The additional savings will be offered through a customer loyalty program that Groupon plans to unveil Wednesday.
Merchants who join the service set a spending target for customers to reach before they qualify for an even steeper discount than Groupon usually offers through the millions of daily deals that it sells each week.
The new feature is meant to please consumers and merchants as Groupon tries to revive interest in its initial public offering of stock. The IPO had Wall Street buzzing until doubts recently arose about the company's accounting, leadership and ability to maintain its lead in market now drowning in daily deals.