The Load and Resistance Factor Design (LRFD) methods are being widely adapted for deep foundations design. The benefits of the LRFD method are two-fold: (1) that uncertainties related to the design of a deep foundation are rationally incorporated into the engineering process, and (2) that the foundation design is harmonized with the superstructure design. The key issue in the wide application of the LRFD method for foundation design is the specification of resistance factors that are appropriate for various geotechnical conditions and design criteria. In recent years, a number of agencies have been calibrating resistance factors using regional/local load test data and design methods. These calibrations have to be used carefully since the design methods are not always in consonance with the load test data interpretation methods. In addition and more significantly, little effort has been made to address the dichotomy of design at the strength and service limit states. This paper first describes the current LRFD practice and resistance factor calibration approach. A performance based design (PB-LRFD) methodology that permits concurrent calibration and design of deep foundations at both the strength and service limit states is then presented. In the PB-LRFD approach, project specific resistance factors are obtained based upon the available site assessment and load-test data. Depending upon the scope of the subsurface investigation and field load testing/verification program, the proposed methodology may be considered in three-levels. The applicability of the PB-LRFD methodology is illustrated through foundation designs that satisfy strength and service limit state criteria.