FC Bayern München could very well win their 30 German title this season. However, the club would not get a fifth star on their kits for that achievement because of two main reasons.

First, only German titles won since the Bundesliga era started (1963 to now) are counted, so Bayern just won 28 titles so far (excluding the possible 29th title in the 2019-2020 season).
Second, and more importantly, there is no rule for a club to get five stars - four stars are the maximum currently. The championship stars rule in the German Bundesliga was introduced in 2004 ahed of the 2004-2005 season.
1 Star: 3 titles
2 Stars: 5 titles
3 Star: 10 titles
4 Star: 20 titles
5 Stars: ??? - Not Defined Yet
Bayern Munich 4 Stars for 20 Bundesliga titles (28 in total), the 1932 German championship win is not counted.
Borussia Mönchengladbach 2 Stars
Borussia Dortmund 2 Stars
Werder Bremen 1 Star, 3 titles
Hamburger SV 1 Star, 3 titles
VfB Stuttgart 1 Star, 3 titles
We could well expect that the German Bundesliga will introduce a rule for the fifth star in the coming years.
Dortmund 20-21 Kits To Be Not Released At Last Home Match Of Current Season
'Stealth Look': Gladbach 20-21 Away Kit Leaked
No 5th Star for Bayern Munich

Share your thoughts in the comments below.


Bundesliga Stars Rule Explained:
First, only German titles won since the Bundesliga era started (1963 to now) are counted, so Bayern just won 28 titles so far (excluding the possible 29th title in the 2019-2020 season).
Second, and more importantly, there is no rule for a club to get five stars - four stars are the maximum currently. The championship stars rule in the German Bundesliga was introduced in 2004 ahed of the 2004-2005 season.
Bundesliga Stars Rule:
1 Star: 3 titles
2 Stars: 5 titles
3 Star: 10 titles
4 Star: 20 titles
5 Stars: ??? - Not Defined Yet
Bundesliga Teams With Stars Rule:
Bayern Munich 4 Stars for 20 Bundesliga titles (28 in total), the 1932 German championship win is not counted.
Borussia Mönchengladbach 2 Stars
Borussia Dortmund 2 Stars
Werder Bremen 1 Star, 3 titles
Hamburger SV 1 Star, 3 titles
VfB Stuttgart 1 Star, 3 titles
We could well expect that the German Bundesliga will introduce a rule for the fifth star in the coming years.
Dortmund 20-21 Kits To Be Not Released At Last Home Match Of Current Season
'Stealth Look': Gladbach 20-21 Away Kit Leaked
No 5th Star for Bayern Munich

Share your thoughts in the comments below.