This chapter introduces the financial institutions that hold, protect, and move money for individuals and households. Banks and credit unions are not just convenient places to keep cash. They are regulated institutions with specific rules, products, costs, and protections that directly affect how much money a person pays in fees, earns in interest, and keeps safe from loss.

Students who understand financial institutions can open the right accounts, avoid unnecessary fees, choose between competing options, and know what protections apply when something goes wrong. Students who do not understand these institutions often pay more, earn less, and carry more risk than necessary.

By the end of this chapter, you should be able to explain what banks and credit unions are and how they differ, describe the main types of financial accounts and how they work, calculate basic account interest and fee scenarios, compare accounts using cost and benefit criteria, and identify the protections that apply to federally insured deposits.

Most people interact with the financial system through a financial account. A financial account is a record-keeping relationship between a person and a financial institution. The institution holds your money, tracks your transactions, and provides access to your funds through various payment tools.

Without a financial account, everyday financial life becomes harder and more expensive. People without accounts often rely on check-cashing services, which charge fees to convert paper checks into cash. They may pay to buy money orders for bills instead of writing a check or initiating a free transfer. They cannot easily receive direct deposit of a paycheck. They have no record of their saving. They may keep cash at home, where it earns nothing and is vulnerable to theft or loss.

A basic financial account does several things at once. It keeps money safe. It creates a transaction record. It provides access to the payment system — the network of electronic transfers, debit cards, bill payments, and automated transactions that most modern financial life runs on. It may earn a small amount of interest. And it provides legal protections that cash kept at home does not.

Economists and researchers use the term banked to describe individuals and households with at least one account at a financial institution. The term unbanked describes those without any such account. Millions of households are unbanked or underbanked — they have some account access but rely heavily on alternative financial services such as check cashing, payday lending, or money orders.

Being unbanked is often expensive. The fees paid to cash checks, purchase money orders, and access financial services outside the banking system can add up to hundreds of dollars per year — money that a person with a free or low-cost checking account would keep. Understanding financial accounts and how to access them is one of the most practical financial skills a person can develop.

Two major types of depository institutions accept deposits from the public and offer financial accounts: commercial banks and credit unions. A depository institution is any financial institution that accepts deposits — money placed by customers — and holds those deposits in accounts.

A commercial bank is a for-profit financial institution that accepts deposits, makes loans, and provides financial services to individuals, businesses, and organizations. Commercial banks are owned by shareholders. Their goal is to earn profit for those shareholders by charging for loans, earning interest on assets, and collecting fees on accounts and services.

Commercial banks are regulated at both the federal and state level. National banks are chartered by the federal government and regulated primarily by the Office of the Comptroller of the Currency (OCC). State-chartered banks that are members of the Federal Reserve System are regulated by the Federal Reserve. The most important consumer protection for bank customers is FDIC insurance, which is covered in detail in Section 5.7.

A credit union is a not-for-profit financial cooperative owned by its members. Every person who has an account at a credit union is a member and a partial owner of that institution. Credit unions exist to serve their members rather than to earn profit for outside shareholders.

Credit unions are organized around a field of membership — a defined group of people eligible to join. Today, many credit unions have expanded their fields of membership, and some serve anyone who lives or works in a certain geographic area. Because credit unions do not distribute profit to outside shareholders, they often return value to members in the form of lower loan rates, higher savings rates, and lower fees. Credit unions are regulated primarily by the National Credit Union Administration (NCUA).

Online banks are banks that operate primarily or entirely through digital channels — no physical branches. Because they have lower operating costs, they often offer fewer fees and higher interest rates on savings accounts than traditional banks. The tradeoff is the absence of in-person service and, sometimes, fewer ATM options. Online banks are FDIC-insured if they are chartered banks — their lack of branches does not reduce depositor protections.

A checking account is a deposit account designed for frequent transactions. Today checking accounts support electronic transfers, debit card purchases, online bill payment, and mobile payments. When you deposit money into a checking account, the institution holds those funds on your behalf and records the balance. When you make a payment, the institution reduces your balance by the payment amount and sends those funds through the payment network to the recipient.

An overdraft occurs when you spend more than your available balance. Banks and credit unions handle overdrafts in several ways. The institution may simply decline the transaction. It may approve the transaction and charge an overdraft fee — historically $25 to $35 per transaction, though many institutions have reduced or eliminated these fees under regulatory and competitive pressure. Or it may offer overdraft protection, linking your checking account to a savings account or line of credit that automatically covers shortfalls — typically for a much smaller fee than a standard overdraft charge.

A savings account is a deposit account designed for storing money over time rather than for frequent daily transactions. Savings accounts typically earn interest on the balance and have fewer transaction features than checking accounts — no debit card, limited check writing, and possible restrictions on how often you can make withdrawals.

Savings accounts earn interest — a periodic payment made by the institution to the account holder in exchange for the use of the deposited funds. Banks take customer deposits and use them to fund loans. The interest paid to depositors is part of the cost of that funding.

A high-yield savings account is a savings account that offers a higher interest rate than a standard savings account — particularly common at online banks with lower overhead costs. A high-yield savings account at an FDIC- or NCUA-insured institution is just as safe as any other insured savings account. The higher rate reflects the institution's business model, not higher risk to the depositor.

Fees are among the most important factors to evaluate when comparing financial accounts. Fees reduce the effective value of holding an account. A checking account with a $12 monthly fee costs $144 per year — money that leaves your account without providing financial benefit. Before choosing an account, calculate the realistic annual cost of fees based on how you actually use a bank account.

The most effective strategies for avoiding common account fees include: setting up direct deposit if required for fee waiver; maintaining the minimum balance if feasible; using only in-network ATMs or choosing an account that reimburses ATM fees; opting for electronic statements instead of paper; monitoring balances to avoid overdrafts; and choosing accounts with no minimum balance requirements from the start.

One of the most important and least understood consumer protections in personal finance is deposit insurance — a government-backed guarantee that protects depositors when a bank or credit union fails.

When a bank or credit union becomes insolvent and cannot meet its obligations, deposit insurance prevents depositors from losing their money up to specified limits. The government steps in and makes depositors whole, even if the institution cannot. This protection is why you do not need to worry about whether your bank is having a bad quarter before you deposit your paycheck — as long as your institution is insured and your deposits are within coverage limits, your money is safe from institutional failure.

The Federal Deposit Insurance Corporation (FDIC) is an independent federal agency that insures deposits at banks and savings institutions. FDIC coverage is $250,000 per depositor, per insured bank, per ownership category. The ownership category distinction matters: a single account in your name alone, a joint account with another person, and a retirement account (IRA) at the same bank fall into different ownership categories — meaning a single person could have more than $250,000 protected at one institution if accounts are held under different categories.

For most individuals: if you have less than $250,000 on deposit at a single FDIC-insured bank across all accounts in your name, your deposits are fully protected.

The National Credit Union Administration (NCUA) provides equivalent protection for credit union members through the National Credit Union Share Insurance Fund (NCUSIF). Coverage is $250,000 per member, per insured credit union, per ownership category — essentially identical to FDIC coverage in structure and limits. Federal credit unions are required to be NCUA-insured. Most state-chartered credit unions are also NCUA-insured.

Some institutions may check your banking history using a service called ChexSystems, a consumer reporting agency that tracks negative banking history such as unpaid overdrafts, fraud flags, and forced account closures. If your ChexSystems report shows negative history, some institutions will decline to open an account. However, many credit unions and banks offer second-chance checking accounts specifically for people with negative banking history who are working to establish or rebuild a banking relationship.

When you open an account, you agree to an account agreement (also called deposit agreement or account disclosures). This document describes all fees and when they are charged, interest rates and how they are calculated, overdraft policies and options, how the institution can change account terms, and your rights and responsibilities as an account holder. Account agreements can be long and written in dense language — but knowing where to find yours matters. When a fee surprises you, the account agreement is usually where the answer is.

Once your account is open, ongoing management involves monitoring your balance regularly through the mobile app, online portal, or account alerts; reviewing statements monthly to catch errors, unauthorized transactions, or unexpected fees; keeping contact information current so the institution can reach you about account issues or suspicious activity; and responding promptly to fraud alerts when the institution contacts you about unusual transactions.

Choosing a financial institution is a practical decision that should be made by comparing specific accounts and features against your actual needs. The following five-step framework helps organize that comparison.

Financial accounts are tools. The right tool depends on your specific situation, and your situation will change over time. The following scenarios illustrate how people at different life stages and financial situations might think about account selection.

Use the following account information to complete the comparison checklist from Section 5.9, then answer the questions below.

Personal financial accounts do not exist in isolation. When you deposit money into a checking or savings account, that money enters a larger financial system. The institution uses those deposits — pooled with deposits from many other customers — to fund loans to other customers and businesses, to hold in reserve as required by regulation, and to invest in other financial assets. The interest you earn on your savings account is one output of this process: the institution pays you a portion of what it earns from using your deposit.

This flow of money — from savers to institutions to borrowers and back again — is one of the most fundamental functions of the financial system. Banks and credit unions act as financial intermediaries: they stand between those with excess funds (depositors) and those who need funds (borrowers), providing a more efficient and safer system than if every saver had to find and directly lend to every borrower.

Deposit insurance reinforces this system by maintaining public confidence. If depositors feared that any bank failure would wipe out their savings, they might withdraw funds at the first sign of trouble — causing exactly the kind of bank failure they feared. Deposit insurance breaks this cycle by assuring depositors that their money is safe regardless of the institution's short-term condition.