SIPP/S&S ISA platform charges - double up to save?

Mellow_gogo

I’m about to open a SIPP with Vanguard via their investor platform in one of their Target Retirement funds - opening with a lump sum of 15k then a £750 monthly contribution. 

I’m also about to use £120k from cash ISAs to open a S&S ISA, to be split between Vanguard Lifestrategy 40 & 60 funds. Opening this via the Interactive Investor platform would incur a flat monthly fee of £9.99. If I open with the Vanguard Investor platform, the charges would be a proportion of the total investment and, though low, would still work out more than the II monthly charge. 

But, would the fact of having the SIPP with Vanguard reduce the fees/charges in any way, thereby making it more prudent to use VI for both investments?

Can any good folk offer opinions on this? Thank you in advance. 

Albermarle

The vanguard charges are capped at maximum £375 pa , so you will need to get your calculator out to see if that helps you .

Eco_Miser

Mellow_gogo said:

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I’m also about to use £120k from cash ISAs to open a S&S ISA, to be split between Vanguard Lifestrategy 40 & 60 funds. Opening this via the Interactive Investor platform would incur a flat monthly fee of £9.99.

Opening on IWeb would cost £110, but absolutely nothing in future years, until you eventually spent £10 to sell up.

Mellow_gogo

Hmmm, thanks - interesting!