What is a tax bracket?

A tax bracket is an income range taxed at a specific rate within a progressive tax system, where higher income is taxed at higher rates. For professional service firm owners, understanding tax brackets informs planning decisions about income timing, deductions, and entity structure.

Key characteristics

• Income range with a specific rate

• Progressive system

• Higher income is taxed more

• Marginal rate applies to the last dollar

• Different for filing status

• Indexed annually for inflation

Why it matters for professional service firms

Tax brackets determine the value of deductions and the cost of additional income. Deductions save taxes at your marginal rate. Professional service firm owners should know their bracket to evaluate planning opportunities and understand the true cost of taxable income.

Real-world example

Lisa's taxable income was $380,000 (married filing jointly). Tax brackets applied: first $23,200 at 10%, next $71,100 at 12%, next $96,750 at 22%, next $153,950 at 24%, remaining $35,000 at 32%. Marginal rate: 32%. A $10,000 deduction saved $3,200 (32%). Understanding bracket-guided year-end planning decisions.