Spain's fourth-largest bank by market value reported a net profit of 359 million euros ($398 million) for April-June, compared with 179 million euros in the same period last year.
Analysts polled by Reuters had expected a net profit of 287 million euros.
TSB's net interest income (NII) - earnings on loans minus deposit costs - grew 9.7% year-on-year in the quarter.
Sabadell's NII in the quarter rose 30% year-on-year to 1.17 billion euros.
Domestic rival Unicaja (UNI.MC) said its net profit rose by around 6% year-on-year in the second quarter, also supported by higher financial margins.
Persons:
Spain's, Leopoldo Alvear, Alvear, Sabadell's, Unicaja, Jesús Aguado, Emma Pinedo, Miral Fahmy, Mark Potter, Susan Fenton
Organizations:
Bank, Sabadell, Reuters, British, TSB, Barclays, Thomson
Locations:
MADRID, Sabadell, Spain