An investment system provides for multiple employers. The employers withhold payments to employees according to preferences defined by the employee. The employer forwards the withholding to an investment account manager who manages accounts for each employee. The account manager pools the withholding from the employees and invests the money in proportion to the preferences stated by the employees in the plan. Employees may change employers without affecting their accounts. Tax information may be calculated by the system to ensure accurate gratuity accounting and tax compliance on the part of the employer.