What do your weekly habits actually cost over a lifetime?

The 10% figure is the commonly cited long-run historical average for the S&P 500 since 1957, drawn from the Damodaran database at NYU Stern. It is a nominal return and does not account for inflation. In real (inflation-adjusted) terms, the long-run average is closer to 7%. This calculator uses the nominal 10% as the default because it is the figure most commonly cited in financial planning contexts and because it allows you to change the rate and see the sensitivity yourself. For a more conservative illustration, set the rate to 7%. For historical peak periods, rates up to 14% have been achieved over 30-year windows.

This calculator makes no recommendation about your spending habits. The numbers are purely mathematical: this is what compound interest does to a recurring cash flow over time. Whether the utility you get from current spending is worth more or less than the future wealth is entirely a personal judgement that no calculator can make. The headline hook, $50/week becoming $452,000 over 30 years, is designed to make the mathematics vivid, not to pass judgment. Every pound or dollar you spend has an opportunity cost. So does every pound you save: you are trading present consumption for future wealth, and that trade-off is only worthwhile if future wealth is something you actually want.

The per-category percentiles use interpolated distributions from BLS CEX 2024 data. For alcohol, approximately 34% of the population spends $0/week, placing any non-zero spend above the 34th percentile. Spending of $1 to $12/week covers a further 48% of the population, placing the $12/week average at roughly the 60th percentile. For tobacco, approximately 85% spend nothing, so any spend at all places you above the 85th percentile. Fast food is near-universal: only around 15% of households spend close to nothing, meaning $0 spend sits near the 15th percentile and the $75 average is near the 70th percentile. Gambling figures are treated similarly to miscellaneous entertainment, with $0 at approximately the 50th percentile and $23/week near the 70th. All percentiles are approximate.

At 2024 US average cigarette prices of approximately $8.00 per pack (ranging from around $6.50 in tobacco-producing states like Virginia to over $12 in New York), a pack-a-day habit costs approximately $2,920 per year, or roughly $56 per week. Over 30 years at the S&P 500 historical average of 10%, that $56 per week in foregone investment compounds to approximately $512,000 in foregone wealth. This calculation does not include healthcare costs attributable to smoking, which the CDC estimates average approximately $230 billion per year for the US, or approximately $19,000 per smoker per lifetime in direct medical expenditure. Adding healthcare costs to the opportunity cost calculation produces a total lifetime economic impact that frequently exceeds $1 million for a lifetime smoker who starts in their twenties.

The BLS Consumer Expenditure Survey 2024 · S&P 500 returns (Damodaran) · NIH substance data

The American Gaming Association (AGA) reported that Americans spent a record $66.5 billion on commercial gambling in 2023, an 11% increase from 2022, with sports betting growing fastest following the Supreme Court's 2018 Murphy v. NCAA ruling that opened the door to state-by-state legalisation. That $66.5 billion represents gross gaming revenue (losses to players, not total amounts wagered). Divided across the approximately 218 million US adults, this equates to approximately $305 per adult per year, though the distribution is extremely skewed: a majority of adults gamble little or nothing, while a small minority account for the vast majority of losses. The National Council on Problem Gambling estimates that approximately 2.5 million Americans meet diagnostic criteria for gambling disorder, with an average annual loss of approximately $6,000 to $8,000 among this group.

Americans spent approximately $113 billion on lottery tickets in fiscal year 2023 according to the North American Association of State and Provincial Lotteries. The average US household in lottery-playing states spends approximately $400 to $600 per year on tickets, but this average again conceals a highly skewed distribution. A study by the Howard Center for Investigative Journalism found that lottery retailers are disproportionately concentrated in lower-income zip codes and that households earning under $30,000 per year spend on average 13% of their income on lottery tickets, compared with 1% for households earning over $100,000. The expected return on a lottery ticket is approximately 50 cents per dollar spent (states retain roughly half of revenues), making it one of the lowest-return forms of legal gambling by far. $10 per week in lottery spending over 30 years at 10% annual return would produce approximately $91,000 in foregone wealth.

The US legal cannabis market generated approximately $27.7 billion in sales in 2023 according to BDSA market research, with projections to reach $40 billion by 2027 as additional states complete legalisation. Regular cannabis consumers in legalised states spend on average approximately $50 to $70 per week according to New Frontier Data's Cannabis Consumer Survey 2023, though occasional users spend considerably less. The compound opportunity cost of $60 per week in cannabis spending over 30 years at 10% is approximately $543,000 in foregone wealth. Cannabis spending as a share of disposable income is highest among adults aged 18 to 34, who account for approximately 45% of all cannabis sales despite representing a smaller proportion of the population. Comparable data for the UK, where only medical cannabis is legal, is less reliable due to the illicit market structure.

Yes, and the compound interest framework makes the magnitude of moderation visible. The difference between $20 per week in alcohol spending (moderate social drinker) and $60 per week (regular heavy drinker) is $40 per week. That $40 difference, invested at 10% over 30 years, compounds to approximately $362,000. Reducing fast food spending from $100 per week to $50 per week frees up $50 per week, which compounds to approximately $452,000 over 30 years. The calculator is designed to make these marginal differences vivid, not to prescribe specific behaviour. The question is not whether you should drink or gamble at all but whether the marginal utility of your current level of spending exceeds the opportunity cost, which only you can judge.

Cross-national comparisons of vice spending show significant variation driven by price levels, taxation, and cultural norms. Tobacco spending per smoker is highest in countries like Australia and New Zealand, where a pack of cigarettes costs over AUD $40 due to excise taxes, meaning a pack-a-day smoker spends over $14,000 per year. The UK has among Europe's highest cigarette prices at approximately £12 per pack (around $15 USD), producing annual costs for pack-a-day smokers of approximately £4,400. Alcohol spending per capita is highest in European countries, particularly the UK, Ireland, and Germany, according to OECD data. Gambling losses per adult are highest in Australia at approximately $1,000 AUD per year per adult, the highest in the world by most estimates, attributed partly to the prevalence of "pokies" (electronic gaming machines) with liberal regulatory frameworks.

Beyond individual opportunity cost, vices impose substantial social costs that are largely externalised to healthcare systems, employers, and governments. The CDC estimates the combined economic burden of smoking ($300 billion), excessive alcohol use ($249 billion), and drug use ($272 billion, including legal prescription opioids) at over $820 billion per year in the United States, a figure dominated by lost productivity rather than direct healthcare costs. Problem gambling adds a further $7 billion per year in social costs according to the National Council on Problem Gambling. These social costs create a significant gap between private spending decisions and collective costs, which is the primary economic justification for excise taxes on tobacco, alcohol, and gambling. A University of Chicago study estimated that social costs of a pack of cigarettes exceed the private cost by approximately $35, meaning cigarette prices would need to be $40 or more per pack to fully internalise the externalities.

From a purely financial perspective, the sooner the spending is eliminated the greater the compound benefit, since each additional year of reduced spending has more years to compound. However, the financial calculation is only relevant if the reduction is actually sustained: research on habit change consistently shows that gradual reduction produces more durable long-term behaviour change than abrupt cessation for many consumptive habits. A Cochrane review of smoking cessation methods found that abrupt cessation was marginally more effective than gradual reduction specifically for nicotine dependence, but for habitual spending on food and alcohol, gradual substitution strategies produce more durable outcomes. The framing that matters most for the calculator is not the method of reduction but where you currently sit relative to your peers, which provides the context for deciding whether a change is worth pursuing.