CapitalGainsTax.net

Rates, rules and the tax owed

Work out capital gains tax on shares, funds, crypto, property and other assets in 218 countries and territories, from the rules each country's tax authority publishes. Ask how a country taxes gains and the answer comes from that country's rules tables: the rates for each tax year, allowances and exemptions, holding periods, how losses carry forward and when the return is due.

What you can ask

I bought 2 BTC in Germany in 2023 for €40,000 and sold them in 2025 for €110,000. What tax do I owe?
Example path ·

MCP connector

Server URL: https://capitalgainstax.net/mcp
Login: None
Protocol: MCP 2025-11-25
Instructions: Capitalgainstax.net rules and calculators for capital gains tax in 218 countries and territories, built from each tax authority's published rules. Amounts are in the country's own currency. Tax years are numbered by the calendar year they start in. Before , read the country's asset type keys and options from unless they are already known from this conversation. Where the tax depends on income and the user hasn't given theirs, calculate anyway: the result uses the country's median income (income.assumed). Tell the user, and ask for their income for the year; the card's income field recalculates, or call again with annual_income. When a result says incomeNeeded, ask for the income and call again. When the user uploads an exchange or broker export, pass its full text to as exports; pass other lists of buys and sells as transactions, every buy included: the country's own lot-matching rules price them. Give the user the calculatorUrl from a calculation: it opens the full calculator with their sales filled in, where they can edit them and download the files for their return.

Tools

Reads data3

Skills

1 in the ChatGPT listing

What you can ask

I bought 2 BTC in Germany in 2023 for €40,000 and sold them in 2025 for €110,000. What tax do I owe?

Example path ·

MCP connector

Server URL

https://capitalgainstax.net/mcp

None

Protocol

MCP 2025-11-25

Instructions

Capitalgainstax.net rules and calculators for capital gains tax in 218 countries and territories, built from each tax authority's published rules. Amounts are in the country's own currency. Tax years are numbered by the calendar year they start in. Before , read the country's asset type keys and options from unless they are already known from this conversation. Where the tax depends on income and the user hasn't given theirs, calculate anyway: the result uses the country's median income (income.assumed). Tell the user, and ask for their income for the year; the card's income field recalculates, or call again with annual_income. When a result says incomeNeeded, ask for the income and call again. When the user uploads an exchange or broker export, pass its full text to as exports; pass other lists of buys and sells as transactions, every buy included: the country's own lot-matching rules price them. Give the user the calculatorUrl from a calculation: it opens the full calculator with their sales filled in, where they can edit them and download the files for their return.