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A tax calculator designed for self-employed individuals and sole proprietors in Korea. Calculate VAT, comprehensive income tax, and national insurance contributions — all in one app. Key Features [VAT Calculation] - General taxpayer: Revenue 10% automatic calculation - Simplified taxpayer: Industry-specific value-added rates (15–40%) applied automatically - Easy comparison with a toggle between general and simplified taxpayer [Income Tax Calculation] - Quick calculation using the simplified expense rate method - Choose your industry: IT/Professional, Restaurant, Retail, Service, Construction, Manufacturing, and more - Displays income tax local income tax (10%) combined [National Insurance Calculation] - Calculates National Pension, Health Insurance, and Long-term Care Insurance for regional subscribers - View monthly payment and annual total at a glance - National Pension ceiling (6.17M KRW) and floor (370K KRW) automatically applied [User-Friendly UX] - Automatic comma formatting as you type amounts - Expandable/collapsible calculation breakdown Check your taxes before filing.