[mattlondon]

This is slightly confusing - it seems to factor in some magical S&S ISA income regardless of what amounts I put into existing S&S ISA.

I am assuming it thinks that I will always entirely fill a S&S ISA allowance each yaer in addition to pension contributions, mortgage, bills, food etc.

I think that is a bit of a flaw and I guess that means none of the figures can be trusted.

[sgb_QQ]

It assumes that you invest your surplus fully into an S&S ISA up to the annual limit. If that isn't true, you can adjust spending.

Full disclosure though, it doesn't currently support GIAs. That would typically come after you've filled a S&S ISA which doesn't apply to most people.

[Liquid_Fire]

> That would typically come after you've filled a S&S ISA which doesn't apply to most people.

Much more likely to apply to people with a high salary going for FIRE, though.