Private Pensions? Do they count as savings or income?

Hi,

I'm wondering whether putting money into a private pension would count as 'savings' or 'income' as far as claiming benefits are concerned.

My income is below 8k per year, my savings are below 5k...(I live very frugally).

If I put say £25 a month into a pension scheme, would I have to declare it as income or savings?

Thanks