The WHO is funded over a two-year cycle. Countries pay a mandatory contribution based on the size of their economy, and can make additional voluntary contributions. Around 80% of the WHO's total budget comes from voluntary contributions from countries, foundations and the private sector — most of which is ring-fenced for a specific WHO program or initiative.
| Rank | Donor | Total contribution 2020-21 | Voluntary contribution |
|---|---|---|---|
| 1st | Germany | 90% | |
| 2nd | Bill & Melinda Gates Foundation | 100% | |
| 3rd | United Kingdom | 92% | |
| 4th | U.S.A. | 60% | |
| 5th | European Commission | 100% | |
| 6th | GAVI Alliance | 100% | |
| 7th | Japan | 60% | |
| 8th | China | 33% | |
| 9th | Rotary International | 100% | |
| 10th | World Bank | 100% | |
| 24th | Russia | 63% |
