Start with a clear subject line and state the amount upfront
Your subject line should name the invoice number or project, and the amount owed. Use something like "Payment Request: Invoice #2847 – $1,500" or "Outstanding Balance Due – Project Name." A reader should know what the email is about before opening it.
In the first sentence, state the amount, what it covers, and when payment is due. Do not bury the number in a paragraph. Example: "This email requests payment of $3,200 for web design services completed on March 15, 2024. Payment is due by April 15, 2024."
If this is a follow-up to an earlier request, say so immediately: "This is a second request for payment of $1,800, originally due on February 28." A recipient who has already ignored one request needs to know this is not the first time you are asking.
Key Takeaways
- Put the invoice number, amount, and due date in the subject line or opening sentence so the reader knows what you need without reading further.
- Attach or link to the original invoice, contract, or statement showing what the payment covers and when it was due.
- Use a neutral, factual tone—do not apologize for asking or make excuses for the payer's delay.
- Specify exactly how to pay: the bank account, payment app, mailing address, or online portal, with any reference numbers the payer needs to include.
- If payment is overdue, state the number of days late and ask for payment within a specific timeframe (usually 5 to 10 business days).
Attach the invoice and reference the original agreement
Every payment request email must include or link to the original invoice, receipt, contract, or statement. Do not ask someone to pay without showing them what they are paying for. If the invoice was sent weeks or months ago, the payer may have lost it or forgotten the details.
Reference the date the invoice was issued and the date payment was due. If you have a contract or purchase order, mention it by name or number: "As outlined in the Service Agreement dated January 10, 2024" or "Per Purchase Order #5521." This ties the payment request to a document the payer already agreed to.
If the invoice has changed since the original—because of a partial payment, a credit, or an adjustment—explain the change clearly. Example: "The original invoice was $5,000. You paid $2,000 on March 1. The remaining balance due is $3,000."
Explain what the payment covers in one or two sentences
Do not assume the payer remembers what they hired you for or what they bought. Remind them in plain language: "This payment covers four hours of consulting on your website redesign" or "Invoice for 50 units of Product X, shipped February 20."
If the payment covers multiple items or dates, list them briefly. Use a bullet point or a short table if there are more than two line items. Keep it factual and specific—the payer should be able to match this description to their own records or budget.
State the payment method and any required reference numbers
Tell the payer exactly how to send money. Do not assume they know. Include all of these details:
- Bank account number and routing number (if paying by ACH or wire transfer)
- Mailing address (if paying by check)
- Payment app name and username (if paying by Venmo, PayPal, or similar)
- Online portal link or login instructions (if paying through your website or accounting software)
- Credit card processor or payment gateway (if that is an option)
Include any reference number the payer must write on the check, include in the wire transfer memo, or enter in the payment app. This might be an invoice number, project code, or account number. Example: "Please include Invoice #2847 in the wire transfer memo so we can match the payment to your account."
If you accept multiple payment methods, list them all and let the payer choose. Some people have cash flow reasons for preferring one method over another.
Use a neutral tone and avoid common mistakes
Do not apologize for asking for payment you are owed. Do not write "I hope this is not a bother" or "Sorry to follow up." You completed work or delivered goods; the payer agreed to pay. A payment request is a normal business communication, not an imposition.
Do not make excuses for the payer's delay. Do not write "I understand you are busy" or "I know cash flow is tight." These phrases soften your request and signal that you are willing to wait longer. If payment is overdue, state that fact plainly: "This invoice is now 30 days overdue."
Do not use aggressive or threatening language. Do not write "You must pay immediately" or "Legal action will follow." If you need to escalate, do that in a separate communication after the payment request has been ignored. In the initial request, be direct but professional.
Set a clear deadline and say what happens next
State the due date in the email. If payment is already overdue, give a new deadline—usually 5 to 10 business days from the date of your email. Example: "Payment is due by April 20, 2024" or "Please remit payment within 10 business days of this email."
If this is a follow-up to an earlier request, mention that: "This is a second request. Payment was originally due on March 15. Please send payment by April 5." A payer who has already ignored one deadline needs to know you are serious about the second one.
Optionally, state what happens if payment is not received by the deadline. This might be a late fee (if your contract allows it), a suspension of services, or a referral to a collection agency. Do not threaten; simply state the fact. Example: "If payment is not received by April 20, a late fee of 1.5% per month will be added to the balance, as outlined in our Service Agreement."
Keep the email short and scannable
A payment request email should be no longer than 200 words. Use short paragraphs and white space. A busy payer should be able to scan the email in 30 seconds and know exactly what you need, how much, when, and how to pay.
Put the most important information first: amount, due date, and payment method. Put supporting details (invoice number, what the payment covers) second. Put optional information (late fees, next steps) last.
Do not include a long explanation of why you are asking for payment or a history of your relationship with the payer. Save that for a conversation if the payer disputes the invoice.
Frequently Asked Questions
Should I send a payment request email or just resend the original invoice?
Resend the invoice if payment is not yet due. Send a payment request email if the due date has passed or is approaching. A payment request email is more direct and includes a deadline, which prompts action. An invoice is a record of what was sold; a payment request is a call to action.
What if the payer says they already paid?
Ask them for proof: the date they sent payment, the payment method, and any confirmation number or receipt. Check your bank account, payment app, and accounting software to see if the payment arrived. If it did, apologize and confirm receipt. If it did not, ask them to resend or provide documentation so you can investigate.
Can I charge a late fee if payment is overdue?
Only if your contract or invoice states that you can. Late fees are usually a percentage of the amount owed (1% to 2% per month) or a flat amount. State the fee in the payment request email so the payer knows it will be added if they do not pay by the deadline.
How many times should I send a payment request before giving up?
Send a payment request email when the invoice is due, then again 7 to 10 days later if payment has not arrived. After the second request, contact the payer by phone or in person if possible. If they still do not pay after 30 days, consider referring the debt to a collection agency or pursuing legal action, depending on the amount and your contract.
Should I include a personal note or keep it purely business?
Keep it business. A payment request is not the place for personal conversation. If you have an ongoing relationship with the payer, a brief friendly opening ("Hi Sarah, I hope you are well") is fine, but move quickly to the amount and due date. Save relationship-building for other communications.