The top 10 most expensive cities for expats to live in right now, according to recent surveys and studies, are as follows:

1. Hong Kong, China
2. Tokyo, Japan
3. Zurich, Switzerland
4. Singapore
5. Geneva, Switzerland
6. Shanghai, China
7. Ashgabat, Turkmenistan
8. Beijing, China
9. Bern, Switzerland
10. Seoul, South Korea

Please note that the rankings may vary slightly depending on the specific survey or study used, as the cost of living can fluctuate over time.