Projected Benefit Obligation (PBO) Daniel Guidotti 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 Obligation Defined Benefit Plan Pension Benefit Guaranty Corporation (PBGC) Projected Maturity Date