An interest rate is the percentage of a loan that the lender charges per year for giving the borrower the privilege of using the money. For example, to take out a car loan, a dealer might charge you 8 percent of the amount you own on the loan as interest. Alternatively, when you put money in a savings account at a bank, the bank might pay you 2.5 percent per year because you’re letting the bank use your money.

Learn about the two main types of IRAs and get the details on eligibility requirements, tax benefits, contribution limits, and how to avoid penalty fees.

Financial security refers to the peace of mind you feel when you aren’t worried about your income being enough to cover your expenses. It also means that you have enough money saved to cover emergencies and your future financial goals. When you are financially secure, your stress levels goes down, leaving you free to focus on other issues.

Inflation refers to how the price for goods and services increases over time. For example, a loaf of bread that would have cost $2 10 years ago might cost $4 today. Even though you can’t nail down exactly what inflation rates will be in the future, understanding how inflation works allows you to plan for your future financial goals.

Money management refers to how you handle all aspects of your finances, from making a budget for where each paycheck goes to setting long-term goals to picking investments that will help you to reach those goals. Money management is not just about saying “no” to any purchase, but developing a plan that allows you to say “yes” to the things that are most important to you. Any amount of money can prove to be too little if you don’t have good money management skills.

Net income refers to the cash value of a paycheck after deductions. Gross income — your pay before deductions — starts with your wages for the pay period. For salaried workers, this equals your annual base salary divided by the number of pay periods in the year. Hourly workers’ gross income equals their hourly wage multiplied by hours worked, plus any overtime pay. Additional income from nonemployment sources may adjust the gross amount. Deductions can be pretax, tax or after-tax. Net income is your actual take-home pay after all adjustments.

Your net worth refers to how much more your assets are worth than your liabilities. In short, your net worth is how much money you would have if you sold everything you own and used the proceeds to pay off your debts, explains personal finance blogger Trent Hamm in the Christian Science Monitor. If the money wouldn’t be sufficient to pay off all your debts, you have a negative net worth.

Overdraft protection is a service offered by banks that issues you a short-term loan when you make a purchase with your debit card or write a check for more than your balance. However, the service comes at a cost, and it can sometimes be far more expensive than having the purchase denied.

Renting versus buying refers to the decision that people have to make when deciding where to live. The question has different answers for different people, and there’s more than just financial considerations to think about when making your decision. Renting can be less expensive up front, but owning may cost you less of the long term.