The data on revenue of associations also comprise data on association branches and youth councils, and data on institutes comprise data on religious communities having the humanitarian organisation status. The data exclude the associations, institutes and foundations that have been established by the Republic of Slovenia, municipalities or other public sector entities.

In recent years, despite the economic crisis, the revenues of non-governmental organizations grew until 2020, when they were lower than the previous year for the first time. The associations revenues decreased in 2011 and 2013 compared to the previous year but have since grown and in 2016 already exceeded the level before the reductions. They increased by 3.04% in 2018, and by 6.63% in 2019, before falling by 15.56% in 2020. In 2022, they increased again by 19.36% and in 2023 by 11.89% compared to the previous year. The institutions had a decline in revenues in 2012, but already in 2013, they had higher revenues than before the crisis. In 2022, institutions had a decline in revenues again by 6.29%.  In 2023, they increased by 16.34% compared to the previous year. Foundations revenues decreased in 2011 and 2014 compared to the previous year and only in 2015 they have higher revenues than before the crisis. In 2016 and 2017, there was a drop in income at the foundations again, namely below the level of 2009, and it is only in 2018 and 2019 that it is again higher than before the crisis. In 2020, foundations had a decline in revenue, namely by a little more than 28%. In 2021, the income of foundations increased by 14.39%, and in 2022 they exceeded 2019 level. In 2023, the income of foundations increased by 43.99%, mainly due to fundraising for those affected by the floods.

Less than two thirds of all revenue of non-governmental organizations is generated by associations, followed by institutions and foundations. Even though institutions represent only 13.12% of all non-governmental organisations, they generate as much as 33.73 % of all revenue. The high share of the institutes' generated revenues is also reflected in the fact that the institutes employ more than half of all workers in the non-governmental sector.

When relating the average revenue of a non-governmental organisation to its form, the revenue is highest in case of institutes, amounting to something more than € 134,000. In 2023, the average revenue of foundations is considerably higher compared to the previous year. They generated just something less then € 103,000 euros. The average revenue of associations is considerably lower, an association generating just over € 39,000 in average revenue. The average revenue per non-governmental organization amounts to € 52,408.

Statistically speaking, on average each non-governmental organization has a little over € 52,400 in revenue annually, but the actual distribution of revenue is very much different. As much as 16.06 % of non-governmental organizations had no income in 2023, and an additional 32.40 % had less than € 5,000. Only 13.51 % of non-governmental organizations had more than € 50,000 in revenue.