> For the complete documentation index, see [llms.txt](https://help.zcal.co/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.zcal.co/invite-settings/sms-reminders.md).

# SMS Reminders

SMS reminders help ensure your attendees never miss a scheduled meeting. Note: SMS reminders are available on the Pro plan and above.

### Setting Up SMS Reminders

You can configure SMS reminders while creating or editing your scheduling link. Turning this setting on will automatically add a required phone number question to your invite link.

1\) Create a new invite or edit an existing invite.

2\) Navigate to the last step of the wizard

3\) Enable the `SMS reminder` switch

<figure><img src="/files/FqHeUAQ0ajdCgcb2dKPd" alt=""><figcaption></figcaption></figure>

4\) Set the amount of time before your event when the SMS reminder should be sent.

### SMS Credits and Limits

#### Monthly Credit Allowance

* Each account receives SMS credits per month (750 on the Pro plan, 1500 on the Business plan)
* Credits reset automatically on the 1st day of each month
* You'll receive an email notification if you exceed your monthly credit limit

#### Credit Usage by Country

SMS credit costs vary by country and are divided into three tiers:

**Tier 1 (10 credits per SMS)**

* United States (US)
* Canada (CA)

**Tier 2 (19 credits per SMS)**

* United Kingdom (GB)
* Brazil (BR)
* Mexico (MX)
* Australia (AU)
* South Africa (ZA)
* Colombia (CO)
* Thailand (TH)
* China (CN)

**Tier 3 (38 credits per SMS)**

* France (FR)
* India (IN)
* Netherlands (NL)
* Ireland (IE)
* Germany (DE)
* Spain (ES)
* Italy (IT)
* Finland (FI)
* Sweden (SE)
* Singapore (SG)
* Belgium (BE)
* Austria (AT)
* Poland (PL)
* Greece (GR)
* United Arab Emirates (AE)
* Argentina (AR)
* Japan (JP)
* Chile (CL)
* Saudi Arabia (SA)
* Estonia (EE)
* Portugal (PT)
* South Korea (KR)
* Taiwan (TW)
* Turkey (TR)
* Luxembourg (LU)
* Venezuela (VE)
* Romania (RO)
* Hungary (HU)
* Peru (PE)
* Lithuania (LT)
* New Zealand (NZ)
* Denmark (DK)
* Hong Kong (HK)
* Norway (NO)
* Costa Rica (CR)

#### Message Length and Credit Calculation

SMS messages are charged in 160-character chunks. If your message exceeds 160 characters, it will use additional credits accordingly:

* 1-160 characters = 1 SMS worth of credits
* 161-320 characters = 2 SMS worth of credits
* And so on...

For example:

* A 150-character message to the US = 10 credits
* A 200-character message to France = 76 credits (2 × 38 credits)

It is advised to keep your reminder messages concise to avoid using multiple SMS chunks

### Best Practices

1. Write clear, concise reminder messages
2. Include essential information only (date, time, and meeting link)
3. Set reminders at appropriate intervals (e.g., 24 hours before the meeting)

### FAQ

**Q: What happens if I run out of SMS credits?** A: You'll receive an email notification when you're running low on credits. Once depleted, no new SMS reminders will be sent until your credits reset on the 1st of the next month.

**Q: Do unused credits roll over to the next month?** A: No, unused SMS credits do not roll over. Your balance resets at the beginning of each month.

**Q: How many SMS reminders can I add?** A: Currently we support 1 SMS reminder per invite.