The ecological status of the Baltic Sea has for many years been affected by the high input of both water-borne and airborne nutrients. The focus here is on the air-borne input of nitrogen (N) and the projected changes in this input, assuming the new National Emission Ceilings direc-tive (NEC-II), currently under negotiation in the EU, is ful-filled towards the year 2020. With a set of scenario sim-ulations, the Danish Eulerian Hemispheric Model (DEHM) has been used to estimate the development in nitrogen de-position based on present day meteorology combined with present day (2007) or future (2020) anthropogenic emis-sions. Applying a so-called tagging method in the DEHM model, the contribution from ship traffic and from each of the nine countries with coastlines to the Baltic Sea has been assessed. The annual deposition to the Baltic Sea is esti-mated to 203 k tonnes N for the present day scenario (2007) and 165 k tonnes N in the 2020 scenario, giving a projected reduction of 38 k tonnes N in the annual load in 2020. This equals a decline in nitrogen deposition of 19 %. The results from 20 model runs using the tagging method show that of the total nitrogen deposition in 2007, 52 % came from emis-sions within the bordering countries. By 2020, this is pro-jected to decrease to 48 %. For some countries the projected decrease in nitrogen deposition arising from the implemen-tation of the NEC-II directive will contribute significantly to compliance with the reductions agreed on in the provisional reduction targets of the Baltic Sea Action Plan. This under-lines the importance of including projections like the current in future updates of the Baltic Sea Action Plan.