A large deposit can make people nervous, especially when the amount crosses $10,000. The common assumption is simple: deposit more than that and the bank automatically reports you to the IRS.
That is not quite how the rule works. Banks do have reporting obligations for certain large cash transactions. They also have to report some activity that appears suspicious, even when it falls below $10,000. The important distinction is what kind of money is moving through the account and why the transaction is being made.
