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Instead of buying a $24,000 car in 2009, you could have invested the $24,000 in the S&P 500. If you did, you would now have almost $100,000 in 2022. That’s quite an opportunity cost for buying a new car!

Buying too much car is one of the easiest and biggest financial mistakes someone can make. Besides the purchase price of a car, you’ve got to also pay car insurance, maintenance, parking tickets, and traffic tickets.

When you add everything up, I’m pretty sure you’ll be shocked at how much it really costs to own a car and hurl. After more than 10 years, the 1/10th rule for car buying has become the standard car buying rule for financial freedom seekers everywhere.

The Car Buying Rule To Follow: The 1/10th Rule

The #1 car buying rule to follow is my 1/10th Rule for car buying. The rule states that you should spend no more than 1/10th your gross annual income on the purchase price of a car. The car can be new or old. It doesn’t matter so long as the car costs 10% of your annual gross income or less.

If you make the median per capita income of ~$42,000 a year, limit your vehicle purchase price to $4,200. If your family earns the median household income of $68,000 a year, then limit your car purchase price to $6,800. Absolutely do not go and spend $39,950, the absurdly high median new car price today!

If you absolutely want to buy a car that costs $39,950, then shoot to make at least $399,500 a year in household income. You might scoff at the necessity to make such a high amount. However, it takes at least $300,000 a year to live a middle class lifestyle with a family today.

Minimize Your Financial Stress With A Cheaper Car

If you actually want to save for college, save for retirement, take care of your parents, buy a home, and not stress out about money when you’re old, please keep your car purchase to at most 10% of your annual gross income.

Once you buy a car following my 1/10th rule, own your car for at least five years. Better yet, shoot to own it fo 10 years. Don’t go selling your car every 2-3 years like most Americans do. If you do, you don’t experience the full value of the car. Further, you end up paying wasteful sales taxes each time you buy a new or new used car.

Buying a car you cannot afford is the #1 way to financial mediocrity. Since Financial Samurai was founded in 2009, my goal is to help readers achieve financial freedom sooner, rather than later. Ideally, I’d like every reader to achieve an above average net worth for their age.

Financial independence is worth it. A car you cannot comfortably afford is a great headwind.

Why You Shouldn’t Spend More Than 10% Gross On A Car

If you want to achieve financial freedom, let’s go through specific reasons why you should follow my 1/10th rule for car buying.

1) Maintenance costs

The more you drive, the more you will pay to maintain your vehicle. With thousands of parts per car, something will inevitably break or need upgrading.

Not only do you have to pay for maintenance costs, you’ve also got to pay for insurance, parking tickets, and traffic tickets. Further, the thrill of owning a new or new used car lasts for only several months. However, the pain of paying the same car payment lasts for years.