Start with the invoice number and what you're asking for
The first sentence should state exactly what you want: payment for a specific invoice, the amount due, and the due date. Not "I hope you can process this soon" or "When you get a chance, could you look at this?" but "Invoice 2847 for $3,200 is due on March 15."
This matters because the person reading your email may not be the person who approves payment. They might forward it to accounting, a manager, or a different department entirely. A clear opening line survives that handoff. It also gives the reader something to search for later—they can find your email by invoice number rather than digging through their inbox.
Include the invoice number in the subject line as well. "Invoice 2847 – Payment Due March 15" is better than "Payment Request" or "Invoice." The recipient can file it, search it, and reference it in conversation with their accounting team without opening the email.
Key Takeaways
- Open with the invoice number, amount, and due date in the first sentence so the reader knows when ready what you need.
- Attach the actual invoice document or include a link to it, and say where to send payment (bank account, check address, or payment portal).
- Keep the email short—three to five sentences is usually enough—because longer emails get forwarded to someone else and lose detail in the process.
- If payment is overdue, state how many days late it is and what happens next (late fee, service suspension, collection referral) without anger or apology.
- Send the email from a consistent address so the recipient can recognize it and file it with other payment communications from you.
Attach the invoice or make it straightforward to find
The email itself is not the invoice. Attach a PDF or include a direct link to the invoice on your website or portal. If you're using accounting software like QuickBooks, FreshBooks, or Wave, you can usually send the invoice directly from the software—it generates a professional PDF and tracks whether the recipient opened it.
If you're attaching a file, name it clearly: "Invoice-2847-March2024.pdf" rather than "Invoice.pdf" or "Document.pdf." The recipient may save dozens of invoices and need to find yours later.
If the invoice lives on a portal or website, include the full URL and say what login information they need. "You can view the invoice here: [link]. Use the same login as always" is clearer than "Check your account" and saves them a support call.
Tell them exactly where and how to pay
State the payment method and the destination. This might be a bank account (include routing number and account number, or a payment app like PayPal or Stripe), a mailing address for checks, or a link to an online payment portal. Do not assume they know where to send money.
If you accept multiple methods, list them in order of your preference. "Please send payment to [bank account details]. We also accept checks mailed to [address] or credit card payments through [portal link]." This speeds up payment because the recipient does not have to ask which method you prefer.
If there is a fee for certain payment methods (for example, credit card processing costs 2.9%), say so. "ACH transfer is free. Credit card payments incur a 2.9% processing fee." Transparency here prevents disputes later.
Reference the work or invoice date so they can match it to their records
Include the date the invoice was issued, the date the work was completed, or the project name—whatever helps the recipient connect your email to their own records. Their accounting system may file invoices by date or by project, and you want them to find it without asking you.
Example: "This invoice covers web design services completed February 28, 2024" or "Invoice for January consulting work, issued February 5." A single sentence is enough.
If this is a recurring invoice (monthly retainer, subscription, standing order), say so. "This is the March payment on our standing agreement" tells them this is expected and routine, not a surprise bill.
If payment is late, state the fact and the consequence
Do not apologize or soften the message. "This invoice is now 10 days overdue" is factual and direct. "I hate to bother you, but this is a bit late" is vague and makes the reader feel like you're uncertain about whether they should pay.
State what happens next if payment does not arrive. "A late fee of $50 will be added if payment is not received by March 22" or "We will suspend service on March 20 if payment has not been processed" gives them a clear important date and consequence. This is not a threat—it is information they need to make a decision.
If you are referring the account to a collection agency or attorney, say so. "If payment is not received by April 1, we will refer this account to our collection agency" is professional and factual. It also often prompts payment because the recipient knows the consequences are real.
Keep it short and use a professional tone
Three to five sentences is the target. The longer the email, the more likely it gets forwarded to someone else, and details get lost in the process. Stick to the facts: invoice number, amount, due date, where to pay, and what happens if they do not pay.
Use a neutral, professional tone. Not angry ("I cannot believe this is still unpaid"), not overly friendly ("Hope you're having a great day!"), not apologetic ("Sorry to bother you again"). The tone should match a business letter: clear, direct, and respectful of the reader's time.
Sign with your name, title, and contact information so they know who to reach if they have questions. If you are sending this on behalf of a company, include the company name and a phone number or email address where they can reach someone in accounting or billing.
Send it from a consistent email address
Use the same email address every time you send a payment request. If you send from "billing@company.com" one month and your personal email the next, the recipient may not recognize it as a legitimate invoice. They might file it in the wrong folder, mark it as spam, or ask you to resend it from the "official" address.
If you are an individual freelancer or contractor, use a professional email address (your name or business name at a domain you own, not a Gmail or Yahoo account). This signals that the request is legitimate and helps the recipient take it seriously.
Set up an email signature that includes your business name, phone number, and website. This gives the recipient a way to verify who you are and contact you if there are questions about the invoice.
Frequently Asked Questions
How long should I wait before sending a payment reminder?
Send the first reminder three to five days after the due date. Many invoices are paid late straightforward because they were overlooked, and a quick reminder often resolves it. If payment still has not arrived after another week, send a second email stating the number of days overdue and any consequences.
Should I include a late fee in the original invoice email?
Yes. State the late fee policy in the original invoice so the recipient knows what to expect. "A late fee of $50 will be charged if payment is not received by [date]" is clearer than adding the fee later and then explaining it. This prevents disputes and shows you are serious about the due date.
What if the recipient says they never received the invoice?
Resend it when ready from your email account, and ask them to confirm receipt. If they use a corporate email system, your message may have been caught by a spam filter. Ask them what email address invoices should go to, and whether there is a specific person in accounting who handles payments. This information helps future invoices reach the right person.
Can I send a payment request through text or when ready message?
Only if that is how you normally communicate with the recipient and they have agreed to it. Email creates a record that both of you can reference later, and it is the standard for business payments. Text and when ready messages are straightforward to miss or forget. Use email for the official request, even if you follow up with a text.
What should I do if someone keeps paying late?
After the second late payment, contact them directly by phone or video call to discuss payment terms. Ask whether the due date is realistic for their cash flow, whether they need an invoice earlier in the month, or whether there is a problem with the invoice itself. You may need to adjust the due date, require payment upfront, or stop working with them if the pattern continues.