BARRETT BUS. SVCS DL-,01 revenue for the last year amounted to 969.43 M EUR, the most of which — 889.95 M EUR — came from its highest performing source at the moment, Professional Employer Services, the year earlier bringing 875.84 M EUR. The greatest contribution to the revenue figure was made by United States — last year it brought BARRETT BUS. SVCS DL-,01 968.80 M EUR, and the year before that — 985.12 M EUR.