If you had a high edge condition type income. by that I mean, you (and spouse) are at the very top end of the 15% bracket after you deduct your 401k, HSA, and take your 12k deduction for married fileing jointly.

~128k gross income.

- 18k x2 401k.

- 6650 HSA (~7k)

- 12k standard deductable

= 73k = 15% bracket top

Taxable net.

~128k

- 18 x2 401k

- 7k HSA

= 85k

Take home pay (missing state tax) Assuming you live in one of the 7 states with no tax while working; Texas for example.

x .85 (15% tax)

= ~$72k

https://turbotax.intuit.com/tax-tools/tax-tips/Taxes-101/States-with-the-Highest-and-Lowest-Taxes/INF23232.htmlIf you live off of a reasonable $30k yearly budget to save for FIRE.

Savings figures.

$72k - 30k = 42k

+ 18k x2 401k

+ 7k HSA

= $85k total saved+invested per year.

Say you work for longer than usual to achieve a very low SWR of 2%.

$30k / 0.02 = $1.5M. - Large,

*'safe'* total for FIRE.

Assuming a reasonable 6% returns after inflation, in today's dollars. Starting at $0 saving that $85k per year above.

http://www.moneychimp.com/calculator/compound_interest_calculator.htm13 years gets you $1,676,090.66

So you have $1.68M and retire.

Years later at 70...

So say this started at age 20 for the couple. and they still get that 6% while living off that 30k for 37 years. (today's dollars, you would adjust for inflation)

(age 20+13 = 33, taking SS at 70, 70-33 = 37 years)

Unfortunately the calculators hate a negative number here. The estimates I get say you end up with roughly $8M.

So, at 70 years old, with $8M in today's dollars. 38% of your investments are in taxable and 55% of your investments are forcing you to take 5% out (mentioned above at RMD)

- not 100% sure how RMD works. Taking that 5% at 70 for this math.

38% of 8M is ~3M.

6% growth of 3M fully Taxable = $182k

55% of 8M is ~4.4M

5% RMD of 4.4M = $220k

$182k+$220k = $402k annual income. (in todays dollars)

$400k is the 33% bracket, barely, if you make even a little more you are 35% or 39.6%.

You could split that really.

The $220k is treated at income. So that puts you in the 28% bracket.

The $182k is variable and capital gains. This would be in the 15% bracket.

You could probably stall on the capital gains, or try some kind of loss harvesting plan. But that tax is going to catch up with you eventually.

Anyway. You and your spouse would be in an awesome financial position and definitely a higher tax bracket.