Extra Expenses are family expenses, which can be negative, meaning you make money, if you have an outstanding bailiff. If someone has super skills, family expenses may be as low as 30%, The average family expenses are at 89% of Surplus. Remember, if your wife has better skills, AND a higher leadership rating, she has the effect on family expenses. 14th century nobles were outrageous spendthrifts and the wives were often the worst offenders.