Maximising corp tax savings

Sigol

My wife and I have 50/50 ownership in a Limited company. Throughout the year we save in the region of £25,000 for corporation tax. It just sits there at 0% interest all year. 
Ideally, I'd like to use the savings by investing in premium bonds throughout the year and then draw out just before the tax is due. I like premium bonds because they are pretty much the safest investment there is, virtually zero risk.

Can this be done using some kind of Director's loan or similar? Is this allowed? What is the tax situation regarding any winnings that come from the bonds? As long as the money is back in the account just before it is due, what's the problem? 

If this can't be done, what ways would you recommend for putting the £25k to good use throughout the year, without risking it?

eskbanker

https://www.gov.uk/directors-loans/you-owe-your-company-money explains that significant director's loans do have tax implications, but the best bet will probably be to ask your accountant about options that fit your company's circumstances.

mika_dm

Virgin Money has a saving business account which offers 0.40% interest. Not much, but better than 0%.
https://uk.virginmoney.com/business/savings/product/business-access

waveneygnome

Have a look at paying the tax early:
https://www.gov.uk/get-refund-interest-corporation-tax
You can get 0.5% interest from HMRC if you pay early (subject to certain dates from your company year end)
No risk
You do have to pay tax on the interest though - same as any other interest bearing account.