About toools4us.com
Free, private, no-signup calculators for US salary, paycheck, and tax planning — built to give accurate answers without asking anything of you in return.
Sarah Al-Dossary
Founder & Lead Financial AnalystI built toools4us.com because I kept running into the same problem: most online calculators felt like an afterthought — thin on explanation, vague about their assumptions, or quietly built to funnel visitors toward a paid product. My background sits at an unusual intersection for this kind of work — a business degree that taught me how payroll, tax withholding, and personal finance actually function, and a separate diploma in programming that let me build the tools myself instead of outsourcing the logic to someone else.
Every calculator on this site was built from scratch, runs entirely in your browser, and sends nothing to a server — what you type stays on your device. I cross-checked the federal withholding and tax bracket logic against official IRS Publication 15 and current-year tax tables, and I update the figures whenever new IRS guidance is released.
I'm not a US citizen and I don't pretend otherwise. What I bring instead is a genuine outside interest in getting the math right, a technical background to build tools that actually work, and enough respect for the people using this site to be upfront about what these calculators can and can't tell you.
Our Approach
Built, not bought
Every calculator is original code written specifically for this site — not a rebranded plugin or a copy-pasted widget.
Sourced, not guessed
Tax brackets, contribution limits, and withholding rules are checked against official IRS publications and updated as new guidance is released.
Private by design
Every calculation runs client-side in your browser. Nothing you enter is transmitted, logged, or stored anywhere.
Honest about limits
Every result comes with a clear disclaimer — these are estimates for planning, not a replacement for a licensed tax professional.
Education & Credentials
Bachelor of Business Administration (BBA)
Diploma in Computer Programming
Both are accredited public universities in the Kingdom of Saudi Arabia.
Why This Combination Matters
A calculator is only as good as the person who built it understands both sides of the problem: the financial logic and the code that runs it. A business background means I understand what a pay stub, a tax bracket, or a 401(k) match actually represents in practice — not just as an abstract formula. A programming background means I can implement that logic directly and verify it line by line, instead of relying on a template or a third-party plugin I don't fully understand.
- Withholding logic verified against official IRS Publication 15
- Tax bracket data uses current federal figures, not outdated defaults
- Figures reviewed and updated annually as the IRS releases new guidance
What This Site Covers
Salary & Paycheck
Hourly conversions, take-home pay, overtime, bonuses
Retirement
401(k), IRAs, pensions, Social Security, FIRE
Tax
Income tax, refunds, capital gains, brackets
Loans
Mortgage, auto, personal, student, debt payoff
Investing
Compound interest, dividends, ETF returns
What You Can Expect From This Site
Get in Touch
Have a question, found an error, or just want to say hello?
Email us at: info@toools4us.com
We typically respond within 24-48 hours.