> ## Documentation Index > Fetch the complete documentation index at: https://docs.fungies.io/llms.txt > Use this file to discover all available pages before exploring further. # Calculate product price including tax > Return an indicative price for an offer including the tax that applies to a customer in the given country. Intended for storefront display (e.g. showing tax-inclusive prices on a product page). The result is a **quote**, not a settled charge: the authoritative tax is always recomputed at checkout from full billing details. Amounts are returned in the smallest currency unit (e.g. 1099 = 10.99 in a 2-decimal currency). This endpoint prices business-to-consumer (B2C) sales. B2B reverse-charge determination is deliberately out of scope and is resolved at checkout. ## OpenAPI ````yaml /api-reference/api-docs.yaml post /v0/tax/calculate openapi: 3.1.0 info: title: Fungies API v0 version: 0.3.5 servers: - url: https://api.fungies.io security: [] tags: - name: discounts description: Discounts related endpoints - name: keys description: Offer product keys related endpoints - name: orders description: Orders related endpoints - name: payments description: Payments related endpoints - name: offers description: Offers related endpoints - name: products description: Products related endpoints - name: subscriptions description: Subscriptions related endpoints - name: tax description: Tax calculation related endpoints - name: users description: Users related endpoints - name: variants description: Product variants related endpoints - name: plans description: Product plans related endpoints - name: elements description: Elements related endpoints paths: /v0/tax/calculate: post: tags: - tax summary: Calculate product price including tax description: >- Return an indicative price for an offer including the tax that applies to a customer in the given country. Intended for storefront display (e.g. showing tax-inclusive prices on a product page). The result is a **quote**, not a settled charge: the authoritative tax is always recomputed at checkout from full billing details. Amounts are returned in the smallest currency unit (e.g. 1099 = 10.99 in a 2-decimal currency). This endpoint prices business-to-consumer (B2C) sales. B2B reverse-charge determination is deliberately out of scope and is resolved at checkout. operationId: PostV0TaxCalculate requestBody: description: POST /v0/tax/calculate Request body content: application/json: schema: $ref: '#/components/schemas/PostV0TaxCalculateRequestBody' responses: '200': description: POST /v0/tax/calculate Positive response content: application/json: schema: $ref: '#/components/schemas/PostV0TaxCalculatePositiveResponse' '400': description: POST /v0/tax/calculate Negative response content: application/json: schema: $ref: '#/components/schemas/PostV0TaxCalculateNegativeResponse' examples: example1: value: status: error error: message: Sample error message security: - APIKEY_1: [] components: schemas: PostV0TaxCalculateRequestBody: type: object properties: offerId: type: string format: uuid quantity: type: integer format: int64 exclusiveMinimum: 0 maximum: 1000 default: 1 country: type: string enum: - AF - AX - AL - DZ - AD - AO - AI - AQ - AG - AR - AM - AW - AU - AT - AZ - BS - BH - BD - BB - BY - BE - BZ - BJ - BM - BT - BO - BA - BW - BV - BR - IO - VG - BN - BG - BF - BI - KH - CM - CA - CV - BQ - KY - CF - TD - CL - CN - CO - KM - CG - CD - CK - CR - CI - HR - CW - CY - CZ - DK - DJ - DM - DO - EC - EG - SV - GQ - ER - EE - SZ - ET - FK - FO - FJ - FI - FR - GF - PF - TF - GA - GM - GE - DE - GH - GI - GR - GL - GD - GP - GU - GT - GG - GN - GW - GY - HT - HN - HK - HU - IS - IN - ID - IQ - IE - IM - IL - IT - JM - JP - JE - JO - KZ - KE - KI - XK - KW - KG - LA - LV - LB - LS - LR - LY - LI - LT - LU - MO - MG - MW - MY - MV - ML - MT - MQ - MR - MU - YT - MX - MD - MC - MN - ME - MS - MA - MZ - MM - NA - NR - NP - NL - NC - NZ - NI - NE - NG - NU - MK - 'NO' - OM - PK - PS - PA - PG - PY - PE - PH - PN - PL - PT - PR - QA - RE - RO - RU - RW - WS - SM - ST - SA - SN - RS - SC - SL - SG - SX - SK - SI - SB - SO - ZA - GS - KR - SS - ES - LK - BL - SH - KN - LC - MF - PM - VC - SD - SR - SJ - SE - CH - TW - TJ - TZ - TH - TL - TG - TK - TO - TT - TN - TR - TM - TC - TV - UG - UA - AE - GB - US - UY - UZ - VU - VA - VE - VN - WF - EH - YE - ZM - ZW state: type: string maxLength: 10 postalCode: type: string maxLength: 20 required: - offerId - country PostV0TaxCalculatePositiveResponse: type: object properties: status: type: string const: success data: type: object properties: object: type: string enum: - tax_calculation default: tax_calculation offerId: type: string format: uuid quantity: type: integer format: int64 minimum: -9007199254740991 maximum: 9007199254740991 currency: type: string enum: - AFN - ALL - DZD - AOA - ARS - AMD - AWG - AUD - AZN - BSD - BDT - BBD - BZD - BMD - BOB - BAM - BWP - BRL - BHD - GBP - BND - BGN - BIF - BYN - KHR - CAD - CVE - KYD - KWD - XAF - XPF - CLP - CNY - COP - KMF - CDF - CRC - HRK - CZK - DKK - DJF - DOP - XCD - EGP - ETB - EUR - FKP - FJD - GMD - GEL - GIP - GTQ - GNF - GYD - HTG - HNL - HKD - HUF - ISK - INR - IDR - ILS - JMD - JPY - JOD - KZT - KES - KGS - LAK - LBP - LSL - LRD - MOP - MKD - MGA - MWK - MYR - MVR - MRO - MUR - MXN - MDL - MNT - MAD - MZN - MMK - NAD - NPR - ANG - TWD - NZD - NIO - NGN - NOK - OMR - PKR - PAB - PGK - PYG - PEN - PHP - PLN - QAR - RON - RUB - RWF - SHP - SVC - WST - STD - SAR - RSD - SCR - SLL - SGD - SBD - SOS - ZAR - KRW - LKR - SRD - SZL - SEK - CHF - TJS - TZS - THB - TND - TOP - TTD - TRY - UGX - UAH - AED - UYU - USD - UZS - VUV - VEF - VND - XOF - YER - ZMW - SLE - XCG - SSP - VES - MRU - STN - VED taxBehavior: type: string enum: - exclusive - inclusive amountSubtotal: type: number format: double minimum: -1.7976931348623157e+308 maximum: 1.7976931348623157e+308 amountTax: type: number format: double minimum: -1.7976931348623157e+308 maximum: 1.7976931348623157e+308 amountTotal: type: number format: double minimum: -1.7976931348623157e+308 maximum: 1.7976931348623157e+308 taxBreakdown: type: array items: type: object properties: taxType: type: - string - 'null' default: null country: type: - string - 'null' default: null state: type: - string - 'null' default: null percentage: type: - string - 'null' default: null amount: type: number format: double minimum: -1.7976931348623157e+308 maximum: 1.7976931348623157e+308 inclusive: type: boolean required: - amount - inclusive required: - offerId - quantity - currency - taxBehavior - amountSubtotal - amountTax - amountTotal - taxBreakdown required: - status - data PostV0TaxCalculateNegativeResponse: type: object properties: status: type: string const: error error: type: object properties: message: type: string required: - message required: - status - error securitySchemes: APIKEY_1: type: apiKey in: header name: x-fngs-public-key ````