PBL 008 / PBL 036

Me too. Not necessarily a shortfall. PBL34 calculated interest the same way. 21-26 - 6days. Assuming interest accumulates at midnight, the last day doesnt count, but the first day does even though its potentially only part of a day as loans tend to launch in the afternoon. This does seem to be a change from previously eg PBL23, 13 which paid interest inclusive of the repayment day. Wasnt there a system upgrade recently, perhaps it was tweaked then. Could even be more accurate, calculating by the hour (then rounding).

So if I subtract today's date from tomorrow's and then subtract another 1, that equals zero for a loan part held for 1 day. That may make sense to you but it doesn't to me.

I've noticed that anomaly on the sold loans page too. It follows that the stated figure of total interest paid to investors is wrong, ie. the £2,288.22 represents 5 days interest but they actually paid out 6 days. But the figure is only ever going to be an approximation because it's clearly derived from the loan value times loan duration rather than being a summation of actual interest paid, and not all of the loan will have been earning interest on every day.

But most of the errors in actual interest paid seem to arise from the way the start date is chosen for the last interest installment of a loan part.
As an illustration of how is should work (and normally does work) we had a loan part bought on 27 Jan and sold on 2 Feb, so loan period = 6 days. The interest paid for January was for 4 days - 27 to 31 Jan, and the interest paid for February was for 2 days - 31 Jan to 2 Feb. This demonstrates that interest is not paid for the last day of the month, just as it wouldn't be paid for the day a loan part is sold.
An error occurs if - when calculating the final interest installment - instead of taking the last day of the previous month as the the start date they take the first day of the final month as the start date. If that had happened in the above example then the interest for February would only have been 1 day, and the total interest 1 day short.
That's what appears to have happened to all the March final interest installment payments, and would appear to be the problem with the PBL008 payments.

We have found that the "Loan Part Detail" page for each loan part always gives an accurate statement of loan duration and total interest earned, both during the life of a loan part and after it has been sold or repaid, so that's the easiest way to check on dubious interest payments.

I would put that difference between £9.04 and £9.02 down to rounding down of individual monthly payments. I'm not in a position to analyse the PBL008 payments as I wasn't in that loan at the end, but if other investors are saying they're 1 day short and their Loan Part Detail pages confirm it, then I would look at how the end of month / start of month dates were implemented.
It wouldn't actually make a difference if SS included the last day of the month in the normal monthly interest payments and then use the first day of the month to start the following month's interest calculation, just as long as they are consistent, but unfortunately that's not always the case.

Tagging on to this old thread (very old; boy this loan is dragging on....) instead of starting a new one. I'm just updating my DD excel sheet and can't see a Valuation document for this loan on the SS website (PBL 36).  There is a link, but it leads to nowhere.

This was before my time; was there ever a valuation document, or has it recently gone AWOL?

Thanks; but I did find that.  I'm just guessing that a new valuation report was issued for PBL 36 considering that the value of the security went from £650,000 to £450,000.........

someone presumably just ran the  Halifax (sorry 'Hbos') house price index over the numbers to get a later value.