Yes. Plot Core can be cancelled at any time, Plot Managed runs for its 12-month commitment, and you can move between the two plans.
Cancelling:
During the trial: both plans can be cancelled free in the 7-day trial on your first site.
Plot Core: cancel any time. You are not charged for the following month.
Plot Managed: it runs to the end of its 12-month commitment. It then renews for another 12 months at your agreed monthly price unless you cancel before renewal. We send one reminder 30 days before.
Switching:
Core to Managed: any time. Your unused paid Core time is credited towards your first Managed payment, and the 12-month term starts when the upgrade payment goes through.
Managed to Core during the trial: you can switch while your trial is active, and you keep your original trial end date.
Managed to Core after that: schedule the move for the end of your 12-month term.
Other things people ask:
Do I lose features if I move to Core? No. Every feature is on both plans. What changes is the Managed service: the design specialist, ongoing design support, the annual site review and your named email contact.
Is there a refund if I cancel? There is no money-back guarantee. The free trial is how you try Plot before paying.
I have several sites. Do I have to change them all? Each site has its own plan.
Can I leave Plot Managed early? Managed is a 12-month commitment. You can choose to cancel or downgrade to Core at any point, but the change takes effect at the end of the 12 months. As long as you have selected cancel or downgrade before your renewal date, it will not renew for another 12 months.
How do I cancel? There is a cancel button in the Plan options in your admin.
What happens to my site if I cancel or my trial lapses? You lose access to the site and its content. Copy out anything you want to keep by hand before then, or ask us to do an export for you, which is a paid service (the price is in How much is Plot?). A site can be recovered for 90 days by logging in and adding payment against it.
More on terms in is there a contract, and prices in how much is Plot.