Updating post from Reddit.
So I obtained consent to let in January and my mortgage changed to a buy to let on May 1st. The January to May interest charge was just over £1,000; and around £600 from January 20th to April 5th although I have no proof because my lender only sends annual statements. How can I safely estimate the annual interest charge so I can get 20% relief from hmrc?
To answer your question, Hmrc just says you need to keep adequate accounting records, aslong as you have the mortgage agreement and the calculation you’ve used you’ll be fine.
Even though they only send you annual statements most high street lenders will give you an interest statement for the tax year if you directly ask for one though
I asked on the chat for the amount for those specific dates and they gave it to me on chat but can’t provide a statement with that exact number, they’ve sent one for the year which shows 1k for 5 months, so 3 months is there or there abouts at 600, would that be ok? I even took a screenshot of the chat with the bank
Honestly I’d just use your own calculation to find out the interest, based on loan amount * interest rate, adjusted for capital repayments each month (amortisation schedule) and you’ll be fine. - FYI you can also deduct any fees the bank charged for the mortgage when you took it out.
Even if the fees were not wholly for the BTL? Like I lived there for a while
In your calc only use the period it was a btl for.