It depends on if you are filing as a single person or married (or jointly), and for which year you are referring to:
2017 RETURNS FILED IN 2018:
Single earning in this tax bracket $37,951 to $91,900, the tax rate is 25%.
Married/Joint earning in this tax bracket $18,651 to $75,900, the tax rate is 15%.
2018 RETURNS FILED IN 2018:
Single earning in this tax bracket $38,701 to $82,500, the tax rate is 22%.
Married/Joint earning in this tax bracket $19,051 to $77,400, the tax rate is 12%.
Hope this helps! :)