This note was prepared in response to the request from the Conference of the Parties at its twenty-ninth session for the secretariat to update documents FCCC/SBI/2019/INF.4, FCCC/SBI/2019/INF.12 and FCCC/SBI/2020/INF.3. It provides updated information on standard costs associated with UNFCCC activities, including for staff salaries, official travel, workshops, meetings and document preparation, with the aim of ensuring transparency and efficiency of UNFCCC budgeting and financial planning by providing current cost estimates based on historical data and projected cost drivers such as inflation.