Ejemplos / Boleta de venta (03)

Boleta con una línea gratuita

Boleta con una línea gravada y otra gratuita (afectación 13).

1. Entrada

El comprobante en JSON, tal como está en fixtures/03-receipt-free-line.json.

{
  "kind": "invoice",
  "ubl_version": "2.1",
  "operation_type": "0101",
  "document_type": "03",
  "series": "B001",
  "number": "3",
  "issue_date": "2026-10-15T10:30:00-05:00",
  "currency": "PEN",
  "issuer": {
    "ruc": "20123456789",
    "legal_name": "EMPRESA DEMO ORACULO S.A.C.",
    "trade_name": "DEMO ORACULO",
    "email": "facturacion@example.com",
    "telephone": "014000000",
    "address": {
      "ubigeo": "150101",
      "country_code": "PE",
      "department": "LIMA",
      "province": "LIMA",
      "district": "LIMA",
      "urbanization": "-",
      "street": "AV. EJEMPLO 123",
      "establishment_code": "0000"
    }
  },
  "customer": {
    "document_type": "1",
    "document_number": "12345678",
    "legal_name": "JUAN PEREZ QUISPE"
  },
  "totals": {
    "taxed": "50.00",
    "free": "100.00",
    "free_igv": "18.00",
    "igv": "9.00",
    "total_taxes": "9.00",
    "sale_value": "50.00",
    "subtotal": "59.00",
    "payable": "59.00"
  },
  "lines": [
    {
      "unit": "NIU",
      "quantity": "1",
      "product_code": "VEN001",
      "sunat_product_code": "10191509",
      "description": "Producto vendido",
      "unit_value": "50.00",
      "igv_base": "50.00",
      "igv_rate": "18.00",
      "igv": "9.00",
      "affectation": "10",
      "total_taxes": "9.00",
      "unit_price": "59.00",
      "line_value": "50.00"
    },
    {
      "unit": "NIU",
      "quantity": "1",
      "product_code": "PRM001",
      "description": "Producto de regalo (bonificacion)",
      "unit_value": "0.00",
      "igv_base": "100.00",
      "igv_rate": "18.00",
      "igv": "18.00",
      "affectation": "13",
      "total_taxes": "18.00",
      "unit_price": "0.00",
      "line_value": "100.00",
      "free_unit_value": "100.00"
    }
  ],
  "legends": [
    {
      "code": "1000",
      "value": "SON CINCUENTA Y NUEVE CON 00/100 SOLES"
    },
    {
      "code": "1002",
      "value": "TRANSFERENCIA GRATUITA DE UN BIEN Y/O SERVICIO PRESTADO GRATUITAMENTE"
    }
  ]
}

2. XML sin firmar

Mostrar el XML sin firmar (5,982 caracteres)

<?xml version="1.0" encoding="utf-8"?><Invoice xmlns="urn:oasis:names:specification:ubl:schema:xsd:Invoice-2" xmlns:cac="urn:oasis:names:specification:ubl:schema:xsd:CommonAggregateComponents-2" xmlns:cbc="urn:oasis:names:specification:ubl:schema:xsd:CommonBasicComponents-2" xmlns:ds="http://www.w3.org/2000/09/xmldsig#" xmlns:ext="urn:oasis:names:specification:ubl:schema:xsd:CommonExtensionComponents-2"><ext:UBLExtensions><ext:UBLExtension><ext:ExtensionContent/></ext:UBLExtension></ext:UBLExtensions><cbc:UBLVersionID>2.1</cbc:UBLVersionID><cbc:CustomizationID>2.0</cbc:CustomizationID><cbc:ID>B001-3</cbc:ID><cbc:IssueDate>2026-10-15</cbc:IssueDate><cbc:IssueTime>10:30:00</cbc:IssueTime><cbc:InvoiceTypeCode listID="0101">03</cbc:InvoiceTypeCode><cbc:Note languageLocaleID="1000"><![CDATA[SON CINCUENTA Y NUEVE CON 00/100 SOLES]]></cbc:Note><cbc:Note languageLocaleID="1002"><![CDATA[TRANSFERENCIA GRATUITA DE UN BIEN Y/O SERVICIO PRESTADO GRATUITAMENTE]]></cbc:Note><cbc:DocumentCurrencyCode>PEN</cbc:DocumentCurrencyCode><cac:Signature><cbc:ID>IDSignKG</cbc:ID><cac:SignatoryParty><cac:PartyIdentification><cbc:ID>20123456789</cbc:ID></cac:PartyIdentification><cac:PartyName><cbc:Name><![CDATA[EMPRESA DEMO ORACULO S.A.C.]]></cbc:Name></cac:PartyName></cac:SignatoryParty><cac:DigitalSignatureAttachment><cac:ExternalReference><cbc:URI>#signatureKG</cbc:URI></cac:ExternalReference></cac:DigitalSignatureAttachment></cac:Signature><cac:AccountingSupplierParty><cac:Party><cac:PartyIdentification><cbc:ID schemeID="6">20123456789</cbc:ID></cac:PartyIdentification><cac:PartyName><cbc:Name><![CDATA[DEMO ORACULO]]></cbc:Name></cac:PartyName><cac:PartyLegalEntity><cbc:RegistrationName><![CDATA[EMPRESA DEMO ORACULO S.A.C.]]></cbc:RegistrationName><cac:RegistrationAddress><cbc:ID>150101</cbc:ID><cbc:AddressTypeCode>0000</cbc:AddressTypeCode><cbc:CitySubdivisionName>-</cbc:CitySubdivisionName><cbc:CityName>LIMA</cbc:CityName><cbc:CountrySubentity>LIMA</cbc:CountrySubentity><cbc:District>LIMA</cbc:District><cac:AddressLine><cbc:Line><![CDATA[AV. EJEMPLO 123]]></cbc:Line></cac:AddressLine><cac:Country><cbc:IdentificationCode>PE</cbc:IdentificationCode></cac:Country></cac:RegistrationAddress></cac:PartyLegalEntity><cac:Contact><cbc:Telephone>014000000</cbc:Telephone><cbc:ElectronicMail>facturacion@example.com</cbc:ElectronicMail></cac:Contact></cac:Party></cac:AccountingSupplierParty><cac:AccountingCustomerParty><cac:Party><cac:PartyIdentification><cbc:ID schemeID="1">12345678</cbc:ID></cac:PartyIdentification><cac:PartyLegalEntity><cbc:RegistrationName><![CDATA[JUAN PEREZ QUISPE]]></cbc:RegistrationName></cac:PartyLegalEntity></cac:Party></cac:AccountingCustomerParty><cac:TaxTotal><cbc:TaxAmount currencyID="PEN">9.00</cbc:TaxAmount><cac:TaxSubtotal><cbc:TaxableAmount currencyID="PEN">50.00</cbc:TaxableAmount><cbc:TaxAmount currencyID="PEN">9.00</cbc:TaxAmount><cac:TaxCategory><cac:TaxScheme><cbc:ID>1000</cbc:ID><cbc:Name>IGV</cbc:Name><cbc:TaxTypeCode>VAT</cbc:TaxTypeCode></cac:TaxScheme></cac:TaxCategory></cac:TaxSubtotal><cac:TaxSubtotal><cbc:TaxableAmount currencyID="PEN">100.00</cbc:TaxableAmount><cbc:TaxAmount currencyID="PEN">18.00</cbc:TaxAmount><cac:TaxCategory><cac:TaxScheme><cbc:ID>9996</cbc:ID><cbc:Name>GRA</cbc:Name><cbc:TaxTypeCode>FRE</cbc:TaxTypeCode></cac:TaxScheme></cac:TaxCategory></cac:TaxSubtotal></cac:TaxTotal><cac:LegalMonetaryTotal><cbc:LineExtensionAmount currencyID="PEN">50.00</cbc:LineExtensionAmount><cbc:TaxInclusiveAmount currencyID="PEN">59.00</cbc:TaxInclusiveAmount><cbc:PayableAmount currencyID="PEN">59.00</cbc:PayableAmount></cac:LegalMonetaryTotal><cac:InvoiceLine><cbc:ID>1</cbc:ID><cbc:InvoicedQuantity unitCode="NIU">1</cbc:InvoicedQuantity><cbc:LineExtensionAmount currencyID="PEN">50.00</cbc:LineExtensionAmount><cac:PricingReference><cac:AlternativeConditionPrice><cbc:PriceAmount currencyID="PEN">59</cbc:PriceAmount><cbc:PriceTypeCode>01</cbc:PriceTypeCode></cac:AlternativeConditionPrice></cac:PricingReference><cac:TaxTotal><cbc:TaxAmount currencyID="PEN">9.00</cbc:TaxAmount><cac:TaxSubtotal><cbc:TaxableAmount currencyID="PEN">50.00</cbc:TaxableAmount><cbc:TaxAmount currencyID="PEN">9.00</cbc:TaxAmount><cac:TaxCategory><cbc:Percent>18</cbc:Percent><cbc:TaxExemptionReasonCode>10</cbc:TaxExemptionReasonCode><cac:TaxScheme><cbc:ID>1000</cbc:ID><cbc:Name>IGV</cbc:Name><cbc:TaxTypeCode>VAT</cbc:TaxTypeCode></cac:TaxScheme></cac:TaxCategory></cac:TaxSubtotal></cac:TaxTotal><cac:Item><cbc:Description><![CDATA[Producto vendido]]></cbc:Description><cac:SellersItemIdentification><cbc:ID>VEN001</cbc:ID></cac:SellersItemIdentification><cac:CommodityClassification><cbc:ItemClassificationCode>10191509</cbc:ItemClassificationCode></cac:CommodityClassification></cac:Item><cac:Price><cbc:PriceAmount currencyID="PEN">50</cbc:PriceAmount></cac:Price></cac:InvoiceLine><cac:InvoiceLine><cbc:ID>2</cbc:ID><cbc:InvoicedQuantity unitCode="NIU">1</cbc:InvoicedQuantity><cbc:LineExtensionAmount currencyID="PEN">100.00</cbc:LineExtensionAmount><cac:PricingReference><cac:AlternativeConditionPrice><cbc:PriceAmount currencyID="PEN">100</cbc:PriceAmount><cbc:PriceTypeCode>02</cbc:PriceTypeCode></cac:AlternativeConditionPrice></cac:PricingReference><cac:TaxTotal><cbc:TaxAmount currencyID="PEN">18.00</cbc:TaxAmount><cac:TaxSubtotal><cbc:TaxableAmount currencyID="PEN">100.00</cbc:TaxableAmount><cbc:TaxAmount currencyID="PEN">18.00</cbc:TaxAmount><cac:TaxCategory><cbc:Percent>18</cbc:Percent><cbc:TaxExemptionReasonCode>13</cbc:TaxExemptionReasonCode><cac:TaxScheme><cbc:ID>9996</cbc:ID><cbc:Name>GRA</cbc:Name><cbc:TaxTypeCode>FRE</cbc:TaxTypeCode></cac:TaxScheme></cac:TaxCategory></cac:TaxSubtotal></cac:TaxTotal><cac:Item><cbc:Description><![CDATA[Producto de regalo (bonificacion)]]></cbc:Description><cac:SellersItemIdentification><cbc:ID>PRM001</cbc:ID></cac:SellersItemIdentification></cac:Item><cac:Price><cbc:PriceAmount currencyID="PEN">0</cbc:PriceAmount></cac:Price></cac:InvoiceLine></Invoice>

3. Firma

Firmado con el certificado de prueba del repositorio, tests/vectors/test-cert/. No es un certificado de contribuyente.

DigestValue: KBjuzKzDFxwKBiwiLoPxaNCnbUY=
SignatureValue: EnUp0GoMTDdgrBHag7EsH+G2VW9pcTDGoJlZs2KZgvI3zeyVClAqN/uPprlhTQ2dRa8TQNrqL0pW+5qRzvYGT/XwawduMZJ2fM02SESgutALy0Ok8/s5PH4xBpDXL5fOTLh9NvrXI9w48v5jrHcz48TKBVktRdhPS82h6k4hxzoduaZsk9Q425RY29SLne+bM5tomwcXuc1P8sFQ9XqZ2Ori3U6t3TO4UzteAxPKXJlsgT29syPbWREGJ5sja1seaQEve7VPq8dIIdav9OjMqwVl+FVFM3QBcQEHjn9tLdPMUkWINmVn/zxE/D+u4deDNLH2gOetk8JnkPDo03s90Q==

Mostrar el XML firmado

<?xml version="1.0" encoding="utf-8"?>
<Invoice xmlns="urn:oasis:names:specification:ubl:schema:xsd:Invoice-2" xmlns:cac="urn:oasis:names:specification:ubl:schema:xsd:CommonAggregateComponents-2" xmlns:cbc="urn:oasis:names:specification:ubl:schema:xsd:CommonBasicComponents-2" xmlns:ds="http://www.w3.org/2000/09/xmldsig#" xmlns:ext="urn:oasis:names:specification:ubl:schema:xsd:CommonExtensionComponents-2"><ext:UBLExtensions><ext:UBLExtension><ext:ExtensionContent><ds:Signature Id="signatureKG"><ds:SignedInfo><ds:CanonicalizationMethod Algorithm="http://www.w3.org/TR/2001/REC-xml-c14n-20010315"/><ds:SignatureMethod Algorithm="http://www.w3.org/2000/09/xmldsig#rsa-sha1"/><ds:Reference URI=""><ds:Transforms><ds:Transform Algorithm="http://www.w3.org/2000/09/xmldsig#enveloped-signature"/></ds:Transforms><ds:DigestMethod Algorithm="http://www.w3.org/2000/09/xmldsig#sha1"/><ds:DigestValue>KBjuzKzDFxwKBiwiLoPxaNCnbUY=</ds:DigestValue></ds:Reference></ds:SignedInfo><ds:SignatureValue>EnUp0GoMTDdgrBHag7EsH+G2VW9pcTDGoJlZs2KZgvI3zeyVClAqN/uPprlhTQ2dRa8TQNrqL0pW+5qRzvYGT/XwawduMZJ2fM02SESgutALy0Ok8/s5PH4xBpDXL5fOTLh9NvrXI9w48v5jrHcz48TKBVktRdhPS82h6k4hxzoduaZsk9Q425RY29SLne+bM5tomwcXuc1P8sFQ9XqZ2Ori3U6t3TO4UzteAxPKXJlsgT29syPbWREGJ5sja1seaQEve7VPq8dIIdav9OjMqwVl+FVFM3QBcQEHjn9tLdPMUkWINmVn/zxE/D+u4deDNLH2gOetk8JnkPDo03s90Q==</ds:SignatureValue><ds:KeyInfo><ds:X509Data><ds:X509Certificate>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</ds:X509Certificate></ds:X509Data></ds:KeyInfo></ds:Signature></ext:ExtensionContent></ext:UBLExtension></ext:UBLExtensions><cbc:UBLVersionID>2.1</cbc:UBLVersionID><cbc:CustomizationID>2.0</cbc:CustomizationID><cbc:ID>B001-3</cbc:ID><cbc:IssueDate>2026-10-15</cbc:IssueDate><cbc:IssueTime>10:30:00</cbc:IssueTime><cbc:InvoiceTypeCode listID="0101">03</cbc:InvoiceTypeCode><cbc:Note languageLocaleID="1000"><![CDATA[SON CINCUENTA Y NUEVE CON 00/100 SOLES]]></cbc:Note><cbc:Note languageLocaleID="1002"><![CDATA[TRANSFERENCIA GRATUITA DE UN BIEN Y/O SERVICIO PRESTADO GRATUITAMENTE]]></cbc:Note><cbc:DocumentCurrencyCode>PEN</cbc:DocumentCurrencyCode><cac:Signature><cbc:ID>IDSignKG</cbc:ID><cac:SignatoryParty><cac:PartyIdentification><cbc:ID>20123456789</cbc:ID></cac:PartyIdentification><cac:PartyName><cbc:Name><![CDATA[EMPRESA DEMO ORACULO S.A.C.]]></cbc:Name></cac:PartyName></cac:SignatoryParty><cac:DigitalSignatureAttachment><cac:ExternalReference><cbc:URI>#signatureKG</cbc:URI></cac:ExternalReference></cac:DigitalSignatureAttachment></cac:Signature><cac:AccountingSupplierParty><cac:Party><cac:PartyIdentification><cbc:ID schemeID="6">20123456789</cbc:ID></cac:PartyIdentification><cac:PartyName><cbc:Name><![CDATA[DEMO ORACULO]]></cbc:Name></cac:PartyName><cac:PartyLegalEntity><cbc:RegistrationName><![CDATA[EMPRESA DEMO ORACULO S.A.C.]]></cbc:RegistrationName><cac:RegistrationAddress><cbc:ID>150101</cbc:ID><cbc:AddressTypeCode>0000</cbc:AddressTypeCode><cbc:CitySubdivisionName>-</cbc:CitySubdivisionName><cbc:CityName>LIMA</cbc:CityName><cbc:CountrySubentity>LIMA</cbc:CountrySubentity><cbc:District>LIMA</cbc:District><cac:AddressLine><cbc:Line><![CDATA[AV. EJEMPLO 123]]></cbc:Line></cac:AddressLine><cac:Country><cbc:IdentificationCode>PE</cbc:IdentificationCode></cac:Country></cac:RegistrationAddress></cac:PartyLegalEntity><cac:Contact><cbc:Telephone>014000000</cbc:Telephone><cbc:ElectronicMail>facturacion@example.com</cbc:ElectronicMail></cac:Contact></cac:Party></cac:AccountingSupplierParty><cac:AccountingCustomerParty><cac:Party><cac:PartyIdentification><cbc:ID schemeID="1">12345678</cbc:ID></cac:PartyIdentification><cac:PartyLegalEntity><cbc:RegistrationName><![CDATA[JUAN PEREZ QUISPE]]></cbc:RegistrationName></cac:PartyLegalEntity></cac:Party></cac:AccountingCustomerParty><cac:TaxTotal><cbc:TaxAmount currencyID="PEN">9.00</cbc:TaxAmount><cac:TaxSubtotal><cbc:TaxableAmount currencyID="PEN">50.00</cbc:TaxableAmount><cbc:TaxAmount currencyID="PEN">9.00</cbc:TaxAmount><cac:TaxCategory><cac:TaxScheme><cbc:ID>1000</cbc:ID><cbc:Name>IGV</cbc:Name><cbc:TaxTypeCode>VAT</cbc:TaxTypeCode></cac:TaxScheme></cac:TaxCategory></cac:TaxSubtotal><cac:TaxSubtotal><cbc:TaxableAmount currencyID="PEN">100.00</cbc:TaxableAmount><cbc:TaxAmount currencyID="PEN">18.00</cbc:TaxAmount><cac:TaxCategory><cac:TaxScheme><cbc:ID>9996</cbc:ID><cbc:Name>GRA</cbc:Name><cbc:TaxTypeCode>FRE</cbc:TaxTypeCode></cac:TaxScheme></cac:TaxCategory></cac:TaxSubtotal></cac:TaxTotal><cac:LegalMonetaryTotal><cbc:LineExtensionAmount currencyID="PEN">50.00</cbc:LineExtensionAmount><cbc:TaxInclusiveAmount currencyID="PEN">59.00</cbc:TaxInclusiveAmount><cbc:PayableAmount currencyID="PEN">59.00</cbc:PayableAmount></cac:LegalMonetaryTotal><cac:InvoiceLine><cbc:ID>1</cbc:ID><cbc:InvoicedQuantity unitCode="NIU">1</cbc:InvoicedQuantity><cbc:LineExtensionAmount currencyID="PEN">50.00</cbc:LineExtensionAmount><cac:PricingReference><cac:AlternativeConditionPrice><cbc:PriceAmount currencyID="PEN">59</cbc:PriceAmount><cbc:PriceTypeCode>01</cbc:PriceTypeCode></cac:AlternativeConditionPrice></cac:PricingReference><cac:TaxTotal><cbc:TaxAmount currencyID="PEN">9.00</cbc:TaxAmount><cac:TaxSubtotal><cbc:TaxableAmount currencyID="PEN">50.00</cbc:TaxableAmount><cbc:TaxAmount currencyID="PEN">9.00</cbc:TaxAmount><cac:TaxCategory><cbc:Percent>18</cbc:Percent><cbc:TaxExemptionReasonCode>10</cbc:TaxExemptionReasonCode><cac:TaxScheme><cbc:ID>1000</cbc:ID><cbc:Name>IGV</cbc:Name><cbc:TaxTypeCode>VAT</cbc:TaxTypeCode></cac:TaxScheme></cac:TaxCategory></cac:TaxSubtotal></cac:TaxTotal><cac:Item><cbc:Description><![CDATA[Producto vendido]]></cbc:Description><cac:SellersItemIdentification><cbc:ID>VEN001</cbc:ID></cac:SellersItemIdentification><cac:CommodityClassification><cbc:ItemClassificationCode>10191509</cbc:ItemClassificationCode></cac:CommodityClassification></cac:Item><cac:Price><cbc:PriceAmount currencyID="PEN">50</cbc:PriceAmount></cac:Price></cac:InvoiceLine><cac:InvoiceLine><cbc:ID>2</cbc:ID><cbc:InvoicedQuantity unitCode="NIU">1</cbc:InvoicedQuantity><cbc:LineExtensionAmount currencyID="PEN">100.00</cbc:LineExtensionAmount><cac:PricingReference><cac:AlternativeConditionPrice><cbc:PriceAmount currencyID="PEN">100</cbc:PriceAmount><cbc:PriceTypeCode>02</cbc:PriceTypeCode></cac:AlternativeConditionPrice></cac:PricingReference><cac:TaxTotal><cbc:TaxAmount currencyID="PEN">18.00</cbc:TaxAmount><cac:TaxSubtotal><cbc:TaxableAmount currencyID="PEN">100.00</cbc:TaxableAmount><cbc:TaxAmount currencyID="PEN">18.00</cbc:TaxAmount><cac:TaxCategory><cbc:Percent>18</cbc:Percent><cbc:TaxExemptionReasonCode>13</cbc:TaxExemptionReasonCode><cac:TaxScheme><cbc:ID>9996</cbc:ID><cbc:Name>GRA</cbc:Name><cbc:TaxTypeCode>FRE</cbc:TaxTypeCode></cac:TaxScheme></cac:TaxCategory></cac:TaxSubtotal></cac:TaxTotal><cac:Item><cbc:Description><![CDATA[Producto de regalo (bonificacion)]]></cbc:Description><cac:SellersItemIdentification><cbc:ID>PRM001</cbc:ID></cac:SellersItemIdentification></cac:Item><cac:Price><cbc:PriceAmount currencyID="PEN">0</cbc:PriceAmount></cac:Price></cac:InvoiceLine></Invoice>

Reproducirlo con el binario

sunat-sdk build < fixtures/03-receipt-free-line.json
# {"file_name": "...", "xml": "<XML sin firmar>"}

sunat-sdk sign --cert tests/vectors/test-cert/test-cert.pem --key tests/vectors/test-cert/test-key.pem < firma.json
# firma.json: {"xml": "<XML sin firmar de la salida anterior>"}

Los pasos completos, con los entornos y las credenciales, están en la guía de inicio.