simpletaxcalculator.app
About Simple Tax Calculator
Simple Tax Calculator is an independent US tax calculator platform built to make tax estimation practical, transparent, and accessible. We cover sales tax, capital gains, property tax, gas tax, inheritance tax, and self-employment tax — with state-specific rates sourced directly from official government sources.
The platform is operated by Kobina, a software and digital service company based in Stockholm, Sweden.
Important: This platform is provided for informational purposes only and does not constitute tax, legal, or financial advice. Always consult a qualified tax professional for your specific situation.
How our calculators are built
Every calculator on this platform follows a structured review process combining professional financial oversight, verified data research, and rigorous technical implementation.
Tax rate data is collected from official state and federal sources — Department of Revenue websites, IRS publications, and official tax tables.
Calculation methodology is reviewed and validated internally before development begins.
Technical implementation is developed and tested by our engineering team.
Financial logic and assumptions are reviewed by an experienced accounting and financial compliance professional.
Calculators are monitored and updated when authorities publish rate changes.
We do not rely exclusively on third-party aggregators for rate data. Where available, each calculator page links directly to the relevant official source so users can verify rates independently.
Our team
Talha Mansoor, FCCA
Lead Financial Reviewer
Talha is a Fellow of the Association of Chartered Certified Accountants (FCCA) and a certified Financial Modeling & Valuation Analyst (FMVA) with over 15 years of experience in statutory compliance, financial controllership, and international accounting across more than 30 jurisdictions.
His career includes roles as Audit Executive at Ernst & Young, Statutory Compliance Accountant at Google, Statutory Compliance Manager at Pure Storage, and International Financial Controller at Cardinal Health — giving him direct experience with multi-jurisdiction tax compliance, statutory audit, and financial reporting under IFRS, US GAAP, and multiple local GAAP frameworks.
Talha reviews the financial logic, tax assumptions, and calculation methodologies used across our calculator suite, ensuring our rate data and formulas reflect real-world tax practice.
Ray Alamian
Data Research Contributor
Ray contributes to tax data collection, source verification, and structured data management for the platform. His background includes data reporting systems, compliance processes, and operational data analytics, with experience at Siemens Energy and Siemens Gamesa Renewable Energy.
His role focuses on cross-referencing tax rate data against official Department of Revenue publications, identifying rate changes, and maintaining the accuracy of our state and county-level datasets.
Saeed Davari
Technical Architect
Saeed is a senior software developer and solutions architect and is responsible for the technical architecture, calculation logic, infrastructure, and ongoing maintenance of the platform.
Additional contributors: Tax data research, data verification, and software development are also supported by a broader group of freelance contributors. These individuals work under the same editorial standards as our core team.
Contact
General inquiries and editorial questions:
contact@simpletaxcalculator.appEditorial Policy · Last reviewed: May 2026