B2B companies that have fewer taxable sales and don’t want to pay a premium for a real-time API
integration often opt for rate tables, which are less expensive, that plug into the API layer of
order-calculating software. These can be used for years and updated with new rate tables. However, it’s
likely that transactions will occasionally be off by a few pennies or dollars depending on the size of the
order and the tax rate. However, since there are no fees per transaction when using this method,
decision-makers feel that paying a little extra to make up for tax errors is a bargain.