What you have in mind can be done as PayPal does have "discount" variables however, the type of code you need has to be manually created and you're going to need a script to manage the logic. The PayPal Payments Standard checkout screen does not have an option to input custom coupon codes or discount codes so this has to be done your web page or site, then the end amount is passed to the PayPal Checkout Screen. What's fun about scripts, you can also do an on screen validation of the code or not even include the code if you don't have one. For learning purposes, see the example below - it should help you with some ideas and you can learn about using the "discount" variables here. <!doctype html>
<html lang="en">
<head>
<title>Add To Cart Discount Example</title>
<!-- START META TAG SECTION -->
<meta name="Description" content="">
<meta name="KeyWords" content="">
<meta charset="UTF-8">
<!-- END META TAG SECTION -->
<!-- Start of Script -->
<script language = "javascript">
<!--
function validate(text1,text2) {
if (text1 == text2)
{
window.alert("Nice, you get a 10% Discount!");
}
if (text1 !== text2)
{
window.alert("Sorry, No Discount!");
}
}
function CalculateOrder(form) {
if (form.text1.value == "GOLD10")
{
form.discount_rate.value = "10";
form.discount_rate2.value = "10";
form.on3.value = "Coupon Entered";
form.os3.value = "GOLD10";
}
}
//-->
</script>
<!-- End of Script -->
</head>
<body>
<!-- START SAMPLE CODE SECTION -->
<!-- PARAGRAPH 1 -->
Discount & Coupon Examples
<br><br>
Add to Cart - Enter the Promo Coupon Code, Get a 10% Discount, on Screen Validation.
<br><br>
Notes:<br>
This example uses a script to verify the Promo Coupon Code and then applies the associated Discount Rate using the the "discount_rate" and the "discount_rate2" variables.
<br><br>
Give it a try, the Promo Coupon Code is: GOLD10
<br><br>
<!-- START CONTENTS -->
<!-- START BUTTON EXAMPLES -->
Widgets in Space
<br><br>
Widget Cupcakes
<br><br>
<!-- Start of Add to Cart Form -->
<!-- Note: target="paypal" was replaced with target="_self" -->
<!-- Note: shopping_url also added to code -->
<!-- These two changes allow better functionality with IE and Firefox -->
<form target="_self" action="https://www.paypal.com/cgi-bin/webscr" method="post">
Please Choose:  
<input type="hidden" name="on0" value="Choice">
<select name="os0">
<option value="Standard, 6 each per Box" selected>Standard, 6 each per Box - $9.95</option>
<option value="Standard, 12 each per Box">Standard, 12 each per Box - $16.95</option>
<option value="Deluxe, 6 each per Box">Deluxe, 6 each per Box - $12.95</option>
<option value="Deluxe, 12 each per Box">Deluxe, 12 each per Box - $22.95</option>
</select>
<!-- option_index value=0 is associated with variable on0 -->
<!-- option_index value=1 is associated with variable on1 -->
<input type="hidden" name="option_index" value="0">
<!-- -->
<input type="hidden" name="option_select0" value="Standard, 6 each per Box">
<input type="hidden" name="option_amount0" value="9.95">
<input type="hidden" name="option_item_number0" value="S-6-BOX">
<!-- -->
<input type="hidden" name="option_select1" value="Standard, 12 each per Box">
<input type="hidden" name="option_amount1" value="16.95">
<input type="hidden" name="option_item_number1" value="S-12-BOX">
<!-- -->
<input type="hidden" name="option_select2" value="Deluxe, 6 each per Box">
<input type="hidden" name="option_amount2" value="12.95">
<input type="hidden" name="option_item_number2" value="D-6-BOX">
<!-- -->
<input type="hidden" name="option_select3" value="Deluxe, 12 each per Box">
<input type="hidden" name="option_amount3" value="22.95">
<input type="hidden" name="option_item_number3" value="D-12-BOX">
<!-- -->
<br><br>
Cupcake Flavors:  
<input type="hidden" name="on1" value="Flavor">
<select name="os1">
<option value="Vanilla Dream" selected>Vanilla Dream</option>
<option value="Berry Burst">Berry Burst</option>
<option value="Chocolicious">Chocolicious</option>
<option value="Carrot Passion">Carrot Passion</option>
<option value="Banana Karma">Banana Karma</option>
<option value="Mocha-Chococcino">Mocha-Chococcino</option>
</select>
<br><br>
Optional Gift Message:  
<input type="hidden" name="on2" value="Optional Gift Message">
<input type="text" name="os2" maxlength="60">
<br><br>
<!-- Start Coupon Validate -->
Enter Promo Coupon - Get 10% Off:
   
<input type="text" name="text1">
<input type="button" value="Check It" name="Submit" onclick=javascript:validate(text1.value,"GOLD10") >
<!-- End Coupon Validate -->
<br><br><br>
<input type="image" src="https://www.paypalobjects.com/en_US/i/btn/btn_cart_LG.gif" border="0" onclick=CalculateOrder(this.form) name="submit" alt="Make payments with PayPal - it's fast, free and secure!">
<img alt="" border="0" src="https://www.paypalobjects.com/en_US/i/scr/pixel.gif" width="1" height="1">
<input type="hidden" name="add" value="1">
<input type="hidden" name="cmd" value="_cart">
<!-- Replace "business" value with your PayPal Email Address or your Merchant Account ID -->
<input type="hidden" name="business" value="your PayPal Email Address or your Merchant Account ID">
<input type="hidden" name="item_name" value="Widget Cupcakes">
<input type="hidden" name="no_shipping" value="2">
<input type="hidden" name="discount_rate">
<input type="hidden" name="discount_rate2">
<input type="hidden" name="on3">
<input type="hidden" name="os3">
<!-- Replace value with the web page you want the customer to return to -->
<input type="hidden" name="shopping_url" value="http://www.yourwebsite.com/Shop.html">
<!-- Replace value with the web page you want the customer to return to after a successful transaction -->
<input type="hidden" name="return" value="http://www.yourwebsite.com/ThankYou.html">
<!-- Replace value with the web page you want the customer to return to after item cancellation -->
<input type="hidden" name="cancel_return" value="http://www.yourwebsite.com/Cancel.html">
<input type="hidden" name="currency_code" value="USD">
<input type="hidden" name="lc" value="US">
<input type="hidden" name="button_subtype" value="products">
<input type="hidden" name="no_note" value="0">
<input type="hidden" name="bn" value="PP-ShopCartBF:btn_cart_LG.gif:NonHosted">
</form>
<!-- End Add to Cart Button Code -->
<br>
<!-- Start of View Cart Button Code -->
<form target="_self" action="https://www.paypal.com/cgi-bin/webscr" method="post">
<!-- If using a Business or Company Logo Graphic, include the "cpp_header_image" variable. -->
<input type="hidden" name="cpp_header_image" value="https://yourwebsite.com/logo.jpg">
<input type="hidden" name="cmd" value="_cart">
<input type="hidden" name="display" value="1">
<!-- Replace "business" value with your PayPal Email Address or your Merchant Account ID -->
<input type="hidden" name="business" value="your PayPal Email Address or your Merchant Account ID">
<!-- Replace value with the web page you want the customer to return to -->
<input type="hidden" name="shopping_url" value="http://www.yourwebsite.com/Shop.html">
<input type="image" src="https://www.paypalobjects.com/en_US/i/btn/btn_viewcart_LG.gif" border="0" name="submit" alt="PayPal - The safer, easier way to pay online!">
<img alt="" border="0" src="https://www.paypalobjects.com/en_US/i/scr/pixel.gif" width="1" height="1">
</form>
<!-- End of View Cart Button Code -->
<!-- END BUTTON EXAMPLES -->
<!-- END SAMPLE CODE SECTION -->
<br><br>
<br><br><br><br>
<hr align="left" width="50%" noshade>
<br><br>
NOTES:
<br>
In order to test the code, you must replace the "business" value variable with your PayPal Email Address or your Merchant Account ID.
</body>
</html>
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