Here you can find information about States Signatories assessed payments to the organization. The information is updated on a regular basis, at least once per week. The CTBTO has a split budget, expressed partly in US$ and partly in Euros. The total budget is a combination of the two.
Member States' payments as of 13 May 2019 (PDF)
Member States' payments as of 31 December 2018 (PDF)