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

Complete
Ireland → IR
Item Name Destination Amount Conditions
Meal & Lodging Tehran, Iran 1509517.5 IRR per night Paid in addition to the vouched cost of bed and breakfast, reimbursed at vouched actual cost per Appendix 2 of Circular 07/2017 (destination-specific accommodation figure carried in that appendix, not repeated here); the amount shown is the supplement covering remaining meals and expenses for a 24-hour absence abroad on official business.
Vouched Accommodation (VA) Rate Tehran, Iran 2264276.25 IRR 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 Tehran, Iran 1509517.5 IRR per day Ten-hour rate: applies to an absence abroad of ten hours or more without an overnight stay.
Daily allowance Tehran, Iran 754758.75 IRR per day Five-hour rate: applies to an absence abroad of between five and ten hours.
Meal & Lodging All Other, Iran 1207614 IRR per night Paid in addition to the vouched cost of bed and breakfast, reimbursed at vouched actual cost per Appendix 2 of Circular 07/2017 (destination-specific accommodation figure carried in that appendix, not repeated here); the amount shown is the supplement covering remaining meals and expenses for a 24-hour absence abroad on official business.; Applies to locations in Iran other than those separately listed in Appendix 2 of Circular 07/2017.
Vouched Accommodation (VA) Rate All Other, Iran 1811421 IRR 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 Iran other than those separately listed in Appendix 2 of Circular 07/2017.
Daily allowance All Other, Iran 1207614 IRR per day Ten-hour rate: applies to an absence abroad of ten hours or more without an overnight stay.; Applies to locations in Iran other than those separately listed in Appendix 2 of Circular 07/2017.
Daily allowance All Other, Iran 603807 IRR per day Five-hour rate: applies to an absence abroad of between five and ten hours.; Applies to locations in Iran 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.