1. What “writing off” a small balance means

Writing off a small balance usually means:

• Clearing a small underpayment or overpayment on a customer or supplier account (for example, a few cents or a small rounding difference).
• Posting the difference to a suitable expense or income nominal code (such as “Small Balance Write‑Off” or “Rounding Differences”).

This keeps your ledgers tidy and prevents minor amounts from remaining outstanding indefinitely.

The choice of nominal code and whether it is treated as an expense or income should be confirmed with your accountant, as it affects your accounts and tax.

2. Typical situations where you write off small balances

You might need to write off small balances when:

• A customer has underpaid or overpaid an invoice by a small amount, and you don’t intend to chase or refund it.
• A supplier invoice has a tiny difference due to rounding or currency conversion.
• Bank charges or rounding differences leave a small residual balance after matching payments and receipts.

3. General approach to writing off a small customer balance

For a customer:

1. Identify the small balance
   • Open the customer account and find the invoice or account line with a small remaining balance (positive or negative).
2. Decide the write‑off nominal code
   • Use or create a nominal code such as “Small Balance Write‑Off” or “Rounding Differences”.
   • Confirm with your accountant:
     • Which nominal code to use.
     • Whether it should be treated as an expense or income.
3. Post a correcting transaction
   • Options typically include:
     • A credit note (for small overpayments or to reduce an outstanding invoice).
     • A journal (to move the small balance from the customer control account to the write‑off nominal code).
   • The amount of the correction should equal the small balance you want to clear.
4. Allocate the correction
   • If you use a credit note, allocate it against the relevant invoice so the invoice is fully cleared.
   • If you use a journal, ensure it correctly adjusts the customer balance to zero.

4. General approach to writing off a small supplier balance

For a supplier:

1. Identify the small balance
   • Open the supplier account and find the invoice or account line with a small remaining balance.
2. Confirm the write‑off nominal code
   • As with customers, use a suitable nominal code for small write‑offs or rounding differences, agreed with your accountant.
3. Post a correcting transaction
   • Options typically include:
     • A credit note (for small underpayments or overpayments).
     • A journal to move the small balance from the supplier control account to the write‑off nominal code.
4. Allocate the correction
   • Allocate the credit note or ensure the journal clears the supplier balance so the invoice shows as fully settled.

5. Practical tips

• Set a sensible threshold
  • Agree with your accountant what counts as a “small” balance (for example, a few cents or a small fixed amount).
• Use a dedicated nominal code
  • Having a specific nominal code for small write‑offs or rounding differences makes it easier to review and explain these amounts at year‑end.
• Avoid frequent manual write‑offs for larger amounts
  • Larger differences should be investigated and corrected properly, not simply written off.
• Document the reason
  • Add a note or reference (e.g., “Write‑off small balance on invoice 12345”) so it’s clear why the adjustment was made.

6. Reminder

Writing off small balances is an accounting decision:

• It affects your reported income or expenses.
• It should be done in line with your accounting policies and materiality thresholds.

Always check with your accountant:

• Which nominal code to use.
• What size of balance can be written off.
• Whether any specific documentation is required for audit or tax purposes.