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

Complete
United Kingdom → Sofia Capital, BG
Item Name Destination Amount Conditions
Meals Sofia, Bulgaria 42.5 BGN per day Over 5 hours rate: covers subsistence expenses for a period of more than 5 but less than 10 hours, measured by reference to the times of arrival in and departure from the foreign country.
Meals Sofia, Bulgaria 98.5 BGN per day Over 10 hours rate: covers subsistence expenses for a period of more than 10 but less than 24 hours, measured by reference to the times of arrival in and departure from the foreign country.
Meals and incidentals Sofia, Bulgaria 108.5 BGN per day 24 hour rate: covers the total cost of meals and daily hotel-to-office travel for a full 24-hour period.; The actual room rate is paid in addition to this amount (source shows the rate as 'plus room rate').
Lodging Sofia, Bulgaria 154 EUR per night No specific conditions
Breakfast Sofia, Bulgaria 0 BGN per meal This amount is included in the room rate, so it is not paid separately on top of the lodging rate.
Lunch Sofia, Bulgaria 38 BGN per meal No specific conditions
Dinner Sofia, Bulgaria 51.5 BGN per meal No specific conditions
Incidentals Sofia, Bulgaria 0 BGN per day Source row labelled 'Other': other expenses incurred during the day; employers may use the individual meal and other rates instead of the over 5 hour, over 10 hour and 24 hour rates.
Drinks Sofia, Bulgaria 9 BGN per day No specific conditions
Transport Sofia, Bulgaria 10 BGN per day Covers daily travel between the employee's hotel and office.
Total residual Sofia, Bulgaria 108.5 BGN per day Total residual rate: intended to cover the total cost of meals in a period of 24 hours plus the cost of daily travel between the employee’s hotel and office; the 24 hour rate is the sum of the room rate and this total residual rate.

Source URL:
https://www.gov.uk/guidance/expenses-rates-for-employees-travelling-outside-the-uk
This source provides official travel rate information from gov.uk.