---
title: Speed Up Price Updates When Changing Quantity
description: WooCommerce price slow to update when customers change quantity? Why the AJAX refresh lags and how to fix it.
url: "https://wpfactory.com/docs/speed-up-price-updates/"
updated: "2026-09-26"
category: Troubleshooting
---

# Speed Up Price Updates When Changing Quantity

## Speed up the real-time price update

If the price takes too long to update when a customer changes the quantity, go to WPFactory > Product Price by Quantity > Price Display by Qty > Advanced Options and lower the Refresh interval (default 500 milliseconds). Also exclude the Price by Quantity & Bulk Quantity Discounts for WooCommerce display script from deferral and minification in your caching plugin.

### Symptoms

- A noticeable delay after changing the quantity before the price updates.
- Customers report a laggy quantity field.

### Cause

The price display polls on a fixed interval and calls `admin-ajax.php`. Slow updates usually come from that interval, from a slow server response, or from caching plugins that defer or minify the plugin's script.

### Fix step by step

1. **Lower the refresh interval.** Go to **WPFactory > Product Price by Quantity > Price Display by Qty > Advanced Options** and reduce **Refresh interval** (`alg_wc_wholesale_pricing_price_by_qty_display_interval_ms`, default `500` milliseconds). A smaller value updates sooner; do not set it so low that it floods the server with requests.
2. **Exclude the plugin script from optimization.** In your caching or performance plugin, exclude `alg-wc-wholesale-pricing-price-by-qty-display.js` from deferral and minification.
3. **Check the console.** A JavaScript error from another script can halt the update. Fix those errors.
4. **Check server response time.** In the browser Network tab, watch the `alg_wc_wholesale_pricing_price_by_qty_display` AJAX call. If the server is slow to respond, review hosting or object caching.

**Tip:** if you use a non-standard quantity input such as the Pro dropdown and the price does not refresh, enable **Force standard quantity input** (`alg_wc_wholesale_pricing_price_by_qty_standard_qty_input`) in the same Advanced Options group.

### Still slow?

Share your findings with our team on the [Price by Quantity support forum](https://wpfactory.com/support/item/product-price-by-quantity-for-woocommerce/).

Related articles

- [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/)
- [Fix Price-by-Quantity Table Display Issues](https://wpfactory.com/docs/fix-price-by-quantity-table/)
- [Show Real-Time Price by Quantity on the Product Page](https://wpfactory.com/docs/woocommerce-price-display-by-quantity/)
- [Price by Quantity Placeholders Reference](https://wpfactory.com/docs/price-by-quantity-placeholders-reference/)