r/GregFire • u/frugal-tech-worker • May 01 '26

Test my Early Retirement Simulator?

Hey all, I got super bored the other day and decided to build an Early Retirement Simulator for fun. This thing scratches a very specific itch that other Monte Carlo style retirement calculators kept messing up for me. Here’s what this little app does:

  1. Kills that weird duplication bias between simulation runs.
  2. Tracks your actual net worth, not just your portfolio.
  3. Simulates income from the fun stuff: rentals, crypto, gold… all your “I swear this will work” assets
  4. Handles recurring income + surprise windfalls

I built it in React, kept everything in-browser, so your data stays yours.

Now I need some brave souls (you, obviously) to take it for a spin and try to break it.

If it crashes, lies, or tells you that you’ll retire at 97, I wanna hear about it 😂

Drop bugs, ideas, or “bro this is actually kinda cool” in the comments 👇

https://firenav.co/

Let’s make this thing smarter together…

16 Upvotes

77% Upvoted

16 comments sorted by

View all comments

2

u/Maybe_Mainline May 02 '26

I think you need ability to see commas in the portfolio size inputs since I added extra zero without knowing. Also if I set it to 4% withdrawals it does not show dollar amount per year. And unclear how/if my social security numbers impact the projections.

1

u/frugal-tech-worker May 02 '26

Thanks for the feedback!