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What Are Interest Rates and How Do They Work?

Explore our in-depth guide on interest rates and how they influence borrowing and saving.

Interest rates are a crucial aspect of borrowing and saving. But what is an interest rate? At its core, an interest rate represents the price of using someone else's money, such as a lender, bank or credit union. Expressed as a percentage of the principal amount, you can find interest rates in various financial transactions, including decisions ranging from personal savings to loans. 

A combination of factors shapes the dynamics of interest rates. These rates influence the broader economy, impacting consumer spending, business investment and the overall direction of financial markets. Understanding interest rates is crucial for individuals managing personal finances to improve their financial literacy and ensure they make the best decisions about their money.

What Is an Interest Rate?

An interest rate is a financial metric representing the cost of borrowing money or the return on investment for a savings vehicle. How do interest rates work? It's expressed as a percentage of the principal amount — the initial sum of money involved in the transaction. In borrowing, the interest rate signifies the price that a borrower pays to use funds provided by the lender. Conversely, for inventors, it represents the compensation earned. 

The interest rate is a crucial component of various financial instruments and transactions, including the overall cost of credit and the profitability of investments. It's typically applied over a specific period, known as the loan or investment term, and can be structured differently. 

Interest rates play a central role in shaping economic activities, impacting everything from personal loans and mortgages to business financing and the valuation of assets. 

What Is the Difference Between APR vs. APY?

Annual percentage rate (APR) and annual percentage yield (APY) are both important financial metrics, but they're used in different contexts. 

APR is a measure of the cost of borrowing, expressed as a yearly interest rate. It includes both the interest charged on a loan and any additional fees or costs associated with borrowing. APR is calculated by considering the interest rate and any fees over the loan term. This metric is commonly used for loans and credit cards to help borrowers understand the total cost of borrowing over the course of a year, making it easier to compare different loan offers. 

Conversely, APY is a measure of the annualized interest earned on an investment, such as a savings account or other interest-bearing accounts. It considers a process called "compounding," which reflects both the stated interest rate and how often that interest is compounded. APY is relevant for savings accounts, share certificates and other investments. It gives savers a more accurate understanding of how much their money will grow over time. 

Why Is it Important to Understand Interest Rates?

Understanding interest rates is crucial because they can profoundly impact both borrowing and saving. In borrowing, interest rates tell you the cost of credit. When interest rates are higher, the cost of borrowing increases. Borrowers pay more in interest over the life of a loan, affecting the affordability of mortgages, auto loans and other forms of credit. This is especially crucial if you're creating a budget and want to know how various loans may affect your spending habits. 

When it comes to saving, higher interest rates mean a greater return on investments. This is particularly important for savings accounts and share certificates. High interest rates, especially when compounded, contribute to the growth of savings over time. This is beneficial for individuals saving for long-term goals, such as retirement or education. 

Which Accounts Have Interest Rates?

Again, interest rates impact the cost of borrowing and the return on investments. Understanding how it's applied across different types of accounts is crucial for individuals managing their finances. From securing a home through a mortgage to building savings in a bank account, each financial instrument comes with its own interest rate dynamics. 

How interest rates can impact borrowing and spending
  • Mortgage loans: Mortgage loans typically involve long-term commitments, commonly spanning 15 to 30 years. The interest rates on mortgages can be fixed or variable. Fixed-rate home loans keep the same interest rate throughout the life of the loan. Variable-rate mortgages, on the other hand, can fluctuate based on market conditions. 
  • Auto loans: Auto loans are used to finance the purchase of vehicles and can last anywhere from 3 to 7 years or more. The interest accrues daily and is collected monthly when payments are made. Over time, as the balance is paid, the amount of interest is reduced.
  • Student loans: Student loans are designed to help finance education expenses. These loans may have fixed or variable interest rates. Interest on federal student loans often accrues while the borrower is in school and during the grace period after graduation. Private student loans may have different terms, and the interest application can vary. 
  • Credit cards: Credit cards allow you to make purchases on credit. Interest is applied to the remaining amount if the balance isn't paid in full by the due date. Credit card interest rates are typically higher than those for loans, running from 15% to 25% or more, making it crucial for cardholders to manage balances diligently. This can be why it's so difficult to pay off credit card debt; higher interest rates compounding monthly mean you might be in a position to constantly have to play catch up. 
  • Savings accounts: Savings accounts offer a way for individuals to earn interest on their deposits. The interest is usually compounded regularly and added to the account balance. While savings account interest rates are generally lower than those on loans, they provide a safe and accessible means of growing your money over time. 

What Factors Determine Interest Rates?

Interest rates are influenced by many factors that collectively shape the financial environment. From macroeconomic indicators to the credit history of an individual, various elements play a crucial role in determining the cost of borrowing and the return on investments.

Factors that impact interest rates

Inflation

Inflation is the rate at which prices for goods and services increase, and it dramatically influences interest rates. The goal is to maintain stable inflation levels to foster economic growth. When inflation is high, interest rates will be higher to curb spending. Conversely, during periods of low inflation, interest rates are typically lower to stimulate borrowing and economic activity. 

Credit History

It's crucial to build good credit before taking out a loan. An individual's credit history is a key factor influencing the interest rates they're offered. A higher credit score means a lower risk for the lender, resulting in lower interest rates for borrowers. Conversely, individuals with lower credit scores may face higher interest rates to compensate for the perceived risk. 

Central Bank Policies

The Federal Reserve, the central bank of the United States, plays a crucial role in shaping interest rates. This entity uses tools such as the federal funds rate and the federal discount rate to influence the overall economy.
The federal funds rate is the interest rate at which banks lend to each other overnight, impacting short-term interest rates. The federal discount rate is the interest the Fed charges banks to borrow from the Federal Reserve. The Federal Reserve can control the money supply, inflation and economic growth by adjusting these rates. In times of economic expansion, the Fed may raise rates to curb spending, while in economic downturns, it may lower rates to stimulate activity.

Loan Type

Different types of loans come with different risk profiles, impacting the interest rates assigned to them. For instance, mortgages are secured by real estate and often have lower interest rates compared to unsecured loans like credit cards. The loan's duration, whether a fixed-rate or variable-rate loan, and the purpose of the loan all contribute to the determination of interest rates. 

Wrapping Up: What Are Interest Rates?

Interest rates shape the financial landscape and should always play an important role in your financial decision-making. Whether securing a loan, managing credit, or building savings, understanding how interest rates work is essential. 

Explore the benefits of a credit union with California Credit Union. At California Credit Union, we recognize how important interest rates are to your financial journey. Our commitment is to provide competitive rates, tailored solutions and personalized service to empower our members to achieve their financial goals. Whether you're looking to secure a loan, manage your credit or find ways to save, California Credit Union is here to help. Learn more with our financial counseling to help you make the best decisions with your money.

10 Tips on How to Save Money

Saving money is more important than ever. Whether saving for a rainy day, planning a big purchase or building a nest egg for the future, every penny counts. If you’re here looking for the best ways to save money, you’ve come to the right place.

From budgeting techniques to savvy shopping strategies, let these tips empower you to make the most of your income and save more. Keep reading for our ten tips on how to save money:

Tips on how to save money include setting goals, creating a budget, automating transfers, and more.

1. Assess Your Financial Situation

Take a comprehensive look at all sources of income, including salaries, bonuses, side hustles and any other sources of revenue. Next, track your spending habits meticulously. You can use budgeting apps, spreadsheets or even pen and paper to monitor incoming and outgoing money. 

Identify where your money goes each month and categorize expenses into essentials like rent, groceries, utilities, etc. Then, make a list of non-essentials like entertainment or subscriptions. 

2. Set Financial Goals

Make your money goals specific, measurable, achievable, relevant and time-bound (SMART). Start with short-term goals, like paying off a small debt. Then, focus on medium-term goals, like saving for a down payment on a house. Finally, you can think about longer-term goals, such as retirement savings.

3. Create a Budget

A budget is a plan for your money. It helps you know how much you have coming in and how much you spend. Creating a better budget ensures you use your money wisely. 

To make a budget, take the income and expenses you calculated in tip one (above) to give you a clear picture of what’s coming in and going out. With this information, you can look for ways to cut back, like eating out less or canceling subscriptions you don’t need.

4. Automate Transfers

One of the most important tips for saving money is automating transfers from your checking account to your savings account or other accounts. This method helps you save consistently, and you can set up transfers to happen on payday or at regular intervals, like weekly or monthly. 

5. Identify Areas to Cut Spending

With your budget in hand, you should know how many of your expenses are necessities and how many are non-essential. Cutting spending means identifying ways to spend less money on the items you don’t really need, allowing you to save more. Some areas where you might be able to save include groceries, subscriptions, eating out, entertainment and more.

6. Reduce Debt

Debt can significantly affect how much you can afford to put toward savings while also impacting your credit score and ability to secure financing when needed. When you have less debt, you save money because you won’t be paying as much interest, which is the fee for borrowing money from a bank, credit card company or lender. 

Common types of debt include student loans, auto loans, mortgage and credit card debt. Building good credit and paying off debt helps to frees up money you can put into your savings.

7. Consider Refinancing

Refinancing replaces your current loan – home, auto, personal or student loan — with a new one that often has better terms like a lower interest rate or longer repayment period. This loan can help you save money in the long run because it can lower your monthly payments or reduce the total amount you’ll pay over time in interest.

8. Follow the 50/30/20 Rule

The 50/30/20 rule is a budgeting principle to help you manage your money better. Here’s how it works:

Pie chart breaking down the 50/30/20 budgeting rule, where 50% of income goes toward needs, 30% toward wants, and 20% toward savings.
    • 50% for needs: Allocate 50% of your income to cover essentials like rent or mortgage, groceries, utilities, transportation and minimum debt payments. 
    • 30% for wants: Use 30% of your income for discretionary spending — the things you won’t but don’t necessarily need. This can include dining out, entertainment, hobbies and other non-essential items. 
    • 20% for savings and debt repayment: Save or use 20% of your income for financial goals like building an emergency fund, planning for retirement or paying off debt faster.

9. Leverage Technology and Resources

Using tools and tech can make managing your money easier and help you become more financially savvy while learning how to budget and save money. A few tools you can use include:

    • Budgeting apps: Budget apps can track your spending, categorize expenses and set savings goals. 
    • Money trackers: Use these tools to monitor your expenses and income, identify trends and adjust your budget as needed. 
    • Online resources: Read blogs, articles, podcasts and videos that offer tips, advice and strategies for better money management. 
    • Financial education: Try free financial counseling services to improve your financial literacy. Talk to an advisor at your bank or credit union about budgeting, saving and investing, debt management and retirement planning.

10. Consider a Money Market Account

A money market account is essentially a credit union or bank’s version of a high-yield savings account. These accounts pay higher interest rates than most typical savings accounts. This means you can grow your money faster over time.

Money market accounts also give you easy access to your money. You can typically withdraw through checks, debit cards or electronic transfers. 

Key Takeaways: How to Save Money

Learning how to save money is a process that involves assessing and reassessing your financial situation, setting goals and creating a budget that aligns with those goals. At California Credit Union, we understand the importance of saving money and can help you achieve your financial goals. From money market accounts to personalized financial guidance, we’re here to help you make the most of your money. Become a member to start saving today.