How much does Square charge per transaction?

Square charges 2.6% + $0.10 for in-person card swipes, dips, and taps; 3.5% + $0.15 for manually keyed transactions; and 2.9% + $0.30 for online payments. There are no monthly fees on the free plan. Paid plans (Square Plus at $29/month) reduce rates for high-volume sellers in categories like restaurants.