Spain - Tax Declaration

[Carlos2876]

Hi, In the tax report issued by Airbnb, the host fee (paid by the guest to Airbnb), adds to the sum we need to compute to calculate the tax. 

Why is this? we should declare only the value of the money received, correct? in that case, we should not pay taxes over the host fee paid by the guest to Airbnb.

thanks, 

Carlos