Personal Finance Glossary

Plain-English definitions of the terms used most often on FinSavvy Daily. Each entry links to the related concepts you'll see across our articles and calculators.

Annual Percentage Rate (APR): The yearly cost of borrowing, expressed as a percentage and including most fees.; APR shows what a loan or credit card actually costs over a year, combining the interest rate with mandatory fees. Two loans with the same interest rate can have very different APRs. APR is not the same as APY (Annual Percentage Yield), which is what you earn on a savings account.; Related: Annual Percentage Yield (APY), Compound Interest
Annual Percentage Yield (APY): The yearly return on a savings account or CD, including the effect of compounding.; APY tells you what a savings product will actually pay over twelve months, assuming you don't withdraw the money. Because it includes compounding, APY is always slightly higher than the stated nominal interest rate.; Related: Compound Interest, High-Yield Savings Account
Compound Interest: Interest earned on both your original deposit and on previously earned interest.; Compounding is the engine behind long-term savings and investing. The more often interest compounds (daily versus monthly versus yearly), the faster the balance grows. Compounding works against you on debt: unpaid credit-card interest is added to your balance and then itself accrues interest.; Related: APY, Dollar-Cost Averaging
Credit Utilization Ratio: How much of your available credit you are using, expressed as a percentage.; Calculated as (current balances ÷ total credit limits) × 100. It is one of the largest factors in your FICO score. Most credit experts suggest keeping it below 30%; below 10% is ideal for the highest scores.; Related: FICO Score, Credit Report
Debt Avalanche: A debt-payoff method that targets the highest-interest debt first.; You pay minimums on every debt, then send every extra dollar to the debt with the highest APR. Mathematically optimal — saves the most money over time — but slower to deliver psychological wins than the Snowball method.; Related: Debt Snowball, APR
Debt Snowball: A debt-payoff method that targets the smallest balance first.; Popularized by Dave Ramsey. You pay minimums on every debt, then send every extra dollar to the smallest balance, regardless of interest rate. Costs slightly more than the Avalanche method but produces fast early wins, which research shows helps people stick with the plan.; Related: Debt Avalanche
Dollar-Cost Averaging (DCA): Investing a fixed amount on a regular schedule, regardless of price.; You commit to investing, say, $200 every two weeks. When prices are high your $200 buys fewer shares; when prices fall it buys more. Over long periods this smooths your average cost and removes the emotional pressure of trying to time the market.; Related: Index Fund, ETF
Emergency Fund: Cash set aside specifically for unexpected expenses, kept in a safe, liquid account.; Most personal-finance writers suggest a starter fund of $1,000–$2,000 while you pay off debt, then a fully-funded version equal to three to six months of essential expenses. Park it in a high-yield savings account, not in stocks.; Related: High-Yield Savings Account, Sinking Fund
ETF (Exchange-Traded Fund): A basket of investments — usually tracking an index — that trades like a single stock.; ETFs typically have very low fees and provide instant diversification. A single broad-market ETF such as one tracking the S&P 500 holds hundreds of companies. ETFs can be bought and sold during market hours at the current market price.; Related: Index Fund, Mutual Fund
FICO Score: The most widely used U.S. credit score, ranging from 300 to 850.; Calculated by Fair Isaac Corporation from the data in your credit reports. Roughly 35% of the score is on-time payment history, 30% is credit utilization, 15% is length of credit history, 10% is credit mix, and 10% is new credit.; Related: Credit Utilization Ratio, Credit Report
High-Yield Savings Account (HYSA): An online savings account that pays meaningfully more interest than a typical bank.; Usually offered by online-only banks with lower overhead, HYSAs are FDIC-insured up to $250,000 per depositor per bank. As of 2026, top HYSAs pay roughly ten to twenty times the national average savings rate.; Related: APY, Emergency Fund
Index Fund: A mutual fund or ETF that holds every stock in a market index, in the same proportion.; Index funds aim to match a market — not beat it. Decades of research (the SPIVA Scorecard among them) show that most active funds fail to beat their index over long periods. Low fees and broad diversification make index funds a default recommendation for most long-term investors.; Related: ETF, Dollar-Cost Averaging
Roth IRA: A U.S. retirement account funded with after-tax money, with tax-free growth and tax-free withdrawals in retirement.; You pay income tax on contributions today, then never owe tax on the gains as long as you follow the withdrawal rules. Especially valuable for younger savers who expect to be in a higher tax bracket later. Contribution limits and income phase-outs apply each year.; Related: Traditional IRA, 401(k)
Sinking Fund: Money set aside in advance for a specific upcoming expense, like a car repair or holiday gifts.; Different from an emergency fund: a sinking fund is for known, expected costs that don't fit comfortably in one paycheck. You divide the total by the months until you'll need it and save that amount each month.; Related: Emergency Fund, Zero-Based Budgeting
Zero-Based Budgeting: A budgeting method where every dollar of income is given a job before the month begins.; Income minus categorized spending and savings should equal zero. Forces you to confront unassigned dollars, which is where most overspending hides. Popularized by YNAB and Dave Ramsey but the concept dates back to corporate finance in the 1970s.; Related: 50/30/20 Rule, Sinking Fund
50/30/20 Rule: A budgeting framework that splits after-tax income into 50% needs, 30% wants, and 20% savings/debt.; Popularized by Senator Elizabeth Warren in All Your Worth (2005). A useful mental model, but the real-world fit varies wildly with income and cost of living — in expensive metros, needs alone can exceed 50%.; Related: Zero-Based Budgeting

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Personal Finance Glossary

Plain-English definitions of the terms used most often on FinSavvy Daily. Each entry links to the related concepts you'll see across our articles and calculators.

Annual Percentage Rate (APR): The yearly cost of borrowing, expressed as a percentage and including most fees.; APR shows what a loan or credit card actually costs over a year, combining the interest rate with mandatory fees. Two loans with the same interest rate can have very different APRs. APR is not the same as APY (Annual Percentage Yield), which is what you earn on a savings account.; Related: Annual Percentage Yield (APY), Compound Interest
Annual Percentage Yield (APY): The yearly return on a savings account or CD, including the effect of compounding.; APY tells you what a savings product will actually pay over twelve months, assuming you don't withdraw the money. Because it includes compounding, APY is always slightly higher than the stated nominal interest rate.; Related: Compound Interest, High-Yield Savings Account
Compound Interest: Interest earned on both your original deposit and on previously earned interest.; Compounding is the engine behind long-term savings and investing. The more often interest compounds (daily versus monthly versus yearly), the faster the balance grows. Compounding works against you on debt: unpaid credit-card interest is added to your balance and then itself accrues interest.; Related: APY, Dollar-Cost Averaging
Credit Utilization Ratio: How much of your available credit you are using, expressed as a percentage.; Calculated as (current balances ÷ total credit limits) × 100. It is one of the largest factors in your FICO score. Most credit experts suggest keeping it below 30%; below 10% is ideal for the highest scores.; Related: FICO Score, Credit Report
Debt Avalanche: A debt-payoff method that targets the highest-interest debt first.; You pay minimums on every debt, then send every extra dollar to the debt with the highest APR. Mathematically optimal — saves the most money over time — but slower to deliver psychological wins than the Snowball method.; Related: Debt Snowball, APR
Debt Snowball: A debt-payoff method that targets the smallest balance first.; Popularized by Dave Ramsey. You pay minimums on every debt, then send every extra dollar to the smallest balance, regardless of interest rate. Costs slightly more than the Avalanche method but produces fast early wins, which research shows helps people stick with the plan.; Related: Debt Avalanche
Dollar-Cost Averaging (DCA): Investing a fixed amount on a regular schedule, regardless of price.; You commit to investing, say, $200 every two weeks. When prices are high your $200 buys fewer shares; when prices fall it buys more. Over long periods this smooths your average cost and removes the emotional pressure of trying to time the market.; Related: Index Fund, ETF
Emergency Fund: Cash set aside specifically for unexpected expenses, kept in a safe, liquid account.; Most personal-finance writers suggest a starter fund of $1,000–$2,000 while you pay off debt, then a fully-funded version equal to three to six months of essential expenses. Park it in a high-yield savings account, not in stocks.; Related: High-Yield Savings Account, Sinking Fund
ETF (Exchange-Traded Fund): A basket of investments — usually tracking an index — that trades like a single stock.; ETFs typically have very low fees and provide instant diversification. A single broad-market ETF such as one tracking the S&P 500 holds hundreds of companies. ETFs can be bought and sold during market hours at the current market price.; Related: Index Fund, Mutual Fund
FICO Score: The most widely used U.S. credit score, ranging from 300 to 850.; Calculated by Fair Isaac Corporation from the data in your credit reports. Roughly 35% of the score is on-time payment history, 30% is credit utilization, 15% is length of credit history, 10% is credit mix, and 10% is new credit.; Related: Credit Utilization Ratio, Credit Report
High-Yield Savings Account (HYSA): An online savings account that pays meaningfully more interest than a typical bank.; Usually offered by online-only banks with lower overhead, HYSAs are FDIC-insured up to $250,000 per depositor per bank. As of 2026, top HYSAs pay roughly ten to twenty times the national average savings rate.; Related: APY, Emergency Fund
Index Fund: A mutual fund or ETF that holds every stock in a market index, in the same proportion.; Index funds aim to match a market — not beat it. Decades of research (the SPIVA Scorecard among them) show that most active funds fail to beat their index over long periods. Low fees and broad diversification make index funds a default recommendation for most long-term investors.; Related: ETF, Dollar-Cost Averaging
Roth IRA: A U.S. retirement account funded with after-tax money, with tax-free growth and tax-free withdrawals in retirement.; You pay income tax on contributions today, then never owe tax on the gains as long as you follow the withdrawal rules. Especially valuable for younger savers who expect to be in a higher tax bracket later. Contribution limits and income phase-outs apply each year.; Related: Traditional IRA, 401(k)
Sinking Fund: Money set aside in advance for a specific upcoming expense, like a car repair or holiday gifts.; Different from an emergency fund: a sinking fund is for known, expected costs that don't fit comfortably in one paycheck. You divide the total by the months until you'll need it and save that amount each month.; Related: Emergency Fund, Zero-Based Budgeting
Zero-Based Budgeting: A budgeting method where every dollar of income is given a job before the month begins.; Income minus categorized spending and savings should equal zero. Forces you to confront unassigned dollars, which is where most overspending hides. Popularized by YNAB and Dave Ramsey but the concept dates back to corporate finance in the 1970s.; Related: 50/30/20 Rule, Sinking Fund
50/30/20 Rule: A budgeting framework that splits after-tax income into 50% needs, 30% wants, and 20% savings/debt.; Popularized by Senator Elizabeth Warren in All Your Worth (2005). A useful mental model, but the real-world fit varies wildly with income and cost of living — in expensive metros, needs alone can exceed 50%.; Related: Zero-Based Budgeting

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