Korea Payroll & Tax API › new-parent-benefits

Everything a South Korean household receives around a birth, in one call

Everything a South Korean household receives around a birth, in one call: maternity leave pay (90/120 days, who pays what), parental leave benefit month by month (normal, 6+6 both-parents, or single-parent scheme), the spouse's 20-day childbirth leave pay, and government cash support for the child (first-meeting voucher, parent benefit, child allowance to age 9).

Price: $0.10 USDC per call over REST (x402 on Base, no API key). MCP: paid-only — the MCP tool returns payment instructions. Basis year: 2026.

Input

Field	Type	Required	Description
`birthDate`	string	yes	Birth or due date (YYYY-MM-DD)
`monthlyOrdinaryWage`	number	yes	Monthly ordinary wage of the parent taking maternity leave (KRW)
`multipleBirth`	boolean		Twins or more (120 days); default false
`priorityCompany`	boolean		Employer is a priority-support (SME) company; default true
`parentalLeaveMonths`	integer		Months of parental leave after maternity leave; default 12, 0 for none
`parentalLeaveMode`	normal \| both_parents \| single_parent		normal (default), both_parents (6+6 scheme; needs the spouse fields) or single_parent
`spouseMonthlyOrdinaryWage`	number		Spouse's monthly ordinary wage; adds the spouse's childbirth leave pay (KRW)
`spousePriorityCompany`	boolean		Spouse's employer is a priority-support company; default true
`spouseParentalLeaveMonths`	integer		Months of parental leave the spouse takes; default 0
`firstChild`	boolean		First child (voucher KRW 2,000,000; later children 3,000,000); default true
`area`	capital \| non_capital \| depopulation_preferred \| depopulation_special		Residence area for the child allowance amount; default capital
`daycare`	boolean		Child attends daycare (parent benefit replaced by the daycare subsidy); default false

Example request

curl -X POST https://api.kkuldogu.com/v1/new-parent-benefits -H "content-type: application/json" \
  -d '{"birthDate":"2026-11-13","monthlyOrdinaryWage":3500000,"spouseMonthlyOrdinaryWage":4000000}'

Without payment this returns 402 with x402 payment requirements; an x402 client pays $0.10 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": "new-parent-benefits",
  "input": {
    "birthDate": "2026-11-13",
    "monthlyOrdinaryWage": 3500000,
    "spouseMonthlyOrdinaryWage": 4000000
  },
  "result": {
    "totals": {
      "leavePayAndBenefits": 35362201,
      "childBenefitsUntilAge9": 30800000,
      "all": 66162201
    },
    "maternityLeave": {
      "leaveDays": 90,
      "employerPaidDays": 60,
      "total": 9200000,
      "employerPaidPeriod": 7000000,
      "remainingPeriod": 2200000,
      "fromEmploymentInsurance": 6600000,
      "fromEmployer": 2600000
    },
    "parentalLeave": {
      "total": 23100000,
      "self": {
        "monthly": [
          {
            "month": 1,
            "amount": 2500000,
            "cap": 2500000
          },
          {
            "month": 2,
            "amount": 2500000,
            "cap": 2500000
          },
          {
            "month": 3,
            "amount": 2500000,
            "cap": 2500000
          },
          {
            "month": 4,
            "amount": 2000000,
            "cap": 2000000
          },
          {
            "month": 5,
            "amount": 2000000,
            "cap": 2000000
          },
          {
            "month": 6,
            "amount": 2000000,
            "cap": 2000000
          },
          {
            "month": 7,
            "amount": 1600000,
            "cap": 1600000
          },
          {
            "month": 8,
            "amount": 1600000,
            "cap": 1600000
          },
          {
            "month": 9,
            "amount": 1600000,
            "cap": 1600000
          },
          {
            "month": 10,
            "amount": 1600000,
            "cap": 1600000
          },
          {
            "month": 11,
            "amount": 1600000,
            "cap": 1600000
          },
          {
            "month": 12,
            "amount": 1600000,
            "cap": 1600000
          }
        ],
        "total": 23100000
      }
    },
    "spouseParentalLeave": null,
    "spousePaternityLeave": {
      "leaveDays": 20,
      "total": 3062201,
      "dailyOrdinaryWage": 153110,
      "fromEmploymentInsurance": 1684210,
      "fromEmployer": 1377991
    },
    "childBenefits": {
      "total": 30800000,
      "firstMeetingVoucher": 2000000,
      "parentBenefitAge0": 12000000,
      "parentBenefitAge1": 6000000,
      "childAllowanceMonthly": 100000,
      "childAllowanceTotal": 10800000,
      "schedule": [
        {
          "stage": "age 0 (months 0-11)",
          "from": "2026-11-13",
          "to": "2027-11-12",
          "monthly": 1100000,
          "note": null
        },
        {
          "stage": "age 1 (months 12-23)",
          "from": "2027-11-13",
          "to": "2028-11-12",
          "monthly": 600000,
          "note": null
        },
        {
          "stage": "age 2 to under 9",
          "from": "2028-11-13",
          "to": "2035-11-12",
          "monthly": 100000,
          "note": "child allowance only"
        }
      ]
    }
  }
}

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