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No Coupons on Sale or Special Items

Zen Cart Coupons No Sale or Special

A module for Zen Cart™ that allows you to disallow the use of coupon discounts on items which are already on Sale or Special.

Relevance: Zen Cart™ 1.3.9, 1.5.0-1.5.5. This feature is built in to Zen Cart 1.5.6 and above.

Current Version: 1.3. Occasionally, new features are documented prior to being publicly available; please check the version history to ensure the feature you want is available in your version.

Support Thread: My commercial software is not supported on the Zen Cart forum. Please email me questions instead.

Cost: $20 (Note: this low price covers software only for self-installation.)

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Would you like to ask me questions before buying? I'm happy to help likely purchasers make the right decision. Please use my contact form.

Installed Cost: $120.00 (Professional installation by That Software Guy)

Installation Difficulty: Easy

Installation Instructions: click here

Buy: Buy Coupon No Sale or Special.
Pre-purchase questions? No problem! Just Please contact me with your question.

FAQ: click here


Many store-owners run both coupon based discounts, and Zen Cart Sales and Specials. If you want to avoid the double-discounting that occurs when a coupon is used on a sale or special item, you can do so with my Coupons No Sale or Special mod.


Consider the following coupon - a 10% off coupon called SAVETEN.

Example Zen Cart Coupon

Let's suppose your customer is interested in this item:

Example Zen Cart Sale Item

If they use the SAVETEN coupon, this is what the checkout confirmation page will look like:

Example Zen Cart Checkout Confirmation Page with Sale Item and Coupon Discount

With Coupons No Sale or Special, the coupon will not even be accepted.

Example Zen Cart Coupon Entry Rejected

If they have additional non-sale/non-special items in their cart, the coupon will be accepted but will apply only to those items.

Example Zen Cart Checkout Confirmation Page with Sale Item and Coupon Discount

(The discount is calculated based on the non sale/special total, $42.00 + $34.99 = $76.99, 10% of that is $7.70).

Installation Instructions:

  1. Back up everything! Try this in a test environment prior to installing it on a live shop.
  2. Depending on your Zen Cart version, copy the contents of 1.3.9, 1.5, etc. to the root folder of your shop.
  3. Big Chooser users: If you have made the Zero Dollar Coupon changes before to use no value coupons with Big Chooser, you will need to make it again; they are not included in the copy of ot_coupon.php that ships with this mod.


<zen cart version>/includes/modules/order_total/ot_coupon.php

Major Versions

  • Version 1.3 - 04/14/19 - Updates for 1.5.6
  • Version 1.2 - 09/18/16 - Updates for 1.5.5a
  • Version 1.1 - 01/02/15 - Updates for 1.5.4
  • Version 1.0 - 07/01/14 - First release


Q: I want the ability to place additional restrictions on coupon use. What can I do?
A: Please look at my Zen Cart Coupon Restrictions - Big Chooser Style mod.

I charge a fee of $20 for Coupons No Sale or Special. Buy Now.
The fee covers software only; installation is extra if you require help.