Looking for a plugin

Hi @gust4v023,

Thank you for reaching out.

We have this plugin called Extra Custom Product Options for WooCommerce, which allows you to add additional options to your WooCommerce products. This plugin can be used to create variable pricing structures like the one you described. You can create an option for an extended warranty and set the price as a percentage of the product price.

Please note that this is a premium plugin that offers a 30-day money-back guarantee, which means, should it not meet your expectations within the first 30-days of purchase, you get a full refund of your amount. Also, we provide full technical support for any extensions bought from our marketplace.

I hope this information is helpful. If you have any other questions or need further assistance, please don’t hesitate to ask.

You can use code in your child themes functions file like this:

add_action( 'woocommerce_before_add_to_cart_button', 'custom_product_addons', 10 );
function custom_product_addons() {
    global $product;
    $product_price = $product->get_price(); // Base price of the product.
    ?>
    <div id="product-warranty-addons">
        <p>Select Additional Warranty:</p>
        <button type="button" class="warranty-addon" data-addon="15" data-price="<?php echo esc_attr( $product_price ); ?>">
            Additional 4-Month Warranty (+15%)
        </button>
        <button type="button" class="warranty-addon" data-addon="30" data-price="<?php echo esc_attr( $product_price ); ?>">
            Additional 8-Month Warranty (+30%)
        </button>
    </div>
    <input type="hidden" id="addon_price_value" name="addon_price_value" value="0">
    <?php
}

add_action( 'wp_footer', 'custom_product_addons_script' );
function custom_product_addons_script() {
    if ( is_product() ) { ?>
        <script type="text/javascript">
            jQuery(document).ready(function($) {
                $('.warranty-addon').on('click', function() {
                    var addonPercentage = $(this).data('addon');
                    var basePrice = parseFloat($(this).data('price'));
                    var addonPrice = (addonPercentage / 100) * basePrice;
                    var totalPrice = basePrice + addonPrice;

                    // Update price display on the product page
                    $('.woocommerce-Price-amount').text('€' + totalPrice.toFixed(2));

                    // Set hidden input value for addon price
                    $('#addon_price_value').val(addonPrice.toFixed(2));
                });
            });
        </script>
    <?php }
}

add_filter( 'woocommerce_add_cart_item_data', 'custom_add_cart_item_data', 10, 2 );
function custom_add_cart_item_data( $cart_item_data, $product_id ) {
    if( isset( $_POST['addon_price_value'] ) ) {
        $cart_item_data['addon_price'] = sanitize_text_field( $_POST['addon_price_value'] );
        $cart_item_data['unique_key'] = md5( microtime().rand() ); // To avoid merging of items
    }
    return $cart_item_data;
}

add_action( 'woocommerce_before_calculate_totals', 'custom_addon_price_to_cart' );
function custom_addon_price_to_cart( $cart ) {
    if ( is_admin() && ! defined( 'DOING_AJAX' ) ) {
        return;
    }

    // Adjust the product price
    foreach ( $cart->get_cart() as $cart_item ) {
        if( isset( $cart_item['addon_price'] ) ) {
            $cart_item['data']->set_price( $cart_item['data']->get_price() + $cart_item['addon_price'] );
        }
    }
}

It’s been a while since your last reply @gust4v023, so I’m going to mark this thread as resolved. If you need more help with this, or any other issue, please feel free to start a new thread.