What a mortgage pre-approval is
and why sellers ask for one.

A pre-approval is a lender's conditional statement of how much they will lend you, worked out from documents they have actually looked at, starting with your credit and what you earn. The word doing the work is verified. The lender has seen the paperwork behind the numbers, which is why the letter carries weight with somebody on the other side of a transaction who has to decide whether your offer can close.

A pre-qualification is the lighter version of the same idea. It runs off numbers you report about yourself, without the documents behind them, and it produces a rough figure. It is a reasonable way to start a conversation with a lender and get a sense of the range. It is not what a listing agent is asking for when they ask for a letter, and the two words sound similar enough that buyers regularly bring one thinking it is the other.

Neither one is the last step. After you are under contract, the file goes through underwriting, and what comes out is a commitment letter: the lender's formal promise to fund the loan, usually with a list of conditions still to satisfy. New Jersey contracts typically set a deadline for that commitment, which is one of the dates a buyer actually has to watch. Pre-approval opens the door; the commitment is what closes the loan.

The practical sequence for a South Jersey buyer is short. Get your documents to a lender before you start touring, so the letter exists when a house you want appears. Understand that the amount on the letter is a ceiling the lender is willing to consider, not a number you have to spend or a promise about a monthly payment. Then keep your financial picture still while you are under contract, because underwriting looks again.

What to ask, and who answers it: your lender is the one who tells you what you qualify for, what the letter is conditioned on, and what could change it between now and closing. Your agent can tell you how the letter is read on the other side and how it fits the timeline of an offer. Nothing here is a quote or a commitment from anyone.