Frequently asked questions
How accurate is this income tax calculator?
This is a simplified estimator using generic progressive brackets. Actual tax liability depends on your jurisdiction, specific deductions, credits, alternative minimum tax, capital gains, and other factors. Use it for quick estimates and planning, not for filing.
What is the difference between effective and marginal tax rate?
Your marginal rate is the bracket your last dollar of income falls into. Your effective rate is the total tax divided by total income — it is always lower than your marginal rate because only income above each threshold is taxed at the higher rate.
Should I take the standard deduction or itemize?
Itemize only if your qualified deductions (mortgage interest, charitable donations, state/local taxes, medical expenses above threshold) exceed the standard deduction. For most filers, the standard deduction is larger and simpler.
What are tax credits and how do they differ from deductions?
Deductions reduce your taxable income (saving you money at your marginal rate). Credits reduce your tax bill directly, dollar for dollar. A $1,000 credit saves $1,000 in tax regardless of your bracket, making credits more valuable than deductions of the same amount.
Does this include state and local taxes?
No. This calculator estimates federal-level income tax only using simplified brackets. State and local income taxes vary widely by jurisdiction. Add your state rate separately for a complete picture of your total income tax burden.
Why does my marginal rate seem high compared to what I actually pay?
Because progressive taxation means only income in that bracket is taxed at the higher rate. If your marginal rate is 24%, that applies only to income above the 22% threshold. All income below is taxed at lower rates, which is why your effective rate is much lower.