What are the differences between SHA++ and ASQ hotels, and do I need to book a hotel for my 5-day stay in Thailand as a vaccinated traveler?

If you show flight on day 5 or before it should be fine according to the FAQ.

All new TEST & GO applications must submit A proof of prepayment for 2 separate nights of accommodation at government-approved hotel/s, such as, SHA Extra Plus (SHA++), AQ, OQ, or AHQ on Day 1 and Day 5, and the expenses for 2 RT-PCR tests on Day 1 and Day 5. The prepayment for Day 1 must include an accommodation, a test and a prearranged transfer from the airport to the hotel.

Travellers can book 2 different hotels for the accommodation on Day 1 and Day 5. However, on both Day 1 and Day 5, they must stay within the room for the RT-PCR test result.

A SHA ++ hotel mean this hotel has a private hospital agreement for both test and quarantine

I'm not sure you can even get a Thailand pass without booking the 5th day quarantine. You need the Thailand pass to even board the plane

I came and payed around 1k bath for sha++. You can even find cheaper. Just use the agoda quarantine page, I even found places around 5-600 bath. In December tho

You will most likely need an antigen test done for your flight home, that will run you 900 baht. So your not really skipping out on taking a second test. Now if you use the 5th day SHA hotel's test as your departure test, say leave on day 7 or 8 then the SHA hotel is really 900 baht cheaper and gives you a few extra days on the ground.

My husband and I just done with our Test & Go day 1. The cheapest options now cost around 6-7k thb per person for Test & Go day 1 and day 5 scheme. If you are staying for just a night you should be able to find option around 4-5K thb. Ofc, there will be risks & more cost if u r tested positive tho.

The difference between Sha+ and Sha++ is that Sha++ is the Sha+ hotel with direct collaboration with hospital. They need to send hospital staff to test you. Upon arrival, we were taken to hospital directly to get tested before checking in at hotel. If negative, my hotel guarantee results after 8-12 hours and we r free to go.

Suggest you take a look at new insurance rules ,if you test positive and you do not have certain symptoms then you have to pay all costs of isolation yourself. Strongly suggest now is not an opportune time for financially challenged people to consider International travel.

This may only give you 3 full days in Thailand. Not worth the costs and risk of quarantine if test positive on arrival.

Why bother going.

I remember it says on the website where you apply for travel pass that if your stay is shorter than 5 days you don't need to book the 5th night in the Sha extra hotel.

No just book what you think and get on the plane happy travels

That really does not make sense. You are leaving the country after day five? Why bother coming?