Loan Agreement: Putting Real Terms Around Money You Lend or Borrow
Money moves between people and businesses constantly on nothing more than a conversation. A parent funds a startup, a business owner lends working capital to a supplier, a friend covers an equipment purchase until the invoice clears. Everyone means well and nobody writes anything down, which works until repayment slows and two people discover they remembered the terms differently. A loan agreement is not a sign of distrust, it is the thing that lets the relationship survive the loan.
The short version
A loan agreement records the amount, the interest rate, the repayment schedule, what happens on a missed payment, and whether anything secures the debt. It is more detailed than a promissory note, which is essentially a one-sided promise to pay, and it is the right choice when there are real terms to negotiate rather than a simple IOU. A guided builder produces one tailored to your state in about fifteen minutes, and you get 10 percent off through our link.
Loan agreement or promissory note
Both are enforceable, and choosing between them is mostly about how much structure the arrangement needs. A promissory note is signed by the borrower alone and says, in effect, I owe you this and here is how I will repay it. It is short, clean, and perfect for a straightforward personal loan with a simple schedule.
A loan agreement is signed by both parties and covers obligations running in both directions. It handles things a note usually does not: conditions the lender must meet before disbursing funds, covenants the borrower agrees to while the loan is outstanding, collateral arrangements, and detailed default and remedy provisions. If the loan is business related, involves collateral, or has any conditions attached, the agreement is the right instrument. For a flat personal loan repaid in twelve equal installments, the note is simpler and entirely adequate.
Interest, and why zero percent is not automatically generous
Interest is where informal loans quietly create tax problems. In the United States, the IRS expects loans above a modest threshold to carry at least a minimum rate, published monthly as the applicable federal rate. Lend a substantial sum at zero percent and the difference between your rate and that minimum can be treated as imputed interest income to the lender, and potentially as a gift, which carries its own reporting consequences.
This catches family loans constantly, because charging a relative interest feels wrong and the tax code does not care how it feels. The practical fix is simple: set a rate at or slightly above the current applicable federal rate, state it clearly in the document, and the issue disappears. It is usually a small number, and it is far cheaper than an unexpected conversation with your accountant.
At the other end, every state caps interest through usury laws, and those caps vary widely. A rate that is perfectly legal in one state can be unenforceable in another, which is one of the concrete reasons to build the document against your actual jurisdiction rather than a generic template.
Secured or unsecured
An unsecured loan rests entirely on the borrower's promise. If they do not pay, your remedy is to sue, win a judgment, and then try to collect on it, which is a real process with real cost and no guarantee of recovery.
A secured loan attaches specific property as collateral, equipment, a vehicle, inventory, receivables. If the borrower defaults, you have a defined claim against that asset rather than a general claim against a person. Securing a loan changes the risk profile enough that it often justifies a lower interest rate, which is a fair trade both sides can appreciate. The agreement should describe the collateral precisely enough to identify it, a VIN, a serial number, a specific account, rather than a vague category.
Default provisions do the quiet work
The default section defines what counts as a breach and what the lender can do about it. Good ones distinguish between a payment being late and the loan being in default, usually through a grace period of ten or fifteen days, and they specify a late fee rather than leaving it to argument.
The provision worth understanding is acceleration. It says that on default, the entire remaining balance becomes due immediately rather than continuing on schedule. Without it, a lender chasing a borrower who has stopped paying has to pursue each missed installment separately, which is procedurally miserable. With it, one action covers the whole debt. Nearly every commercial loan includes acceleration, and personal loans should too.
What the document settles
- Exact principal, rate and payment schedule
- Whether payments hit interest or principal first
- Grace period and late fees in writing
- Acceleration on default
- Collateral described specifically enough to claim
- Prepayment allowed or penalized, stated clearly
Worth knowing
- Interest rates must respect your state's usury cap
- Zero-interest family loans can create tax exposure
- Securing collateral properly may need a separate filing
- Lending as a business can trigger licensing rules
Common questions
Do both parties have to sign?
For a loan agreement, yes, since both take on obligations. A promissory note only needs the borrower's signature, which is part of why it is simpler.
Should it be notarized?
Rarely required, but useful. Notarization removes any later argument about whether the signature is genuine, and it costs very little. For larger sums or loans involving family, it is worth the trip.
Can I charge a late fee?
Yes, provided it is stated in the agreement and is reasonable rather than punitive. Some states cap late fees explicitly, another reason to build the document against your jurisdiction.
What if the borrower wants to repay early?
Decide it up front. Some lenders allow prepayment freely, others include a prepayment penalty to protect expected interest. Either is fine, but silence leads to disagreement.
Bottom line
Every informal loan is a written agreement that has not happened yet, usually drafted from memory under pressure. Doing it properly at the start takes twenty minutes, keeps the tax treatment clean, and means that if repayment goes sideways you are holding a document rather than reconstructing a conversation.