Landlord expenses inc mortgage interest - self assessment

GoRay

Hi all, completing my final self assessment as I sold my flat and had enough of being an accidental landlord. 

I’m adding 20% of my mortgage interest payments to this box in the self assessment ( - Residential property finance costs ). but it doesn’t seem to make a difference to the amount t owed. Should I put in the full amount of interest I paid for HMRC to the reduce to 20%?

I think I’m doing something wrong as I’ve never had to pay more than £500 tax for the self assessment on my old flat yet the calculation is currently showing that I owe £1200 in tax for an adjusted property income of £2813. Seems really steep. 

I’ve claimed for repair work, factor costs, buildings insurance, gas check and some travelling expenses. Anything I am missing? My tenant paid their own utility and council bills. 

Many thanks

Nomunnofun1

You enter the full interest - not 20%. 20% of this amount will be reflected in the calculation. 

See note 44:

https://assets.publishing.service.gov.uk/media/65f97803703c42001a58ef12/SA105_Notes_2024.pdf

Mr.Generous

Deduct gas safe, electric testing and landlord insurance too.

saajan_12

It asks for your non financing expenses (eg the items Mr.Generous mentions and more). 
It separately asks for your financing expenses (eg the mortgage interest). 

For both, its the amounts actually expended, not the tax on it.