We bill for the Haste Pro service on the day you subscribe to Haste Pro. Usually this happens at the end of your trial period, but can occur whenever you decide to “go Pro.”
If at any time, for any reason you choose to suspend your Haste Pro account, you can come back to re-activate (or, re-subscribe to) Haste Pro. In that case, you will be billed on the day you re-subscribe.
If you choose to suspend your Haste account during an active billing period, you can continue to use the service until the end of that period.