Projected Benefit Obligation (PBO) Love Machine 14 years ago Projected Benefit Obligation (PBO) Also refer to accumulated benefit obligation. Technique to evaluate liability of pension plan on date of calculation. Assumption is that plan is continuing without end in near future.Recommended for you:ABO – Accumulated Benefit ObligationDefined Benefit PlanPension Benefit Guaranty Corporation (PBGC)Projected Maturity Date