Odoo Ecommerce software offers a free one-app plan that includes all core online store functionality, product catalog, shopping cart, checkout, and basic reporting, without any monthly subscription. For UK businesses, the Odoo online store on this free plan handles VAT for domestic and cross-border sales. If you need advanced Odoo Ecommerce features like multi-website management, automated marketing campaigns, or integration with other Odoo apps, paid plans start around £20 per user monthly. Many UK small businesses begin with the free plan and upgrade only when their operations require additional capabilities.