Check the payment and the recipient first
Review your bank or payment provider before sending another email. A transfer may have arrived under a different reference. Confirm that the invoice reached the person who can process it, including the accounts payable contact where relevant. Use the original PDF, invoice number and due date so the recipient can find the record quickly.
Start before the deadline
A reminder two or three business days before the due date catches missing purchase orders, approval delays, and incorrect payment details early.
Follow up on a fixed schedule
Send on the due date, then around three, seven, and fourteen days late. Consistent timing removes the decision fatigue that causes follow-up to slip.
How to ask for payment professionally
Write a specific subject such as Payment update for invoice [number]. State the amount and due date, then ask one clear question: Could you confirm when payment is scheduled? Include the invoice and payment instructions. A neutral request gives the client something concrete to answer without accusing them of deliberately delaying payment.
Find the blocker before sending more reminders
Ask whether they need a purchase order, corrected billing address, supplier onboarding document or approval from another person. If they promise a payment date, record it and pause routine reminders until then. If the invoice is disputed or partly paid, pause and agree the remaining balance before continuing; repeating the original amount can create confusion.
Escalate facts, not emotion
Later messages can be firmer, but they should still state the invoice, amount, due date, and requested payment date. Reference contractual consequences only when they genuinely apply.
Close the loop after payment
Thank the client when you confirm receipt and update your tracker. In InvoicePing, mark the invoice paid to stop future reminders yourself; payments and email replies are not detected automatically. If the client has not paid after your routine sequence, review the history and choose the next personal follow-up rather than assuming automation will resolve every delay.