Return on Investment (ROI) is the way in which the profitability of SNG tournaments are measured. This is shown as your profit per game and is expressed as a percentage of the buy-in after the rake (or fee) is removed. For example someone making an average of $.50 per game at the $1+.25 level would have an ROI of 40% ($.50/$1.25 = 40%)

To find your "average", simply play SNGS, and keep track of all costs, and winnings and number of games played.

Hourly Rate simply takes your expected ROI and number of games you play per hour and gives an average hourly 'wage' for your efforts. Using the above example an 40% ROI at the $1+.25 level and 4 games per hour would give you an hourly rate of $2. These two concepts are heavily related. Increasing the number of games per hour (by multi-tabling) may decrease your ROI but increase your overall hourly rate.

Generally speaking, the lower the level of SNG, the higher ROI you need to be profitable