LULU (Lululemon Athletica) WACC - GuruFocus www.gurufocus.com/term/wacc/LULUPrivate View The calculated TTM tax rate is limited to between 0% and 100%. If the calculated tax rate is higher than 100%, it is set to 100%. If the calculated tax rate is less than 0%, it is set to 0%. The latest calculated TTM Tax Rate = 625.545 / 2175.735 = 28.75%. Lululemon Athletica 's Weighted Average Cost Of Capital (WACC) for Today is calculated as: