LegalFree tool
Demand Letter Generator for Money Owed
A firm demand letter for money you're owed: every amount itemized against your documents, a deadline to pay, and the step you'll take next.
Free to start · Opens in your River workspace, ready to edit and share
How to write a demand letter for money owed
A demand letter for money owed is a formal written request for payment that you send before going to court. A good one names the agreement, quotes the term that made the money due, and lists each amount with the document behind it. It gives one total, a firm date and a way to pay, then says calmly what you will do if the date passes.
Write it for two readers. The person who owes you should see that paying is the easiest way out. A judge who reads it later should see someone reasonable who gave fair warning.
Check the rules before you write
A demand letter comes after polite reminders have failed. If you haven't chased the money yet, start with a gentler late payment reminder.
Then check whether a court, a statute or your own contract says how you must ask. Some set a waiting period before you can sue, and some say what the letter must contain.
Rules that make you ask before you sue: some examples
| Where it applies | Source | What you must do |
|---|---|---|
| California small claims | California courts' self-help guide1 | Ask for the money before you file, by letter, email or in person |
| Massachusetts consumer protection claims | Chapter 93A, section 92 | Mail or deliver a written demand at least 30 days before suing, describing the unfair practice and your injury |
| Texas consumer protection claims | Deceptive Trade Practices Act, section 17.5053 | Give written notice at least 60 days before suing for damages, with your specific complaint and the amount of your damages and expenses |
| Any contract with a notice clause | Your contract | Give notice the way the clause says, to the address it names, and allow any time it gives to fix the problem |
These are examples, not a full list. Other states and claim types have their own rules.
Skipping a required notice can stall your case. If a Texas consumer sues under that law without notice, the other side can ask the court to pause the case3 until 60 days after proper notice is served.
Add up exactly what you're owed
Gather the paper trail first: the quote or contract, invoices, change orders, receipts, records of what they paid, and any message where they promised to pay. Then build the total line by line. Start from the agreed price, add approved extras, and subtract every payment and credit.
Add interest only if your contract or a law gives you the right to it. If your contract sets a rate, apply it from the date the contract says and show the calculation. If it doesn't, check your state's law. In Texas, a creditor who never agreed on interest may charge 6% a year on the principal, starting on the 30th day after the due date4.
Leave out legal fees, collection costs and penalties unless the contract or a statute provides for them. One padded line makes the reader doubt every other number, and a judge can refuse it anyway.
Write the demand letter in this order
Use plain business format and keep it to one or two pages. Each part answers a question the reader will have, in the order they'll have it.
Heading and subject
Your name and address, the date and how you're sending it, then their name and address. Add a subject line with the total, such as "Re: Unpaid balance of $6,400 on Invoice 1042."
The agreement
What was agreed and when, with the term that made payment due quoted word for word.
What happened
Dated facts only: the work delivered, the invoice sent, your reminders and any partial payments.
The amount
A short itemized list that ends in one total, each line matching an enclosed document.
The demand
The exact amount, a calendar date and how to pay, such as a bank transfer or a check mailed to your address.
What happens next
The civil step you'll take if the date passes, then your contact details, signature and a list of enclosures.
Re: Unpaid balance of $6,400 on Invoice 1042
On April 6, you signed our quote to build and install shelving at Harbor Street Cafe for $8,400 and paid a $2,000 deposit. We finished the installation on May 28 and sent Invoice 1042 on June 3. The quote says: "Balance due within 30 days of invoice," so payment was due by July 3.
We sent reminders on July 10 and July 24 and have had no reply.
Contract price (signed quote, April 6): $8,400.00. Less deposit received April 6: $2,000.00. Balance owed: $6,400.00.
Please pay $6,400.00 by August 15 by bank transfer to the account shown on Invoice 1042. If we have not received payment by then, we will file a claim in small claims court.
Enclosed: the signed quote, Invoice 1042 and our reminder emails.
- Quotes the term. The reader sees exactly why the money is due, and when.
- Shows the math. Each line matches an enclosed document, and the total is one number.
- Adds no interest. The quote sets no interest rate, so the letter asks for the balance alone.
- Makes paying easy. One amount, one date and one way to pay.
Keep it firm, factual and civil
Stick to facts your documents prove, leave out insults and history that doesn't matter, and don't admit anything you wouldn't want read back to you in court. Calm and specific reads as confident.
Threaten only what you'll actually do, and only civil steps: a small claims filing, handing it to a lawyer, or a lawsuit. An empty threat costs you credibility the day the deadline passes. If you'd accept less to be done with it, you can offer a modest discount for payment by the date.
Never threaten criminal charges
Don't tie payment to a police report or to shaming them in public. Florida, for one, makes it a second-degree felony to maliciously threaten, in writing or aloud, to accuse someone of a crime or expose them to disgrace to extort money5.
Send it, then follow through
Before you send it
- Every amount matches a document you enclose
- Interest appears only where a contract or law allows it
- Any notice rule for your state and claim is met
- One deadline, one way to pay, one next step
- No insults, guesses or threats you won't carry out
- You have kept a copy of everything
Give them 10 to 14 days from when the letter will arrive, unless a notice law sets a longer wait. Send it by certified mail with a return receipt so you can prove delivery, and email a copy the same day.
If the date passes, do what you said. When the amount fits your state's small claims limit, that usually means filing there. California's general limits are $12,500 for individuals and $6,250 for businesses6.
Watch the deadline for suing, too. In California it is generally four years after a written agreement is broken and two years after a spoken one6. The same guide says not to wait if a filing deadline is coming up soon1.
If they offer to pay part, or in installments, get the deal in writing before you drop the claim. A settlement agreement and release records what they'll pay and when, and what you give up in return.
When to involve a lawyer
Talk to a lawyer before you send it if the amount is above your small claims limit or the other side has a lawyer. Do the same if you expect a countersuit or you're collecting a debt owed to someone else. This guide is general information for US readers, not legal advice.
Prefer to fill one in yourself? The demand letter template for unpaid invoices has the letter, a dated contact log and an interest calculation sheet, free to download.
How it works
Start by describing what happened in your own words, and attach the quote, invoice or emails if you have them. River adds up what you're owed line by line from those documents, checks whether your claim or state needs a formal notice, and looks up your state's small claims limit. Then it writes the letter in your workspace and marks anything it couldn't confirm. River drafts the letter but never sends it for you.
Describe what happened
Say what was agreed, what went wrong and what you're owed. Attach the quote, invoice or emails.
River checks the math
It ties each amount to a document and looks up the notice rules and small claims limit for your state.
Get your letter
A finished letter in your workspace, with the itemized total, a deadline and a list to confirm before sending.
Edit and follow up
Change anything, or ask River for a final notice, a payment plan offer or a summary for small claims.
What you get
- A finished business letter, usually one to two pages, with a Re: line naming the total owed
- An itemized table of what you're owed, each line tied to a quote, invoice, receipt or contract term
- Interest or late fees only where your contract or a law allows them, with the calculation shown
- A clear demand: the amount, a date and how to pay, plus the civil step you'll take next
- A check for any notice rule your claim or state requires, with sources, plus your small claims limit
- A separate "Before you send this" list: facts to confirm, assumptions made and how to prove delivery
Common questions
What is a demand letter for money owed?
A demand letter is the formal letter you send when reminders haven't worked: a request to pay a specific amount by a set date, before you go to court. It explains the agreement, lists what's owed and says what you'll do next. If you need someone to stop doing something instead, you want a cease and desist letter.
Do I have to send a demand letter before suing?
Sometimes it's required, and it's wise either way. California's small claims courts expect you to ask for payment before you file. Consumer protection laws require written notice before certain suits, 30 days ahead in Massachusetts and 60 in Texas. Contracts can add notice steps of their own. Even where nothing requires one, a letter gives the other side a last clear chance to pay.
How long should I give them to pay?
Give them until a specific calendar date, about 10 to 14 days after the letter should arrive. That's long enough to arrange payment and short enough to show you mean it. If a law sets a waiting period for your claim, such as 30 days for Massachusetts consumer protection claims, allow at least that long. Then act on the date you set, or your next letter carries less weight.
Should a lawyer send my demand letter?
You usually don't need a lawyer if the amount fits within your state's small claims limit and the facts are simple. One is worth paying when the sum is large, the contract is complicated, the other side already has counsel, or you expect a countersuit. A letter on a law firm's letterhead also tells the reader that a lawsuit is a real possibility.
What if they ignore my demand letter?
Take the step your letter named, usually a small claims filing if the amount is within your state's limit. Bring the letter, proof that it was delivered and the documents behind each amount to the hearing. If the debt is over the limit or the facts are disputed, talk to a lawyer about a regular lawsuit before your filing deadline passes.
How do I write a demand letter with River?
Describe what happened and what you're owed in the box at the top of this page, and attach the quote, invoice or emails if you have them. River adds up the amount from your documents and checks the notice rules for your state. It writes the letter into your free River workspace, where you can edit it before you send it.
Is the demand letter generator free?
Yes, it is free to start. Your demand letter opens in a River workspace, where you can edit it, share it or ask River to change it. Paid plans add more AI use and access to the most advanced models.
Sources
California Courts. “Ask for the money.” selfhelp.courts.ca.gov (opens in a new tab)
Massachusetts Legislature. “General Law - Part I, Title XV, Chapter 93A, Section 9.” malegislature.gov (opens in a new tab)
Texas Legislature. “Business and Commerce Code Chapter 17. Deceptive Trade Practices.” statutes.capitol.texas.gov (opens in a new tab)
Texas Legislature. “Finance Code Chapter 302. Interest Rates.” statutes.capitol.texas.gov (opens in a new tab)
The Florida Senate. “2026 Florida Statutes 836.05: Threats; extortion.” flsenate.gov (opens in a new tab)
California Courts. “Before you start a small claims case.” selfhelp.courts.ca.gov (opens in a new tab)
Built by
Chandler Supple
Co-founder & CEO, River
Chandler has spent the last six years working in AI, building tools for millions of users and Fortune 100 companies. In 2025, he co-founded River to build a new kind of operating system for AI agents.