---
title: Price by Quantity Developer Hooks and Filters Reference
description: "Developer reference for WooCommerce price by quantity: pricing, table, products-list and quantity dropdown filters."
url: "https://wpfactory.com/docs/price-by-quantity-developer-hooks-filters/"
updated: "2026-09-27"
category: Developers
---

# Price by Quantity Developer Hooks and Filters Reference

This reference lists the PHP hooks and filters exposed by [Price by Quantity & Bulk Quantity Discounts for WooCommerce](https://wpfactory.com/item/product-price-by-quantity-for-woocommerce/) so developers can customize pricing, tables and the quantity dropdown. Names are current as of Pro 4.1.0. Add your callbacks in a child theme's `functions.php` or a small custom plugin.

### Pricing and quantity filters

| Filter | What it lets you change |
| --- | --- |
| `alg_wc_wholesale_pricing_get_levels_data` | The array of pricing levels resolved for a product. |
| `alg_wc_wholesale_pricing_get_discount_type` | The discount type used for a product and quantity. |
| `alg_wc_wholesale_pricing_get_total_quantity` | The total quantity counted towards levels (used by the grouping options). |
| `alg_wc_wholesale_pricing_get_placeholders` | The placeholder values available to templates. |
| `alg_wc_ppq_discount_by_quantity` | The computed discount for a given quantity. |
| `alg_wc_wholesale_pricing_is_enabled_per_term` | Whether per-term (category or tag) pricing is enabled for a product. |
| `alg_wc_wholesale_pricing_settings_per_item_get_options` | The per-product / per-term option definitions. |

### Table and products-list filters

| Filter | What it lets you change |
| --- | --- |
| `alg_wc_product_ppq_table_placeholders` | Placeholders available inside the product pricing table. |
| `alg_wc_product_ppq_table_rows` | The full set of rows before the table is rendered. |
| `alg_wc_product_wholesale_pricing_table_heading_format` | The heading format per level. |
| `alg_wc_ppq_products_list_query_args` | The `wc_get_products()` query args for the products-list shortcode. |
| `alg_wc_ppq_products_list_row` | Each product row in the products list. |
| `alg_wc_ppq_products_list_custom_column` | Output for a custom (unrecognized) column value. |

### Quantity dropdown filters (Pro)

| Filter | What it lets you change |
| --- | --- |
| `alg_wc_wholesale_pricing_dropdown_custom_levels` | The custom values used to build the dropdown. |
| `alg_wc_wholesale_pricing_dropdown_levels_data_raw` | The raw level data before filtering. |
| `alg_wc_wholesale_pricing_dropdown_levels_data` | The final level data after filtering. |
| `alg_wc_wholesale_pricing_dropdown_input_value` | The default selected value. |
| `alg_wc_wholesale_pricing_dropdown_option_label` | Each option's label. |
| `alg_wc_wholesale_pricing_dropdown_option_style` | Each option's inline style. |
| `alg_wc_wholesale_pricing_dropdown_option_class` | Each option's CSS class. |

### Real-time price display filters

| Filter | What it lets you change |
| --- | --- |
| `alg_wc_ppq_price_display_by_qty_is_product` | Whether the real-time price display runs on the current page. |
| `alg_wc_ppq_price_display_by_qty_product_id` | The product id used for the real-time price display. |

### Actions

| Action | When it fires |
| --- | --- |
| `alg_wc_wholesale_pricing_core_loaded` | After the plugin core is loaded, passing the core instance. Use it to hook into pricing early. |
| `alg_wc_wholesale_pricing_settings_saved` | After the plugin's settings are saved. |

### Example

Round every computed dropdown quantity label to add "pcs.":

```
add_filter( 'alg_wc_wholesale_pricing_dropdown_option_label', function( $label, $qty ) {
    return $label . ' pcs.';
}, 10, 2 );
```

**Note:** the internal `alg_wc_wholesale_pricing_settings` filter is used by the plugin itself to gate Pro-only options and is not intended for site code.

### Need a hand?

Our team answers every ticket on the [Price by Quantity support forum](https://wpfactory.com/support/item/product-price-by-quantity-for-woocommerce/).

Related articles

- [Price by Quantity Placeholders Reference](https://wpfactory.com/docs/price-by-quantity-placeholders-reference/)
- [Show Real-Time Price by Quantity on the Product Page](https://wpfactory.com/docs/woocommerce-price-display-by-quantity/)
- [Fix Price-by-Quantity Decimal and Separator Issues](https://wpfactory.com/docs/fix-price-by-quantity-separators/)
- [How to Translate Price by Quantity Table and Plugin Strings](https://wpfactory.com/docs/translate-price-by-quantity/)
- [Speed Up Price Updates When Changing Quantity](https://wpfactory.com/docs/speed-up-price-updates/)