Tax status for ADB Consultant in Singapore (1-year contract) – 183-day rule?

Hi everyone,

I’ve recently received a consulting offer from the Asian Development Bank (ADB) to be based in their Singapore office. The contract runs for approximately 1 year (July 2026 to July 2027), of which i will need to spend about 230 intermittent days in Singapore.

My home country does not have a tax treaty with Singapore. I have a few specific questions regarding tax liability and residency:

Singapore Tax Exemption: My understanding is that ADB personnel (including consultants/experts) are exempt from Singaporean income tax under the International Organisations (Immunities and Privileges) (Asian Development Bank) Order 2020. Does this exemption hold even if I exceed the standard 183-day residency threshold?

Administrative Process: For those who have worked for the ADB in Singapore, what documentation did you need to provide to IRAS (Inland Revenue Authority of Singapore) to confirm your exempt status? Did the ADB provide a specific tax exemption certificate?

Banking/Housing: Does being a "Tax Resident" (due to the >183 day stay) but having "Exempt Income" cause any hurdles when opening a local bank account or signing a rental agreement?

I’d love to hear from anyone who has worked for the ADB, World Bank, or similar international organizations in Singapore. Thanks in advance!