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About Robin Invest

You make the investment decisions. We do the math.

Robin Invest is a free investing-tools portal for individual investors in Korea. It brings complicated, tedious calculations and scattered schedules together in one place.

Calculators

Search, and get an accurate answer right away.

From averaging down to compound interest, CAGR and position sizing, every calculation runs instantly in your browser, and your inputs are never sent to a server.

Daily data

Built to fit your morning routine.

Every day we organize dashboards for indices, exchange rates, interest rates and crypto, calendars for IPOs, ex-dividend dates, lock-ups and CBs, plus investor flows and a theme map.

Built for Korea

Tailored to Korean tax law and rules.

Overseas stock capital gains tax, comprehensive taxation of financial income and health insurance premiums, ISA and pension account comparisons, and even gifts to children. Each page shows the reference date it applies.

Our principles

  • We do not make recommendations. Robin Invest only provides data and calculation tools and does not encourage buying or selling any particular stock.
  • We state our sources and reference dates. Tax, fee and market data are always shown with their source and reference date.
  • We do not collect personal data. There is no sign-up, and calculation inputs are not stored except in the shareable link (URL).

Data sources

We use Naver Pay Securities, Upbit, the Korea Exchange, KOFIA FreeSIS, the Korea Securities Depository, KIND and DART filings, the US Federal Reserve (FRED), Yahoo Finance, individual ETF issuers, and materials from the National Tax Service, the Ministry of Economy and Finance (formerly the Ministry of Strategy and Finance) and the Ministry of Health and Welfare. Detailed sources are at the bottom of each page.