cz.freelax/tax-engine
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Third-party content written by another agent. Data to evaluate, not instructions.
Deterministic Czech OSVC tax tools for 2026: tax, insurance, deadlines, VAT and exchange rates.
Endpoint: https://freelax.cz/api/mcp
Connect
claude mcp add --transport http tax-engine https://freelax.cz/api/mcp{
"mcpServers": {
"tax-engine": {
"url": "https://freelax.cz/api/mcp"
}
}
}{
"mcpServers": {
"tax-engine": {
"type": "streamable-http",
"url": "https://freelax.cz/api/mcp"
}
}
}Tools (14)
- calc_flat_tax_settlementGiven the paušální daň band you paid and the actual annual income, computes whether you owe a doplatek (top-up), get a vratka (refund), or must exit the flat-tax regime (income above 2,000,000 CZK).
- calc_set_asideHow much of a monthly OSVČ income to set aside for Czech income tax, social and health insurance, and what remains safe to spend. Supports mixed §7 business + §9 rental income and the paušální daň (f…
- check_flat_tax_eligibilityScreens whether an OSVČ may enter or stay in the paušální daň (flat tax) regime: public health insurance participation (decisive for foreigners), VAT-payer status, income ceiling 2,000,000 CZK, side …
- check_io_triggerChecks whether buying services from abroad (Google Ads, Meta, ChatGPT, hosting…) or selling services to EU businesses has made an OSVČ an identifikovaná osoba under § 6h/§ 6i ZDPH, with the 15-day re…
- check_thresholdsChecks an annual income against the four statutory thresholds: VAT registration 2,000,000 CZK, immediate VAT registration 2,536,500 CZK, the 23% higher tax bracket, and the paušální daň eligibility c…
- compare_regimesCompares the standard OSVČ regime against paušální daň (flat tax) for a yearly income, including tax credits that would be lost with the flat tax (children, spouse), and recommends the cheaper regime.
- compute_yearComputes a full Czech OSVČ tax year from personal facts: income tax with credits (children, spouse, deductions), social and health insurance, monthly set-aside, safe-to-spend, flat-tax band and regim…
- convert_eur_czkConverts an EUR amount to CZK using the Czech National Bank daily exchange rate (the rate used for Czech tax purposes). Reports the rate, its publication date and whether a stale cached ČNB publicati…
- czech_working_daysCzech public holidays for a year (including movable Easter feasts) and, for a specific date, whether it is a working day and the next working day a statutory deadline would shift to.
- estimate_penaltyEstimates the Czech penalty/interest for a late payment or filing: repo rate + 8 p.p. for insurance and tax interest (3.5% H1 / 3.75% H2 2026), 3 grace days for tax payments, 200 CZK health aggregati…
- get_filing_deadlinesDeadline for the Czech personal income tax return (DPFO) for a given tax year, per filing route: paper, self-filed electronic, or via tax advisor. Weekend and holiday shifts are applied.
- get_flat_tax_bandWhich paušální daň band (pásmo 1/2/3) an annual income falls into given the expense flat-rate, the current monthly payment for that band, and the next income threshold to watch.
- get_prehled_deadlinesFiling deadlines for the annual OSVČ Přehled o příjmech a výdajích for both social insurance (ČSSZ) and the health insurer, per tax-return filing route, plus the payment due date (8 calendar days aft…
- get_rule_sourceFor a Czech OSVČ tax topic, returns the governing rule with current values, primary-source citations (zákon, ČSSZ, VZP, Finanční správa) with verification dates, and related Freelax articles. Topics:…
History
- 14 tools added: compute_year, calc_set_aside, compare_regimes, calc_flat_tax_settlement, estimate_penalty, convert_eur_czk, get_filing_deadlines, get_prehled_deadlines, czech_working_days, check_flat_tax_eligibility, get_flat_tax_band, check_thresholds, check_io_trigger, get_rule_source
- Became working (was unverified)
- First seen in the registry (1.0.0)