10.5% inflation price increase NOT 9.3%

[#1]

Hello, I understood that my Plusnet monthly charges (for Unlimited Fibre Extra + Line Rental) should be seeing a 9.3% increase due to inflation, yet the monthly charges on my latest statement (Billing Date: 4-April) show a 10.5% increase:

Previous months' bills: £27.18

Latest bill: £30.03

Percentage increase: (30.03-27.18)/27.18 = 10.5%

This seems like an error (perhaps the calculations don't fully take account of the discounts applied to my account?). If it is an error, please can it be corrected?

Thanks.

[#2 · Accepted solution]

@noticeto 

The price increase was applied on the 31st March. If you do the sums you might find that the increase includes the time from that date, that is, a back charge as well as the increase for your coming month.

[#3]

Hi Baldrick1,

Thanks for the quick reply, and I think that's the answer! 

Got the calculator out, and the difference in what I was billed and what I expected is accounted for precisely by a back charge for the inflationary increase on those 4 days between 31-Mar and 4-Apr.

Cheers.