If you increase the withdrawal percentage you need a smaller amount to "support" your retirement, so the years to retirement gets smaller. This model does not appear to say anything about how many years of retirement you will have. A higher withdrawal percentage very likely means you have a shorter retirement, which in turn likely means you run out of money. You should just leave the percentage set at 3-4% and use a different model (on another site - they don't appear to have another one here) to figure out the whole picture. Or consider using a different model somewhere else in the first place. Fidelity or Vanguard or Bank of America or ...(the list is long) have better retirement calculators.
If you increase the withdrawal percentage you need a smaller amount to "support" your retirement, so the years to retirement gets smaller. This model does not appear to say anything about how many years of retirement you will have. A higher withdrawal percentage very likely means you have a shorter retirement, which in turn likely means you run out of money. You should just leave the percentage set at 3-4% and use a different model (on another site - they don't appear to have another one here) to figure out the whole picture. Or consider using a different model somewhere else in the first place. Fidelity or Vanguard or Bank of America or ...(the list is long) have better retirement calculators.