What happens if I upgrade my systeme.io plan while paying through PayPal?

Card-paid upgrades get a grace period. PayPal-paid upgrades do not

Upgrading itself works the same way regardless of gateway: Settings, then My plan, pick the plan, then Upgrade plan.

If the subscription being upgraded was paid by card, systeme.io converts the remaining time left on the current plan into a free trial of the new one. The full price is only charged once that trial ends, and the higher plan is not granted until that payment succeeds.

If it was paid through PayPal, none of that applies. Because PayPal does not support prorated payments, you are charged the full price of the new subscription right away. systeme.io's own wording is that this holds even if you choose to pay for the upgrade itself with a credit card. What decides the outcome is how the subscription you are leaving was paid, not how you pay for the new one.

The part that catches people out: the old plan is not cancelled for you

On a PayPal-paid upgrade, systeme.io says you also need to contact support to make sure the previous subscription is actually cancelled. Nothing in the article says this happens automatically, unlike the card-paid case above. Skip that step and the old PayPal subscription can keep charging alongside the new one.

What is not addressed

The article does not say whether the full charge on a PayPal upgrade includes any credit for time already paid for and not used on the old plan, only that the payment is not prorated. It also does not describe a refund process for the unused portion. Anyone weighing an upgrade on a PayPal-paid plan is best asking support about both before clicking Upgrade plan, not after.