The simulations in this tool are actually done in real dollars, so the inflation rate should have no impact. But that isn't 100% true because if you expect any nominal future cash flows, i.e. those in today dollars, you have to discount those back into real numbers. For example, increased medical or in-home care expenses will cause a net increase of either $1,000 or $2,000 in expenses. Since they are expenses or outflows, please note that the numbers are now negative.