Invoice and Freelance Income Calculator

Formula and assumptions

This calculator uses only the labeled entries. Tax-specific defaults come from the centralized 2026 configuration; other rates are user-entered.

What is included

Entered income, costs, adjustments, and planning assumptions shown in the form.

What is not included

Eligibility determinations, complete return preparation, state-specific law, AMT, NIIT, capital-gains tax, and specialized limitations unless explicitly stated.

Worked example

A hypothetical independent worker enters realistic annual amounts, reviews the intermediate calculations, and treats the result as a planning range—not a filed return or guaranteed outcome.

Common mistakes

Omitting expenses, treating a planning percentage as an official rate, or assuming a deduction returns its full cost.

Records to gather

Income records, invoices, receipts, prior returns, payment confirmations, and documents supporting entered deductions or benefits.

When this calculator may not be suitable

Complex entities, multiple businesses, unusual credits, inventory, depreciation, multistate work, or specialized tax rules may require official forms and professional review.

Sources and assumptions

IRS Publication 505, IRS Topic 554, and the relevant official forms. User-entered values require independent verification.