<prompt> Human: Title explains it by itself. Hypothetically, if I save up a lot of money in cash aside from my paychecks which over time I can save up to a great amount, such as 10,000, would that be a concern to not report it to the IRS? I pay taxes automatically each bi-weekly paycheck.  <response>: You do not have an obligation to report in house savings. It is not generating interest which would be taxable and you arent investing it.Now, whenever in the future you do want to deposit a large sum of money into your bank, there will be forms the bank will send off to report a large deposit, but that is not a tax assessment. 