Financial Decisions

Money is Hard

Structural Challenges

Significant financial decisions involve uncertainty about the future, so you are deciding based on incomplete information about what will happen to house prices, interest rates, your own income, your health, and other variables no one can reliably predict. This makes financial decisions fundamentally different from problems that have correct answers and it means that even a well-thought-out financial decision can produce a bad outcome, and a poorly-made one can produce a good one.

Financial decisions also typically involve delayed consequences, so the full impact of a decision made today may not become clear for years and learning from experiences is slow and unreliable. A bad financial habit produces gradual damage over decades, while good financial habit produces compounding benefits, but both in both cases, it's hard to trace back to the choices that generated those outcomes.

Additionally, financial decisions can be emotionally driven and thus, activate the least analytical parts of our brain. Fear of loss, excitement about potential gains, social pressure, status anxiety, and the desire for immediate gratification all apply pressure in ways that conflict with rational analysis.

Understanding these components don't instantly make anything easier, but it does set realistic expectations and can help you realize that the goal is not to make perfect decisions, it's just to make consistently better ones over time.

Good Decisions vs Good Outcomes

A good decision is one made with the best available information, appropriately accounts for risk and uncertainty.

A good outcome is one where things worked out well.

While they frequently coincide, sometimes they don't, and the exceptions are significant.

Someone who invests their savings in a single speculative stock and happens to make ten times their money has achieved a good outcome from a poor decision. The quality of the outcome does not retroactively validate the reasoning process. The same type of decision (picking a single stock) made a hundred times would produce very different results, most of the time producing subpar results. Another example is making a half-court shot with plenty of time on the clock; an objectively bad shot, but it worked out.

Someone who diversifies carefully, thinks through risk systematically, and still loses money in a market downturn has made a good decision that produced a bad outcome. The bad outcome does not mean the reasoning was flawed. This is especially common in the short term, as good decisions increase your chance of good long-term results, but the near future is mostly subject to things out of your control. Another example is planning a fun outdoor trip and it ends up raining; trips require booking weeks ahead of time but the weather forecasts are only accurate a few days in advance.

The practical implication is that you should evaluate your financial decisions primarily by the quality of your thought process, not by what happened afterward. If you made the best decision you could with the information available and thought clearly about the range of possible outcomes, that is a good decision — even if it didn't work out. If you made a decision based on an uneducated guess or social pressure, and it happened to work out, that is a lucky outcome and should not be repeated.

Big Over Small

Research on long-term financial outcomes suggests a fairly consistent picture: the decisions that matter most are the big ones made relatively infrequently. The major decisions tend to revolve around the following: career choice, where you live, major debt commitments, savings rate, and who you choose to marry. The decisions that receive the most daily attention, like buying coffee, going to the cheaper gas station, and picking specific stocks, have little impact compared to getting the big decisions right.

Let's look at an example comparing two people on five factors.

• Person A

  • $40,000 salary

  • Partner struggles with credit card debt

  • Never buys brand-name products

  • Only orders water when eating out

  • Packs lunch for work

• Person B

  • $120,000 salary

  • Partner is debt-free

  • Buys the expensive milk

  • Always orders lemonade at restaurants & fast food

  • Buys lunch at the cafeteria

Looking at these two, which one do you think is better off? Person A does all of the small things right, but their career and partner have an outsized impact on their financial outcome. Person B can work on a few things to save more, but they are in a much better position due to getting the big decisions right.

There are a million things you can focus on in life, so it's all about what to prioritize; invest more time into the decisions that are large, structural, and relatively irreversible. You can still do the small, easy things, like getting the cheaper gas, but focus on them such that they get in the way of much more impactful matters. The goal is not to make every financial decision perfectly, it is to make the right decision on the handful of things that actually moves the needle.

How to Make Financial Decisions

Framing Your Goals

Many financial decisions arrive pre-framed by whoever is presenting them to you:

• A salesperson framing a car purchase around monthly payments rather than total cost

• A mortgage broker frames a loan around the max you qualify for rather than what you can truly afford

• A financial advisor frames an investment around its best recent performance rather than its long-term average.

The frame you are handed almost always serves someone else's interests, so the first step in any significant financial decision is to reframe it yourself, on your own terms. Reframing a financial decision means stripping away the presentation and restating the choice in its most basic form:

• What am I actually deciding on?

• What are the real options, including the ones that are not being presented to me?

• What is the total cost of this decision, not just the most visible part?

• What am I giving up by making this choice, financially, time-wise, flexibility, and opportunity?

A car loan framed as "$600 a month" sounds much more affordable than a $30,000 commitment over five years, plus insurance, maintenance, and the opportunity cost of that money not being invested. If you were just looking at the total cash value, you may instead limit yourself to a $20,000 car, or $400/month. $200/month doesn't sound like a lot, but $10,000 certainly does. It's also worth considering that these individuals seldom have the same goal as you; they want to sell you a car and earn a commission, while you want an affordable, reliable means of transportation. Making your decisions from the reframed position usually produces a much better outcome because it's now based on your goals, not the salesperson's.

Reframing is not only used to compare between different options, but also to compare between action and doing nothing. You may need a car or a mortgage, but do you really need whole life insurance?

Irreversibility

Not all financial decisions carry the same stakes, and one of the most useful ways to determine how much time and effort to invest in a decision is to assess its reversibility.

• Reversible Decisions: Ones you can easily undo, adjust, or exit relatively easily deserve a reasonable amount of thought, but overthinking has real costs in time, energy, and opportunity. If you are choosing between two savings accounts that have 3% APY, the cost of making a suboptimal choice is low. Make a decision and move on.

• Irreversible Decisions: These deserve substantially more care and include buying a house, starting a business, and changing your career. The cost of being wrong is high and while not always strictly irreversible, the path back is difficult. Investing significant time and seeking multiple perspectives is appropriate for these choices.

The mistake most people make is applying the same level of care to both types, spending too long choosing a streaming service and not enough time evaluating different options for mortgages. A simple rule: before any financial decision, ask "how reversible is this?" If the answer is "very reversible," move quickly. If the answer is "not easily," slow down.

Probability vs Certainty

Most people act as if the future were more predictable than it actually is, leading them to choose a course of action based on the most likely outcome. When things go differently, as they often do, people are often unprepared. Instead of thinking about the most likely outcome, it is more useful to think in terms of a range of possible outcomes rather than a single expected one. Let's look at an example for investing in a stock for a year, and for the sake of opportunity cost, let's say the overall stock market returned 10%.

• 40%: Huge Gain (+30%)

• 15%: Break-Even (0%)

• 15%: Slight Loss (-5%)

• 15%: Huge Loss (-30%)

• 15%: Goes to 0 (-100%)

The most likely individual outcome is that the stock goes up a lot, and even a 55% of not losing money, but there's a 60% chance you'd lose money relative to the market. Additionally, it has an expected value of 6%, which is lower than the market return of 10%, though most decisions will not have a clean calculation.

Before any significant financial decision, construct at least three scenarios: the optimistic case, the base case, and the pessimistic case. It's not about "what do I expect to happen?" but "what will my financial position look like across the range of possibilities?" This ensures you account for risks that single-scenario thinking tends to suppress, forces you to be more prepared for things that could go wrong, and it helps calibrate the decision against your actual risk tolerance.

The Cost of Inaction

One of the most common mistakes is not deciding at all, as inaction feels safe and its consequences are invisible. However, inaction in your financial life is a decision, one that carries real costs that compound over time just like active choices.

A 45 year old who delayed starting a retirement account because they felt they didn't know how to invest has paid a cost in missing out on compound growth. If they started investing just $500/month since age 25, they would contributed $120,000 and their account balance would be $360,000 at 10% returns. If that same person moved their $20,000 emergency fund into a high-yield savings account, let's say 2% APY, instead of keeping it in a near-zero-interest one, they would've had another $10,000.

Inaction feels safe because it is rooted in loss aversion, the emotional bias that makes losses feel roughly twice as painful as equivalent gains feel good. A 10% loss feels worse than failing to invest in the market that would've led to a 10% gain, even though the financial outcome is identical. This asymmetry systematically biases us toward doing nothing, even if doing nothing is worse.

Counteracting this bias requires explicitly accounting for inaction. Before deciding not to decide, ask: "What is this delay actually costing me?" In many financial situations, the cost of inaction is concrete and calculable, like interest accumulating on a debt not being paid down, missing out on returns on money not invested, and your salary not increasing. Making that cost visible rather than leaving it as an invisible abstraction of "waiting until I know more" is an important first step.

Systems and Safeguards

Financial Advice

When looking for a professional financial advisor, the single most important question is: "What is your incentive structure?" Look for a fee-only fiduciary, as financial advice given by someone compensated through commissions on the products they sell will be fundamentally different. The first is legally required to act in your interest and is compensated in a way that removes the biggest conflict of interest, while the second advisor has a financial incentive to sell you specific products.

Beyond the incentive structure, good financial advice should be advice that is specific to your situation, not generic recommendations dressed in personal language. A lot of the information on this site is very general and may not apply to your specific situation. Recommendations change drastically for someone that is 20 vs 60, low vs high income, or single vs married with kids. Advice that doesn't engage with those specifics is not really advice.

Making Decisions Under Stress

Mistakes become more common while under stress, whether it's you lost your job, your car broke down, or you're in a bad relationship. Payday loans are taken out by people whose immediate cash need overwhelms their ability to process the 400% annualized interest rate, while retirement savings are liquidated at market bottoms by people whose fear they'll lose all of their money.

Understanding this pattern doesn't automatically break it, but there are some things you can do. 

1. Financially prepare during calm periods: Build your emergency fund, think through how you would respond to various financial scenarios, and make as many significant financial decisions as possible before the stress comes.

2. Build in explicit rules or delays for decisions under stress: A standard rule of waiting 48 hours before acting on any significant financial decision is surprisingly effective, and this may include buying a car, home, or taking your money out of the stock market.

The general principle is that your financial decisions should be made by your calm, well-rested self, not by the version of you that is tired and under pressure. Note that it's not just about willpower; it's about creating the conditions that allow the former to make more decisions than the latter.

Building Better Habits

Ultimately, the quality of your financial decision-making is less about any individual choice than about the habits you build around the process of deciding. The most effective financial decision-makers share a few consistent characteristics:

• Seek perspectives that challenge your initial thinking rather than those that confirm it

• Separate the emotional processing of a financial situation from the analytical processing

• Streamline your financial life

  • Automatic savings/investment contributions

  • Simple investment allocations that don't require constant decisions

• Track your decisions and review them honestly

The goal is not to become a different kind of person who makes perfectly rational financial decisions; it is to build a decision-making environment that makes your life easier and produces reasonably good outcomes More than any particular financial insight or market opportunity, this is what will produce genuine financial security.

Real-World Applications

Picking a Career

Choosing your career is often the biggest financial decision you'll ever make, and many people significantly underinvest in thinking about it as such. Your lifetime income will dwarf the impact your investment decisions; if have a career that pays an extra $10,000, and you invest it for 30 years with 10% returns, that's an extra $1.7 million in retirement. That alone would be a $70,000/year salary in retirement (following the 4% rule). If you double your raise to $20,000, that's $3.4 million in retirement, or $140,000/year.

This doesn't mean you should choose your career based purely income potential; as the point of work is to enable you to live your best life and money is only one component. Meaningful pursuits, autonomy, and wellbeing are all significant factors and are quite rare in many high-paying industries. 80,000 Hours is a great resource for research on the meaningful pursuits side of things, while various articles and posts share working conditions for jobs, like how often they're forced to work overtime, if micromanagement is common, and the benefits one can expect to be included.

The most undervalued skill is negotiation, as research consistently shows that salary negotiation works. Of course, this depends on your industry, and many people aren't comfortable negotiating. I am one of those people, so instead of directly asking for more, I mention an offer or two I've received to set a baseline; it's not about squeezing out every small increment, but telling them your last job paid $60,000 vs $120,000 makes a huge difference. Employers typically have more room than their initial offers suggest, and that the temporary discomfort of asking is vastly exceeded by getting an extra $20,000/year.

Another undervalued career decision is the willingness to leave, since the single most reliable way to significantly increase your income is to change employers. Most people stay in roles getting 2-3% raises when switching companies often provides boost of over $10,000/year. The combination of status quo bias, sunk cost fallacy, and the availability heuristic makes staying feel much more comfortable, and which is fine and completely normal. This isn't saying you should quit without having another job lined up, leave every two years no matter what, or uproot your family and move across the country because there's an offer for an extra $20,000, but switching jobs is one of the most reliable ways to improve your financial status.

With all that being said, by far the most important factor is not negotiating or switching jobs, it's to possess and develop in-demand skills. Typically, the things people are passionate about don't pay well, have extreme positive skewness (more below average outcomes with a few extremely good ones), or come with high levels of stress, which include industries like sports, art, and social media. For all the people who have done well in those industry, congratulations, but the vast majority of people should not go for these "fun" industries if financial stability is a primary goal. This does not mean everyone should aim to doctors or lawyers either, as those often come with extreme stress and require most people to take out a lot of debt. The hottest jobs change all the time, but tech, finance, and health seem to be fairly consistent with great upside. You can choose whatever field you want, but be honest with yourself about salary expectations and the other parts of your life your career choice will impact.

Most career advice revolves around finding something that fits your values and interests, perhaps you should instead focus on what the job means for the rest of your life. Maybe you love animal research, but working long hours for low pay leaves you with little energy to pursue your own projects at home. Instead, you could have a more relaxing job in a conventional industry that pays more, allowing you to do more personal research in your free time. A full breakdown of career choice and how it impacts your life is beyond the scope of this section, but just make sure to be more intentional with the biggest decision you'll ever make.

Buying a House

Purchasing a home is the single largest financial asset most people will ever decide on, and it is deeply embedded as a marker of adulthood and success in most Western cultures. "Renting is throwing money away" is one of the most widespread myths in the financial world. Houses do indeed appreciate in value, but that tends to just be in line with inflation. Contrary to popular belief, buying a house is not a path to wealth, as when your home goes up in value, so do all the others around it.

From a financial standpoint, one is not inherently better than the other; it all depends on your area. Sure, renting is a sunk cost, but owning a home also has sunk costs, primarily including maintenance costs, interest, and property taxes. Ben Felix expands this to account for opportunity cost (investing the difference in stocks) to create the 5% Rule: multiple the value of the home by 5%, divide by 12, and that is the sunk cost equivalent to rent. Let's look at a couple examples:

• Area 1

  • Home Price: $800,000

  • Rent Price: $3,000

  • 5% Rule: ~$3,300

  • Verdict: Better to Rent

• Area 2

  • Home Price: $400,000

  • Rent Price: $2,000

  • 5% Rule: ~$1,700

  • Verdict: Better to Own

It is also important to consider that renting vs owning is not purely financial. In your early 20s, while building a career with no family, renting provides great flexibility and you would either limit your opportunities to where you purchased a home or you would have to deal with the inconvenience of buying and selling a home multiple times. Meanwhile, in your late 30s with a partner and kids, you probably want to settle down in an area, have the savings to cover maintenance costs, and don't want to be priced out of an area by increasing rent.

Buying a home requires knowing what you can afford and layering your personal values on top of it, rather than deciding what to buy and working backwards to justify it financially.

Taking on Debt

Debt is one of the most powerful tools in finance, yet one of the most dangerous. The difference between good debt and bad debt largely comes down to whether it helps you build wealth.

Good Debt: Finances something that either appreciates in value or generates income sufficient to cover its cost

• Mortgage

• Student Loan (High Income Potential)

• Business Loans (High-Quality Project)

Bad Debt: Finances consumption, typically things that depreciate or disappear

• Car Loan

• Student Loan (Low Income Potential)

• Business Loans (Speculative/Low Quality)

• Credit Card Debt (Carrying a Balance)

  • Credit card purchases are fine if you auto-pay the statement balance every month, avoiding interest charges

• Buy-Now-Pay-Later Arrangements

• Rent-to-Own Agreements

• Payday Loans

• Auto Title Loans

The most important question before taking on any debt is not "can I afford the payments?" but "am I okay with the total cost of this debt, including all interest over its full life?" $600/month may sound like a lot, but $30,000 certainly does, as does an extra $7,000 in interest. The problem is that people "bucket" debt differently than the rest of their expenses, and it's so normal to have a car loan that most people don't even think twice about it. Even worse is credit card interest, which is often over 20% APR. A $1,000 purchase with a $20 minimum payment (2%) would take 16 years to pay off and would cost just over $2,000.

When you have debt, every purchase is at the opportunity cost of paying that debt down further, so that lavish $5,000 trip to Europe may seem affordable while covering your $600/month car payment. However, given 8% interest on a five-year loan, using that $5,000 as an additional car payment would save $2,200 in interest and allow you to pay it off a year earlier. This does not mean you should never splurge and enjoy yourself, but do so in a financially responsible way.

What About Everything Else?

Many of these topics are covered in more detail on their own page, like cars and credit cards, so be sure to navigate back to the finance hub and find what you're looking for.