Invoice Reminder Email Templates (7 Days Before, Due Date, Overdue) + Subject Lines

Getting paid on time shouldn’t require uncomfortable chasing. The best reminder emails feel routine, clear, and easy to act on—so clients can pay in seconds and move on.

Below you’ll find copy/paste templates (friendly → firm) for:

1. 7 days before due date
2. Due date
3. Overdue (3/7/14+ days)
4. Plus a bank of subject lines you can reuse.

Placeholders to replace:

[Client Name] [Invoice #] [Amount] [Due Date] [Invoice/Portal Link] [Payment Link] [Your Name] [Your Company]

Quick rules that make reminders work (without sounding awkward)

1. Keep it short (3–6 sentences).
2. Make the next step one click: “View invoice” + optional “Pay now.”
3. Always include: invoice #, amount, due date, link.
4. Use calm language: “Just a reminder” beats “You still haven’t paid.”
5. Escalate tone only after the due date, and do it politely and predictably.
6. 
   

Subject lines that get opened (use these as-is)

7 days before due date (gentle heads-up)

1. Reminder: Invoice [#] due on [Due Date]
2. Upcoming payment: Invoice [#] ([Amount])
3. Quick heads-up — invoice due next week
4. Invoice [#] due soon (link inside)
5. 
   

Due date (clear, neutral)

1. Due today: Invoice [#] ([Amount])
2. Invoice [#] is due today — quick link
3. Payment due today — Invoice [#]
4. Friendly reminder: Invoice [#] due today

Overdue (still professional)

1. Overdue: Invoice [#] — please confirm status
2. Past due: Invoice [#] ([Amount])
3. Following up: Invoice [#] is overdue
4. Action needed: Invoice [#] payment status
5. Final reminder: Invoice [#]

If you suspect it’s stuck in approvals (great for agencies)

1. Checking status: Invoice [#] in approvals?
2. Anything needed to process Invoice [#]?
3. Can you confirm payment date for Invoice [#]?

Template 1: 7 days before due date (friendly heads-up)

Subject: Reminder: Invoice [#] due on [Due Date]

Hi [Client Name],

Just a quick heads-up that Invoice [#] for [Amount] is due on [Due Date].

You can view/download it here: [Invoice/Portal Link]

If helpful, you can pay instantly here: [Payment Link]

Thanks!

[Your Name]

[Your Company]

Optional line (if you want to reduce back-and-forth):

If you need a PO, updated details, or a different format, reply here and I’ll send it over.

Template 2: Due date reminder (neutral, easy to act on)

Subject: Due today: Invoice [#] ([Amount])

Hi [Client Name],

A quick reminder that Invoice [#] for [Amount] is due today ([Due Date]).

View/download: [Invoice/Portal Link]

Pay now: [Payment Link]

Thank you,

[Your Name]

[Your Company]

Optional line (if you want confirmation):

If payment is already in progress, could you reply with the expected payment date?

Template 3: 3 days overdue (assume good intent, ask for status)

Subject: Past due: Invoice [#] ([Amount])

Hi [Client Name],

Following up on Invoice [#] for [Amount], which was due on [Due Date].

Here’s the invoice link: [Invoice/Portal Link]

Pay now: [Payment Link]

Could you confirm the payment status (or the expected payment date) when you get a moment?

Thanks,

[Your Name]

Template 4: 7 days overdue (slightly firmer, still respectful)

Subject: Overdue: Invoice [#] — please confirm status

Hi [Client Name],

Checking in again on Invoice [#] ([Amount]), now 7 days overdue (due [Due Date]).

Invoice: [Invoice/Portal Link]

Payment link: [Payment Link]

If this is waiting on internal approval, I’m happy to help—please tell me who I should coordinate with and the expected payment date.

Regards,

[Your Name]

[Your Company]

Template 5: 14 days overdue (firm + clear next step)

Subject: Action needed: Invoice [#] payment status

Hi [Client Name],

Invoice [#] for [Amount] is now 14 days past due (due [Due Date]).

Please either:

1. Pay here: [Payment Link] (or view invoice: [Invoice/Portal Link]), or
2. Reply with the expected payment date and any steps needed on your side.

Thanks,

[Your Name]

[Your Company]

Optional escalation line (use only if it matches your policy):

If we don’t hear back by [Date], we’ll pause new work until the account is up to date.

Template 6: “Final reminder” (last touch before you change terms)

Subject: Final reminder: Invoice [#]

Hi [Client Name],

This is a final reminder for Invoice [#] ([Amount]), due [Due Date].

Invoice link: [Invoice/Portal Link]

Pay now: [Payment Link]

If payment has already been sent, please reply with the payment date/reference so we can mark it correctly.

[Your Name]

Bonus: “Thanks — payment received” (closes the loop professionally)

Subject: Payment received — thank you

Hi [Client Name],

Thanks—payment for Invoice [#] has been received. Much appreciated.

For your records, here’s the invoice link: [Invoice/Portal Link]

Best,

[Your Name]

Common tweaks for specific situations

If they say “Resend the invoice”

Add this line anywhere:

1. “No problem—here it is again: [Invoice/Portal Link]”

If they ask for a PO / vendor setup

Add:

1. “Happy to help with vendor setup. Tell me what forms/details you need and I’ll send them today.”

If they prefer bank transfer instead of card

Add:

1. “If you’re paying by bank transfer, please use Invoice [#] as the payment reference.”

FAQ

How many reminders should I send?

A simple, effective sequence is: 7 days before, due date, 3 days overdue, 7 days overdue, 14 days overdue/final.

Should I CC someone else at the client?

Only after the due date—and only if it’s normal in your relationship (e.g., accounting@). Keep it professional.

What’s the best subject line?

Clear beats clever: “Reminder: Invoice [#] due on [Due Date]” and “Due today: Invoice [#] ([Amount])” consistently perform because the intent is obvious.

Want to make this fully “no-chasing”?

If you’re building a workflow where clients get a secure portal link (no login) and reminders stop automatically when marked paid, these templates become even more powerful, because they’re consistent, trackable, and effortless: CAN YOU PAY THAT