We examine the effect of the partner allowance (PA) in the Dutch pension system on the retirement decisions of couples using administrative data. PA was paid to people who receive the public old-age pension with a partner younger than the state pension age (SPA) and with a low own income. PA worked as a financial incentive to retire earlier, especially for the younger partners. As of 1 April 2015, new old-age pensioners are no longer entitled to this allowance. We estimate the effect of this reform on the retirement behaviour of each spouse. To account for the fact that at the same time, another reform essentially put an end to generous early retirement arrangements, we compare singles and couples. We conclude that PA substantially increased female younger partners' probabilities to exit from part-time employment into retirement close to the older partner's SPA. On the other hand, there is no evidence that male younger partners (either full-time or part-time workers) responded to the PA reform. In addition, PA increased male older partners’ probabilities to retire in the years before reaching their SPA.