What is taxable income?

Taxable income is the amount of income subject to tax after all allowable deductions and adjustments, and it serves as the basis for calculating tax liability. For professional service firm owners, understanding taxable income helps with tax planning, as reducing it directly reduces taxes owed.

Key characteristics

• Income subject to taxation

• Calculated after deductions

• Basis for tax calculation

• Different from gross income

• Can be managed through planning

• Reported on tax return

Why it matters for professional service firms

Taxable income determines tax owed. Every dollar of taxable income reduction saves taxes at your marginal rate. Professional service firm owners should understand what constitutes taxable income and implement strategies to legally minimize it through deductions, retirement contributions, and timing.

Real-world example

David's business generated $380,000 gross income. Taxable income calculation: gross income $380,000, minus business expenses $142,000, minus retirement contributions $58,000, minus health insurance $18,000, minus other deductions $24,000, equals taxable income $138,000. Understanding the path from gross to taxable income revealed additional planning opportunities worth $12,000 in tax savings.