--- title: Limit the Purchase Quantity Per Cart shortDescription: Cap how many units of a product a supporter can buy in a single checkout using the Advanced Settings limit on each product. articleType: Tutorial primaryTopic: limit-purchase-quantity-per-cart categories: - Products - Account Management tags: - product-settings - advanced-settings - quantity-limit - checkout - cart-limit - on-demand-products - self-fulfilled-products - digital-products tasks: - Set a maximum purchase quantity for a product - Limit how many units a supporter can buy at once - Update the per-cart quantity limit on a product - Remove the purchase quantity limit from a product terms: - purchase quantity limit - max quantity per cart - limit quantity per checkout - cart limit - per order limit - quantity cap - one per customer - buy limit - product purchase limit - maximum quantity - hasMaxQuantityPerCart - maxQuantityPerCart labels: - product-settings - advanced-settings - quantity-limit - checkout contextString: Available on all plans. Configured per product in Advanced Settings. Works for on-demand, self-fulfilled, and digital products. breadcrumbPath: "Manage my shop > Shop Settings > Limit the Purchase Quantity Per Cart" relatedModules: - name: products-list route: /admin/dashboard/products/all/ - name: catalog-product-all route: /admin/products/all - name: settings-checkout route: /admin/dashboard/settings/checkout last_updated: '2026-05-10' path: manage-my-shop/shop-settings/limit-purchase-quantity-per-cart --- # Limit the Purchase Quantity Per Cart The **Limit quantity that can be purchased at once** setting lets you cap how many units of a product a supporter can add in a single cart. This is useful for keeping limited releases fair, preventing bulk buying, and ensuring more supporters can access high-demand products. The setting is configured per product in **Advanced Settings** and is available on all plans. ## What this setting does The limit applies per cart: it caps the number of units of that product a supporter can include in a single checkout. It is not a lifetime limit per supporter and does not affect inventory. - **Per cart, not per supporter.** A supporter can place a second order later and hit the same limit again. - **Not inventory.** The limit does not reduce stock or affect how many units you have available. Manage inventory directly on each product for stock tracking. - **Per product.** Each product has its own limit. The cap on one product does not affect other products in the same cart. ## How to set the purchase quantity limit The setting lives in each product's **Advanced Settings**. 1. Go to [**Products**](https://my-shop.fourthwall.com/admin/dashboard/products/?redirect) in your dashboard. 2. Select the product you want to update. 3. Open **Advanced Settings** from the three-dot menu on the product detail page, or scroll to the **Advanced Settings** section. 4. Find the **Limit quantity that can be purchased at once** section. 5. Check the box labeled **Set a limit for the maximum quantity of this product that can be purchased at one time**. 6. Enter a whole number in the **Limit** field. The value must be between **1** and **9999**. 7. Click **Save**. [Image: Product Advanced Settings page showing the Limit quantity that can be purchased at once section with the checkbox enabled and a numeric value entered in the Limit field] The cap applies to all future carts that include this product. Orders already placed are not affected. ## Which product types this works for The setting is available on every product type. There is no restriction based on manufacturing service or plan. - **On-demand products** from the Fourthwall catalog - **Self-fulfilled products** you ship yourself - **Digital products** like downloads, license keys, and access codes ## What supporters see at checkout When a supporter tries to add more than the allowed quantity to their cart, Fourthwall enforces the cap on the product page and at checkout. The supporter cannot complete the purchase with more units than the limit allows. [Image: Product page showing the customer-facing behavior when the per-cart quantity limit is reached, including a disabled add-to-cart button or inline limit message] A supporter who wants more units than the cap allows can place a second order in a separate checkout. ## How to remove or change the limit To raise the cap, lower it, or turn it off entirely: 1. Go to [**Products**](https://my-shop.fourthwall.com/admin/dashboard/products/?redirect) in your dashboard. 2. Select the product. 3. Open **Advanced Settings**. 4. To change the cap, update the **Limit** value. To turn the limit off, uncheck the **Set a limit for the maximum quantity of this product that can be purchased at one time** box. 5. Click **Save**. Future carts use the new value right away. Orders already placed stay as they were. ## Frequently asked questions ### Is the limit per supporter or per cart? Per cart. The cap applies to a single checkout. A supporter can place another order later and reach the same cap again. ### What is the maximum value I can set? You can enter any whole number from 1 to 9999. Decimals and negative numbers are not accepted. ### Does this work for digital products? Yes. The setting works for digital products, on-demand products, and self-fulfilled products. ### Does the limit affect my inventory? No. The limit only controls how many units fit in one cart. It does not change stock counts or product availability. Manage inventory directly on each product if you need to track stock. ### Can I set the same limit across all products at once? No. The cap is configured on each product individually in **Advanced Settings**. ### What happens to existing orders if I change the limit? Nothing. The new cap applies to future carts only. Orders already placed are not adjusted.