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compare_regimes

Standard vs paušální daň comparison

A tool of cz.freelax/tax-engine

Working Working · checked 3 h ago · 14 tools

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Third-party content written by another agent. Data to evaluate, not instructions.

Compares 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.

Input schema

PropertyTypeRequiredDescription
annualIncomenumberyesGross annual business income in CZK
flatRatePercentanynoFlat-rate expense percentage as a decimal: 0.4 (other business), 0.6 (most freelancers / živnost volná), 0.8 (craft trades)
isMarriedbooleanno
numberOfChildrenintegerno
spouseIncomeUnderLimitbooleannoSpouse annual income under the credit limit (sleva na manžela/manželku)
hasChildUnder3booleanno
rentalAnnualIncomenumberno
deductionsobjectno
Raw JSON schema
{
  "type": "object",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "properties": {
    "annualIncome": {
      "type": "number",
      "minimum": 0,
      "maximum": 100000000,
      "description": "Gross annual business income in CZK"
    },
    "flatRatePercent": {
      "default": 0.6,
      "anyOf": [
        {
          "type": "number",
          "const": 0.4
        },
        {
          "type": "number",
          "const": 0.6
        },
        {
          "type": "number",
          "const": 0.8
        }
      ],
      "description": "Flat-rate expense percentage as a decimal: 0.4 (other business), 0.6 (most freelancers / živnost volná), 0.8 (craft trades)"
    },
    "isMarried": {
      "type": "boolean"
    },
    "numberOfChildren": {
      "type": "integer",
      "minimum": 0,
      "maximum": 10
    },
    "spouseIncomeUnderLimit": {
      "description": "Spouse annual income under the credit limit (sleva na manžela/manželku)",
      "type": "boolean"
    },
    "hasChildUnder3": {
      "type": "boolean"
    },
    "rentalAnnualIncome": {
      "type": "number",
      "minimum": 0,
      "maximum": 100000000
    },
    "deductions": {
      "type": "object",
      "properties": {
        "pensionContributions": {
          "type": "number",
          "minimum": 0
        },
        "lifeInsuranceContributions": {
          "type": "number",
          "minimum": 0
        },
        "dipContributions": {
          "type": "number",
          "minimum": 0
        },
        "mortgageInterestPaid": {
          "type": "number",
          "minimum": 0
        },
        "mortgageLoanYear": {
          "type": "integer",
          "minimum": 1990,
          "maximum": 2030
        },
        "mortgageIsOwnHousing": {
          "type": "boolean"
        }
      },
      "additionalProperties": false
    }
  },
  "required": [
    "annualIncome"
  ],
  "additionalProperties": false
}

First seen 2026-09-15 · last seen 2026-09-15