A handshake loan can feel simple until two people remember the deal differently. A sample loan contract letter records a private personal loan between friends or family and states the amount, the plan, and what a late payment means.

Do you need a three-page contract for a couple thousand dollars? Not always.

A short signed letter with the real terms beats a messy text thread. It still isn't legal advice. This is written for U.S. readers. State contract law controls the private deal, and federal tax rules can still apply when the lender is a relative.

What a loan contract letter can do

A signed letter can help show the money was a loan rather than a gift, and it gives both of you a single place to look when memories drift. It won't guarantee repayment or override IRS rules.

Promissory note or fuller loan letter?

People use both names for kitchen-table paperwork. A promissory note is mainly the borrower's written promise to pay a stated sum, by a date or in installments. It can stay quite short.

A loan contract letter usually adds the working details: payment method, interest or no interest, early payoff, and what a missed payment means. The extra lines prevent later fights.

A one-page note can be enough for a small, no-interest loan you both already understand. Longer timelines need more detail because people forget.

What to write down

Use facts you already agreed on. Don't invent harsh terms after the money has moved.

1. Legal names and mailing addresses for lender and borrower.
2. Principal in dollars.
3. The interest rate, or a clear statement that no interest will be charged.
4. Payment amount, due dates, and method you can both prove, such as a bank transfer or a check.
5. The date the loan must be paid in full.
6. What both of you mean by a late or missed payment.
7. Whether the borrower can prepay without a fee.
8. The state whose law you want to govern the letter.
9. Signature and date lines for both parties.

Keep your own copy, plus the bank record that shows the funds actually moved. That transfer proof often matters as much as the signatures.

A witness line is optional. It does not replace reading the terms.

Interest-free loans and federal tax rules

People treat zero interest as the kind choice. Turns out federal tax law can still recharacterize some below-market loans.

Federal law can treat forgone interest on certain below-market loans as transferred between the parties, and it may treat a covered loan as having original issue discount. Timing rules sit in the statute. Read 26 U.S.C. Section 7872 if the rate is below market.

A blank form can't apply that statute to your facts. If the balance is large, the stated rate is zero, or a family business sits in the middle, get tax help before anyone signs. A template will not settle taxes.

People skip this part because it feels cold to charge a sibling any interest at all, and then they type 0% into a form they found online, print two copies, sign them on the kitchen counter, and figure the paperwork is finished when the tax question is actually a separate problem from whether the letter looks official.

If you never expect the money back, you may be making a gift. Large gifts can create IRS filing work.

Use current IRS gift-tax materials for the year of the transfer. Don't copy a dollar threshold from an old article.

Informal loans compared with a bank personal loan

A bank or credit union personal loan usually means underwriting, a set rate, fees, and a collections process if you default. A friends-and-family loan usually moves faster. It's also easier to treat casually until it isn't.

You won't get a bank-style disclosure packet from your cousin. Payments often never appear on a credit file, so this path usually won't rebuild a score the way a reported installment loan might. A missed payment gets personal quickly.

Sample loan contract letter

Copy the layout below into a document, replace the brackets, and delete any line that isn't true for your deal. This is a starting outline, not a lawyer-reviewed form.

[Lender full name]
[Street address]
[City, State ZIP]
[Date]

[Borrower full name]
[Street address]
[City, State ZIP]

Subject: Personal loan letter

This letter records a personal loan from [Lender name] (Lender) to [Borrower name] (Borrower).

1. Principal. Lender is lending Borrower $[amount] (the Loan).

2. Disbursement. Lender will provide the Loan on [date] by [bank transfer / check / other].

3. Repayment. Borrower will repay the Loan in [weekly / monthly] payments of $[amount], starting [date], until paid in full on or before [end date]. Payments will be made by [method].

4. Interest. [No interest will be charged. / Interest will be charged at [rate] percent per year on the unpaid balance, calculated as [simple / other].]

5. Prepayment. Borrower may pay extra or pay in full early without a prepayment fee.

6. Late payment. If a payment is more than [number] days late, the parties will [state what you actually agreed].

7. Records. Each party will keep a copy of this letter and a simple payment log.

8. Governing law. The parties intend the laws of the State of [State] to govern this letter.

Lender signature: ________________________ Date: __________

Borrower signature: ______________________ Date: __________

Leave out threats you can't carry out, including credit-bureau reporting if you aren't a furnisher. A late fee belongs in the letter only if you both agreed to the number, not because another template had one. Put in the number you agreed.

If you charge interest, your state may cap the rate. Check that before you pick a number.

If the borrower stops paying

Thing is, the letter is evidence. It does not collect the money.

Send a calm written reminder that cites the letter and the missed date, then update the payment log. If that fails and the amount is modest, people often look at small-claims court. Filing limits, venue, and forms come from that court, not from a website template.

Skip fake legal letterhead, public shaming, and threats of arrest. Those moves can create new problems and they rarely get a check in the mail.

Records worth keeping

Hold onto these:

• The signed letter
• Proof the money left the lender's account
• Each repayment, such as statements or transfer receipts
• Any later change you both signed

If you change the schedule, write the new dates down. Both of you should sign the change. An oral "skip this month" deal is how these files fall apart.

Write the terms while they're still fresh, confirm the transfer, and get tax advice before anyone signs if the loan is large or interest-free. To be honest, the paper trail matters more.