About CalcHub

CalcHub is a free tax calculator platform designed to help freelancers, gig workers, employees, and self-employed individuals easily calculate their taxes.

Our Mission

Tax calculations are complex, and tools like the IRS website are not intuitive. CalcHub provides not only accurate calculation results but also tax-saving tips and insights to help users make better financial decisions.

Expertise & Trustworthiness

The CalcHub team continuously researches US and Korean tax codes, directly analyzing official tax law documents to build our calculation engines. All calculation logic is grounded in published tax statutes and official guidelines, and we promptly update our engines when tax laws change.

Accuracy

All calculations are based on official tax laws of each country. For the US, we reference IRS Publication 334 and Schedule SE. For Korea, we reference the National Tax Service income tax rate tables. We update promptly when tax laws change.

Data Sources

• US: IRS Revenue Procedure 2025-11, IRS Publication 334, Schedule SE, State Tax Agency official data
• Korea: National Tax Service income tax rate tables (2026), Income Tax Act Enforcement Decree
• All config data is transparently available on our GitHub repository.

Disclaimer

All calculation results provided by CalcHub are for reference only and have no legal effect. Please consult a qualified tax professional or CPA for accurate tax filing. CalcHub is not responsible for any damages resulting from errors in calculation results.