USD $10,000 is the amount for banks in the US - whether this comes from fincen or not I’m not sure. They also look for ‘staging’ of money deposits/withdrawals as well so as to look for patterns of NOT going above 10k. For example - you had 110K but you didnt want to trigger any checks, or so you thought, so you figured you’re break up your deposits into 9k increments. When you start depositing those 9k amounts periodically…you STILL trigger a fincen/banking alert.