Alternative payment service Square is getting tougher on its merchants. Starting February 1, Square will eliminate its monthly flat rate pricing in favor of a per transaction fee. Square lets ...

The payment processing startup just announced plans to end its monthly, $275 flat fee for small businesses processing up to $250,000 in sales annually (roughly $21,000 in sales per month).

Mobile payments service Square has launched new $275 per month flat-rate pricing for small businesses, a move that could save those merchants a lot of dough on credit card transactions.