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Snippet · PHP

Add a Custom Checkout Field in WooCommerce

Shared by Amit Dholiya · September 2, 2026 · @woocommerce_checkout_fields

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You can add your own field to the WooCommerce checkout page, such as Delivery Instructions, Company Name, or GST Number.

Steps

  1. Open your theme’s functions.php file.
  2. Add the code below.
  3. Save the file.
  4. Open the WooCommerce Checkout page.

Done — a new Delivery Instructions field will appear in the checkout form.

function add_delivery_instructions_field( $fields ) {

    $fields['billing']['delivery_instructions'] = array(
        'type'        => 'textarea',
        'label'       => 'Delivery Instructions',
        'placeholder' => 'Enter any special delivery instructions',
        'required'    => false,
        'class'       => array( 'form-row-wide' ),
        'priority'    => 120,
    );

    return $fields;
}

add_filter(
    'woocommerce_checkout_fields',
    'add_delivery_instructions_field'
);
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