---
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headline: "63018: Rate limit exceeded for Channel"
url: https://www.twilio.com/docs/api/errors/63018
inLanguage: en
dateModified: 2026-06-18T19:28:15.000Z
author:
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  name: Twilio Developer Education Team
publisher:
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  name: Twilio
---

# 63018: Rate limit exceeded for Channel

Log Type: APPLICATION

Log Level: ERROR

## Description

This error occurs when you send messages faster than the channel, sender, or account can process them.

### Possible causes

* Your account is sending messages faster than its available throughput. When you exceed your account-based messages-per-second (MPS) rate, Twilio begins queuing messages.
* Your RCS sender exceeded the rate supported for that sender. RCS senders support 100 messages per second by default.
* Your WhatsApp sender exceeded the sender throughput configured for outbound traffic. By default, each WhatsApp sender supports 80 messages per second for text or media.
* Your WhatsApp business portfolio reached its messaging limit for business-initiated conversations that are outside the customer-service window. That limit is shared across senders in the same business portfolio.
* Your account is sending too many messages from a single phone number to the same WhatsApp recipient.

### Possible solutions

* Throttle your application so that it does not submit messages faster than the throughput available to your account or sender.
* For RCS traffic, spread requests over a longer period so that the sender stays within its default 100 MPS limit and messages do not need to be queued.
* For WhatsApp traffic, wait until capacity becomes available again before starting more business-initiated conversations. If your business portfolio messaging limit was reached, new conversations can start again as active conversations end.
* If you need higher sustained volume, distribute traffic across multiple approved senders by using a Sender Pool or a Messaging Service sender pool where your use case supports it.
* For WhatsApp text-only traffic, request higher sender throughput if your use case requires it. Media throughput cannot be increased beyond 80 MPS.
* For WhatsApp, reduce how frequently you send to the same recipient to avoid triggering this error.

#### Additional resources

* [The WhatsApp Business Platform with Twilio: Best Practices and FAQs](/docs/whatsapp/best-practices-and-faqs)
* [Sender Pools](/docs/bulk-messaging/sender-pools)
* [What are WhatsApp sender message limits and quality rating?](https://help.twilio.com/articles/360024008153)