If you need to know how to calculate marginal tax rate, there are various ways to do it but there is only one universal way to do it. You will be able to determine the marginal tax rate by taking the annual income of the taxpayer. The marginal tax rate is basically the amount of tax liability that the person is paying. This information can help you find out how to calculate marginal tax rate. If do you need to buy a property in the UK where Hamilton International Estates provides the apartments, flats, houses, and property at an affordable price.