What Is My Current Cash Flow? Assess whether you are running “in the black” or “in the red” each month. You are viewing this website at a small screen resolution which doesn't support calculators. Click here to view this calculator. Related Content Roth 401(k) vs. Traditional 401(k) This calculator compares employee contributions to a Roth 401(k) and a traditional 401(k). Systematic Withdrawals in Retirement Taking regular, periodic withdrawals during retirement can be quite problematic. Federal Income Tax Use this calculator to estimate your income tax liability along with average and marginal tax rates.