Adding Funds to a SIPP

Julezy101

Is it permitted to add funds at anytime in the FY to your SIPP (obviously not exceeding the limit of your earnings)?  I currently contribute monthly and in previous years I've been adding a lump sum in late March but now I want to do that now and put it in a MMF to get the interest. The lump sum would be from savings and not from salary earnt so far which is why I am asking the question.
Thanks 

Linton

With a SIPP you can contribute cash at any time and separately buy funds from any cash in the pension at any time.  The proceeds from any funds you sell remain in the pension. There is no link between trading funds and contributions.

It does not matter where the cash for the contribution actually comes from, the only constraint is that the total contributions in a tax year satisfy the earnings and annual allowance limits.  The check against earnings is only made at the end of the tax year. You dont need to delay things until you have accumulated sufficient earnings within the tax year.

Julezy101

Thanks very much Linton

Secret2ndAccount

Linton's answer is correct and comprehensive, but just to reiterate:
You can put the money in before you earn it, as long as you are pretty sure you will eventually earn it. The check only happens once on April 5th.
So, if you have a lot of savings, and will earn 20k salary next year, you could put 10k from your savings into a SIPP on Apr 6th, and straight into a Money Market account, thereby avoiding tax on the interest. Then top up the SIPP at the end of the tax year to the extent you have income to cover it.
Self employed people generally have to make a guess at what their profits will be, and put this amount or less into a SIPP, before they get to finalise their accounts.