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

Complete
Ireland → South Dakota, United States
Item Name Destination Amount Conditions
Meal & Lodging South Dakota, USA 102.5 USD per night Paid in addition to the vouched cost of room; the amount shown is the supplement covering remaining meals and expenses for a 24-hour absence abroad on official business.; Source lists a single state rate labelled 'Dakota' covering both North Dakota and South Dakota.
Vouched Accommodation (VA) Rate South Dakota, USA 102.5 USD 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.; Source lists a single state rate labelled 'Dakota' covering both North Dakota and South Dakota.
Daily allowance South Dakota, USA 68.33 USD per day Ten-hour rate: applies to an absence abroad of ten hours or more without an overnight stay.; Source lists a single state rate labelled 'Dakota' covering both North Dakota and South Dakota.
Daily allowance South Dakota, USA 34.17 USD per day Five-hour rate: applies to an absence abroad of between five and ten hours.; Source lists a single state rate labelled 'Dakota' covering both North Dakota and South Dakota.

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.