There are no set restrictions on how long you must wait to refinance your car loan after purchasing your vehicle. However, waiting at least six months is ideal.
It can take a few months for your vehicle title to transfer over to your lender and for your credit score to rebound after opening the new loan account. Waiting several months also gives you time to improve other aspects of your credit — perhaps paying down credit cards — so you’re able to qualify for a lower interest rate.