Connect Google Calendar with Zapier for appointment reminders

1. Verify Google Workspace account

Go to admin.google.com and sign in with the company account. Check under Apps that Calendar is enabled. Without the release, Google Workspace later blocks Zapier access. Cost: Workspace Business Starter is 6.60 euros per user per month (August 2026).

2. Create Zapier account

Visit zapier.com and pick the Starter plan at 19.99 US dollars monthly. The plan allows 750 tasks per month. Below that limit only 100 tasks remain — insufficient for three customer appointments.

3. Build the first Zap

Click “Create Zap”. Choose trigger “Google Calendar – Event Start”. Connect the same Google account checked earlier. Skip this step and Zapier stays blind to events.

4. Add filter

Insert a filter: only events containing the word “client” in the title. Zapier lets every other appointment through without the filter. That creates unwanted emails and webhooks.

5. Define action

Select action “Gmail – Send Email”. Pull the customer address from the calendar entry. The template includes date, time and location. Without this action customers receive no reminder.

6. Run test

Zapier offers a “Test” button. Create a test appointment in Google Calendar and execute the Zap. If the test fails, Zapier shows the exact error code — usually missing rights in the Google account.

7. Step that frequently fails: Google Workspace permissions

Many users skip the admin release in step 1. Zapier then reports “403 Forbidden”. The automation never starts. Fixing the rights afterwards usually takes 15 to 20 minutes plus another test run.

The Zapier Starter plan covers 750 tasks. Anyone with more than 25 customer appointments per week hits the limit quickly. Upgrading to 49 US dollars monthly is not always worthwhile — extra tasks then cost 0.01 US dollars each.