The monarchy is a long-standing British institution that enjoys high visibility across the world. However, there is concern that younger generations in the United Kingdom are losing attachment to the monarchy and increasingly support its abolition. However, it could also be that diffuse support for the monarchy increases as people gain experience with it (age effect) or from time-specific factors (period effects). To adjudicate between these possibilities, we estimate age, period, and cohort effects on support for continuing the British monarchy among the UK public. We find that support for continuing the monarchy increases considerably with age. Conversely, we detected few period effects, as public opinion has remained stable over time, and there is little clear evidence that support for the monarchy is lower among younger generations. These findings indicate that support for the monarchy will likely remain stable, and even increase, considering Britain’s aging population. The monarchy thus represents a valuable case for understanding how symbolic institutions persist in democratic societies despite lacking procedural fairness, accountability, or instrumental function, a pattern with implications for other non-performance-based institutions like appointed chambers, established churches, and ceremonial offices.