Use the following checkpoints to compare your real options before signing contracts, buying insurance or applying for a visa.
The benchmark: Bangkok versus Ho Chi Minh City
Numbeo's 2026 composite cost-of-living-plus-rent indices are 31.6 in Bangkok and 21.4 in Ho Chi Minh City. They are relative indices, not USD monthly budgets.
Alternative: Chiang Mai versus Da Nang
The same regional table shows 24.0 for Chiang Mai and 19.4 for Da Nang. Air quality, weather and legal stay options are as important as the gap.
The immigration difference
Thailand advertises a Destination Thailand Visa and retirement-related categories, whereas Vietnam's official e-visa covers at most 90 days and does not itself create residency.