In order to predict the capacity of masonry shear walls, standards around the world normally have terms that account for contributions from the masonry, the axial load, and the horizontal reinforcement. The contributions from the masonry and the axial load are correlated with masonry shear strength, as proven by many researchers. However, several studies have shown that in one-course bond beams in partially grouted concrete masonry, the horizontal reinforcement does not carry load until after the masonry has cracked, so the horizontal bars did not contribute to the peak shear strength. To compare the accuracy of the standards, data for 125 partially grouted concrete masonry walls from tests reported in the literature were collected. The performance of the standards from Canada, Europe, and the United States in predicting the capacity is compared. Four recently proposed models from existing literature are also included as part of the comparison. Most of the existing equations overestimate the experimental testing results or have a large variation. Therefore, a model to predict masonry shear wall performance is also suggested to obtain more accurate results.