# Minimum Purchase Quantity per Product

> Requires shoppers to buy at least a set number of each product, for example 2, and sets the quantity box to start at that number.

- Type: PHP
- Runs: Run everywhere
- Category: [WooCommerce](https://wpide.com/library/category/woocommerce/)
- Requires: WooCommerce
- Tags: woocommerce, quantity, cart, wholesale
- Author: WPIDE Team
- Installs: 0
- Updated: 2026-10-28
- Page: https://wpide.com/library/woo-minimum-quantity/

## Code

```php
$wpide_min_qty = array(
    'minimum'     => 2,       // Minimum units per product.
    'product_ids' => array(), // Limit to these product IDs, empty for all.
);

$wpide_min_qty_applies = function ( $product_id ) use ( $wpide_min_qty ) {
    return empty( $wpide_min_qty['product_ids'] ) || in_array( (int) $product_id, array_map( 'intval', $wpide_min_qty['product_ids'] ), true );
};

add_filter( 'woocommerce_quantity_input_args', function ( $args, $product ) use ( $wpide_min_qty, $wpide_min_qty_applies ) {
    $id = $product->get_parent_id() ? $product->get_parent_id() : $product->get_id();

    if ( $product->is_sold_individually() || ! $wpide_min_qty_applies( $id ) ) {
        return $args;
    }

    $args['min_value'] = $wpide_min_qty['minimum'];

    if ( ! is_cart() && (int) $args['input_value'] < $wpide_min_qty['minimum'] ) {
        $args['input_value'] = $wpide_min_qty['minimum'];
    }

    return $args;
}, 10, 2 );

add_action( 'woocommerce_check_cart_items', function () use ( $wpide_min_qty, $wpide_min_qty_applies ) {
    foreach ( WC()->cart->get_cart() as $item ) {
        $product = $item['data'];

        if ( $product->is_sold_individually() || ! $wpide_min_qty_applies( $item['product_id'] ) ) {
            continue;
        }

        if ( (int) $item['quantity'] < $wpide_min_qty['minimum'] ) {
            wc_add_notice( sprintf( 'Please order at least %1$d of "%2$s".', $wpide_min_qty['minimum'], $product->get_name() ), 'error' );
        }
    }
} );
```

## Notes

Change $minimum. Add product IDs to $product_ids to apply the rule only to those products; leave it empty for all products.

## How to use it

Install the free WPIDE plugin (https://wordpress.org/plugins/wpide/), find "Minimum Purchase Quantity per Product" in its snippet library and add it in one click; or create a new PHP snippet in WPIDE (or any code snippets plugin) and paste the code above. More snippets: https://wpide.com/library/