marginal tax rate - Robuta Search

https://www.nerdwallet.com/taxes/learn/marginal-tax-rate-what-it-is-and-how-to-calculate-it

Your marginal tax rate is the highest tax rate you will pay. Learn more about how to determine it.

https://www.ffmbank.com/calculator/tax-margin

Knowing your income tax rate can help you calculate your tax liability for unexpected income, retirement planning or investment income.

https://www.equitableonline.com/calculator/tax-margin