An overpayment happens when a customer pays more than they owe, whether by paying an invoice twice, rounding up or paying the wrong amount. The extra money is not income. It is a credit the customer can use. You can apply it to an open or future invoice, or refund it. QuickBooks Online says you can apply the credit to an invoice, give a refund, or enter the extra as a tip. If nothing is open to apply it to, the customer's balance shows as negative until the credit is used or refunded.
What is an overpayment?
An overpayment is any amount a customer pays beyond what they owe. Common causes:
- Paying the same invoice twice, once by card and once by bank transfer
- Paying an invoice that a credit memo had already reduced
- Rounding up, or typing the wrong amount
- Paying ahead without saying which invoice it is for
Is an overpayment income?
No. You haven't earned it, so it stays the customer's money until it is applied to something they owe or returned. On your books it is a credit on the customer's account. A customer with an unapplied credit shows a negative balance in receivables.
A worked example
A customer on a $14,800 plan owes a $1,108.33 payment and sends $1,200.
- Paid: $1,200.00
- Due: $1,108.33
- Overpaid: $1,200.00 − $1,108.33 = $91.67
The $91.67 can come off the next payment, which would then be $1,108.33 − $91.67 = $1,016.66. Or it can be refunded. Ask the customer which they prefer and confirm it in writing.
What are your options?
QuickBooks Online's support article lists three: "apply the credit to an invoice, give a refund, or enter the extra payment as a tip."
| Option | When it fits |
|---|---|
| Apply to an open invoice | The customer has another bill open now |
| Keep as a credit | More invoices are coming, as on a payment plan |
| Refund | The account is paid off, or the customer asks for it back |
| Record as a tip | The customer meant the extra as a tip |
How does QuickBooks Online handle it?
From QuickBooks Online's support articles:
- Receive payment. You record the full amount received against the customer. When the amount received is more than the invoices you apply it to, "any surplus between the amount to apply and amount received shows as an amount to credit."
- Applying the credit. You apply it later through Receive payment, by selecting the customer, the credit and the invoice.
- Auto-apply. With Automatically apply credits turned on, QuickBooks applies credits to the oldest unpaid invoice first.
- Nothing open. If there are no unpaid invoices, the credit stays unapplied and the customer's balance is negative.
How do you avoid overpayments?
- Show the current balance due on every invoice and reminder.
- Send a receipt for every payment, so customers can see what is already paid.
- Mark an invoice paid as soon as payment arrives, so no reminder goes out for it.
- When a credit memo changes an invoice, send the customer the updated balance.
- QuickBooks: Handle a customer credit or overpayment in QuickBooks Online
- QuickBooks: Record invoice payments in QuickBooks Online
- QuickBooks: Create and apply credit memos or delayed credits in QuickBooks Online
Every figure on this page was checked against these sources on Oct 6, 2026. General information, not legal or tax advice.