Demand Letter Guide for Contractors

What Is a Demand Letter?

A demand letter is a formal written notice sent to a client who owes you money. It clearly states the amount owed, the reason for the debt, and a deadline to pay before you escalate to legal action.

For contractors, a demand letter is typically the first formal step in the payment recovery process — before filing a mechanic's lien or taking the matter to small claims or civil court. Most payment disputes are resolved after a formal demand letter is received. Studies show that approximately 73% of payment disputes are settled at this stage.

Why Demand Letters Are Effective

• Creates a legal record — Documents your claim in writing with a clear date and amount
• Signals seriousness — Shows the client you are prepared to escalate
• Sets a deadline — Creates urgency and a clear timeline for resolution
• Costs nothing — No court fees, no attorney required for a basic demand letter
• Preserves relationships — More professional than immediate legal action

What to Include in a Contractor Demand Letter

1. Your full name and business name Include your contractor license number if applicable. This establishes your identity and professional standing.

2. Recipient's name and address Name the party who owes you — use the exact legal name from the contract. An incorrect name can be challenged.

3. Date of the letter This sets the starting point for the response deadline and establishes the record.

4. Description of work performed Be specific: project address, scope of work, start date, and completion date. Reference the contract or invoice number.

5. Amount owed and how it is calculated Break down the total: labor, materials, change orders, and any applicable penalties or interest from the contract.

6. Payment deadline Give a clear, specific date — "by April 15, 2026" not "within two weeks." Typically 10–14 days is standard.

7. Consequence of non-payment State what you will do if payment is not received — mechanic's lien filing, small claims court, or civil lawsuit. Be specific and follow through.

8. Your signature Sign in ink. Unsigned letters carry less legal weight and may be disregarded.

Tone and Delivery

Do:

• Keep it professional and factual
• Cite the specific contract or invoice number
• State a clear, specific deadline
• Send by certified mail with return receipt requested
• Keep a copy for your records
• Follow up if no response

Don't:

• Use threatening or aggressive language
• Make vague or exaggerated claims
• Demand more than what is contractually owed
• Send by email only — no guaranteed proof of receipt
• Wait too long — delay signals you are not serious

When to Send a Demand Letter

Timeline for typical payment disputes:

• Days 1–7 after invoice due date — Send a polite follow-up email or call. Most delays are resolved here.
• Days 14–30 — If still unpaid after follow-up, send a formal demand letter by certified mail.
• Days 30–45 — No response to demand letter. File a mechanic's lien (if within deadline) or file in small claims court.
• Days 45+ — Lien filed or legal action started. Most owners pay immediately after a lien is recorded.

Sending the Letter

Always send your demand letter by certified mail with return receipt — this gives you proof of delivery that may be required in court. You can also send a copy by email to create an additional timestamp, but certified mail is the primary delivery method.

Keep a copy of the letter, the certified mail receipt, and the return receipt card. These become evidence in any subsequent legal proceeding.

After the Demand Letter

If the client pays: Confirm receipt in writing and close the matter.

If the client ignores it: File a mechanic's lien immediately if you are still within the deadline. A lien on the property title is far more powerful than a letter.

If the client disputes the amount: Request their dispute in writing. If the dispute is unreasonable, proceed with the lien or court filing.

If the amount is under your state's small claims limit: Small claims court is fast, inexpensive, and attorney-optional. Most contractor payment cases under $10,000–$25,000 qualify.

Get Your Demand Letter Prepared

Kayron generates a professional demand letter based on your specific contract, work performed, amount owed, and state requirements — ready to send in minutes.