Discounts in magento

Question

I have a multi-seller marketplace built on magento. I need to offer discounts on the site such that:

1. Only registered users can avail the discount
2. Discount amount has an upper limit (e.g. 10% off cart value but a max discount of $100 only) that I can define

Do you think there is a plugin that addresses these requirements?

Answer 1

Promotions - > Shopping Cart Price Rules

1st Rule for 10% Discount

Condition -   if subtotal equals or less than 1000 ( for thousand 10% discount is 100 ).   

Percent of product price discount
Discount amount = 10

2nd Rule for 100 Discount

Condition -  if subtotal is greater than 1000   

Fixed amount discount for whole cart
Discount amount = 100

To enable for only logged in Users

In Rule information -> Customer Groups
Select the customer groups except NOT LOGGED IN

Answer 2

You can configure such things in magento admin panel. Goto

Promotions ->Catalog Price rules.

there you can write rules as per your wish