For those of you who are self-employed, a sole trader or in a partnersip, you can buy a tax certificate to pay tax early. You get interest on the advance payment, though at a lower rate than the usual personal savings rates.
For further information please click here.
If you are a limited company and want to pay your Corporation Tax bill before it is due (9 months and 1 day after your year end) then you could receive an interest rate of 4.75% on all company tax paid before the due date. If you estimate your tax bill and over estimate so that you pay too much, you will also receive interest on any overpayment at 4% from the due date to the date you receive the refund.