Bug in calculation
I put in the following values:
Current annual income: 434782
Current annual savings: 334782
Current annual expenses: 100000
Current savings rate: 76% (calculates automatically)
Current portfolio value: 850000
It says I can retire in 4.3 years. If I add ONE dollar to annual income and recalculate it says i can retire in 3.8 years with a 78% savings rate. That's a huge jump for 1 dollar.
As another example if I put in 400,000 for income it now says I can retire in 4.1 years. Meaning that making over 30,000 less would result in an earlier retirement date.
Increasing: "Withdrawal rate" reduces the "You can retire in" time.
How could it be?
Similarly, changing income from 98,000 to 100,000 with static expenses of 48,000 (so savings increasing by 2,000 annually with 100,000 in income) increases the years until retirement from 11 to 11.1.