You can change your plan whenever your needs change, from My Account → Usage and billing → Upgrade. Only the workspace owner can change the plan.
Upgrades take effect immediately. You get the new plan's full monthly hours right away, and the prorated difference is charged today.
Downgrades also take effect immediately, not at your next cycle. Unused time on your previous plan becomes a credit on your next bill. If you've already used more hours than the new plan includes, your team pauses until your next reset.
Monthly, quarterly, or yearly: switch between them from the same page. The same proration applies.
Paying with PayPal, Klarna, or a similar wallet? Add a card first: plan changes that need a payment can't use those methods.
For current plans and prices, see Marblism pricing plans & billing cadence.