---
title: SubscriptionBillingCyclesSortKeys - Customer API
description: The set of valid sort keys for the SubscriptionBillingCycles query.
api_version: 2026-01
api_name: customer
type: enum
api_type: graphql
source_url:
  html: >-
    https://shopify.dev/docs/api/customer/latest/enums/SubscriptionBillingCyclesSortKeys
  md: >-
    https://shopify.dev/docs/api/customer/latest/enums/SubscriptionBillingCyclesSortKeys.md
---

# Subscription​Billing​Cycles​Sort​Keys

enum

The set of valid sort keys for the SubscriptionBillingCycles query.

## Valid values

* CYCLE\_​END\_​AT

  Sort by the `cycle_end_at` value.

* CYCLE\_​INDEX

  Sort by the `cycle_index` value.

* ID

  Sort by the `id` value.

***

## Fields

* [Subscription​Contract.upcomingBillingCycles(sortKey)](https://shopify.dev/docs/api/customer/latest/objects/SubscriptionContract#field-SubscriptionContract.fields.upcomingBillingCycles.arguments.sortKey)

  ARGUMENT

  A Subscription Contract.

***

## Map

### Arguments with this enum

* [Subscription​Contract.upcomingBillingCycles(sortKey)](https://shopify.dev/docs/api/customer/latest/objects/SubscriptionContract#field-SubscriptionContract.fields.upcomingBillingCycles.arguments.sortKey)