Managing Your Money 101

I started working in tech at 24, coasted for the last 4 years of my full-time career, and achieved financial independence (FI) at 46. Here are the basics everyone should know to optimize their finances. The money you save by making wise choices will bolster your financial security and increase the amount you can contribute to effective causes (both money and time).

[I am American. I’ll try to be as general as possible, but some advice might not apply to other countries. All disclaimers apply.]

I’m writing this because anyone can achieve early FI if they are smart and consistent with their finances. And that freedom will allow more people to work on things the world needs without compensation constraints.

Passive income is the ultimate goal

—therefore—

Start investing now; be smart and consistent

Like the adage about “the best time to plant a tree”,

Start now, set up auto-investment of a portion (10–20%) of every proper paycheck you earn in financial instruments that:

  • appreciate in value

  • pay dividends/​interest

  • have no/​minimal maintenance fees[1]

Because of compounding returns, investing sooner will significantly shorten your road to retirement.

Invest primarily in low-cost index funds

Warren Buffett recommends this, and he’s one of the most successful investors of our time. The bulk of your investment should be in broad market indices (e.g., S&P or Dow Jones). You can include international index funds for diversity. But these days, any large-cap stock has international exposure built in.

The expense ratio of your funds should always be < 1%, ideally < 0.1%. Vanguard, Schwab, iShares, and Fidelity typically have low expense ratios.

These funds all have an expense ratio of 0.03% or less:

  • VOO (Vanguard S&P 500)

  • VTI (Vanguard Total Market)

  • SCHB (Schwab Broad Market)

  • IVV (iShares S&P 500)

  • ITOT (iShares Total Market)

  • FSKAX (Fidelity Total Market)
    [½ of my portfolio is in FSKAX]

Fidelity has several zero-expense funds. But you must have a Fidelity account to buy and hold them.

  • FZROX (US Total Market)

  • FZILX (International)

  • FNILX (US Large Cap)

  • FZIPX (US Mid Cap)

  • FZSIX (US Small Cap)

[¼ of my portfolio—my entire 401k—is in FZROX and FZILX.]

Max out your employer match

Accept all free money offered. Always contribute the maximum amount to your retirement fund to receive your employer match. This doubles your investment from the start. Never pass up free money.

Max out pre-tax retirement investing

Max out all pre-tax retirement/​pension opportunities (e.g., 401k, 403b, Roth IRA, RRSP…). Even without a match, it’s still a better deal than paying tax first and then investing. Leverage every legal way to minimize your tax burden.

Turn on automatic reinvestment

Funds will generate dividends from the stocks they hold. Always set your retirement account(s) to buy new shares with the dividends automatically. Cash sitting in a retirement account is losing value due to inflation.

Set up an automatic recurring investment

Don’t rely on manual investments; life will get busy, and you’ll forget.

An automatic investment from your paycheck will naturally smooth out any market volatility.

Dollar cost average your withdrawals

You can’t predict the market, so make regular withdrawals during retirement.

Set a beneficiary on all of your investment accounts

This will streamline the legal process for the people who inherit your account.

25× what you spend each year invested = retirement

The 4% rule of thumb (aka 25× rule) says that you can safely withdraw 4% of your investment every year, and it will last at least 30 years, even indefinitely.

It might be prudent to have a buffer so that you are only taking out 3% or 3½%, increasing the chance of indefinite sustainability.

Alternately, you can supplement retirement income with part-time work. This is sometimes called Coast FI or Barista FI. (Because here in America, you might need a job for health insurance. Yay us 😐)

Paying off debt is usually the best way to invest

The default prudent decision is to pay off debt. It’s a guaranteed, risk-free, tax-free return on investment. Only keep it if you have a specific better reason (e.g., the government might pay it off at some point, there are tax advantages, or it’s such a low rate, you can earn more investing it).

Never carry credit card debt

Credit card interest rates are horrible. Only buy with a credit card if you have the cash to pay for it now. Always pay off your entire credit card balance due every month. If you do have credit card debt, seriously consider debt consolidation.

Don’t buy a residence (before doing the math)

The real estate market in the USA has changed significantly since the days when everyone with a steady salary could afford a house. But even if you can afford to buy, you probably shouldn’t, because “your house is NOT an investment.”

This century, the average annual appreciation of homes was ~4%, while the stock market was ~9%. Additionally, real estate requires both fixed costs (down payment, broker fees, and closing costs) and recurring costs (everything else):

  • Down payment: 20%

  • Broker fees: 5–6% (generally paid by the seller)

  • Closing costs (lender fees, title insurance, appraisal, escrow, transfer tax…): 3.5%

  • Property taxes: 1.1%

  • Maintenance: 1.0%

  • Insurance: 0.5%

  • HOA fees (if your property is in an association): 0.5%

The median home price is $400k (3 bedroom, 2 bath, 2200 sq ft), so property taxes, maintenance, and insurance would be about $10k per year. That’s not including a monthly mortgage payment; a 30-year fixed at 6.5% on a $320k loan is $2k per month, so that $400k house you just bought with an initial $94k outlay costs an additional $36k per year (9% of the purchase price!).

If you don’t buy, you still need to live somewhere. Median rent for that same house is about $2.2k/​month (apples-to-apples against our home price).

So a renter could take that initial $94k outlay and put it in an index fund. They can also invest the $10k per year they aren’t spending on recurring housing costs.

I plugged all this into an LLM, which found net gain over 10 years of $400k for the renter vs $371k for the homeowner. That’s nearly $3k per year more you could give to effective causes if you rent rather than buy.

Other recommendations

For cash, checking, and credit cards:

  • Get a cash-back credit card (Ideally 2%, at least 1%). I use the Fidelity Rewards Visa which gives 2% cash back. They also don’t charge a foreign transaction fee. I also exclusively use my Amazon Prime Visa for 5% back at Amazon and Whole Foods.

  • Use your credit card as a convenient replacement for cash. Don’t spend money you don’t have.

  • Get a high-yield cash account with checking features. I use Wealthfront, which is currently 4%.

  • Get an ATM card that reimburses fees. I use Fidelity, which doesn’t charge foreign transaction fees.

  • When traveling abroad, bank ATMs are the best way to get cash.

  • Don’t be afraid to dispute dubious credit card charges.

  • Use the purchase protection benefit of your credit cards. It will reimburse you if an item you buy is broken, lost, or stolen.

  • Always call and ask for fees to be waived (such as for a missed payment or annual fee). I’ve done this a dozen times, and it nearly always works.
    (But only if the fee is big enough to make it worth your time. I usually let go of anything under $20.)

  • Never loan money to friends or family. If you do, consider it a gift.

Further info

Anything by Rebecca Herbst (founder of Yield and Spread)

Kindling change: How FIRE can help you do good (Rebecca’s talk from EAGx Virtual 2024)

Personal Finance for EAs (post) by Nicole Janeway (Dec 10, 2022)

Quit Like a Millionaire (book) by Kristy Shen (founder of Millennial Revolution)

Playing With FIRE (book and website)

  1. ^

    Some would say rental income is a source of passive income. Not me. Real estate requires a lot of time and money to maintain. I never have to insure, repair or get a lawyer involved with my financial portfolio.