O-Factor is the score of a country based on the survey responses.
High numbers indicate a high degree of opacity and low numbers indicate a low degree of opacity.
Tax Equivalent shows the effect of opacity when viewed as if it imposes a hidden tax. For example, the number 30 indicates that opacity in that country is equivalent to levying an additional 30-percent corporate income tax. On average, countries with more opacity tend to have to pay a higher interest rate on the debt they issue. For example, a score of 900 would indicate that countries need to pay international investors an extra 9 percent on their sovereign debt due to opacity. Some opacity premiums in this tabulation are higher than the actual interest rate at which the corresponding country is able to borrow.