Ireland VAT Guidelines

The calculation method is based on Revenue guidelines:

VAT Treatment of Restaurant and Catering Services: Combination Meal Deals (Reference: Section 4.1.1).

https://www.revenue.ie/en/tax-professionals/tdm/value-added-tax/part03-taxable-transactions-goods-ica-services/Services/services-vat-treatment-of-restaurant-and-catering-services.pdfwww.revenue.ie

Mixed supplies of goods and services: How the rates of VAT are applied under the current rules (Reference: Section 3).

https://www.revenue.ie/en/tax-professionals/tdm/value-added-tax/part06-rates-and-exemptions/mixed-supplies-of-goods-and-services/rates-mixed-supplies-of-goods-and-services.pdfwww.revenue.ie