Is there an upper limit for the cash in bank?

[arjan]

I have been earning 600 M+ per season. For past few seasons I noticed that my bank balance is not growing as it should have. Each season after I renew the contracts which costs me around 100-200 M the cash in my bank seems to grow at a pace, but after a few days it still grows but not the same pace which makes me wonder if there is a limit for the cash in bank. According to my experience it should be 2.15 B (which is my current bank balance), but if any one knows more please.......