A box trifecta is a type of trifecta bet where the bettor selects a number of runners (3 or more) to fill the 1st, 2nd and 3rd places. The beauty of a box trifecta is that the runners can finish in any order so long as they fill the first 3 places. The catch is that ta box trifecta is likely to cost more than a normal trifecta, depending on the number of selections.
A flexi bet trifecta allows the bettor to only pay a certain percentage of the trifecta cost in return for the same percentage dividend. For example, if the bettor wanted to place a box trifecta for 7 runners, the cost would be $210. However, the bettor could place a flexi bet and only pay for 20% of the trifecta and pay $42.
The example shows that all 6 horses were ‘boxed’ for the trifecta, meaning that as long as they filled the first 3 places (in any order) the bet would be successful. The cost of the trifecta is calculated by multiplying the number of selections in each leg eg. 6 x 6 x 6 = $216 for a $1 unit. It would be possible to put the trifecta on for a 50c unit, this would halve the cost ($108) but would also halve the winning dividend.
Like the trifecta, all of the leading bookmakers now offer box trifecta betting and match the dividend paid out by the Tab.