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Understand SMS quiet hours

Last updated: December 16, 2025

Available with any of the following subscriptions, except where noted:

If you're sending SMS messages through HubSpot, any SMS messages sent during quiet hours will automatically be deferred until quiet hours are complete.

Quiet hours are the period from 8PM to 8AM in a contact's local time zone when SMS laws in some places require they not be contacted. This restriction applies to both individual SMS messages and SMS messages sent through workflows.

Please note: your legal counsel is the best resource to give you advice about your company's legal obligations. This page is provided for information purposes only and is not included as part of the HubSpot Customer Terms of Service. It is not intended to provide legal advice, and HubSpot encourages customers to consult with their own legal counsel to understand the legal obligations applicable to their business. The information here is subject to change

Subscription required The following subscriptions are required to use these features: 

Understand limitations & considerations

You can review whether your contacts will be affected by quiet hour sending restrictions in the SMS message editor. 

  1. In your HubSpot account, navigate to Marketing SMS.
  2. Click the name of a drafted SMS message.
  3. Click the Sending tab.
  4. In the Sending method section, an alert will appear if you've scheduled your message during a time that falls within the quiet hours of any of your recipients.

Please note: if timezone information is not available for a recipient, their quiet hours will be set to the default for recipients in the United States, which is 8:00 PM US/Eastern to 8:00 AM US/Pacific.

  1. To turn off quiet hours restrictions, toggle the Quiet hours switch off. This is not recommended, as it can result in violations of SMS sending laws. 
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