What does a bank actually do?

Educational only. This is not financial or legal advice, and it doesn't recommend any bank, lender or program.

1. The basic idea

• Deposits become loans. People and businesses put money in the bank. The bank lends much of it to others: a family buying a house, a shop buying stock, a farmer buying seed in spring.
• Interest flows both ways. Savers are paid interest for leaving their money there. Borrowers pay interest for using it. The difference between the two helps pay for the bank's building, staff and losses.
• Moving money. Checking accounts, debit cards and the direct deposit that puts a paycheck in your account all run through banks.
• Deposits are insured. In the FDIC's words: "FDIC deposit insurance covers $250,000 per depositor, per FDIC-insured bank, for each account ownership category." And: "Since the FDIC was founded in 1933, no depositor has lost a penny of FDIC-insured funds." https://www.fdic.gov/resources/deposit-insurance/understanding-deposit-insurance

2. How banks fit with small shops and farms

• Startup and building loans for opening a shop, buying a building, or fixing one up.
• Lines of credit, money a business can draw on when it needs to, such as for payroll in a slow season (see Where does your paycheck come from?), then pay back.
• Equipment loans: a cooler, a delivery van, a tractor.
• SBA-guaranteed loans. The U.S. Small Business Administration doesn't usually lend the money itself. In SBA's words, "The 7(a) loan program, SBA's primary business loan program, provides a loan guarantee to lenders..." The money can go to uses like real estate, working capital, equipment or buying an existing business. "The maximum loan amount for a 7(a) loan is $5 million," and "You will always work directly with your lender and not with SBA." https://www.sba.gov/loans/7a-loans/
• Farm lending
• The Farm Credit System: "The FCS is the largest agricultural lender in the United States. It is a nationwide network of lending institutions that are owned by their borrowers." It was created by Congress in 1916 and today has 4 banks and 55 associations (Farm Credit Administration, https://www.fca.gov/about/fca-in-brief ; https://www.fca.gov/bank-oversight/about-banks-and-associations).
• USDA Farm Service Agency (FSA) has "a special focus on the particular credit needs of farmers and ranchers who are in their first 10 years of operation." FSA defines a beginning farmer as one who "Has not operated a farm or ranch for more than 10 years," among other tests (https://www.fsa.usda.gov/resources/beginning-farmers-and-ranchers-loans).
• One test: for ownership loans, the farmer can't already own more than 30% of the county's average-size farm. Lincoln County's 2022 average was 187 acres, so that's about 56.1 acres here (calculated, using the Census of Agriculture figure in By the numbers).
• FSA also makes Youth Loans for 4-H and FFA projects (see Grow up farming).

3. Community banks

• FDIC 2020 Community Banking Study (year-end 2019 data): "community banks represent 15 percent of the industry's total loans but 30 percent of its CRE loans, 36 percent of small business loans, and 70 percent of agricultural loans." https://www.fdic.gov/resources/community-banking/report/2020/2020-cbi-study-4.pdf (CRE means commercial real estate.)
• FDIC Risk Review 2025: "As of December 31, 2024 ... Community banks maintained an outsize share—21.6 percent—of the industry's total small business loans despite holding only 15.2 percent of total industry loans." https://www.fdic.gov/analysis/2025-risk-review.pdf
• The two reports measure small-business loans in different ways, so we don't compare 36% with 21.6% as a trend.
• FDIC Community Banking Study (2012): "Community banks tend to be relationship lenders, characterized by local ownership, local control, and local decision making." https://www.fdic.gov/regulations/resources/cbi/report/cbi-full.pdf

4. Risk on both sides

• The bank's risk: it is lending its depositors' money. If a loan isn't repaid, the bank takes the loss.
• The owner's risk: small-business owners often sign a personal guarantee, meaning they promise to repay from their own pocket if the business can't. Some put up their house or land as collateral.
• For SBA loans, the federal rule reads: "Holders of at least a 20 percent ownership interest generally must guarantee the loan." 13 CFR 120.160(a), https://www.ecfr.gov/current/title-13/chapter-I/part-120/subpart-A
• This is part of what "risking their capital" means in What it takes to keep a shop open.

5. Banks on the square, then and now

• History. The City of Fayetteville's historic square tour says that before 1903, saloons around the square "were interspersed with dry goods stores, groceries, hardware businesses, tailoring establishments, drugstores, banks, doctor's, and lawyer's offices." It also says that on the east side, "For over a century a bank under various guises operated" in part of a building now used by another business. https://fayettevilletn.com/community/things_to_do/historic_tour/fayetteville_square.php
• We did not find verified records of a 1930s bank failure in Lincoln County, or of which buildings carry "BANK" in their stonework. The National Register districts in Fayetteville that we found are residential.
• Now, in totals only. The FDIC Summary of Deposits counts deposits as of June 30 each year.

• Source: FDIC Summary of Deposits, public API, county 47103 (https://api.fdic.gov/banks/sod). In 2026 every listed branch city was Fayetteville.
• Calculated: about $21,700 per county resident (2025 population 36,853).
• Caveats:
• This counts deposits booked at those branches, not where the money came from or where it is lent.
• Credit unions aren't included because they are insured separately, by the NCUA.
• Amounts are nominal.
• The Almanac's directory lists local banks. This piece doesn't name or rank any.

Square Detective: The city's tour says a bank operated on the east side of the square for over a century. What clues might show which building it was: a heavy door, columns, a cornerstone, a vault?

6. How do banks make money, and what does that mean for a town?

Where a bank's income comes from

• Net interest income: interest collected on loans and investments, minus interest paid to depositors.
• Fees: for services like overdrafts, wire transfers or account services.
• Investment income, for example from government bonds.

The whole industry, second quarter 2026 (FDIC Quarterly Banking Profile, Q2 2026, https://www.fdic.gov/quarterly-banking-profile/quarterly-banking-profile-second-quarter-2026.pdf):

• "The banking industry reported NIM of 3.32 percent in second quarter 2026." (NIM is net interest margin.) The FDIC adds: "The community bank NIM increased to 3.81 percent."
• Net interest income was $197.4 billion and noninterest income $96.1 billion that quarter. Calculated: noninterest income was about 32.7% of net operating revenue.
• Losses are a real cost: "The industry's net charge-off rate decreased 2 basis points to 0.57 percent from the prior quarter." A charge-off is a loan the bank no longer expects to collect.

Puzzle: the Town Bank (ALL NUMBERS PRETEND)

1. Townspeople deposit $100. The bank pays them 1% interest for the year. Interest paid out: ______ ($1.00)
2. The bank lends $80 at 7%. If every loan is paid back, interest collected: ______ ($5.60)
3. The bank's costs (a teller, the lights, the building): $2.50. What's left? ______ ($5.60 − $1.00 − $2.50 = $2.10)
4. Twist: one $10 loan isn't paid back. Now interest comes in on only $70 ($4.90), and the bank loses the $10. What's left? ______ ($4.90 − $1.00 − $2.50 − $10.00 = −$8.60)
How many good loans does it take to make up for one that goes bad?

Ways a bank connects to a town's economy

• Where deposits are lent: money deposited here may be lent here, or lent somewhere else.
• Who makes the decision: a loan officer who knows the town, or a process somewhere far away.
• Jobs: tellers, loan officers and the staff at each branch.
• Taxes: like other property owners, banks pay property taxes on their buildings.
• We didn't pull Lincoln County figures on bank jobs or bank property taxes.

What do you notice?

• If everyone in town saved at a bank 500 miles away, where might the loans go?
• Why might a local banker say yes to a farmer that a big-city computer says no to? Why might it go the other way?
• Why would a bank lend to someone it knows?
• What would you need to show a banker?

7. Puzzle: the lemonade-stand loan (ALL NUMBERS PRETEND)

You borrow $40 at the start of summer to buy a pitcher, a table, cups and a sign. The lender charges 10% for the summer.
1. How much do you owe in all? ______ ($44)
2. You'll pay it back in 8 equal weekly payments. How much each week? ______ ($5.50)
3. Each cup costs you $0.25 in lemons, sugar and the cup, and sells for $1. How much do you keep per cup? ______ ($0.75)
4. How many cups would you sell just to pay back the loan? ______ (59 cups, since 58 cups is $43.50)
5. It rains for two weeks. What happens to your payments?

8. Buying a place without a bank (and with one)

Educational only. This is not legal or financial advice. For a real purchase in Tennessee, the people to ask are a Tennessee real estate attorney and a housing counselor.

What do you notice?

• Why would a seller agree to be the bank?
• What could go wrong for the buyer? What could go wrong for the seller?
• Which of these options needs a bank, and which doesn't?