Korea Payroll & Tax API › daily-worker-tax

South Korea daily (day-labor) worker tax

South Korea daily (day-labor) worker tax: income tax after the KRW 150,000 daily deduction and 55% credit, local tax and employment insurance, for wages paid daily or in one lump sum.

Price: $0.01 USDC per call over REST (x402 on Base, no API key). MCP: free as daily_worker_tax at https://api.kkuldogu.com/mcp. Basis year: 2026.

Input

Field	Type	Required	Description
`dailyWage`	number	yes	Daily wage (KRW)
`days`	integer		Days worked; default 1
`paidDaily`	boolean		Paid each day (true) or in one lump sum (false); default true
`employmentInsurance`	boolean		Deduct employment insurance 0.9%; default true

Example request

curl -X POST https://api.kkuldogu.com/v1/daily-worker-tax -H "content-type: application/json" \
  -d '{"dailyWage":200000,"days":10}'

Without payment this returns 402 with x402 payment requirements; an x402 client pays $0.01 USDC and retries.

Example response

{
  "basisYear": 2026,
  "currency": "KRW",
  "disclaimer": "For reference only, not legal or tax advice. Uses official 2026 Korean rates and the same formulas as the kkuldogu.com calculators; actual payroll, NHIS/NPS notices and tax settlement can differ.",
  "source": "https://kkuldogu.com",
  "tool": "daily-worker-tax",
  "input": {
    "dailyWage": 200000,
    "days": 10
  },
  "result": {
    "net": 1967200,
    "gross": 2000000,
    "incomeTax": 13500,
    "localIncomeTax": 1300,
    "employmentInsurance": 18000,
    "netPerDay": 196720
  }
}

For reference only, not legal or tax advice. Uses official 2026 Korean rates and the same formulas as the kkuldogu.com calculators; actual payroll, NHIS/NPS notices and tax settlement can differ. · Calculators for people (Korean): kkuldogu.com · API home · llms.txt · OpenAPI