---
title: "Overpayment didn't carry over to another invoice"
slug: "applying-a-payment-to-a-future-invoice"
updated: 2026-10-15T02:21:40Z
published: 2026-10-15T02:21:40Z
canonical: "help.servicetitan.com/applying-a-payment-to-a-future-invoice"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://help.servicetitan.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Overpayment didn't carry over to another invoice

![](https://cdn.document360.io/961862ab-d0f2-4d91-bb62-a62ee8184eff/Images/Documentation/anvil-wrench.png?sv=2026-02-06&spr=https&st=2026-10-17T12%3A20%3A13Z&se=2026-10-17T13%3A20%3A13Z&sr=c&sp=r&sig=nX2EKG0rjrFkizNU82GI4%2BQF18X7mFQyKXdicHEseRM%3D) Troubleshooting **Role:** Administrator · Bookkeeper · Office Admin**Area:** Payments, Accounts Receivable, Invoicing · All business types

## **What you're seeing**

A customer paid more than one invoice's total, intending part of the payment to cover another invoice. The extra amount didn't move to the other invoice. Instead, the invoice you collected on shows a negative balance, and the other invoice still shows as unpaid.

## **Why this happens**

**Reason 1**

**A payment collected on a single invoice applies only to that invoice.** When the payment is more than that invoice's total, the extra amount creates a negative balance on it instead of moving to another invoice. To spread one payment across more than one invoice, the extra has to be turned into customer credit first, then applied to each invoice. Credit can only be applied to an invoice that already exists and has an outstanding balance, so if the other invoice hasn't been created yet, the credit waits on the customer's profile until it has.

## **How to fix it**

Turn the overpayment into credit, then apply it to each invoice.

### **1****Convert the overpayment to credit and apply it**

> [!NOTE]
> **Caution:** Before you start — if the payment has already been exported, you can't unapply it. Instead, add the overpaid amount as credit to the customer profile, then apply it. See **Manage customer credits** for the exported-payment workflow.

1. Search for and go to the invoice with the overpayment.
2. Unapply the payment from this invoice. This turns the payment into credit on the customer's profile.
3. Search for and go to the customer profile.
4. On the customer profile, click the **More** icon, then **Collect Payment**.
5. On the **Collect and Apply Payments** screen, select the **Credits** option.
6. In the **Credits** section that expands, select the payment you want to use.
7. In the **Apply to Invoice** section, select the invoice you want to apply the payment to.
8. Click **Save**.
9. Repeat steps 4–8 to apply the remaining amount to the other invoice.

> [!NOTE]
> **✓ Done ·** Each invoice shows the correct amount applied, no invoice shows a negative balance, and any amount not yet applied remains as available credit on the customer's profile.

## **Still not working?**

Contact ServiceTitan Technical Support at [**go.servicetitan.com/ask**](https://go.servicetitan.com/ask) with:

- The customer name and account
- The invoice number with the overpayment and the invoice(s) the credit should go to
- The payment amount, date, and how it was split
- Which steps from this article you already tried

## **Want to learn more?**

[**Use search in ServiceTitan ›**](https://help.servicetitan.com/docs/use-search-in-servicetitan) How to find invoices and customer profiles quickly.

[**Manage customer credits ›**](https://help.servicetitan.com/docs/how-to-add-a-credit-to-a-customer-profile) Add credit to a customer profile, including the exported-payment workflow.

[**Apply credit or payment to an invoice ›**](https://help.servicetitan.com/docs/apply-credit-or-payment-to-an-invoice) How credit and payments are applied to outstanding invoices.