An initial investigation in seventeen marketed brands of black tea of Bangladesh (viz; Seylon, Tetley, Duncan, National, Fresh, Teer, Finlay, Starship, Ispahani, Cosmo, Magnolia, Danish, Shaw Wallace, Pusti, Kazi & Kazi, HRC and Lipton Taaza tea) randomly collected from the local supermarkets was carried out for the variation of qualitative status. The experiment was done in 2016, 2017 and 2018 for determining the active components [caffeine (CAF), total polyphenol (TP), theaflavin (TF), thearubigin (TR), theabrownin (TB), highly polymerized substances (HPS), total liquor colour (TLC), colour index (CI), briskness index (BI) and antioxidant activity (AA)]. All the studied quality parameters were found to vary significantly (P<0.05) with the marketed brands of tea. The average values of CAF, TP, TF, TR, TB and HPS in Seventeen marketed brands were determined to be 4.17%, 22.45%, 1.40%, 14.05%, 7.04% and 5.25% respectively. Whilst the average values of TLC, CI, BI and AA in the seventeen marketed brands of tea were estimated to be 4.00; 7.29; 25.28 and 86.77% respectively. The present study concludes that in relation to total active components so far studied, Lipton Taaza tea was regarded as the best one among the seventeen marketed brands of black tea of Bangladesh and all the studied brands of black tea were found to be graded in the order of Lipton Taaza> National> Kazi & Kazi> Cosmo> Duncan> Finlay> Ispahani> Shaw Wallace> Magnolia> Seylon> HRC> Tetley> Teer> Pusti> Fresh> Danish> Starship. The sequence of active components in all the studied brands of tea followed the sequence of price. The market price of all the studied brands of tea was found to be changed positively with the qualitative status.