Rohan’s Ultimate Guide to Personal Finance

Rohan’s Ultimate Guide to Personal Finance

Time to read: 15 minutes

Cost to read: $0

Time to implement: <1 hour/month

Time to get rich: 30+ years

Money Saved: $0 - 1,000,000+ (*)

it’s not useful to watch the stock market day-to-day

  • just trying to not be bad will likely net you more gains over the long term than actively trying to be good. Mistakes are made when actions are taken and trades are conducted, so doing nothing can often be the best move.

Roth stuff: Say that you’re maxing out your after-tax contributions by contributing $27,000 per year, or $1038 per paycheck. Let’s assume that this money is invested immediately and rolled over to Roth the next day. Even with an average of a 1% gain between the day the money hits your account and when it is rolled over (incredibly unlikely, or else we’d all be very rich), you’d be paying taxes on 1038 * 0.01 * 26 = $269 more of income. that means you’re paying taxes on $598 right now (which you wouldn’t pay if you weren’t doing this), for the right to invest $27,000 this year, keep it invested for 30+ years, and not have the gains (or principal, of course) taxed at all. That’s huge.

This document attempts to concisely cover some of the different aspects of managing one’s personal finances. I decided to write it as I received a lot of questions from different peers about investing, negotiating job offers, and tax-advantaged accounts. I hope that this becomes a useful overview to refer back to every couple of years.

Who this Guide is For

This guide is primarily aimed at individuals in their 20s-30s who have stable employment, not much debt, and are earning income of about 70k-500k a year. This guide aims to help individuals in such positions save for common goals (weddings, retirement, house down payments, or large purchases), grow their investments through low-cost, low-effort approaches, increase their total income, and plan for (potentially early) retirement through the use of tax-advantaged accounts.

How this guide is structured

This guide is structured like an ordered series of steps that one can follow as they manage their personal finances. The ordering is my personal view of the most important aspects of one’s finances to take care of first, not necessarily what will make the most money in your particular situation.

Pay off all your high-interest debt

First, before saving for retirement, starting an emergency fund, or investing in the stock market, I always recommend paying off your high interest debt in full. This is to maximize how quickly high-interest debt can be paid off, so that it has less time to accrue compounded interest. A few personal finance gurus on the internet recommend contributing to your 401(k) plan up until you maximize your employer’s match (see the below section on 401 (k) if you’re not familiar with this), instead of using this to pay down your debt. The reasoning for this is that it is essentially “free money”, and you’re leaving it on the table by not maximizing the match your employer offers you.

Here’s my take on this. That “free money”is in a 401(k) account, and you won’t be able to touch it until you’re at least 59.5, without paying hefty fees. Meanwhile, your high-interest debt is accruing right now. Depending on your investment returns, it is unlikely that the extra money in your 401(k) will grow faster than your high-interest debt grows.

For example, say that you owe \($10,000\) …. do this example.

Contribute the minimum amount to your 401k to get your employer match

All about 401(k)s

This section covers the tax-advantaged retirement plan offered by many employers in the US. It explains and explores the benefits of pre-tax and Roth 401(k) contributions, employer matches, as well as the “Mega-backdoor Roth 401(k)” strategy. Note that not all employers offer the option to contribute to a Roth 401(k) or to do the mega-backdoor Roth 401(k).

As mentioned a 401 (k) is a poorly-named, tax-advantaged, retirement plan offered by many employers in the US. Tax advantaged means that contributing to the plan will net you some tax benefits either in the present or in the future, with the tradeoff being that your money is locked up until reaching the age of 59. Essentially, your employer deducts an amount of your choosing, either pre or post tax, and it is contributed to your 401(k) .

Traditionally, 401(k) contributions are made with pre-tax dollars, meaning that you do not pay taxes on your contributions to the 401(k), and instead, this income is taxed when withdrawn during retirement. Another, newer option is the Roth 401(k), where you contribute post-tax dollars in exchange for your withdrawls not being taxed at retirement.

The total maximum you can contribute between both accounts is \(19,500\) in 2020. This means that if you make \($100,000\) in the year 2020, and maximize your pre-tax 401(k), your taxable income will go down to \($80,500\) for the year. Forgetting the standard tax deduction for now, this means that you do not pay marginal taxes of 22% on income from 80,500 to 85,526 and marginal taxes of 24% on income from 85,526 to 100,000. This means that you save \(0.22 * (85,526 - 80,500) + 0.24 * (100,000 - 85,526) = 4579.48\) in present (2020) dollars. This is extra money in your pocket right now, in exchange for your contributions (and possible gains) being taxed as ordinary income when you withdraw them at retirement.

On the other hand, if you simply invested this money into a brokerage account instead of the tax-deferred 401(k), you would have paid this extra \($4500\) in the form of taxes right now. However, you would of course be allowed to take out your money whenever you want, for example to use it on a house downpayment or to buy a car, while withdrawing from your 401(k) is not recommended and generally involves paying penalties. Therefore, it’s only recommended to contribute to your 401(k) if you intend to truly save the money for retirement.

Now, let’s discuss what happens if you instead decide to contribute \(0\) to your pre-tax 401(k) but maximize your Roth 401(k). Unlike the traditional pre-tax 401(k), the Roth 401(k) is funded with post-tax dollars, meaning that maximizing it will not provide you any tax benefit in the present. However, when withdrawing Roth contributions and potential gains, the money is completely tax-free.

Case Study: Pre-tax 401(k) vs Roth 401(k) vs Brokerage Account

We will explore the tradeoffs with the above 3 potential courses of action by assuming that the money is locked up for a term of 40 years with an average rate of return of 6%. Note that these figures do not account for the fact that the money is not actually locked up in the brokerage account for 40 years, and you will have to apply your own discounting factor based on how important you perceive that to be.

Scenario 1: You maximize your pre-tax 401(k) and contribute \(19,500\) to it in 2020. In 2060, that is worth \(200,571.50\), and the \(4579.48\) has grown to \(47,103.24\) for a total of about \(247,700\) . You will thus be taxed at 2060’s marginal tax rates on \(243121\) as you withdraw it during retirement. Assuming that you withdraw it in a year and are taxed how you would be today, you would be left with \(174,952\) (using and Of course, you may end up paying less in taxes if you withdraw a smaller amount, but still have to comply with Required Minimum Distributions.

Scenario 2: You maximize your Roth 401(k) and thus do not save on taxes in 2020, but your \(200,571\) is tax-free upon retirement.

Scenario 3: You do not contribute to your 401(k) at all and thus get no tax break, and your money has grown to \(200, 571\) after 40 years. But this is then taxed leaving you with \(147, 823\).

There are a lot of issues with these calculations as I mentioned: they do not account for the possible utility of being able to use your money whenever you want in Scenario 3 and, they assume the entire amount is withdrawn in 1 year so the tax rates are likely inflated, and they do not account for the utility of being able to use the initial $4579.48$ investment whenever you want in Scenario 2.

Roth 401(k) or pre-tax 401(k)? Questions to ask yourself.
  • Will I absolutely need the money I save in the present by contributing to the pre-tax 401(k)? Are there big-ticket purchases in my near future that this extra cash could be valuable for?
  • What are my spending habits today versus in the distant future?
  • Will my goals be negatively affected by RMDs if I have pre-tax contributions (or a Roth 401(k) not rolled into a Roth IRA)?
  • Do I expect to be taxed more today (and thus contribute to a pre-tax 401(k) and pay less in taxes at withdrawl time), or taxed more at retirement (and thus contribute to a Roth 401(k) and pay my taxes now)?
  • Do I currently work in a high-tax state and plan to retire in a low/no income tax state (or vice-versa)?

The “Mega backdoor” Roth 401(k)

Note that the following is conditional on your employer offering this benefit throught their 401k provider.

This is a strategy for those who want to save money for retirement in tax-advantaged accounts in (significant) excess of the \(19,500\) limit for 401(k) plans. The \(19,500\) 401(k) contribution “limit” is actually known as a basic employee contribution limit, and there is also a limit of $56,000 in 2019 known as the general limit and is the cap for all employee and employer contributions (for example this includes the employer’s match).

You are allowed to contribute the difference of what you and your employer have already contributed to an afer-tax 401(k). For example, if you earn 100k and maximize your 401(k), and your employer matches contributions up to 5% of your salary, then the total contribution to your 401(k) will be \(19,500 + 5000 = 24,500\), meaning that you can contribute up to \(31,500\) to an after-tax 401(k). This means that your money is taxed at your current marginal rate when contributing to your account, and you pay taxes on capital gains, as a regular account. At first glance this doesn’t look useful at all, but we will now see why this is an incredible tool for saving money for retirement.

Essentially, the IRS allows you to convert these after tax contributions to Roth (either a Roth 401(k) or Roth IRA, it doesn’t matter too much), and only pay taxes on the capital gains that occured before you converted to Roth.

To see why this is awesome, let’s say you contributed the above \(31, 500\) to an after-tax 401(k) and rolled it over to Roth at the end of the year. In the year, your investment has grown 10% for capital gains of \(3,150\). You will pay about \(1200\) in capital gains tax when doing the conversion to Roth, but in exchange, the \(34,650\) and all capital gains henceforth are completely tax free. In 40 years, if this money grows at 6% to \(356,400\), you will not pay any taxes on this amount. Essentially, you’ve paid taxes of \(3150\) in the present in exchange for zero taxes on capital gains of ~\(320,000\), which would otherwise have been taxed at long-term capital gains rates (15-20%). Of course, similar to traditional 401(k) contributions, the tradeoff is that you will not be able to access this money until age 59, so only do this if you’re confident that the money won’t be needed until then.

IRAs and Rollover Strategies

Rolling over a Roth 401(k) to a Roth IRA
The “Backdoor Roth”: Rolling an IRA to a Roth IRA
Start an emergency fund
  • 3 months to 6 months, survival, even in the case of a disaster
  • Assume a giant earthquake hits (I’m from California) and you don’t have anywhere to live, any food to eat, and you’re also unemployed. Are you able to use your emergency fund to get yourself (and your loved ones) back on your feet? This is my metric for a good emergency fund.
  • Unexpected medical expenses
Contribute to a Roth IRA (if you earn < 120k a year)
Max out your 401k contributions, and/or contribute to an IRA
  • If you can’t max out both your 401k and IRA contribution for the year, then you’ll have to decide whether to contribute to the 401k or the IRA. In general, if your 401k account seems to fewer investment options or have high fees (compared to a brokerage such as Vanguard), such as advisory, active management, or trading fees, then you may want to max out your IRA in an account of your choice (such as Vanguard), where you have more control over the fees you pay and possibly greater access to more financial products.

Consider maxing out your HSA

** If you have an FSA, put the minimum rollover into it **

** Consider a Backdoor Roth IRA, if you make too much to contribute to a regular Roth IRA **

** Consider setting up the mega-backdoor Roth IRA, especially for higher earners **

Open a standard taxable investing account, such as with Vanguard
  • Optional section: tax loss harvesting to improve your gains
    • Better for high net worth individuals
Leveraging Credit to your advantage

Open a high-yield savings account

  • As of early 2019, the fed has continued to hike interest rates, so rates on savings accounts have continued to go up. The best accounts I know of right now are Wealthfront’s cash account (2.57% APY) and Goldman Sach’s Marcus account (2.15% APY), and

This has the potential to save you a lot of money over a lifetime. Say that you want to establish a risk-free account where your money can slowly grow. Your local bank will tell you just to open up a savings account from your checking account, and they’ll transfer over how much money you have to safe every month. Easy and done (they’ll even throw in a whole $300 as a bonus!).

This is one of the times where going with the default can have an outsized negative impact on your (financial) life. Let’s say that you bank at one of Chase, Wells, or BofA. A quick search reveals that (as of July 2019) the first two offer a 0.01% interest rate on your savings (that means, for every $10,000 you save with them per year, they give you one dollar). The latter offers a savings rate of 0.03%. Let’s assume that you bank at BofA and decide to use them for your savings as well. You start off with a 20k principle, and contribute 5k a year for 40 years.

This means that over 40 years, you’ve missed out on $184,830.04 of free, risk-free money. If you didn’t stop in the middle of this section and open up a high-yield savings, do it now, I’ll wait. Simply internalizing this bit of advice and spending < 30 minutes opening up an account online can net you an additional free 200k over a lifetime, at zero extra risk.

** These numbers are based off of interest rates as they were in June 2019. They will change, please don’t come after me with a pitchfork. With rock-bottom interest rates, you’re often just better off spending your money.

[1] Computed as a difference between total value of one account. Value is pretax. Of course, savings rates are variable and tend to fluctuate over the years. It’s still likely that high-yield online savings accounts will continue to offer at least tens of times more interest (in APY) than traditional brick and mortar banks.

220,483.13 - 405,313.17

FIRST AND FOREMOST: pay off your credit card in full at the end of the month, every time, with no exceptions. Do not carry a balance month to month. If you think that you will need to, then stop using your credit card and go back to debit (and work on getting in a better financial situation?)

After getting a credit card and making on-time, full monthly payments for 6 months:

  • Ask for a credit limit increase. Not so that you can spend more necessarily, but you can use this to decrease your credit utilization (better for your credit score). You can also do this if you get a raise or otherwise gain income.

If your credit limit isn’t very high, you risk having a high credit utilization, which could negatively impact your score. If you notice your credit utilization hitting 30%, it might be wise to pay off your credit card twice a month, to keep that utilization low. Most credit card companies allow you to set multiple autopays so you can just set this and forget this.

Opening and starting to responsibly use a credit card can have numerous advantages. Several personal finances gurus, most notably Dave Ramsey, strongly encourage their listeners to not use credit cards. Ramsey may have a point for individuals who have trouble controlling their spending and have been riddled with consumer debt in the past. But for debt-free individuals who spend less than they make, credit can be a very effective tool.

Why? One word: leverage. Warren Buffet has said that the 3 L’s that will cause you to go broke are “liquor, ladies, and leverage”, but we’re not talking about taking out a loan to invest in the stock market here.

Using leverage properly will allow you to amplify what you can do with your money and what impact it will have on your life. We use leverage all the time in our daily lives without being aware of it (example: any time you pay someone else to do something for you), yet many people are vehemently opposed to doing so with money.

If you were given a 5% discount on all your food, you’d be silly not to take it.

Building your credit history

Other reasons to use a credit card over a debit card

Obviously, points, cash back, and building your credit history. But are there other benefits to swiping your credit card over your debit card?

  • Security features? Better fraud protection?
  • Miscellaneous freebies, such as cards that give you insurance for your phone
  • Frees you up to do other things with your cash in the checking account, since you pay for shit at the end of the month (time value of money, saves you a small amount of money that adds up every year)

A word on churning

Many people have heard of the term churning, which refers to the practice of opening up many high-reward credit cards and milking them for their benefits. Pro churners are generally able to get regular cash bonuses and airline miles as a result of this research. However, I generally recommend against this practice since credit card rewards won’t change your life in any meaningful way, and once you’ve got a few cards that are best suited for you, opening additional credit cards will only increase your burden. It’s also much easier to spend a lot more on these cards, since a higher spend is generally needed to hit the minimums needed to get the cashback bonus or airline miles that many churners seek.

Thus, I recommend avoiding this practice and holding only a small number of credit cards.

Setup automatic payments on all your credit cards to pay off the bill in full each month, so that you never miss a payment and always pay in full (improving your credit score). If you have many credit cards, then don’t forget to use each one at least occasionally, since accounts can be shut down if you don’t use your credit cart. An easy way to do so is to put a recurring subscription on the card, or use it to buy your coffee.

However, I only recommend holding a small number of credit cards at once. Just for stress purposes, it becomes a lot to manage

A word on loans
  • Never take out an auto loan if you don’t have to
  • This explanation is of course oversimplified, since it doesn’t take into account the fact that money at the end of the loan term is worth less than money right now, so it must be discounted appropriately.

In particular, if you’re a high-net worth individual (for example, earning over 1M a year), this guide probably won’t be too useful to you. If you’re also interested in eventually owning real estate (beyond saving for a down payment on a home), most of this guide probably still applies to you, though you may wish to skip the portion including my thoughts on real-estate investing.

When a loan might be helpful

Invest early, and invest often - you will not build or grow wealth unless you invest.
Automate your finances
  • Setup recurring transfers from your main checking account to savings, investment accounts, etc

    • Warning here: make sure that your bank account has sufficient balance to ensure all these transfers complete successfully every month, to avoid overdraft fees. This could happen if a regularly scheduled paycheck is missed, if you switch bank accounts and forget to transfer everything over, or get a new job and miss a biweekly deposit.
  • Automatic buys into the market

  • Automatically save for vacations, etc

What’s next? Additional Strategies

If you’ve done all the above, then congratulations! You’re debt free, have an emergency fund that can support you for a 6 months, are contributing the maximum to your 401k and IRA, hold cash for near-term use in high-yield savings accounts, and are regularly contributing to these cash accounts for large purchases that may be on the horizon (a home, a car, a wedding, helping parents, etc).

When should you take money out of the market? If you’ve invested a large portion of your assets into funds that track the stock market, then you know that large short-term fluctuations in your assets are likely to happen. For example, in the recent stock market correction in the end of 2018, the S&P 500 index dipped nearly 20%. If you planned to buy a house around late 2018 or early 2019, and the money was tied up in the stock market, you’d have to liquidate in order to make your down payment. This would result in you pulling out of the market at a local minimum (the market ended up rebounding in the first half of 2019), at a significant loss.

Since stocks can be wildly volatile,

Contribute to an HSA


Consider a mega-backdoor Roth IRA


Review your tax situation
  • Large refunds should objectively be undesirable, since this indicates an interest-free loan given out that could have instead been used to generate additional income. However, research has shown that people are more likely to save and invest a lump-sum refund, but more likely to spend the same money if they had gotten bits of it through regular paychecks the previous year.
  • Ideally, you’d break even at tax time, or owe very little, or in the best case, owe just enough to avoid extra penalties.
Consider setting up additional income streams

Generally speaking, company-sponsored 401k plans don’t have great investment options, as they are often limited to the investment options that the company providing the 401k plan offers, which often includes a push towards high fee investment vehicles.

Real Estate Investing

Disclaimer: I know very little about this, and my opinions are likely going to change as I explore more.

Thanks for reading this! If you actually got here and read through the whole thing, I hope that you got something useful out of it! If you did, I would love to hear about how via email, or this google form if you’d like to remain anonymous.

Checklist for every couple of months:

  • You’re likely paying more than you need to for some bills: cable, internet, etc. Make sure that you’re not.
  • Negotiate insurance rates, or look for other insurance providers who can improve your rates
  • Ensure that you are using the best credit card for your needs
  • Call to increase your credit limit, thereby improving your credit score by decreasing your credit utilization


Why credit cards are important

Portfolio allocation - using the efficient frontier to determine an asset allocation such as allocation to US stocks and international stocks (VTSAX, VXUS)

Tax efficient fund placement - why is it important to efficiently place certain funds in taxable, tax-advantaged, tax-free accounts and the difference that this can make -

Allocating for tax-efficiency in pretax and Roth 401k Suppose you have 80/20 stocks/bonds allocation, try to put the 20% of bonds in the pretax 401k first, and if anything is left over, then put that in the roth (or vice versa if you have too many stocks to hold in the roth) Pretax - prefer to hold your bonds here, since they are taxed upon withdrawl, but the gains will most likely be less than stocks Roth - prefer to hold all of your stocks here, since the gains will not be taxed at all upon withdrawl