What is a loan agreement?
A loan agreement is a contract between a lender and a borrower. It puts the terms of a loan in writing, so both sides share the same understanding. That means the principal, the interest rate, the repayment schedule, and what happens on default. It turns an informal 'I'll pay you back' into an enforceable record.
The right form depends on the loan. A simple IOU or a promissory note is a one-sided promise to repay. A full loan agreement adds detailed, two-sided terms. A payment plan structures repayment of a debt you already owe, like a medical bill or past-due rent. Interest is capped by state usury laws, so the rate has to stay within your state's limit.
When do you need one?
You need a written loan whenever the amount matters more than the handshake. Lending to family or a friend is the most common case. A clear document protects the relationship and gives everyone the same memory of the terms. It also gives you something to enforce if repayment stalls.
Business borrowing is the other common case. A small-business loan sets out repayment, interest, and any personal guarantee. A personal loan agreement covers loans between individuals. Any loan with collateral, a real interest rate, or a long payoff period belongs in writing.
What a loan agreement should include
Every loan agreement names the parties and states the principal. Use full legal names for the lender and the borrower. State the exact amount borrowed and the date the money changes hands. These basics settle who owes what.
The financial terms come next. Set the interest rate within your state's usury cap, and say how interest is calculated. Lay out the repayment schedule with amounts, due dates, and a final payoff date. Add late fees and a default clause, so a missed payment has a clear consequence.
A few clauses protect the lender further. Name any collateral that secures the loan and can be claimed on default. Say whether the borrower may prepay without penalty. Close with signatures from both parties, and add a witness or notary for larger loans.
Secured vs. unsecured loans
A secured loan is backed by collateral, such as a car, equipment, or property. If the borrower defaults, the lender can claim that asset to recover the debt. Security lowers the lender's risk, so it often supports a larger loan or a lower rate. The agreement has to describe the collateral clearly.
An unsecured loan has no collateral behind it. The lender relies only on the borrower's promise and creditworthiness. If the borrower defaults, the lender's remedy is to sue for the balance. Most small family loans are unsecured, which is fine when trust is high and the amount is modest.
Interest and usury limits
Every state caps the maximum interest a lender can charge. These usury limits vary widely, and going over can void the interest or even the loan. Personal and family loans should set a rate within the cap. If you want a zero-interest loan, put that in writing too.
Federal law adds another layer for consumer credit. The Truth in Lending Act requires lenders to disclose the finance charge and the annual percentage rate. The Consumer Financial Protection Bureau oversees consumer lending practices. Our form flags your state's general limit as you fill it in.
Interest on family loans and taxes
Family loans carry a tax wrinkle worth knowing. The IRS expects even private loans to charge a minimum rate, called the applicable federal rate. Charge less, and the IRS may treat the forgone interest as a gift. The rule mainly bites on larger loans, not a small short-term IOU.
You can still make a low-interest or interest-free family loan. Just document the terms and understand the tax treatment first. Stating the rate in the agreement avoids confusion later. For a sizable loan, a quick word with a tax professional is worth the time.
IOU vs. promissory note vs. loan agreement
These three documents sit on a spectrum from casual to formal. An IOU simply acknowledges that a debt exists. It records the amount but rarely the terms. Use it only for small, low-risk sums.
A promissory note is the borrower's written promise to repay on set terms. It adds the interest rate, the schedule, and the payoff date. A full loan agreement goes further, with two-sided obligations, collateral, and default remedies. For anything beyond a small, casual loan, use a promissory note or a full agreement.
Repayment, late fees, and default
The repayment schedule is the heart of the agreement. Decide between fixed installments and a single lump sum by a set date. Spell out each amount and due date, so nothing is left to memory. A clear schedule prevents most disputes before they start.
Plan for the payment that arrives late or never comes. Set a late fee and a grace period, if any. Define default, and state what the lender can do when it happens. Remedies range from claiming collateral to suing for the unpaid balance.
Common mistakes to avoid
The most common mistake is charging interest above the state usury limit, which can wipe out the interest. Another is leaving the repayment schedule vague or open-ended. Skipping late-fee and default terms is just as risky, because a missed payment becomes a guessing game. Each of these gaps invites a dispute.
Informal family loans cause their own trouble. People skip the paperwork, then argue later over what was agreed. Forgetting to state whether early payoff is allowed creates friction at the end. For a larger loan, failing to add a promissory note or collateral leaves the lender exposed.