Is VAT added on top of delivery-app commission in the UK?

Yes. Uber Eats, Deliveroo and Just Eat all list 20% VAT added on top of the fee in the UK. Check whether the percentage you are quoted already includes it.

• Uber Eats UK: VAT 20% is added to the fee.
• Deliveroo UK: VAT 20% is added to the fee.
• Just Eat UK: VAT 20% is added to the fee.
• Work it out: add the VAT to the quoted percentage to see the real cost.