Not true. They can give you an rate based on a range. For example, if you have a 800 credit score, they can give you a rate based on that amount. Typically for someone with a 800 credit score the rate is between 3.5%-3.75% for a 30 year fixed. I highly suggest you go to a credit union and they will be able to give you a full picture of what you can expect based on your credit score, payment history, and annual incomes.
Rates are dependent on credit score, loan to value and loan program. So it's not easy to answer the question.
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