Thanks a lot for your replies.

To Avinash Nk: Not solving my issue because the change is applied for all currencies. In our business we use 4 currencies and the only one we do not need decimals is the KRW (won).

To Paresh W:  Not solving my issue. The Decimal Place field is right below the Rounding Factor field and it is not possible to directly set it. When changing the value from 0.010000 to 1.000000 in the Rounding Factor Field, the value from the Decimal Place field automatically changes from 2 to 0. 

Not sure whether it relates to the listed problem, but I had similar issue with KRW when using groupby sum on a tree view. There were useless decimals on the grouped value. This was the code I was using:

in python code: teacher_salary = fields.Monetary(compute="_compute_stats", store=True)​
in xml code: field name="teacher_salary"​

I changed it to this and it worked:

in python code: teacher_salary = fields.Float(compute="_compute_stats", store=True, digits=(14, 0))​
in xml code: field name="teacher_salary" widget="monetary"

been 4 yrs, still not improve it. Shame.

Hi: There is another field "Decimal Places" on the res.currency form. The default value of this field is 2. You may want to change this to 0.

Hi,

Activate Developer mode.

Go to Settings --> Technical --> Database Structure --> Decimal Accuracy

There you can find Product price record.

Change the value of field Digits to 0

Thanks