Undercharge Debit Note Template
Correct a billing error — charge the undercharged difference, referenced, in a professional PDF.
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Debit Note
How to write a undercharge debit note
An undercharge debit note fixes an invoice where you billed too little — a wrong price, a missed line or an under-counted quantity. Instead of reissuing the invoice, you charge just the difference so the customer’s balance is correct and the trail is clear.
This template opens with itemised lines. Reference the invoice, charge the undercharged amount only, explain the correction, and download a PDF debit note.
What to include
- “Debit Note” label with its own number and date
- A reference to the under-billed invoice
- The undercharged amount only, with tax
- A clear explanation of the error
- The corrected total now due
Note: Corrects an under-billing · references the original invoice.
Frequently asked questions
How do I correct an invoice I undercharged?
Issue a debit note that references the invoice and charges only the undercharged difference, with tax added proportionally. The original invoice stands and the debit note brings the balance to the correct figure.
Should I reissue the invoice instead?
No — leave the issued invoice as it is and post a debit note for the difference. That keeps a clean audit trail; reissuing or editing a sent invoice does not.
Is the undercharge debit note template free?
Yes — create and download it with no account.
Is this debit note generator free?
Yes — CalculatorAI's debit note generator is completely free. Create, customise and download as many professional PDF debit notes as you want, with no signup, no watermark and no trial limit. A free account adds saved clients, history and the Invoices Tracker.
What is the difference between a debit note and a credit note?
A debit note increases the amount owed on an invoice already issued — for an undercharge, additional charges or interest. A credit note does the opposite: it reduces or cancels what is owed. Buyers also raise debit notes to notify a supplier of a return or a claim.
Keep debit notes and invoices in one place
A debit note increases what a customer owes on an invoice already sent. The Invoices Tracker keeps your invoices, debit notes and what each client still owes together — so your books always reconcile.
Open the Invoices Tracker