@Josh-And-Tolu0
Take meter reading before your guests arrive and after they leave, that's what I used to do, and this led to some interesting findings.
1. Women used considerably more utilities then men
2. Eastern Europeans are much more frugal than their Western European equivalents
3. Two adults and a baby use much more utilities particularly gas and water than three adults and this should come as no surprise to parents, It completely goes over the head of Airbnb which does not surprise me in the least. (Airbnb does not want us to charge for infants)
BTW water readings are a good indication of the number of guests staying.
Don't forget to monitor temperature as well, I had one guest that on arrival the temperature was 20c and on her departure three days later it was 28c and she was still cold not much money made on that guest.
I record electricity, gas and water meter readings on a monthly basis for my long term letting as well.
If you feel so inclined, you should discuss with your tax authorities the way to proceed with the allocation of expenses for tax purposes as they’ve seen this all before.
What gets measured gets managed...