How much does text messaging on a T-Mobile cost?

This is accurate and current as of the date of this answer. Rates are quoted in US Dollars. T-Mobile USA offers three different types of messaging plans. Unlike other mobile providers, T-Mobile's messaging plans are bundled and include all types of messages (text, picture, video, and IM). $0.20 per additional domestic message in the United States. Unlimited Domestic Messages, $14.99 per month Any 400 Domestic Messages, $4.99 per month Any 1000 Domestic Messages, $9.99 per month