Pre-qualification and pre-approval are two names for one kind of letter
Pre-qualification and pre-approval are two names for the same kind of letter: a lender's statement that it is generally willing to lend to you, up to an amount, on assumptions it has made about your income, your savings, your debts and your credit. The Consumer Financial Protection Bureau says lenders use the two words differently. Some write a pre-qualification letter from information you report and nothing verified, and keep the word pre-approval for a letter written from verified information. Others use one word for everything. Neither letter is an offer of a loan that the lender is bound to make, and a lender may check your credit before writing either one. So the word at the top of a letter says less than what the letter states and who stands behind it. On this site the letter a loan officer writes is a pre-qualification letter, whatever was checked to write it, because nothing here is underwritten until a lender underwrites it, and the letter says so.
What our pre-qualification letter says, and what it does not
The letter states that a loan officer has reviewed what you told us and, where you agreed to it, your credit, and that a loan of a stated size appears to fit your file under a program we named. It is addressed so a seller or a listing agent can read it, and it carries the brokerage's name and license numbers. It does not say that a lender has approved you, because none has yet. It is not a commitment to lend, and it does not lock a rate. It does not bind you to any lender either: the CFPB's buying guide says the same of every such letter, and the lender is chosen later, when an offer is accepted and the Loan Estimates are in hand. A change in your income, your debts or the price of the house changes the answer. Each letter states the date it was written, and a listing agent may ask for a fresh one if an offer comes later.
What a listing agent looks for
Sellers often ask for a letter before they take an offer seriously, as the CFPB's buying guide notes, and a listing agent reads one for three things: whether someone with a license has looked at the buyer, whether the loan amount covers the offer, and whether the program named is one that closes in this market. In San Luis Obispo County that last point matters, because a price above the county's conforming limit calls for a jumbo loan, and a letter that names the wrong program tells the agent the buyer has not been placed yet. A letter from a brokerage also tells the agent that more than one lender is in play.
What we ask for to write one
Who you are and where you work, what you earn and how it is paid, what you have saved and where it sits, and what you owe each month. With your permission, your credit. For a first home we also ask whether you expect help with the down payment, because that shapes which programs fit. None of it has to be perfect on the first call, and you can start with the application on this site, which asks the same questions in order. A loan officer reads the answers, and if the file supports a letter, writes one and tells you which program it rests on and why. Ask what was assumed to write it: the CFPB's advice to every buyer is to find out whether anything in the file could change the answer later, and that is a fair question to put to us.
When the answer is not yet
Sometimes a letter would not hold up, because the income is too new, the debts are too high for the price, or the savings are not where a lender needs them to be. That is a better thing to hear before an offer than after one. A loan officer will say what would have to change and which program would then fit, and the application can be picked up again when it has. If the reason sits on your credit report, the CFPB's advice is to get a copy, look for errors and have them corrected before you try again. A letter the file cannot carry fails in underwriting.