Zakat and mortgages

Question:
On the matter of zakat she has a mortgage which she is currently
paying off, but is confused about how to deduct the amount she owes.
She follows the Hanafi madhab and asfar as we understand from previous
questions on Sunnipath it is preferable for her to take only into
consideration the debt which is immediately owed rather than the total
mortgage.
However she is confused as to what this immediate debt is and she does
not know if she needs to deduct what she owes over the year orfor a
lesser period. As we have never had a mortgage or loan we do not know
how repayments work so would be grateful if you could help us with
this insha'Allah. Would it make a difference if she had an interest
only mortgage or a repayment mortgage?
We have another question related to zakat which we would be grateful
to receive an answer to. If one delays their zakat and a few months
have passed beyond the zakat date, when one resolves to pay zakat,
should one evaluate their financial circumstances at the present time,
or at the time of the zakat date, months earlier?
Answer:
In the Name of Allah, MostCompassionate, Most Merciful
1. On the day you are going to discharge your Zakat, deduct the amount
which is immediately owed which is the monthly instalment.
It would not make a difference if she had a interest-only mortgage or
repayment mortgage.
2. One will evaluate their financial circumstances at the time of the
Zakat designated date months earlier.

And Allah knows best