Can I contribute to SIPP via umbrella company?

[SimonMac]

I'm with Nasa and looking to contribute/do salary sacrifice into a SIPP but they (Nasa) want to charge me £20 a month for the privilege because of their software blah. Is this normal or am I being (even more) fleeced (than normal)?

I am with NASA and they didn't charge me anything for my SIPP contributions

[Paralytic]

I am with NASA and they didn't charge me anything for my SIPP contributions

I believe, with NASA, the cost (from zero to £x) depends on who the pension provider is and whether they have an existing integration/relationship with them. ie. if it requires additional manual effort for them each month, there's a charge.