---
title: Custom rules · Cloudflare Load Balancing docs
description: Custom load balancing rules let you customize the behavior of your load balancer based on the characteristics of a request.
lastUpdated: 2025-01-16T16:11:26.000Z
source_url:
  html: https://3ddc496d.preview.developers.cloudflare.com/load-balancing/additional-options/load-balancing-rules/index.md
  md: https://3ddc496d.preview.developers.cloudflare.com/load-balancing/additional-options/load-balancing-rules/
---

Custom load balancing rules let you customize the behavior of your load balancer based on the characteristics of a request.

For example, you can use URL-based routing, or create a rule that selects a pool based on the URI path of an HTTP request.

## How custom rules work

As with [WAF custom rules](https://developers.cloudflare.com/waf/custom-rules/), each load balancing custom rule is a combination of two elements: an [expression](https://developers.cloudflare.com/load-balancing/additional-options/load-balancing-rules/expressions/) and an [action](https://developers.cloudflare.com/load-balancing/additional-options/load-balancing-rules/actions/). Expressions define the criteria for an HTTP request to trigger an action. The action tells Cloudflare how to handle the request.

You can [create Load Balancing rules](https://developers.cloudflare.com/load-balancing/additional-options/load-balancing-rules/create-rules/) whenever you create or edit a load balancer in **Traffic** > **Load Balancing**.

When building expressions for Load Balancing rules, refer to [Supported fields and operators](https://developers.cloudflare.com/load-balancing/additional-options/load-balancing-rules/reference/) for definitions and usage.

## Availability

By default, non-Enterprise customers have **one** Load Balancing rule **per load balancer hostname**. For more rules, upgrade to [Enterprise](https://www.cloudflare.com/enterprise/).

## Limitations

At the moment, you cannot use Load Balancing rules with [Cloudflare Spectrum](https://developers.cloudflare.com/spectrum/about/load-balancer/).

Custom load balancing rules are incompatible with [Geo steering](https://developers.cloudflare.com/load-balancing/understand-basics/traffic-steering/steering-policies/geo-steering/). As a result, any custom rule applied to Geo-steered load balancers will not function as expected.
