economy
This popular car-buying rule isn't realistic for most Americans—here's the income needed to make it work
Even used-car buyers may need a six-figure income to follow this popular car-buying rule.
TL;DR
- The 20-4-10 rule (20% down, 4-year loan, 10% of income for transport) is no longer realistic due to increased car prices and longer loan terms.
- Following the 20-4-10 rule for a used car requires an annual income of roughly $120,000, and for a new car, about $175,000.
- The median U.S. household income in 2024 was approximately $83,730, making the 10% transportation cost guideline difficult to meet.
- Experts advise shifting focus from monthly payments to total transportation costs as a percentage of gross income, suggesting 12-15% as a more realistic target.
- Buying a reliable, 3-5 year old used car is recommended as a way to manage auto loan costs.