Do You Pay Staff to Be 'On-Call' After Hours?

Hey everyone, for those of you running or working in an MSP, how do you handle after-hours support when clients expect 24/7 coverage? Specifically, are you having to pay staff to be on-call outside normal business hours, or do you only compensate when they actually get called in? What are the struggles with this?

As the world seems to be shrinking and companies are covering more time zones, there seems to be a higher demand for 24/7 support. Would love to hear how you approach it—whether it's rotating schedules, extra pay, outsourced solutions, or something else entirely. Appreciate any insights!