Look up per diem reimbursement rates and mileage deductions for business travel worldwide.

Complete
Ireland → Thailand
Item Name Destination Amount Conditions
Meal & Lodging Bangkok, Thailand 8407.5 THB per night Overnight rate covering accommodation and three meals for a 24-hour absence abroad on official business.
Vouched Accommodation (VA) Rate Bangkok, Thailand 4203.75 THB per night Vouched Accommodation (VA) rate: paid in addition to the vouched cost of accommodation. Per Note 2 of Circular 07/2017 the VA rate should not be routinely used except for travel to Brussels, where the vouched cost of room plus the VA rate applies to all officers on overnight visits.
Daily allowance Bangkok, Thailand 2802.5 THB per day Ten-hour rate: applies to an absence abroad of ten hours or more without an overnight stay.
Daily allowance Bangkok, Thailand 1401.25 THB per day Five-hour rate: applies to an absence abroad of between five and ten hours.
Meal & Lodging All Other, Thailand 4042.5 THB per night Overnight rate covering accommodation and three meals for a 24-hour absence abroad on official business.; Applies to locations in Thailand other than those separately listed in Appendix 2 of Circular 07/2017.
Vouched Accommodation (VA) Rate All Other, Thailand 2021.25 THB per night Vouched Accommodation (VA) rate: paid in addition to the vouched cost of accommodation. Per Note 2 of Circular 07/2017 the VA rate should not be routinely used except for travel to Brussels, where the vouched cost of room plus the VA rate applies to all officers on overnight visits.; Applies to locations in Thailand other than those separately listed in Appendix 2 of Circular 07/2017.
Daily allowance All Other, Thailand 1347.5 THB per day Ten-hour rate: applies to an absence abroad of ten hours or more without an overnight stay.; Applies to locations in Thailand other than those separately listed in Appendix 2 of Circular 07/2017.
Daily allowance All Other, Thailand 673.75 THB per day Five-hour rate: applies to an absence abroad of between five and ten hours.; Applies to locations in Thailand other than those separately listed in Appendix 2 of Circular 07/2017.

Source URL:
https://www.revenue.ie/en/employing-people/documents/dper-circular-07-2017-subsistence-allowances-abroad.pdf
This source provides official travel rate information from revenue.ie.