# One-time payment and Auto-renew (NCS circ)

## Overview

This guide is to explain how NCS Circ/Subscribe one-time and auto-renew payment options are displayed on the front-end applications and how payments are processed. This is a technical documentation

## Before you start

Make sure you meet the following pre-requisites before starting the how-to steps:

* Have Subscribe 3.13.1 version or above

## Details

### One-time Payment

#### Display:

* **Previous outstanding balance**. Use *‘Balance Due’* field from Circulation API, This value includes tax. 
* **Next Payment term and rates:** Use *‘Renewal Total Cost’* from Customer Service API. This value includes tax. 

#### Process payment: 

* Authorize and capture the sum of *‘Balance Due’* and *‘Renewal Total Cost’*

### Auto-renew sign up and previous balance due payment

#### Display:

* **Previous outstanding balance**: Use ***‘**Balance Due’* field from Circulation API. This value includes tax. 
* **Next Payment term and rates**: Use *‘Renewal Total Cost’* from Customer Service API. This value includes tax. 

#### Process payment:

* **Auto-renew sign up**. This is a billing change request in NCS Circ. No payment is authorized and captured.
* **Previous outstanding balance**. Authorize and capture *‘Balance Due’*.

{% hint style="info" %}
**‘Grace Owned’** is different than **‘Balance Due’** in NCS Circ Customer Service API. ‘Grace Owned’ is assigned when a subscription is *stopped* and payment is not settled whereas ‘Balance due’ is for *active* subscriptions.
{% endhint %}