How much do you need roughly to retire?

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A short and succinct formula to figure out the lifestyle you want and find out how much that costs monthly is:

Assuming your base minimum is $4k/month, this means that you need $48k/year ($4k/month x 12 months).

Based on trinity studies of 4% base withdrawal rate, you will need to take you base yearly target ($48k) divided by 4%, which means you need to accumulate $1.2m either by investing and compounding (this depends on your earn rate, save rate, invest rate and returns-on-investment rate).

Refer to my early retirement case studies.

For some lucky ones, you may inherit money / trust or some may strike lottery, but as this is more based on luck, favor and randomness which is typically out of our control, I do not want to comment on such matters


  1. With a 60/40, 40/60 bond/equity portfolio, there’s a 97.5 chance that if you withdraw 4% annually that the portfolio will perpetually last ie last forever
  2. If you’re like me, you may want more room for buffer and errors, you can add safety buffers based on % eg additional 10, 20, 30 or more percentages to the amount you need to accumulate.

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