The change that was being discussed (but not yet approved, I think) was more radical and was meant to only apply to citizens: either opt out forever or stay in forever.
In this case, I confirm what @Gilgamesh wrote because it happened to me as well.
- Coverage starts from the moment you enter Taiwan. NHI is immediately notified.
- 3 months is the minimum coverage that you need to pay for each time that you visit, even if your stay in Taiwan is shorter than that.
- You have to remember to cancel your coverage once again before leaving or you will keep being charged (after the 3-month “minimum”).
- If you visit Taiwan within less than 6 months from your previous stay, you will be charged for the whole period in-between.
NHI premiums depend on your income. NT$826 was the minimum last year, but it can go up to several thousand a month. Also, I wouldn’t replace a travel insurance with NHI, which is too basic when it comes to emergencies and hospitalisation. Most Taiwanese buy a private insurance on top of their mandatory NHI contributions.