• Tesco average pre-tax profit margin for 2012-02-29 was 0%, a 0% decline from 2012-08-31.
• Tesco average pre-tax profit margin for 2012-08-31 was 0%, a 0% decline from 2013-02-28.
• Tesco average pre-tax profit margin for 2013-02-28 was 0%, a 0% decline from 2013-08-31.

Pre-tax profit margin can be defined as earnings before taxes as a portion of total revenue.