Groupon charges 1.8% + $0.15 per swipe for Visa/MC/D, Amex varies. Square charges 2.75% + $0.00, so the transaction amount breakeven point is $15.80 and Groupo

Groupon charges 1.8% + $0.15 per swipe for Visa/MC/D, Amex varies. Square charges 2.75% + $0.00, so the transaction amount breakeven point is $15.80 and Groupon is cheaper for amounts > 15.80, but Square is cheaper for amounts < 15.80