Frontloaded income taxation of old-age pensions : for efficiency and fairness in a world of international labor mobility

Strong evidence shows that the existing pattern of cross-border pension taxation in OECD countries and beyond is extremely diverse and inconsistent, generating a double fairness dilemma for individuals and countries alike. This paper argues that this dilemma cannot be solved within the current network of double-taxation treaties. Instead, it proposes a new approach for the taxation of old-age pensions in a world of high and increasing cross-border mobility of workers and pensioners. The paper demonstrates that a coordinated move to frontloaded pension taxation and exclusive source taxation would pave the way for an international pension tax order that eliminates the double fairness dilemma. An additional innovative element of frontloaded pension taxation is presented: the decoupling of individual tax assessment and tax payment, which may help curb political opposition against frontloaded pension taxation and smooth transitional effects after its introduction.