There are two deadline requirements to consider:
For all CRS taxpayers the deadline for filing the CRS-1 Form online, including remitting any tax due via electronic check or credit card payment, must be completed by the 25th day of the month immediately following the report period for which you are filing. If the 25th falls on a weekend or holiday, the transaction must be completed on the first business day after the 25th.
For special payment method taxpayers paying via automated clearinghouse deposit or fedwire transfer, the deadline for filing the CRS-1 Form is the same as for other taxpayers (see above). Note: the payment-due date may be earlier than the CRS-1 Form due date. Please consult Publication FYI-401: Special Payment Methods to ensure you meet the deadline.