Abstract Bipolar membranes in forward bias have the potential to address several challenges of alkaline zero‐gap CO 2 electrolyzers. However, the inevitable gas evolution of CO 2 at the membrane junction typically leads to delamination and failure of the membrane after a few hours, limiting its applicability in electrolyzers so far. In this work, a bipolar membrane with a perforated anion exchange layer is presented that allows the CO 2 gas to flow back to the cathode and thus preventing accumulation of gas at the junction. This configuration for the first time enables stable operation of a forward bias bipolar membrane showing a degradation rate of 0.5 mV h −1 in a 200 h constant current hold at 100 mA cm − 2 and 3.1 V. Highest reported energy efficiency of EE CO = 39% and Faradaic efficiency of FE CO = 96% at 200 mA cm − 2 among forward bipolar membranes prove that the perforated membrane does not compromise efficiency. A maximum CO 2 single‐pass conversion of 52% at 0.75 mL CO2 min −1 cm − 2 and a low specific energy consumption of 665 kJ mol −1 CO 2 shows that this concept is superior not only to other bipolar membranes in the literature, but potentially also to conventional anion exchange membrane‐based electrolyzers.