[amluto]

In certain areas of the institutional finance world, everyone seems to accept that everyone's math is allowed to differ by a few cents, and they tally up the errors and move on with their lives.

I would, however, by quite surprised if my personal bank account did this.

[SJC_Hacker]

When the bank owes you money, they round down.

When you owe the bank money, they round up.

[walthamstow]

Unless you work for the bank, in which case your annual salary is divided by 12 and rounded up for a monthly figure.