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Sanjib Saha

Sanjib Saha retired early from software engineering to dedicate more time to family and friends, pursue personal development and assist others as a money wellness mentor. Self-taught in investments, he passed the Series 65 licensing exam as a non-industry candidate. Sanjib is the president and co-founder of Dollar Mentor, a 501(c)(3) non-profit organization offering free investment and financial education. Follow his non-profit on LinkedIn, and check out Sanjib’s earlier articles.

    Forum Posts

    Logic Check: 401(k) Loan - Paying Taxes Twice?

    29 replies

    AUTHOR: Sanjib Saha on 11/2/2025
    FIRST: Mark Crothers on 11/2   |   RECENT: R Quinn on 11/10/2025 at 6:11 AM

    Twenty-five years ago today….

    27 replies

    AUTHOR: Sanjib Saha on 3/25/2025
    FIRST: Sanjib Saha on 3/25   |   RECENT: Philip Stein on 3/30

    Comments

    • Mark, thanks for the excellent post. Your experience reminds me of a great quote from Morgan Housel: All behavior makes sense with enough information Makes You Think · Collaborative Fund

      Post: I Don’t Like to Judge…But.

      Link to comment from November 9, 2025

    • I agree. I have a question about this statement: "if the commercial loan rate was lower, you would have chosen that, right?", I'm not so sure about that. Here's why. The effective rate on the 401K loan is almost 0%, irrespective of the posted interest rate of the loan (since the interest is eventually coming back to the borrower after taxes). So, even if the 401K interest is 6% and a commercial loan is 4%, isn't the 401K loan still better, despite the higher rate of interest? Thanks for your valuable insight.

      Post: Logic Check: 401(k) Loan – Paying Taxes Twice?

      Link to comment from November 9, 2025

    • Thank you so much for the detailed explanation, BenefitJack. I really appreciate your taking the time to walk through this. I agree with your general premise that when used correctly and when there is a genuine need to take a loan, borrowing from 401K works very well for a disciplined investor with steady job, as long as the asset-allocation can be maintained in the overall investment portfolio (i.e., there is no market timing risk involved, requiring one to liquidate stock investments during downturn). I'm a bit lost on your comment: "Second, the interest you pay on your 401k loan may be tax deductible." As far as I know, 401K loan interest isn't tax deductible. If you have it handy, would you mind giving some reference (e.g. IRS guidelines or official documentation) that explains when 401K loan interest can be tax-deductible? Also, if the loan is from a 401K ROTH, then I presume that the principal and interest both will be deposited back to the 401K ROTH, and therefore there is no double-tax on the interest on a 401K ROTH loan. But I'm unclear how the interest you pay on a regular (pretax) 401K loan avoids double taxation. Are you saying that when the loan is repaid, the principal is added to the tax-deferred portion of the 401K and the interest is added in the after-tax portion of the 401K? If not, then the interest will be taxed on distribution - which leads to the double-taxation issue. I might be missing something here, and I'd appreciate if you shed some light on my doubt. Thanks in advance, BenefitJack. Irrespective of the double-taxation issue, I do see 401K loans as financially better compared to commercially available alternatives, because effectively it becomes a zero-interest loan (except the small double-tax component).

      Post: Logic Check: 401(k) Loan – Paying Taxes Twice?

      Link to comment from November 9, 2025

    • Thanks Julie. No, and that's the source of misconception.

      1. Any 401K distribution of pre-tax amount will be taxed.
      2. The $100 I got from the loan is actually equivalent of pre-tax $125 in spending power, because I get to spend that money which was never taxed. Therefore, conceptually there's a tax due on my part ($25).
      3. Repaying the money with after-tax $100 is nothing but paying that "conceptual tax" that accrued because I had spent $100 of pre-tax money, without paying any tax at all. By repaying with the after-tax $100, I'm basically putting everything back to where they were before the loan took place.
      4. From this point, rule #1 applies for any pre-tax money living in the 401K.
      Hope this clarifies.

      Post: Logic Check: 401(k) Loan – Paying Taxes Twice?

      Link to comment from November 2, 2025

    • That's a good one :). Prevent unnecessary borrowing that can backfire.

      Post: Logic Check: 401(k) Loan – Paying Taxes Twice?

      Link to comment from November 2, 2025

    • Thank you, David. Yes, let's please do that.

      Post: Logic Check: 401(k) Loan – Paying Taxes Twice?

      Link to comment from November 2, 2025

    • Thank you, Dan. I agree with you. I think it's a tool that must be used with much caution instead of casually just because it's available.

      Post: Logic Check: 401(k) Loan – Paying Taxes Twice?

      Link to comment from November 2, 2025

    • Thank you for pointing to the M* piece. It's very good and also busts the "double tax" myth.

      Post: Logic Check: 401(k) Loan – Paying Taxes Twice?

      Link to comment from November 2, 2025

    • Thanks, William. I had once taken 401K loan myself for a short period. I found it a good option compared to other choices I had at that time. As you say, for someone who isn't confident of being disciplined about paying back the loan, any loan - including from 401K - is dangerous.

      Post: Logic Check: 401(k) Loan – Paying Taxes Twice?

      Link to comment from November 2, 2025

    • Thanks, Mike. The professionals involved here (about this issue) are otherwise genuine and client focused. I think they probably heard this "half-truth" somewhere else and didn't take the time to validate it. I suppose an inadvertent misconception on their part.

      Post: Logic Check: 401(k) Loan – Paying Taxes Twice?

      Link to comment from November 2, 2025

    Articles

    Budgeting Time

    Sanjib Saha   |  Oct 16, 2024

    I WAS FORTUNATE to find enough time during my working years to pursue various hobbies and other personal interests. My part-time work arrangement allowed me to have four-day weekends. I’d hoped that, after retirement, I would have even more time to take on personal projects.
    But surprisingly, I found myself with less free time. Not only was I failing to start new projects, such as writing software for the website of the nonprofit I cofounded,

    Luxury on Rails

    Sanjib Saha   |  Oct 2, 2024

    I LOVE TO TRAVEL—and it runs in the family. My parents were avid travelers, with my father receiving a generous travel allowance from his work every four years.
    In addition, my father always managed his time and budget for numerous other trips. After his passing, my brother and I took turns maintaining the travel tradition with our mom, until plans were disrupted by the pandemic.
    After retiring this year, I eagerly anticipated visiting my mother in India and taking her on a grand tour.

    Honeymoon At Last

    Sanjib Saha   |  Jun 13, 2024

    I’VE BEEN MARRIED TWICE, yet neither time could I take my newlywed wife on a proper honeymoon, let alone a lavish one. Hearing the honeymoon stories of others always left me feeling wistful, tinged with a hint of envy.
    My first marriage was a bit rushed. My first wife—now my ex—and I wanted a no-frills civil marriage followed by a simple reception. But my parents insisted on a traditional Bengali wedding with its array of rituals,

    Money Misconceptions

    Sanjib Saha   |  Jan 11, 2024

    AS I’VE TRIED TO HELP folks understand financial issues, I’ve come across numerous money misconceptions. I wasn’t surprised—because, before I learned better, I too misunderstood some of these issues.
    Here are the top eight misconceptions I’ve encountered:
    Misconception No. 8: Consumer prices drop when inflation falls. Inflation measures the pace of price increases. Declining inflation simply means that prices aren’t rising as fast, but they’re still going up, albeit at a slower rate.

    Final Chapter

    Sanjib Saha   |  Jan 8, 2024

    SIX YEARS AGO, I MADE a big life decision: I opted to scale back my work week with an eye to easing into early retirement.
    I stayed in the same role, but reduced my hours and responsibilities, took a proportional pay cut, and bid farewell to potential future promotions. Essentially, my human capital shifted from a growth investment to an immediate-fixed annuity for the remainder of my part-time employment.
    The change turned out to be far more fulfilling than I’d anticipated.

    My Two Cents

    Sanjib Saha   |  Nov 10, 2023

    AN UNPLEASANT PRICE shock awaits those who grew up in a low-cost-of-living nation and then relocate to a high-cost country. Coming from India, I experienced it firsthand, as I routinely converted prices into Indian rupees and compared them to the cost of similar items back home. In my initial years abroad, this made it challenging to open my wallet. Everything appeared overpriced.
    It took time to come to terms with the fact that, despite higher living costs,

    Changing My Mindset

    Sanjib Saha   |  Oct 13, 2023

    WHETHER MONEY BUYS happiness is a matter of debate, but a recent incident reinforced my conviction that financial security does indeed help. The incident would’ve caused me considerable distress a few years ago, when I was earning more but was still dependent on my fulltime job’s paycheck. My newfound financial security, however, transformed the situation into a truly memorable experience.
    My wife, Bonny, and I both enjoy attending Indian music and dance performances. We make it a point to see the live shows put on by local groups and,

    Affordable Mistakes

    Sanjib Saha   |  Aug 29, 2023

    WHEN I SET OUT TO improve my financial knowledge, sites like HumbleDollar didn’t exist. Instead, I garnered insights from books, investment seminars and like-minded people. Still, my greatest lessons came from my own financial mistakes.
    I’ve made many, and I still occasionally stumble. A few missteps were costly and had lasting repercussions, but the rest were less damaging, especially considering the lessons I learned from them. Here are six of what I call my “affordable mistakes.”
    1.

    Aging Well

    Sanjib Saha   |  Jul 3, 2023

    LIKE MANY IMMIGRANTS living in the U.S., I regularly return to my hometown to visit family and friends. My trips to Kolkata are usually short and jam-packed, seeing not just contemporaries, but also the older generation, including aunts and uncles, my parents’ friends and my friends’ parents.
    My two recent visits—one last fall and the other this spring—were no exception, but I had mixed feelings this time. Most of the older generation are now in their 70s and early 80s,

    Bracing for the Worst

    Sanjib Saha   |  Apr 6, 2023

    BACK IN 1989, AS I was finishing the final semester of my undergraduate degree in India, I managed to bag two decent job offers. The first was from a government organization in my hometown, and the second was from an out-of-state private company in western India. I had a few weeks to make up my mind.
    I was leaning toward the second offer. Not only did the idea of living on my own in a faraway town sound adventurous,

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