This study, commissioned by LTO Nederland (the Netherlands Agricultural and Horticultural Association), NZO (Dutch Dairy Association) and Rabobank, calculated the effect of the expected development of the Dutch dairy farming sector if current policies are continued combined with an integrated package of measures to reduce ammonia emissions. The calculated reduction of ammonia emitted by the Dutch dairy sector in 2030 compared to 2018 amounts to 28%. The additional investment for ammonia measures in barns, water storage and land was calculated to be 1.3 billion euro at sector level. The overall effect on the financial result of dairy farms is on average -1.07 euro per 100 kg of milk. Given that on average the margins per kg of milk are narrow, this constitutes a significant impact for many farms. The package of measures evaluated in this study can be considered realistic in terms of the level of change compared to current average practice. With respect to the assumed degree of implementation, it is ambitious.