Textbook
RBS

Read Before You Sign

How to understand a financing agreement before you put your name on it.

Financing agreements are written in a specific vocabulary. If you know what the key words mean, you can answer the three questions that matter: How much am I borrowing? What does it cost in total? What happens if something goes wrong? Everything on this page is a fictional teaching example — no real store, contract, or offer is described.

A 7-step checklist

  1. 1Find the cash price, the down payment, and the amount financed (the principal) — that is what you are really borrowing.
  2. 2Find the APR — the yearly cost of borrowing as a percent. Check whether it is nominal (before compounding) or effective, and how often interest compounds.
  3. 3Find the monthly payment and the number of payments, then multiply them together.
  4. 4Compare that total with the cash price: the difference is your total repayment cost.
  5. 5Check the fees: late fee, origination fee, and any prepayment penalty.
  6. 6Check what happens if you cannot pay: collateral, default, and credit reporting clauses.
  7. 7Add up the worst case, decide before you sign, and never sign under time pressure.

An annotated fictional contract

Below is a made-up 12-month agreement for a phone. Read each numbered clause, then read the matching plain-language note underneath. Notice how every important number traces back to the amount financed: $960.

Fictional teaching example. Not a real offer, contract, or legal advice. All people, stores, and amounts are invented.

Example Only — 12-Month Phone Finance Agreement

Sample Wireless Store (fictional) · Sample Customer (fictional) · October 22, 2026

  1. 1.Cash price: $960.00. Down payment: $0.00. Amount financed: $960.00.
  2. 2.Nominal APR: 33.0% — a monthly rate of 2.75%, compounded monthly.
  3. 3.Payment: $95.01 per month for 12 months; the final payment is $95.00 to clear the balance.
  4. 4.Total of payments: $1,140.11. Finance charge: $180.11.
  5. 5.Late fee: $25 for any payment more than 10 days late.
  6. 6.Prepayment: the full balance may be paid off early with no penalty.
  7. 7.Security interest: the store keeps a legal claim on the phone until it is paid off.
  8. 8.Missed payments may be reported to credit bureaus after 30 days.

Plain-language notes

[1] principal: The original amount borrowed — the principal — is $960.00. Because the down payment is $0, it equals the full cash price. Every other number in this contract is measured against it.
[2] APR: The yearly cost of borrowing as a percent: 12 × 2.75% = 33.0%. Because interest compounds monthly, the effective yearly cost is even higher — about 38.5%.
[3] monthly payment: Multiply to see what you will actually pay: $95.01 × 11 + $95.00 = $1,140.11.
[4] finance charge: The finance charge is every dollar of interest and fees added to the $960.00 you borrowed: $1,140.11 − $960.00 = $180.11.
[5] late fee: Missing a due date adds costs and can be reported to credit bureaus.
[6] prepayment penalty: Good news: some contracts charge a fee for paying early. This fictional one does not — always look for this clause.
[7] collateral: The phone acts as collateral — if payments stop, the store can take it back.
[8] credit score: Late payments can lower your credit score, making future loans cost more.
Figure RBS.1 Annotated fictional financing agreement

Cash today or financing over time?

The same $960 phone costs $960 if you pay cash, but $1,140.11 if you finance it over 12 months — a finance charge of $180.11. The contract's nominal APR is 33.0% (2.75% per month, compounded monthly); because interest compounds, the effective yearly cost is about 38.5%. Financing is not automatically wrong — it can be worth it when you keep your cash for something more urgent — but you should always know the total before you decide.

The same $960.00 phone, two paths

Pay cash todayFinance for 12 months
Money paid today$960.00 cash price$0.00 down payment
Monthly cost$0$95.01 per month
Total paid$960.00$1,140.11
Finance charge

$1,140.11 − $960.00

$0$180.11
Nominal APR—33.0% (2.75% per month)
Effective yearly cost—About 38.5% — interest compounds monthly, so the real yearly cost is higher than the nominal APR.
What you gainThe phone is yours immediately; no debt.You keep the $960 now and build a payment history — if every payment is on time.
What can go wrongMoney is tied up in the phone.Late payments add fees and can lower your credit score.
Figure RBS.2 Cash today versus financing over 12 months (fictional)

Money Words you need here

  • principal

    The original amount of money borrowed or invested, before interest.

  • APR

    Annual percentage rate — the yearly cost of borrowing, including interest and some fees, shown as a percent.

  • loan term

    How long a loan lasts before it must be fully repaid.

  • total repayment cost

    The full amount paid over a loan's life — principal plus all interest and fees.

  • finance charge

    The total dollar cost of borrowing — all interest and fees added together, on top of the amount financed.

  • monthly payment

    The amount paid each month toward a loan or installment plan.

  • collateral

    Property a borrower promises to a lender if the loan is not repaid, such as a car.

  • late fee

    An extra charge when a payment arrives after its due date.

  • prepayment penalty

    A fee charged for paying off a loan early.

  • default

    Failing to repay a loan as agreed, which can harm credit and lead to collection.

  • cosigner

    A person who agrees to repay a loan if the borrower cannot.

  • credit score

    A number that estimates how reliably someone repays debts.

  • down payment

    Money paid upfront when financing a purchase, which reduces the amount borrowed.

  • installment plan

    Paying for something in a set number of equal payments over time.

  • interest

    The cost of borrowing money, or the earnings on money saved or invested.

Recap quiz RBS

1. A contract says “Amount financed: $960.00.” Which Money Word describes the $960.00?
2. You pay about $1,140.11 over 12 months for a $960.00 phone. What was the cost of borrowing?
3. Which term means the store can take the phone back if payments stop?
4. Which term is the yearly cost of borrowing shown as a percent?
5. Which clause should you look for before signing if you might pay the balance off early?
6. Which number shows the full amount you will pay over the life of the loan?
7. Paying only the minimum payment on a credit card usually:
8. Before financing any purchase, a smart first question is:
Answer key with explanations: Read Before You Sign
  1. principal: The principal is the original amount borrowed — $960.00. Interest and fees are added on top.
  2. $180.11: $1,140.11 − $960.00 = $180.11 — the finance charge, the total cost of borrowing beyond the cash price.
  3. collateral: The phone is collateral — property promised to the lender if the loan is not repaid.
  4. APR: APR is the annual percentage rate — the yearly cost of borrowing as a percent. This fictional contract's nominal APR is 33.0% (2.75% per month, compounded monthly).
  5. prepayment penalty: A prepayment penalty is a fee for paying off a loan early. This fictional contract has none — always check.
  6. total repayment cost: Total repayment cost = principal + all interest and fees. It is the true price of financing.
  7. keeps you in debt longer and adds interest: Minimum payments are small, so the balance lingers and interest keeps adding up. Pay more than the minimum when you can.
  8. “What is the total repayment cost?”: The monthly payment can look small while the total cost is large. Compare the total repayment cost with the cash price.