To fill in the blanks in your example, we would typically reference a formula or guideline that relates car expenses to income. A common rule of thumb suggests that individuals should spend about 15% of their annual income on a car, including both the purchase price and ongoing costs.
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If an individual earned $50,000 last year and purchased a new car, you would expect that person to have paid about $7,500 for the car (15% of $50,000).
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Conversely, if someone just paid $20,000 for a car, you could use this guideline to estimate that this person's income was probably around $133,333 (since $20,000 is 15% of this amount).
In summary:
- Expect to pay about $7,500 for the car if earning $50,000.
- Estimate that an income was around $133,333 if someone paid $20,000 for a car.