Banking basics: How banks & credit unions work
Updated February 9, 2026 | Published February 8, 2026 by Angela Talbot | Reading Time: 7 minutes
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Categories:
- Banking
Imagine you just landed your first summer job. It’s exciting to think about that first paycheck coming in. But then you realize something: where are you going to put that money? Stuffing cash into a sock drawer or a piggy bank might work for loose change, but when you start earning a real income, you need a smarter, safer plan.
Or maybe you want to buy that new video game or pair of sneakers online. You can’t exactly shove dollar bills into your laptop screen. To navigate the world of online shopping, direct deposits, and smart saving, you need a financial partner.
That’s where banks and credit unions come in. This guide breaks down the banking basics in simple terms. We will explore what these institutions actually do, the difference between checking and savings accounts, how debit cards work, and even the mystery of lending. By the end, you will have the knowledge you need to manage your money safely and effectively.
What is a Bank or Credit Union?
At their core, banks and credit unions are businesses that help people manage their money. They provide a safe place to store cash so you don’t have to carry it all around in your pocket or hide it under a mattress. But they do a lot more than just guard your dollars.
Why you need an account
Opening an account is a major step toward financial independence. Here are a few reasons why it’s a smart move:
Direct deposit
Most employers prefer to pay their staff electronically. Instead of handing you a paper check that you have to take to the teller line, the money goes straight into your account on payday. It’s faster and much more convenient. Read more about direct deposit
Easy payments
Whether you owe a friend for pizza or need to pay your cell phone bill, bank accounts let you transfer money electronically. You can use apps or online banking without ever touching physical cash.
Online shopping
To buy things from your favorite websites, you usually need a card linked to a bank account. It’s the standard way to pay for everything from streaming subscriptions to clothes.
Safety first
Keeping large amounts of cash at home is risky. It can get lost, stolen, or damaged. When your money is in a bank or credit union, it is insured by the government. Banks are typically backed by the FDIC (Federal Deposit Insurance Corporation), and credit unions are backed by the NCUA (National Credit Union Administration). This means that even if the bank were to go out of business, the government guarantees you get your money back, up usually $250,000. Read more about deposit insurance
Earn more money
It might sound strange, but financial institutions will actually pay you to keep your money with them. This is called “interest” or “dividends.” It’s a small percentage of your balance that gets added to your account over time. It’s like getting free money just for saving!
Checking vs. Savings Accounts
When you walk into a branch or visit a banking website, you will see two main options: checking accounts and savings accounts. They work together, but they are built for different purposes.
Your checking account: For daily spending
Think of a checking account as your financial center. It is where money comes in and goes out constantly. This account is designed for your everyday spending habits.
When you use a debit card to buy lunch, the money comes from here. If you need cash from an ATM, it is withdrawn from your checking balance. Because the money moves around so much, checking accounts usually don’t pay much interest. The goal of this account isn’t to grow your wealth; it’s to make your daily life easier and give you quick access to your cash whenever you need it.
Your savings account: For your goals
A savings account is a bit more relaxed. This is the place for money you don’t plan to spend right away. It is your storage unit for future plans.
Maybe you are saving up for your first car, a new phone, or college expenses. By keeping this money separate from your checking account, you are less tempted to spend it on impulse buys. To encourage you to keep your money there, financial institutions typically offer higher earning rates on savings accounts compared to checking accounts.
Your tools for spending: Debit Cards & Checks
Once you have a checking account, you need a way to use the money inside it. That is where debit cards and checks come in.
Using your debit card
A debit card looks almost exactly like a credit card, but it works very differently. It is a plastic card linked directly to your checking account. When you tap or swipe your card at a store, the bank immediately moves that money from your account to the store.
Because it is linked to your own money, you can usually only spend what you have in the account. If you have $50 in your checking account, you can’t buy a $60 video game. This makes debit cards a great tool for staying on budget. You can also use your debit card at an ATM (Automated Teller Machine) to withdraw physical cash if you need it.
What about checks?
You might not see people using checks as often as they used to, but they are still important. A check is a paper document that tells your bank to pay a specific amount of money to a specific person or company.
You fill out the date, the amount, and the name of the person you are paying, and then you sign it. You might use a check to pay for things like rent when you get your first apartment, or for school activities. It is a bit slower than a debit card, but it provides a clear paper trail of your payment.
Learn how to write and read a check
Other deposit products
Many financial institutions offer specialized accounts that can help your savings grow faster, but these options often go unnoticed. When you fully enter the workforce, you can use these accounts to make your money work harder for you. It is important to understand how these different accounts function. By learning the details of each option, you can feel empowered to choose the right tools for your financial journey and take full advantage of everything available to you.
Money Market Accounts
Money market accounts are a type of savings account that typically offer higher rates of return compared to traditional savings accounts while maintaining your flexibility to withdraw the funds. They usually require a higher minimum balance, but the higher earning potential can make it worth your while. Money market accounts often work on a tiered rate structure – meaning the more you have in the account, the higher the rate you’ll receive. Learn more about Money Market vs Savings Accounts
Certificate of Deposit (CD) and Share Certificates
A certificate of deposit, or CD, is a time deposit account where you agree to keep your money deposited for a certain period of time, typically ranging from several months up to several years. At some credit unions like Webster First, we offer a similar functioning product with slight differences, called a Share Certificate. In exchange for this commitment, financial institutions offer higher interest rates on these products compared to traditional savings accounts. It’s important to note that withdrawing money from a CD or share certificate before its maturity date may result in fees.
Learn the difference between Share Certificates and CDs
IRAs
Individual Retirement Accounts (IRAs) are special accounts designed to help you save for the future. Think of them as long-term savings plans with special tax perks from the government. At Webster First we offer two main types:
- Traditional IRA: You may get a tax break on the money you put in now, but you will pay taxes on it later when you take it out during retirement.
- Roth IRA: You pay taxes on the money before you put it in, but when you retire, the money you take out is usually tax-free.
Because these accounts are meant for your later years, there are strict rules about when you can use the money. If you need to withdraw your funds before you reach retirement age, you will usually have to pay a 10% early withdrawal penalty to the IRS, and you may also owe additional taxes.
Choosing the right plan depends on your personal goals. We recommend chatting with a financial professional or doing some research to see which one fits your future best.
How lending works
You have probably heard the word “loan” before. Lending is simply the process of borrowing money now and promising to pay it back later. It is a huge part of how the banking system operates.
From the financial institution’s side
Have you ever wondered what banks and credit unions do with the money you deposit? They don’t just lock it in a giant vault and leave it there. They actually put that money to work.
Banks and credit unions lend a portion of the money to customers – or ‘members’ at a credit union – deposit to other people who need it. When they lend this money out, they charge the borrower a fee called “interest.” This interest is the main way they make money. It is also how they can afford to pay you interest or dividends on your savings account. It is a cycle that helps the economy keep moving.
Learn why credit union’s say “members” not “customers”
Your side: borrowing money
On the flip side, customers or members need to borrow money for big purchases. Most people don’t have enough cash saved up to buy a house or a car outright. So, they take out a loan.
When you get a loan, you receive a lump sum of money to pay for your purchase. Then, you pay that money back to the bank in smaller chunks over months or years. But remember, borrowing isn’t free. You have to pay back the original amount you borrowed (called the “principal”) plus the interest.
To decide who gets a loan, banks look at a “credit score.” This is like a grade for how responsible you are with money. If you pay your bills on time, you get a high score, which tells the bank you are a safe person to lend to.
Other banking services
Banks and credit unions do a lot more than just hold money and give loans. They offer other services that can be super helpful.
- Safety Deposit Boxes: These are secure metal boxes located inside the bank’s vault. You can rent one to store valuable items like jewelry, birth certificates, or rare collectibles. It is much safer than keeping them in a shoebox at home.
- Treasurer’s Checks or Cashier’s Checks: Sometimes, if you are making a really big purchase (like buying a car from a private seller or putting a down payment on a house), a regular personal check isn’t accepted. A treasurer’s or cashier’s check is a special check guaranteed by the bank or credit union itself, so the seller knows the money is definitely there.
- Foreign Currency Exchange: If you are lucky enough to travel to another country, you will need that country’s money. Many financial institutions can swap your US dollars for other currencies so you are ready to spend when you land.
- Coin Counting Machines: Do you have a giant jar of pennies and quarters sitting in your room? Some branches have machines that will count all that loose change for you and turn it into cash in your account. Sometimes they do this for free for members, or for a small fee.
Your first step to financial freedom
Banking doesn’t have to be confusing. At its heart, it is just a system to help you keep your money safe, manage your daily spending with checking accounts, and reach your goals with savings accounts. Plus, you get access to handy tools like debit cards and loans when you need them.
Understanding these banking basics is your first step toward building a strong financial future. The sooner you start, the more comfortable you will feel managing your own cash.
Ready to take the next step? Talk to a parent or guardian about opening a teen checking account. Visiting a local branch together is a great way to meet the staff, ask questions, and see what options are right for you.