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Young, handsome man just bought his first car.

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you might read more about oureditorial guidelinesand our products and servicesreview methodology.

However, following specific car-buying guidelines can help keep car ownership affordable.

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The 20/3/8 Car-Buying Rule

The first rule Stephan said comes from MoneyGuy.com.

Heres how the 20/3/8 rule works.

Put 20% Down

A 20% down payment will reduce the amount you must finance.

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Stephan said you may get a better loan rate by borrowing less as well.

Youll pay less interest over a 36-month loan than with thecurrent average termof 66.4 months.

MoneyGuy.comsaid you should dedicate the entire 8% to the loan payment.

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20/3/8 Rule Examples

Suppose you make $50,000 a year or $4,166 per month.

That means finding a car thats worth about $13,800 and making a down payment of around $2,760.

The 20/4/10 Car-Buying Rule

The 20/4/10 rule is similar to the 20/3/8 rule.

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It also requires a 20% down payment, but the loan is for four rather than three years.

Whichever car-buying rule you choose, the goal is to spend no more than you might afford.

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