I'm pondering the same question right now. One factor is the new pension rules in the UK. I'm no expert in these matters, but have chatted to a few accountants. Since April last year, one hasn't needed to have a specific pension account. The money just needs to be ring fenced and properly audited. basically your company and you both pay as much as you can into the pension, which offsets your tax liability, and then you simply carry on trading with that pension money yourself, tax free until you finally take an income from it when you retire. At least, I think that's right. you just need to find a good accountant.