Credit is the part of home buying people are most anxious about and most misinformed about.
The anxiety is usually worse than the reality. I have had buyers delay for a year because they assumed they would not qualify, then find out they would have qualified all along.
Here is what your score actually does, what is worth fixing, and what to leave alone.
A caveat. I am a REALTOR, not a lender or a credit counselor. Program requirements change, and your specific answer comes from a lender pulling your actual file. What follows is the practical framing so you can have that conversation productively.
What the score actually affects
Two things, and they are worth separating.
Whether you qualify at all, which depends on the loan program. Different programs have different tolerances, which is one of the main practical differences between them. Down payment options for Indiana buyers covers how they differ.
The rate you are offered, which is where most of the money is. Over thirty years, a rate difference compounds into a substantial amount, and it shows up in your monthly payment forever.
That second point is why credit preparation is often worth more than an equivalent period of extra saving. A few months of deliberate work on a file can be worth more than a few months of adding to the down payment. Not always, and often enough to ask.
Your score also affects mortgage insurance pricing on some programs, which is an additional monthly effect people do not anticipate.
Start by looking at the actual report
Not the score your card app shows you. The full reports, from all three bureaus, which you are entitled to obtain for free. The Consumer Financial Protection Bureau explains how to get them and what to do about errors.
Look for accounts you do not recognize. Balances that are wrong. Accounts reported as late that were not. Old items that should have aged off. Duplicate reporting of the same debt.
Errors are more common than people expect, and disputing them is free. It also takes time, which is the argument for doing this early rather than the week before you apply.
The scores lenders use for mortgages can differ from the consumer facing score you are used to seeing, so do not be alarmed if the number a lender quotes is not the one on your app.
What actually moves a score
In rough order of practical impact for someone preparing to buy.
Payment history. On time payments matter most, and late payments hurt most. Nothing here is fast, and it is why starting early matters.
Balances relative to limits on revolving accounts. This is the fastest lever available. Carrying balances close to the limit suppresses a score even when payments are perfect. Paying balances down, on the cards with the highest utilization first, can produce visible improvement within a cycle or two.
Length of credit history. Older accounts help, which is why closing a card you have had for fifteen years is usually counterproductive even though it feels tidy.
New credit and inquiries. Each new account is a small drag and a lot of new accounts is a large one.
Mix of credit types, which matters least and is not worth engineering.
What not to do
These are the well intentioned moves that backfire, and I see all of them.
Do not close old accounts. It shortens your history and it raises your utilization ratio by removing available credit. If you want to stop using a card, stop using it and leave it open.
Do not open new credit to build history. It does the opposite in the short run, and the short run is what you are in.
Do not pay off a collection without asking your lender first. Depending on the situation and the program, the handling matters and the order matters.
Do not use a credit repair service that promises to remove accurate information. Accurate items cannot be removed by anyone, and the CFPB is the right place to learn what is genuinely possible.
Do not drain your savings to pay down debt. Lenders look at reserves too, and arriving at closing with nothing in the bank creates its own problem. Down payment options for Indiana buyers and closing costs cover how much cash actually needs to be there.
Rate shopping does not hurt you
This is worth stating plainly because the fear of it costs people money.
Scoring models treat multiple mortgage inquiries within a short window as a single event, specifically so borrowers can compare offers. You are meant to shop.
So talk to more than one lender. Rates, fees, and competence all vary. Ask each for a written comparison of the programs you qualify for, including the full monthly payment with taxes, insurance, and any mortgage insurance included.
Do the shopping in a compact period rather than spread over months, and you get the benefit of the rule.
The window between approval and closing
This is where I see otherwise smooth purchases fall apart, and it is entirely preventable.
Your credit gets checked again before closing. Not the letter, the actual file. So the rule from pre-approval to keys is simple: change nothing financial without asking first.
No new credit. Not a card for moving expenses, not financing for furniture, not a car loan for the new commute. Furniture stores near a closing date are not an accident.
No large unexplained deposits. Gift money, proceeds from selling something, anything unusual needs documentation. Not prohibited, documented. Tell your lender in advance and it is a non event.
No moving money between accounts unnecessarily, because someone will have to reconstruct the trail.
No job changes if you can avoid it, and tell your lender immediately if one is coming.
The timeline after you accept an offer covers the rest of that stretch.
If your credit is genuinely not ready
Sometimes the answer is that a few months of work will change what you can buy. That is a real and worthwhile plan, and it is different from waiting indefinitely.
Get a specific target from a lender. Which score, and what would it change about the rate or the program available to you. A vague goal of improving credit produces vague effort. A specific one produces a plan.
Work on utilization first, because it moves fastest. Then keep everything current, without exception, for the intervening months.
Meanwhile, keep saving and keep learning the market. Understanding what your money reaches here, and where, means you are ready to act rather than starting from scratch. The complete guide to buying in Lafayette and the neighborhoods guide are both useful during a waiting period.
And set a date to re-check rather than leaving it open ended. Ninety days is a reasonable interval.
The thing I most want you to hear
Do not disqualify yourself. The most expensive credit mistake I see is not a low score. It is a buyer who assumed they would not qualify, never asked, and rented for three more years.
A conversation with a lender is free, takes half an hour, and gives you a real answer instead of a fear. Even if the answer is not yet, you leave with a plan and a timeline rather than a vague sense that homeownership is for other people.
If you want an introduction to lenders here who will give you a straight answer without a sales pitch, I am glad to make one. Grab a time on my calendar. A real person reads every message, and there is no pressure either way. Let's get you home.