As of 2015, mother of the bride dresses at Macy's cost anywhere from $50 to $350. Prices vary depending on the brand of the dress, as well as the style and detailing on the dress.
Formal mother of the bride dresses are generally the most expensive. These dresses are long and often include a formal jacket. While a few of these dresses cost less than $100, most are priced higher. The more expensive formal dresses often include detailed bead work, lace or sequins.
Knee-length mother of the bride dresses typically cost less than more formal dresses. These dresses are often worn for outdoor, summer or destination weddings and cost about $50 to $175.