughly a third again on top of the wage.

See the job offer comparator.

Money contributed before income tax is deducted. Lowers taxable income today; you pay tax later when you withdraw.

Money contributed after income tax. No upfront deduction; growth and qualified withdrawals are tax-free.

Account or contribution that receives preferential federal-tax treatment — pre-tax in (401(k), Traditional IRA), tax-free growth (529, HSA, Roth), or both. Umbrella term for the wrappers that beat a plain brokerage on after-tax math.

Investments grow without annual taxation. Tax is paid on withdrawal. Traditional 401(k)/IRA work this way.

Investments grow with no annual tax AND withdrawals are tax-free. Roth 401(k)/IRA and HSA (for medical) work this way.

When you inherit an asset in a taxable account, its cost basis resets to its value on the date of death — so the gain built up during the prior owner’s life is never taxed to you. It does not apply to inherited retirement accounts.

See the inherited-portfolio lesson.

The rate on your last dollar of income. Different from your "effective" (average) tax rate, which is lower.

See the tax bracket explorer.

Total federal income tax owed divided by income. "Of gross" answers what fraction of your paycheck goes to tax; "of taxable income" matches the IRS form. Both are always lower than your top marginal bracket.

See the tax bracket explorer — it shows both.

Gross income minus deductions (standard or itemized). The base your federal brackets apply to — never your full salary.

A fixed amount subtracted from gross income before brackets apply. Set by filing status; most people take it instead of itemizing.

Federal Insurance Contributions Act — payroll tax for Social Security (6.2%) and Medicare (1.45%). Comes out of every employee (W-2) paycheck, before federal income tax.

Employer-sponsored retirement account funded with pre-tax (Traditional) or after-tax (Roth) payroll deferrals.

See the 401(k) guide.

Same idea as a 401(k), but for public schools, hospitals, and certain non-profits. Same contribution limits.

Individual Retirement Account. Opened by you, not your employer. Lower limits than a 401(k) but more investment flexibility.

See the IRA guide.

IRA funded with after-tax dollars. Growth and qualified withdrawals are tax-free. Income limits apply.

A Roth IRA opened for a minor by a parent or guardian acting as custodian. Same rules as a regular Roth — including the earned-income requirement — until the minor reaches the age of majority.

See the teen Roth IRA guide.

IRA funded with pre-tax dollars (if eligible). Withdrawals taxed as ordinary income in retirement.

Health Savings Account. Triple tax-advantaged: pre-tax in, tax-free growth, tax-free out for medical. Requires a high-deductible health plan (HDHP).

See the HSA guide.

High-Deductible Health Plan. Required to be eligible to contribute to a Health Savings Account (HSA).

State-sponsored education savings account. Tax-free growth, tax-free withdrawals for qualified education.

See the 529 guide.

Taxable investment account with no contribution limits and full liquidity. Long-term gains taxed at lower rates.

An online savings account (HYSA) paying a market interest rate — FDIC-insured, fully liquid, and built to keep pace with inflation rather than beat it.

A fund that holds every stock in an index (e.g., S&P 500), proportionally. Low fees, broad diversification, no manager picking stocks.

A low-risk fund of short-term debt held inside a brokerage account — pays a money-market yield but, unlike a bank account, is not FDIC-insured.

Exchange-Traded Fund. Like a mutual fund but trades like a stock. Most index funds today are ETFs.

A fund that auto-rebalances from stocks toward bonds as you approach a retirement year (e.g., Target Date 2055). Good default for set-and-forget investors.

Annual fee charged by a fund, as a % of assets. Anything above 0.20% is suspect; 0.05% or less is excellent.

Earnings on earnings. Each year your previous gains also generate gains. Calculator: compound growth.

What $1 saved today grows into at age 65. Drops off a cliff with age — $1 at 20 ≈ $88; $1 at 40 ≈ $12 (10% nominal, monthly compounding).

See the mental models guide and compound growth calculator.

Investing a fixed amount on a regular schedule, regardless of price. Default if you contribute every paycheck.

See the DCA guide.

How your portfolio is split between stocks, bonds, and other asset classes. The single biggest driver of long-term returns.

The pre-set schedule by which a target-date fund shifts from stocks toward bonds as it approaches its target year. The reason a Target Date 2055 fund holds a different mix today than it will in 2050.

One basis point equals 0.01% — one hundredth of a percent. Used for small fee differences and rate moves. A fund charging 5 bps costs 0.05%; a Fed rate cut "of 25 bps" is 0.25%.

Net Asset Value. A mutual fund's per-share price, calculated once per day after market close (total assets minus liabilities, divided by shares outstanding). Mutual fund trades execute at the next NAV; ETFs trade continuously at market price.

A share of stock is fractional ownership of a real company — a claim on its profits and assets, and usually a vote. Own more shares, own more of the company.

See the guide to owning stocks.

A company's total stock-market value: the share price times the number of shares outstanding. "Large-cap" and "small-cap" simply sort companies by this size.

A regulated marketplace — like the NYSE or Nasdaq — where investors buy and sell shares from each other after a company has issued them.

A published list of companies used to track a slice of the market — the S&P 500 (500 large U.S. companies), the Dow, the Nasdaq Composite. You don't buy an index directly; an index fund copies it.

See the guide to owning stocks.

A share of a company's profits paid out to shareholders in cash, usually quarterly. Many companies pay none, reinvesting profits to grow instead.

See the guide to owning stocks.

Initial Public Offering. The first sale of a company's shares to the public — turning a private company into one whose stock anyone can buy on an exchange.

A company's profit divided by its number of shares — its profit measured per slice of ownership. Over the long run, a stock's price tracks its earnings per share.

See the guide to why markets rise.

A drop of 10% or more (but less than 20%) from a recent market high. Common — historically about once a year — and usually short-lived.

See the guide to when markets fall.

A drop of 20% or more from a recent high. The SEC marks the line at 20%+ over at least two months. Historically arrives every few years and averages about a 35% fall.

See the guide to when markets fall.

Buying something with no earnings engine, hoping a later buyer pays more — a near-zero-sum bet, unlike an investment that owns a slice of a business that earns on its own.

See the guide to speculation vs. investing.

Annual Percentage Rate. The yearly interest rate on a debt. Above ~7%, prioritize payoff over investing extra.

See the debt payoff guide for the three-tier framing.

Pay off smallest debt first. Behaviorally optimal — each finished debt builds momentum.

See the debt payoff guide and payoff calculator.

Pay off highest-APR debt first. Mathematically optimal — minimizes total interest.

See the debt payoff guide and payoff calculator.

How a loan payment splits between interest and principal. Early payments are mostly interest; late payments are mostly principal.

See the debt payoff guide (for consolidation context), the mortgages guide, and the mortgage payoff calculator.

The amount you originally borrowed, separate from interest (the cost of borrowing it). Each payment chips at both, but interest is charged on the principal you still owe, so the balance falls slowly at first.

See the debt payoff guide and the mortgages guide.

Money Guy Show car-buying constraint: 20% down, 3-year max loan, and a monthly car payment under 8% of gross income. The 8% cap is the binding one and applies to the payment itself, not total transportation costs.

See the mental models guide.

The base interest rate U.S. banks charge their most creditworthy borrowers — moves with the Fed's target rate. Most variable-rate consumer debt (credit cards, HELOCs, private student loans) prices at "Prime + a margin."

Saving on a Valuable Education — a federal income-driven student-loan repayment plan introduced in 2023; currently paused by court injunction, with payments and forgiveness eligibility on hold. Verify current status at studentaid.gov before relying on it.

When unpaid interest is added onto a loan's principal — at the end of a forbearance, a deferment, or when leaving certain plans — so future interest is charged on the larger balance. The reason a paused balance comes back bigger.

See the student loans guide.

When a monthly payment is smaller than the interest accruing that month, so the unpaid interest is added to the balance and it grows even while you pay. Common on income-driven student-loan payments set below the interest.

See the student loans guide.

The decline in a car's value over time — a new car typically loses 15–20% in year one and over half by year five, on a schedule that ignores your loan.

See the guide to buying a car.

The markup a dealer adds to the wholesale "buy rate" a lender approves you at, keeping much of the difference — commonly 1–2.5 percentage points on top of the lender's rate.

See the guide to buying a car.

The full total to buy a car including every tax and fee — the only price worth negotiating, because it can't hide costs in the monthly payment or the loan term.

See the guide to buying a car.

Owing more on a loan than the asset is worth — also called being "underwater"; common on long, low-down-payment car loans.

See the guide to buying a car.

When a lender takes back a financed car after missed payments — possible in most states after roughly two missed payments, without a court order, leaving you owing any auction shortfall.

See the guide to buying a car.

The mind's tendency to lean on the first number it sees — like a car's sticker price — so every later figure is judged against it; the counter is to bring your own reference number.

See the guide to buying a car.

A lender's estimate of how likely you are to repay, from 300 to 850 — built mostly from whether you pay on time and how much of your available credit you use.

See the credit score guide.

The share of your available credit you're using — your balance divided by your limit. Lower is better; staying under about 30% is a common soft target, not a hard line.

See the credit score guide.

A lender's full credit check when you apply for new credit. Each can nick your score a little and stays on your report about two years; rate-shopping for a single loan in a short window usually counts as one.

A credit check that does not affect your score — checking your own score, a pre-approved offer, or an employer or landlord screen.

The file the credit bureaus keep on your borrowing — accounts, balances, payment history, and inquiries. Free weekly from each bureau at annualcreditreport.com; your credit score is calculated from it.

See the credit score guide.

The variety of credit types you manage — revolving (credit cards) and installment (loans). A minor scoring factor; not worth taking on debt you don't need just to diversify it.

A credit report with too little history to generate a score — common for young adults, recent arrivals, and people who avoid credit. Also called being "credit invisible." Not a low score; there's simply nothing to score yet.

A lender approving a loan by verifying your income, savings, and payment history (rent, utilities) by hand, instead of relying on a credit score — the main path to a mortgage for a borrower with no score.

See the mortgages guide.

Software (such as Fannie Mae's Desktop Underwriter or Freddie Mac's Loan Product Advisor) that assesses a mortgage application in seconds against the lender's rules. When it can't approve a file — a no-score or thin-file borrower, say — the loan moves to manual underwriting.

A record of on-time payments that don't normally reach the credit bureaus — rent, utilities, insurance, phone — used to build a credit picture for a borrower with little or no traditional credit history.

A loan secured by real estate, typically thirty years, repaid in monthly principal-and-interest installments. The largest single debt most households ever take on.

See the mortgages guide.

Adjustable-Rate Mortgage. Fixed rate for an introductory period (commonly 5, 7, or 10 years), then resets to a market-tied rate at each adjustment.

See the mortgages guide.

Private Mortgage Insurance. Required on conventional loans when the down payment is under 20%; protects the lender, not the borrower. Removable at 80% loan-to-value (LTV) by request, automatic at 78%.

See the mortgages guide.

Upfront fees paid at closing to lower the interest rate. One point typically equals 1% of the loan amount and lowers the rate by about 0.25 points. Worth it only if you keep the loan past the break-even month.

See the mortgages guide.

A servicer-held account that collects monthly portions of property taxes and homeowners insurance, then pays the bills on your behalf once a year.

See the mortgages guide.

Principal, Interest, Taxes, Insurance — the four pieces bundled into a typical monthly mortgage payment.

See the mortgages guide and mortgage payoff calculator.

The cash a borrower has left each month after the mortgage, debts, taxes, and basic living costs. The central qualifying test for VA loans, and a compensating factor in manual underwriting generally.

See the mortgages guide.

Loan-to-Value ratio. The loan balance divided by the home value. Above 80% triggers private mortgage insurance (PMI) on conventional loans; at 78% PMI auto-cancels.

See the mortgages guide.

Homeowners Association. Monthly or annual dues on condos, townhomes, and many planned communities. Not part of the loan but part of the true monthly housing cost.

The share of your home's value you actually own — its market value minus what you still owe on the mortgage. It grows as you pay down the balance and as the home appreciates.

See the refinancing guide.

Home Equity Line of Credit. A revolving loan secured by your home's equity, priced at the prime rate plus a margin. Cheaper than a credit card but still debt; banks can freeze unused capacity in downturns, and since 2018 federal tax reform the interest is only deductible when proceeds go to buying or improving the same home.

Replacing your current mortgage with a new one — usually for a lower rate or different term. The old loan is paid off by the new one, with a fresh set of closing costs. Worth it only if the monthly savings outrun those costs before you sell or refinance again.

See the refinancing guide.

For a refinance, the month the lower payment finishes earning back the closing costs: closing costs ÷ monthly savings. Before it you are still in the hole; after it the savings are yours. The single number that decides a rate-and-term refi.

See the refinancing guide.

A refinance where you borrow more than you owe and take the difference in cash, secured by your home. Distinct from a rate-and-term refinance (same balance, better terms). Caution: it converts unsecured or short-term debt into a decades-long loan against the house.

See the refinancing guide.

A rough estimate of what a lender might lend you, based on numbers you provide without verification. Quick, free, and not very binding — sellers treat it as informal interest, not proof you can close.

A conditional commitment from a lender after verifying your income, assets, and credit. Comes with a letter sellers take seriously. Stronger than pre-qualification, but still subject to underwriting once you have a specific property.

Debt-to-Income ratio. Your total monthly debt payments divided by gross monthly income. Most conventional lenders cap the total around 43%; Federal Housing Administration (FHA) loans can stretch higher. Determines how much loan you qualify for.

Fees charged at signing — origination, title, recording, transfer tax, escrow setup, and more. Typically 2–5% of the loan amount. Separate from the down payment.

The total funds the buyer must bring to closing: down payment + closing costs + prepaids, minus any credits or earnest money already deposited. The single most important number on the closing disclosure.

A deposit the buyer puts up when an offer is accepted, typically 1–3% of the purchase price. Held in escrow during contract; credited toward closing if the deal closes, forfeited if the buyer backs out without a covered contingency.

A licensed appraiser's independent estimate of the property's market value, ordered by the lender. If it comes in below the contract price, the lender will only lend against the appraised value — the buyer brings extra cash, the seller drops the price, or the deal falls apart.

A condition in a purchase contract that lets the buyer back out without forfeiting earnest money. Common ones: financing, inspection, appraisal, and home-sale contingencies. Waiving contingencies makes an offer stronger and riskier.

A federally required 3-page document a lender must provide within 3 business days of a complete application. Standardized format makes lender-to-lender comparisons direct — compare loan estimates, not headline rates.

A federally required 5-page document the lender must provide at least 3 business days before closing. Final version of the loan estimate with the actual numbers. Sign nothing until you've compared it line-by-line to the loan estimate you accepted.

Two policies sold at closing: the lender's policy (required, protects the lender) and the owner's policy (optional, protects you against ownership-claim disputes). The owner's policy is one-time at closing and lasts as long as you own the home.

A lender's guarantee to hold a quoted rate for a set period (typically 30–60 days) while underwriting completes. Without a lock, the rate can drift with the market and your deal's economics change.

A mortgage that meets Fannie Mae and Freddie Mac's size and quality limits ($832,750 baseline for 2026; higher in expensive counties). Conforming loans get the best rates because Fannie and Freddie will buy them from the lender.

A mortgage not backed by a government program (FHA, VA, USDA). Most conventional loans are conforming. Typically requires 5–20% down and decent credit; private mortgage insurance (PMI) applies under 20% down.

The lender's risk assessment — verifying income, assets, credit, property value, and title. Where pre-approval turns into a final approval (or a "conditional" approval pending specific documents). The slowest stretch of a closing timeline.

Often shortened to "comp." A recent sale of a similar property used to support an appraisal or pricing decision. Appraisers usually need three comps closed within the last 6 months and within a mile of the subject property.

An amount the seller agrees to pay toward the buyer's closing costs as part of the negotiated price. Capped by loan type: 3% for conventional with under 10% down, 6% for Federal Housing Administration (FHA) loans. Functionally a hidden price reduction structured as a closing-cost credit.

Money your employer contributes to your 401(k), often as a % of what you contribute. Always capture the full match — it's a 50–100% guaranteed return.

How long you must work before employer-contributed funds are yours to keep. Common: cliff (up to 3 yrs all-or-nothing) or graded (20% per year).

Required Minimum Distribution. Mandatory annual withdrawal from Traditional 401(k)/IRA starting at age 73 (rising to 75). Roth doesn't have RMDs in your lifetime.

Full Retirement Age for Social Security. 66 to 67 depending on birth year. The age at which you get 100% of your earned benefit.

See the Social Security guide.

Heuristic that a 4% initial withdrawal — adjusted for inflation each year — has historically lasted 30 years. Useful starting point, not a guarantee.

The 4% rule read backwards: target nest egg ≈ 25 × annual spending. The single multiplication that turns a target lifestyle into a portfolio number.

See the mental models guide.

Retirement-savings benchmark expressed as multiples of your annual income — e.g. 1× by 30, 3× by 40, 6× by 50, ~10× by retirement (Fidelity, T. Rowe Price, JPMorgan).

See the mental models guide.

The risk that a bad market in your first decade of retirement drains your portfolio faster than a bad market later would. A few bad early years are harder to recover from than a few bad late years.

The balance that, invested today and left alone at a normal return, grows to your retirement target by 65 with no further contributions. Reaching it means you could pause saving and still arrive.

See the mental models guide.

What a future dollar amount is worth today, discounted by the return it would earn in the meantime. The mirror of compounding: compounding grows today's money forward; present value pulls a future target back.

The share of your portfolio you take in your first year of retirement, then adjust for inflation each year — the 4% rule is the best-known example. It sizes the nest egg but doesn't say what to do when markets move.

See the withdrawal strategies guide.

A withdrawal rule (Guyton-Klinger) with an upper and lower trigger around current spending: hit the lower rail in a downturn and you trim income a set step; hit the upper rail and you give yourself a raise. Between them, spending holds steady.

See the withdrawal strategies guide.

Holding a few years of spending in cash and short-term bonds so a market drop never forces you to sell stocks at the bottom; the rest stays invested for the long haul. Also called time-segmentation.

See the withdrawal strategies guide.

Guaranteed Asset Protection — covers the gap between what you owe and what a car is worth if it's totaled while you're underwater; far cheaper from your own insurer or a credit union than from a dealer.

See the guide to buying a car.

Preferred Provider Organization — a health plan with a higher premium and lower deductible than a high-deductible health plan, and no health savings account eligibility. Best if you have ongoing prescriptions or regular specialist care.

See the insurance guide.

Insurance that replaces part of your income for a few months (often 3–6) if illness or injury stops you working; usually offered through an employer, it bridges the gap until long-term disability insurance starts.

See the insurance guide.

The waiting stretch between when a disability begins and when long-term disability insurance starts paying — often 90 days; your emergency fund (or short-term disability coverage) covers the gap.

See the insurance guide.

The savings sub-account inside a permanent life policy (e.g. whole life), funded only after each month's insurance and commission costs come out. Grows slowly; reaching it means borrowing against your own policy.

Pays a death benefit if you die during a fixed term. Cheap, simple. The right kind of life insurance for almost everyone who needs life insurance.

Permanent life insurance with a cash-value component. Almost always overpriced for what it does. Skip.

See the insurance guide.

Replaces ~60% of gross income if you can't work due to illness or injury. The most overlooked insurance for working-age adults.

The amount you pay out of pocket before insurance starts paying. Hold cash equal to your biggest deductible (usually health) — it's the buffer between a bad week and a bad year.

Life Insurance Retirement Plan. Marketing language for an indexed universal life (IUL) policy pitched as a tax-advantaged retirement wrapper; fees and crediting caps usually leave term life plus a brokerage account ahead.

In an indexed universal life (IUL) policy, the share of the linked index's gain credited to your cash value before the cap applies — often 60–100%, set by the insurer and adjustable later.

A legal document naming who receives the assets that pass through your estate, and — if you have minor children — who raises them. State-specific in how it must be signed and witnessed.

See the estate planning guide.

The person you name directly on an account (401(k), IRA, life insurance) to receive it at your death. It transfers the money outside the will — and overrides whatever the will says.

See the estate planning guide.

The backup beneficiary who inherits an account or policy if the primary beneficiary has died before you. Naming one keeps the asset from falling back into probate.

See the estate planning guide.

The court process that validates a will and transfers the assets that pass through it. Public, sometimes slow and costly — which is why beneficiary designations and TOD/POD registrations, which skip it, matter.

See the estate planning guide.

A registration that names who inherits a brokerage account (TOD) or bank account (POD) directly at your death, skipping probate. The account is fully yours while you live; the named person gets it after.

See the estate planning guide.

Dying without a valid will. State law then decides who inherits — a default order that may not match what you would have chosen, and that always runs through probate.

See the estate planning guide.