SQL Server Type: money vs smallmoney

Data type	Range	Storage
money	-922,337,203,685,477.5808 to 922,337,203,685,477.5807 (-922,337,203,685,477.58 to 922,337,203,685,477.58 for Informatica. Informatica only supports two decimals, not four.)	8 bytes
smallmoney	– 214,748.3648 to 214,748.3647	4 bytes

The money and smallmoney data types are accurate to a ten-thousandth of the monetary units that they represent. For Informatica, the money and smallmoney data types are accurate to a one-hundredth of the monetary units that they represent.

Sources:

https://docs.microsoft.com/en-us/sql/t-sql/data-types/money-and-smallmoney-transact-sql?view=sql-server-2017