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Financial experts generally recommend keeping auto loans to 60 months (5 years) or less. Longer terms like 72 or 84 months lower your monthly payment, but you pay significantly more in interest and risk being "upside-down" — owing more than the car is worth — since cars depreciate quickly. A 48-month loan is ideal if your budget allows it, minimizing interest while keeping payments manageable.

As of 2025–2026, good rates for new cars range from 4%–6% for borrowers with excellent credit (750+). Used car rates are typically 1%–2% higher. Borrowers with fair credit (650–699) may see rates of 7%–10%, while subprime borrowers could face 12%+. Credit unions and online lenders often offer better rates than dealership financing. Always get pre-approved before visiting the dealer so you have leverage to negotiate.

In most U.S. states, yes. The sales tax is calculated on the difference between the new car price and your trade-in value, not on the full purchase price. For example, buying a $35,000 car with a $10,000 trade-in means you only pay tax on $25,000 in most states. However, a few states (California, Hawaii, and others) tax the full purchase price regardless of trade-in. Check your state's rules.

Yes, a down payment of at least 10%–20% is recommended. It reduces your loan amount, monthly payment, and total interest. It also helps prevent negative equity — where you owe more than the car is worth. If you have a trade-in, its value can serve as your down payment. Avoid putting $0 down unless you have a very low interest rate and strong financial reserves.