Automatic Accounting for Saving & Investing

Maybe a rule or something users can turn on to indicate allocation percentages of net income to investing and savings. EX: Bob makes 10,000 after-tax monthly, in FreeBudget he wants to save 10% of all after-tax income each month, put 15% in his Roth IRA each month, etc. without having to manually input 1000 and 1500 into a new “expense” category.