About ClaruSite

Built for Speed, Accuracy, and Independence

ClaruSite was founded by passionate software engineers and finance analysts with a clear goal: to replace clunky, ad-saturated, and outdated calculators with modern, privacy-focused interactive tools.

Every major financial milestone in the United States — whether buying your first home with a 30-year fixed mortgage, evaluating a job offer with state-by-state paycheck deductions, or planning for early retirement (FIRE) — involves complex math. Our mission is to make those numbers immediately accessible, completely free, and delightfully simple to understand.

Unlike traditional financial portals, we never require sign-ups, subscriptions, or invasive personal financial disclosure. Your numbers stay strictly in your browser.

Our Editorial & Mathematical Standards

Every tool on ClaruSite is rigorously tested against official formulas and published guidance from trusted US institutions:

• Federal & State Taxes: Modeled after official Internal Revenue Service (IRS) tax brackets, standard deduction schedules, and state revenue department guidelines.
• Mortgages & Amortization: Powered by standard Consumer Financial Protection Bureau (CFPB) compliant loan amortization formulas including PMI thresholds and property tax estimators.
• Labor & Overtime: Aligned with Fair Labor Standards Act (FLSA) regulations and Bureau of Labor Statistics (BLS) economic benchmarks.

We continuously audit our calculation engines at the start of each tax year and whenever statutory federal or state thresholds change.