A benefit of knowing the marginal tax rate is the possibility of moving that rate to a lower bracket by earning more income before year end, incurring some additional expenses before year end, slowing down production to affect the tax rate, or creating new liabilities before year end?
1) Earning more income before year end
2) Incurring some additional expenses before year end
3) Slowing down production to affect the tax rate
4) Creating new liabilities before year end