New Interactive Investor* customers can get between £100 and £3,000 cashback when opening a self-invested personal pension (Sipp) by 31 August. Interactive Investor is paying cashback in tiers, increasing to £3,000 for pots of £1.5million or more:Keep in mind that the promotion is only open to new customers who open a Sipp as their first Interactive Investor account between 1 August and 31 August. Interactive Investor's Sipp cashback tiers Deposit or transfer value Cashback £20,000 - £49,999.99 £100 £50,000 - £99,999.99 £150 £100,000 - £199,999.99 £250 £200,000 - £499,999.99 £500 £500,000 - £999,999.99 £750 £1,000,000 - £1,499,999.99 £1,000 £1,500,000+ £3,000 Source: Interactive Investor, August 2026You must also open a trading account by the end of February, although you won't necessarily need to use it – Interactive Investor will pay your cashback into this. We like that Interactive Investor pays the cashback quickly. You do need to keep your Sipp open and funded for at least 12 months, otherwise the platform may reclaim the cashback.