# Debit Memo: What It Is and When It's Used in Finance and Banking

Published: 2026-03-10
Author: Warren Team
URL: https://www.heywarren.com/blog/debit-memo

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A debit memo (or debit memorandum) is a document that notifies a party of an amount being charged to their account — either a bank notifying a depositor of a charge, a business notifying a customer of an additional charge, or a buyer notifying a seller that an amount has been deducted from what they owe. Unlike an invoice (which requests payment for goods or services delivered), a debit memo is issued after the original transaction to document an adjustment that increases what one party owes. Debit memos appear in banking (bank charges, insufficient funds fees), B2B vendor relationships (price corrections, short shipments), accounts payable, and intercompany accounting. Understanding when a debit memo is used, how it differs from a credit memo, and how to process one correctly prevents accounting errors and disputed payments.

## What Is a Debit Memo?

A debit memo communicates that a debit (charge) is being made to an account. The term is used in several distinct contexts:

![A debit memo is issued in three distinct contexts: by a bank to a depositor, by a buyer to a supplier, or by a seller to a customer.](data:image/svg+xml,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20viewBox%3D%220%200%20600%20211%22%20width%3D%22600%22%20height%3D%22211%22%20role%3D%22img%22%3E%3Ctitle%3EHierarchy%3C%2Ftitle%3E%3Crect%20width%3D%22100%25%22%20height%3D%22100%25%22%20fill%3D%22%23f8fafc%22%2F%3E%3Crect%20x%3D%22220%22%20y%3D%2220%22%20width%3D%22160%22%20height%3D%2258%22%20rx%3D%228%22%20fill%3D%22%232563eb%22%2F%3E%3Ctext%20x%3D%22300%22%20y%3D%2254%22%20text-anchor%3D%22middle%22%20font-family%3D%22system-ui%2C-apple-system%2Csans-serif%22%20font-size%3D%2214%22%20font-weight%3D%22700%22%20fill%3D%22white%22%3EDebit%20Memo%3C%2Ftext%3E%3Cpath%20d%3D%22M%20300%2078%20L%20300%20105.5%20L%20120%20105.5%20L%20120%20133%22%20stroke%3D%22%23cbd5e1%22%20stroke-width%3D%222%22%20fill%3D%22none%22%2F%3E%3Crect%20x%3D%2240%22%20y%3D%22133%22%20width%3D%22160%22%20height%3D%2258%22%20rx%3D%228%22%20fill%3D%22white%22%20stroke%3D%22%230891b2%22%20stroke-width%3D%222%22%2F%3E%3Ctext%20x%3D%22120%22%20y%3D%22158%22%20text-anchor%3D%22middle%22%20font-family%3D%22system-ui%2C-apple-system%2Csans-serif%22%20font-size%3D%2213%22%20font-weight%3D%22600%22%20fill%3D%22%230f172a%22%3EBank%20%E2%86%92%20Depositor%3C%2Ftext%3E%3Ctext%20x%3D%22120%22%20y%3D%22176%22%20text-anchor%3D%22middle%22%20font-family%3D%22system-ui%2C-apple-system%2Csans-serif%22%20font-size%3D%2210%22%20fill%3D%22%2364748b%22%3EFee%20or%20charge%20on%20account%3C%2Ftext%3E%3Cpath%20d%3D%22M%20300%2078%20L%20300%20105.5%20L%20300%20105.5%20L%20300%20133%22%20stroke%3D%22%23cbd5e1%22%20stroke-width%3D%222%22%20fill%3D%22none%22%2F%3E%3Crect%20x%3D%22220%22%20y%3D%22133%22%20width%3D%22160%22%20height%3D%2258%22%20rx%3D%228%22%20fill%3D%22white%22%20stroke%3D%22%230891b2%22%20stroke-width%3D%222%22%2F%3E%3Ctext%20x%3D%22300%22%20y%3D%22158%22%20text-anchor%3D%22middle%22%20font-family%3D%22system-ui%2C-apple-system%2Csans-serif%22%20font-size%3D%2213%22%20font-weight%3D%22600%22%20fill%3D%22%230f172a%22%3EBuyer%20%E2%86%92%20Supplier%3C%2Ftext%3E%3Ctext%20x%3D%22300%22%20y%3D%22176%22%20text-anchor%3D%22middle%22%20font-family%3D%22system-ui%2C-apple-system%2Csans-serif%22%20font-size%3D%2210%22%20fill%3D%22%2364748b%22%3EShort%20shipment%20or%20price%20e%E2%80%A6%3C%2Ftext%3E%3Cpath%20d%3D%22M%20300%2078%20L%20300%20105.5%20L%20480%20105.5%20L%20480%20133%22%20stroke%3D%22%23cbd5e1%22%20stroke-width%3D%222%22%20fill%3D%22none%22%2F%3E%3Crect%20x%3D%22400%22%20y%3D%22133%22%20width%3D%22160%22%20height%3D%2258%22%20rx%3D%228%22%20fill%3D%22white%22%20stroke%3D%22%230891b2%22%20stroke-width%3D%222%22%2F%3E%3Ctext%20x%3D%22480%22%20y%3D%22158%22%20text-anchor%3D%22middle%22%20font-family%3D%22system-ui%2C-apple-system%2Csans-serif%22%20font-size%3D%2213%22%20font-weight%3D%22600%22%20fill%3D%22%230f172a%22%3ESeller%20%E2%86%92%20Customer%3C%2Ftext%3E%3Ctext%20x%3D%22480%22%20y%3D%22176%22%20text-anchor%3D%22middle%22%20font-family%3D%22system-ui%2C-apple-system%2Csans-serif%22%20font-size%3D%2210%22%20fill%3D%22%2364748b%22%3EOmitted%20or%20extra%20charge%3C%2Ftext%3E%3C%2Fsvg%3E)

*A debit memo is issued in three distinct contexts: by a bank to a depositor, by a buyer to a supplier, or by a seller to a customer.*

**1. Bank debit memo (to depositor)**:
The bank issues a debit memo to notify you that a charge has been made to your account:
- Monthly service fee: "$12 service fee charged to your account"
- NSF (non-sufficient funds) fee: "$35 NSF fee debited to account"
- Wire transfer fee: "$25 outgoing wire fee"
- Loan payment auto-debit
In banking, the bank's debit memo is your debit — it reduces your account balance.

**2. Business-to-business debit memo (from buyer to supplier)**:
A buyer issues a debit memo to a supplier to document a reduction in the amount payable:
- The supplier delivered 100 units but only 92 were received — the buyer issues a debit memo for the 8 missing units
- The supplier charged the wrong price (too high) — the buyer debit memos the difference
- The supplier's goods were defective and returned — debit memo reduces the amount owed
In this context, the debit memo decreases the amount the buyer owes the supplier.

**3. Business-to-customer debit memo (from seller to customer)**:
A seller issues a debit memo to charge a customer for an additional amount not on the original invoice:
- Freight charges were omitted from the invoice
- Price adjustment due to material cost increase
- Additional services rendered after the original invoice

## Debit Memo vs. Credit Memo

| Document | Who Issues | Effect on Recipient | Common Reason |
|---|---|---|---|
| Invoice | Seller | Increases amount owed by buyer | Original sale of goods/services |
| Credit memo | Seller | Decreases amount owed by buyer | Return, discount, overcharge |
| Debit memo | Buyer (or bank) | Decreases amount owed by buyer to seller (OR reduces bank balance) | Short shipment, price discrepancy, bank fee |

**The confusion**: The bank's debit memo debits your account (reduces your balance), which feels like a "negative" to you. But in accounting, "debit" simply means an entry on the left side of the T-account — its effect depends on the type of account. A debit to your bank account (which is an asset) reduces it.

## How a Debit Memo Works in Accounts Payable

**Scenario**: A company receives an invoice from a supplier for $10,000 (for 500 widgets at $20 each). Upon inspection, only 475 widgets were received.

![How accounts payable issues a debit memo to a supplier after a short shipment, reducing the payment from the invoiced amount.](data:image/svg+xml,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20viewBox%3D%220%200%20875%20125%22%20width%3D%22875%22%20height%3D%22125%22%20role%3D%22img%22%3E%3Ctitle%3EFlow%20diagram%3C%2Ftitle%3E%3Crect%20width%3D%22100%25%22%20height%3D%22100%25%22%20fill%3D%22%23f8fafc%22%2F%3E%3Crect%20x%3D%2230%22%20y%3D%2225%22%20width%3D%22170%22%20height%3D%2275%22%20rx%3D%2210%22%20fill%3D%22white%22%20stroke%3D%22%232563eb%22%20stroke-width%3D%222%22%2F%3E%3Ctext%20x%3D%22115%22%20y%3D%2258.5%22%20text-anchor%3D%22middle%22%20font-family%3D%22system-ui%2C-apple-system%2Csans-serif%22%20font-size%3D%2214%22%20font-weight%3D%22600%22%20fill%3D%22%230f172a%22%3EInvoice%20Received%3C%2Ftext%3E%3Ctext%20x%3D%22115%22%20y%3D%2278.5%22%20text-anchor%3D%22middle%22%20font-family%3D%22system-ui%2C-apple-system%2Csans-serif%22%20font-size%3D%2211%22%20fill%3D%22%2364748b%22%3E%2410%2C000%3C%2Ftext%3E%3Cline%20x1%3D%22205%22%20y1%3D%2262.5%22%20x2%3D%22237%22%20y2%3D%2262.5%22%20stroke%3D%22%2364748b%22%20stroke-width%3D%222%22%2F%3E%3Cpolygon%20points%3D%22244%2C62.5%20235%2C57.5%20235%2C67.5%22%20fill%3D%22%2364748b%22%2F%3E%3Crect%20x%3D%22245%22%20y%3D%2225%22%20width%3D%22170%22%20height%3D%2275%22%20rx%3D%2210%22%20fill%3D%22white%22%20stroke%3D%22%232563eb%22%20stroke-width%3D%222%22%2F%3E%3Ctext%20x%3D%22330%22%20y%3D%2258.5%22%20text-anchor%3D%22middle%22%20font-family%3D%22system-ui%2C-apple-system%2Csans-serif%22%20font-size%3D%2214%22%20font-weight%3D%22600%22%20fill%3D%22%230f172a%22%3EShort%20Shipment%3C%2Ftext%3E%3Ctext%20x%3D%22330%22%20y%3D%2278.5%22%20text-anchor%3D%22middle%22%20font-family%3D%22system-ui%2C-apple-system%2Csans-serif%22%20font-size%3D%2211%22%20fill%3D%22%2364748b%22%3E25%20units%20missing%3C%2Ftext%3E%3Cline%20x1%3D%22420%22%20y1%3D%2262.5%22%20x2%3D%22452%22%20y2%3D%2262.5%22%20stroke%3D%22%2364748b%22%20stroke-width%3D%222%22%2F%3E%3Cpolygon%20points%3D%22459%2C62.5%20450%2C57.5%20450%2C67.5%22%20fill%3D%22%2364748b%22%2F%3E%3Crect%20x%3D%22460%22%20y%3D%2225%22%20width%3D%22170%22%20height%3D%2275%22%20rx%3D%2210%22%20fill%3D%22white%22%20stroke%3D%22%232563eb%22%20stroke-width%3D%222%22%2F%3E%3Ctext%20x%3D%22545%22%20y%3D%2258.5%22%20text-anchor%3D%22middle%22%20font-family%3D%22system-ui%2C-apple-system%2Csans-serif%22%20font-size%3D%2214%22%20font-weight%3D%22600%22%20fill%3D%22%230f172a%22%3EDebit%20Memo%20Issued%3C%2Ftext%3E%3Ctext%20x%3D%22545%22%20y%3D%2278.5%22%20text-anchor%3D%22middle%22%20font-family%3D%22system-ui%2C-apple-system%2Csans-serif%22%20font-size%3D%2211%22%20fill%3D%22%2364748b%22%3E%24500%20deduction%3C%2Ftext%3E%3Cline%20x1%3D%22635%22%20y1%3D%2262.5%22%20x2%3D%22667%22%20y2%3D%2262.5%22%20stroke%3D%22%2364748b%22%20stroke-width%3D%222%22%2F%3E%3Cpolygon%20points%3D%22674%2C62.5%20665%2C57.5%20665%2C67.5%22%20fill%3D%22%2364748b%22%2F%3E%3Crect%20x%3D%22675%22%20y%3D%2225%22%20width%3D%22170%22%20height%3D%2275%22%20rx%3D%2210%22%20fill%3D%22white%22%20stroke%3D%22%232563eb%22%20stroke-width%3D%222%22%2F%3E%3Ctext%20x%3D%22760%22%20y%3D%2258.5%22%20text-anchor%3D%22middle%22%20font-family%3D%22system-ui%2C-apple-system%2Csans-serif%22%20font-size%3D%2214%22%20font-weight%3D%22600%22%20fill%3D%22%230f172a%22%3ENet%20Payment%20Sent%3C%2Ftext%3E%3Ctext%20x%3D%22760%22%20y%3D%2278.5%22%20text-anchor%3D%22middle%22%20font-family%3D%22system-ui%2C-apple-system%2Csans-serif%22%20font-size%3D%2211%22%20fill%3D%22%2364748b%22%3E%249%2C500%3C%2Ftext%3E%3C%2Fsvg%3E)

*How accounts payable issues a debit memo to a supplier after a short shipment, reducing the payment from the invoiced amount.*

**Process**:
1. Receiving department documents the short shipment: 25 units × $20 = $500 discrepancy
2. Accounts payable issues a **debit memo** to the supplier for $500
3. The debit memo references the original invoice number and explains the discrepancy
4. AP pays the net amount: $10,000 − $500 = **$9,500**
5. The supplier's account in AP is credited with $9,500 (less than the original $10,000 invoice)

The debit memo creates a paper trail documenting why the supplier received less than invoiced — essential for audit and dispute resolution.

## Debit Memo vs. Credit Note in Practice

In international trade and B2B accounting:
- **Debit note/debit memo** (issued by buyer): "We are deducting $X from what we owe you because..."
- **Credit note/credit memo** (issued by seller): "We are reducing what you owe us by $X because..."

Economically, a buyer's debit memo and a seller's credit memo covering the same transaction achieve the same result — they are mirrors of each other. In practice, companies prefer to document adjustments from their own side (buyer issues debit memo; seller issues credit note) for their own accounting records.

## Debit Memo in Bank Reconciliation

When reconciling a bank statement to a company's general ledger:
- Debit memos on the bank statement (bank fees, charges) that haven't been recorded in the company's books must be added as journal entries
- A bank debit memo not in the company's books = reconciling item on the bank reconciliation

**Journal entry for a bank service fee debit memo**:
```
Dr. Bank Service Fee Expense    $12
    Cr. Cash (Checking Account)     $12
```

## Authoritative Sources

For deeper background and primary-source data on this topic, the following authoritative sources are useful starting points:

- [Federal Deposit Insurance Corporation](https://www.fdic.gov/)
- [Federal Reserve](https://www.federalreserve.gov/)

## Conclusion

A debit memo documents a charge or deduction — either from a bank to an account holder, from a buyer to a supplier (reducing payment), or from a seller to a customer (increasing charge). Understanding whether a debit memo is increasing or decreasing what you owe depends entirely on who issued it and in what context. In accounts payable, debit memos are essential tools for managing supplier pricing discrepancies, short shipments, and quality claims. For related accounting and payment concepts, see our guides on [accrue an expense](/blog/accrue-an-expense) and [wire and ACH difference](/blog/wire-and-ach-difference).

Warren at [heywarren.com](https://heywarren.com) helps accountants, business owners, and finance professionals understand accounting documents, manage vendor relationships, and maintain clean accounts payable processes.

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## Related Reading

**More from Warren**:
- [Accrue an Expense: How Accrual Accounting Works](/blog/accrue-an-expense)
- [Wire vs. ACH: What's the Difference and When to Use Each](/blog/wire-and-ach-difference)
- [Net Realizable Value: How to Calculate It and Why It Matters](/blog/net-realizable-value)

**Authoritative sources**:
- [FASB ASC 606 — Revenue Recognition](https://asc.fasb.org/606)
- [IRS — Business Accounting Methods](https://www.irs.gov/businesses/small-businesses-self-employed/accounting-periods-and-methods)
- [AICPA — Accounts Payable Best Practices](https://www.aicpa.org/)