Balance Transfer Query

PDplum

Afternoon All 
I hope this isn't a dumb question but here goes. 
I've been 0% transferring what started a large balance (>£10k) for the last few years over 3 separate cards. 
I've managed to get it down to £1100 on a Barclaycard platinum but this expires in October and neither of my Virgin money or HSBC cards will offer a transfer right now nor can i get a new offer elsewhere.  I think i can get it down to about £800 by 1st October as money is tight right now.
My question is on the interest which i unfortunately will start to pay soon.
Will i start paying interest on the £800ish which will be left or will it be on the £4500 which the original transfer was 26 months ago
Thanks

MallyGirl

you will pay interest on the remaining balance

Sandtree

If it expires in October then your November statement will be the first one with interest and it will be based on the outstanding balance since your October 2020 statement... its not like some of these Buy Now, Pay Later offers where interest is applied for the whole period if you don't pay it off before the end of the offer period.

PDplum

Sandtree said:

If it expires in October then your November statement will be the first one with interest and it will be based on the outstanding balance since your October 2020 statement... its not like some of these Buy Now, Pay Later offers where interest is applied for the whole period if you don't pay it off before the end of the offer period.

Hi Sandtree - thank you that's what i was worried about. i got stung 5 years ago on a dishwasher purchase that way and wasnt sure if it worked the same with Credit cards 

Sandtree

No worries PDplum, @MallyGirl had answered the question but thought I'd just tag on the last bit as a "for the avoidance of doubt" because it felt like where the concern was coming from.