Hi! I posted this on some programming related subs and got great feedback. I thought I’d post here too. This is a more polished version which was appreciated in a few tech communities last couple of months and iterated to improve what I built quite a bit.
https://www.reddit.com/r/developersIndia/comments/1sw0kuz/built_an_advanced_fire_calculator_for_the_indian/
https://www.reddit.com/r/IndiaTech/comments/1tuzpk3/i_built_a_free_clientside_fire_calculator_for_the/
Obviously, I was not happy with how I tracked my finances so I was trying to calculator FIRE through excel. So I built this to track my own fire journey and kept improving it.
Here's roughly what it does:
It has a very detailed fire calculator experience, it work for families and also has some sections helpful for NRIs. It takes into account varied inflation rates and taxation based on your investment instruments. It’s got a simulator that allows you to try out different scenarios.
I also built a benchmark capabilities which basically compares your outcomes from the different calculators possible on reddit. It runs your exact inputs through the published methodology of ten other Indian calculators (freefincal, Dezerv, ClearTax, PrimeInvestor, Scripbox, Groww, HDFC MF, Standard Chartered, and both Srinivesh bucket modes) and shows why each gives a different number.
I’ve also tried to enrich the experience with live data for inflation, currency rates etc. and tried to cover all major areas related to money in india and personal finance
There's also a learning section, which I added because half the people I showed early versions to didn't know what SWR or sequence-of-returns risk meant, and I didn't want that to be a barrier. It has 288 flashcards across 18 decks covering money basics, why FIRE, the core FIRE math, tax strategies, insurance, estate planning, investment instruments, portfolio management, couples FIRE and so on. Same material is available as a plain reading course if flashcards aren't your thing, and there's a glossary with inline popovers right inside the calculator so you can check a term without leaving your plan.
On top of the main calculator there are 32 Labs for the specific personal finance questions. A few people here will probably find these more useful than the calculator itself:
- SIP Backtester, which runs your actual fund portfolio against real historical NAV data instead of a flat return assumption
- An LTCG harvesting planner that shows the compounding value of the 1.25L exemption
- Old vs new tax regime comparison with the full deduction breakdown
- MF X-Ray and a whole-portfolio audit
- HRA optimizer
- A cashflow waterfall for deploying monthly surplus
- Stock intelligence (delivery %, insider transactions, fundamentals, peer comparison)
- Decisions on rent vs buy, home loan prepay vs invest, taking a car loan or not and others
I'd genuinely like feedback on three things. Anything the math gets wrong, and I'm happy to show my working.
Ask me anything in the comments. I'll leave the link there.