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Application de la théorie de la taxation optimale à l’impôt québécois

Author

Listed:
  • Pier-André Bouchard St-Amant
  • Nicolas Bolduc
  • Judelin Michel Ducatel
  • Guillaume Dumais

Abstract

On December 8, Finance Minister Eric Girard will present an economic and fiscal update. Will the promises of tax cuts made during the recent election campaign materialize? Any exercise to revise the tax system must balance the goals of redistributive justice and economic growth. In a context where the government wants to help taxpayers cope with inflation, but maintains its objectives of returning to a balanced budget, the choices are difficult. In this report, Pier-André Bouchard St-Amant and his co-authors rely on the economic theory of optimal taxation and make recommendations for Quebec. Their analyses and simulations show that the priority should be lower effective marginal tax rates for taxpayers earning between $30,000 and $50,000. A zero-cost reform could imply an increase in the tax shield tax credit offset by an increase in tax rates for higher-income taxpayers. Tout exercice de révision du système d’impôt doit mettre dans la balance les objectifs de justice redistributive et de croissance économique. Dans un contexte où le gouvernement veut aider les contribuables à faire face à l’inflation, mais maintient ses objectifs de retour à l’équilibre budgétaire, les choix sont difficiles. Dans ce rapport, Pier-André Bouchard St-Amant et ses coauteurs s’appuient sur la théorie économique de la taxation optimale et font des recommandations pour le Québec. Leurs analyses et simulations montrent que la priorité devrait être une baisse des taux marginaux effectifs d’imposition pour les contribuables qui gagnent entre 30 000 $ et 50 000 $. Les auteurs suggèrent qu’une bonification du crédit d’impôt du bouclier fiscal compensée par une augmentation des taux d’imposition pour les contribuables aux revenus plus élevés permettrait une réforme à coût nul.

Suggested Citation

  • Pier-André Bouchard St-Amant & Nicolas Bolduc & Judelin Michel Ducatel & Guillaume Dumais, 2022. "Application de la théorie de la taxation optimale à l’impôt québécois," CIRANO Project Reports 2022rp-21, CIRANO.
  • Handle: RePEc:cir:cirpro:2022rp-21
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    File URL: https://cirano.qc.ca/files/publications/2022RP-21.pdf
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    Keywords

    Optimal taxation; reforms; tax rates; income; Taxation optimale; réformes; taux d’imposition; revenu;
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