These gaps lead to the first two questions addressed in this work: (1) How does sorbent degradation affect the DAC carbon footprint and cost of CO2 capture? (2) Do the capacity fade (loss) rate and form (e.g., linear, exponential) affect the optimal replacement time? To answer these, we developed a capacity fade economic model for DAC. The model can be used for any sorbent and contactor combination, but we focused our analysis on amines supported in structured contactors in a temperature vacuum swing adsorption process.