Korea Payroll & Tax API › part-time-pay

South Korea part-time (alba) monthly pay from an hourly wage and schedule, including weekly holiday pay, after either 3

South Korea part-time (alba) monthly pay from an hourly wage and schedule, including weekly holiday pay, after either 3.3% withholding or the four social insurances plus income tax.

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

Input

Field	Type	Required	Description
`hourlyWage`	number	yes	Hourly wage (KRW)
`hoursPerDay`	number	yes	Hours worked per day
`daysPerWeek`	number	yes	Days worked per week
`deduction`	none \| freelancer_3_3 \| social_insurance		none, freelancer_3_3 (3.3% withholding) or social_insurance (four insurances + income tax); default none

Example request

curl -X POST https://api.kkuldogu.com/v1/part-time-pay -H "content-type: application/json" \
  -d '{"hourlyWage":10320,"hoursPerDay":5,"daysPerWeek":5,"deduction":"freelancer_3_3"}'

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": "part-time-pay",
  "input": {
    "hourlyWage": 10320,
    "hoursPerDay": 5,
    "daysPerWeek": 5,
    "deduction": "freelancer_3_3"
  },
  "result": {
    "netMonthly": 1300906,
    "grossMonthly": 1345286,
    "weeklyHolidayPayMonthly": 224214,
    "weeklyPay": 309600,
    "deductions": 44380,
    "weeklyHours": 25,
    "weeklyHolidayEligible": true,
    "belowMinimumWage": false
  }
}

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