The HVUT, or Heavy Vehicle Use Tax, is a yearly tax paid by truck drivers or owners of trucking companies. It ties in with drivers operating cars on our nation's highway, and use many of the money goes towards maintaining roads, alleviating congestion, keeping the roads safe, and funding new projects. Marginal tax rate may be the rate of tax not only do you on your last (or highest) number of income. In the described example, the person is being taxed with a marginal tax rate of 25% with ...