Why I Built This
I spent years working in IT, and like most people, I dreaded tax season. Not because taxes are inherently complicated — but because every time I tried to estimate what I owed, I couldn't find a tool that actually showed me the math. Most calculators spit out a single number with no explanation of how they got there. That bothered me.
So I built MyTaxCalcs.com: a collection of free U.S. tax calculators that don't just give you an answer — they show you the taxable income, the deductions applied, the effective rate versus the marginal rate, and the step-by-step breakdown behind every result. My background is in technology, not tax law, which is exactly why I prioritize clarity over jargon.
What MyTaxCalcs Covers
The site currently includes six core federal calculators and state income tax calculator pages for all 50 U.S. states and D.C.:
- Federal Income Tax Calculator — estimates your 2025/2026 federal tax, refund, or balance due based on income, filing status, and deductions
- Tax Refund Calculator — helps you estimate whether you'll owe or receive a refund before you file
- Self-Employment Tax Calculator — calculates SE tax (Social Security + Medicare) and the deductible half
- Capital Gains Tax Calculator — estimates tax on stocks, real estate, and crypto at short- and long-term rates
- Sales Tax Calculator — calculates sales tax for any U.S. state, with combined state + local rates
- Payroll Tax Calculator — estimates take-home pay, withholding, and FICA contributions for W-2 employees
Our Methodology
Every calculator on this site uses standard, publicly documented formulas sourced directly from IRS publications and official government tables. Here's what that means in practice:
- Tax brackets come from IRS Revenue Procedures published each fall (e.g., Rev. Proc. 2024-61 for 2025 tax year figures).
- Standard deduction amounts are pulled from IRS inflation adjustment announcements.
- Self-employment tax is calculated at the statutory 15.3% rate on 92.35% of net self-employment income, per IRS Schedule SE methodology.
- Capital gains rates use the IRS-published 0%, 15%, and 20% thresholds adjusted annually for inflation.
- State income tax data is sourced from each state's Department of Revenue or equivalent agency.
We do not use proprietary "black box" formulas. If you want to verify any result, you can follow the same math using IRS Publication 505, Schedule SE, or your state's official tax instructions.
Our Trust Promise
What MyTaxCalcs Is Not
MyTaxCalcs does not provide tax, legal, accounting, or financial advice. We are not a CPA firm, a tax preparation service, or a licensed financial advisor. The calculators on this site are educational tools for estimation purposes. Every taxpayer's situation is different — always consult a qualified professional for advice specific to your circumstances.
The Calculator Network
MyTaxCalcs is part of a small family of free financial calculator sites, all independently built and maintained — not affiliated with any financial institution, insurance company, or tax preparation service:
- MyInsuranceCalcs.com — free insurance calculators and guides
- MyLoanCalcs.com — free loan and mortgage calculators
- MyPctCalculator.com — free percentage calculators for everyday math