# Changing plans

> How upgrades, downgrades and interval changes take effect and how they are prorated.

Source: https://shopassist.coec.dk/docs/billing/changing-plans · Updated 2026-10-01

Owners change plans under **Billing → Change plan**. You always see a preview of the price and the date of the change before confirming.

[Open billing & usage](/app/go/billing)

## Upgrades [#upgrades]

A higher plan, or monthly to yearly on the same plan, takes effect immediately. You are charged the prorated difference for the rest of the period; a yearly upgrade credits the unused part of the year.

## Downgrades [#downgrades]

A lower plan, or yearly to monthly, takes effect at the end of the current period. Until then you keep your current plan. You can undo a scheduled downgrade before it takes effect.

If the lower plan has smaller limits (stores, seats, products, knowledge pages), ShopAssist tells you what will change before you confirm. Nothing is deleted: features above the new plan are switched off and data stays until you upgrade again or delete it.

## Restrictions [#restrictions]

* While a payment is overdue, you can only downgrade or cancel.
* Enterprise plans are changed by COEC; [contact sales](/contact).
* The currency is fixed after your first subscription or invoice.
* Shopify App Store installs change plans on Shopify's pricing page; see [Shopify billing](/docs/billing/shopify-billing).