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Learning, Sharing, and Teaching => Ask a Mustachian => Topic started by: Scotland2016 on December 20, 2018, 12:54:42 PM

Title: He's FIRE'd, I'm not. How do we calculate our time to total FI?
Post by: Scotland2016 on December 20, 2018, 12:54:42 PM
Hello! I love the Time to FI calculator, but our situation is less straightforward and I'm not sure how to calculate our time to FI. I would love to create an Excel spreadsheet or something, but I am not mathematically inclined. Is there a calculator out there somewhere that can help?

Here are our details:

Me (35) and Husband (53)
My annual income: \$43,000
Husband's annual income: \$12,000 (He is FIRE'd and has a very small business. Mostly takes care of the house/kids.)
Amount we take OUT of our investments per year: \$36,000
Amount we put IN our investments per year (through my mandatory retirement): \$12,470
Current annual spending: \$84,765
Total investments: roughly \$755,000

Thank you in advance for any suggestions!
Title: Re: He's FIRE'd, I'm not. How do we calculate our time to total FI?
Post by: 4alpacas on December 20, 2018, 01:20:47 PM
In order to retire at your current level of spending (~\$85k), you'll need a little over \$2.1M.  Right now, you're not saving anything (\$36k out of investments and \$12k into investments).  If you assuming 3% inflation and 8% interest on your investments, then you could retire in about 36 years.

**edited to update my numbers due to a math error!
Title: Re: He's FIRE'd, I'm not. How do we calculate our time to total FI?
Post by: dandarc on December 20, 2018, 01:22:28 PM
I'm a bit confused by your numbers, and there really isn't enough info, but the general advice is 25X your expenses - so a shade over \$2 million dollars would be the goal. At 5% (conservative estimate of real return, assuming you've got mostly stocks in your portfolio), I'm getting on the order of 35 years if you continue to net withdraw \$24K.

Of course, within 35 years you'll both reach social security eligibility, which could cover a substantial portion of your spending. And if you get 7% real instead of 5%, you're looking at more like 22 years. And most people's expenses go down in retirement.

I played around with this one to get those approximate figures.:
https://www.bankrate.com/calculators/savings/savings-withdrawal-calculator-tool.aspx (https://www.bankrate.com/calculators/savings/savings-withdrawal-calculator-tool.aspx)
Title: Re: He's FIRE'd, I'm not. How do we calculate our time to total FI?
Post by: Scotland2016 on December 20, 2018, 01:54:58 PM
In order to retire at your current level of spending (~\$85k), you'll need a little over \$2.1M.  Right now, you're not saving anything (\$36k out of investments and \$12k into investments).  If you assuming 3% inflation and 8% interest on your investments, then you could retire in about 36 years.

**edited to update my numbers due to a math error!

Thank you! So to get to that number, how did you factor in the roughly \$24,000 annual withdrawals?
Title: Re: He's FIRE'd, I'm not. How do we calculate our time to total FI?
Post by: Scotland2016 on December 20, 2018, 02:00:35 PM
I'm a bit confused by your numbers, and there really isn't enough info, but the general advice is 25X your expenses - so a shade over \$2 million dollars would be the goal. At 5% (conservative estimate of real return, assuming you've got mostly stocks in your portfolio), I'm getting on the order of 35 years if you continue to net withdraw \$24K.

Of course, within 35 years you'll both reach social security eligibility, which could cover a substantial portion of your spending. And if you get 7% real instead of 5%, you're looking at more like 22 years. And most people's expenses go down in retirement.

I played around with this one to get those approximate figures.:
https://www.bankrate.com/calculators/savings/savings-withdrawal-calculator-tool.aspx (https://www.bankrate.com/calculators/savings/savings-withdrawal-calculator-tool.aspx)

Thank you! I really like the calculator. It helps a lot.

Can I clarify anything on our numbers? I make \$43,000 a year and put a mandatory 14.5% (\$6,235) into retirement, which brings my pay down to \$36,765. My employer adds another \$6,235 to my retirement, for a total of \$12,470. We need about \$84,765 per year until some large child-related expenses go away, so \$84,765-\$36,765-\$12,000= \$36,000 which we take out of investments.

Yes, our investments are mostly stocks. We aren't eligible for Social Security.
Title: Re: He's FIRE'd, I'm not. How do we calculate our time to total FI?
Post by: 4alpacas on December 20, 2018, 02:06:05 PM
In order to retire at your current level of spending (~\$85k), you'll need a little over \$2.1M.  Right now, you're not saving anything (\$36k out of investments and \$12k into investments).  If you assuming 3% inflation and 8% interest on your investments, then you could retire in about 36 years.

**edited to update my numbers due to a math error!

Thank you! So to get to that number, how did you factor in the roughly \$24,000 annual withdrawals?
I used an 8% increase on your investments and annually inflated your spending (with included the increased withdrawals) by 3%.
Title: Re: He's FIRE'd, I'm not. How do we calculate our time to total FI?
Post by: MDM on December 22, 2018, 08:46:41 PM
You might try one or more of the calculators mentioned at Best and/or Recommended Retirement Calculator - Bogleheads.org (https://www.bogleheads.org/forum/viewtopic.php?t=115839#p1686175) and links therein.
Title: Re: He's FIRE'd, I'm not. How do we calculate our time to total FI?
Post by: CCCA on December 22, 2018, 09:35:16 PM
You might try to use the FIRE calculator that I made:
https://engaging-data.com/fire-calculator/

If there are things that you find lacking in this or other calculators, please let me know as I'm always looking for ways to improve upon the calculator.