This depends on the subscription duration:
1-year subscriptions: No downgrades are allowed during the active subscription period.
At the end of the subscription: Yes, downgrades are possible after the current subscription ends, but you must notify us 45 days prior to expiration to sign a new agreement.
3-year subscriptions: Yes, downgrades are allowed at the end of a year, but this requires terminating the original agreement and signing a new one.
Please check specific service FAQs, as options may vary by service.