Mortgage Pre-Approval Checklist for Michigan Home Buyers

A mortgage pre-approval letter tells sellers and agents how much a lender is generally willing to lend you, based on a real review of your finances — not numbers you typed into a calculator. For first-time buyers, it's the document that makes your offer competitive, and it requires proof of income, assets, debt, and identity. In a market like Bay City, where move-in-ready starter homes draw multiple offers, a pre-approval letter is what separates a serious buyer from a tire-kicker. Gather it once, correctly, and you'll move from application to house hunting in days instead of weeks.

What documents do you need for mortgage pre-approval?

Lenders ask for the same four categories of documents no matter where you buy: identification, proof of income, asset statements, and a list of your debts. As a Bay City REALTOR, I tell every first-time buyer the same thing: the paperwork is how the lender confirms your income and assets are real and stable — and it's what your file is judged on. Borrowers applying for pre-approval will likely need documents such as W-2s, bank statements, a credit report and tax returns (Lower) — though the exact list varies by lender and loan type.

The paperwork exists to answer one question: can you actually afford this loan, and is the income that pays for it real and stable? Each document verifies a different part of that story.

Proof of income: what shows you can make the payments

Income documents are the heart of a pre-approval because they show the lender you earn enough to cover the mortgage every month. For a salaried employee, that means your two most recent pay stubs, W-2s for the last two years, and your last two years of tax returns, plus your employer's name and contact information (Lower). Lenders typically ask to see pay stubs from at least the last 30 days.

Lenders love consistency in employment. If you've recently switched jobs, a move within the same industry at similar pay usually proceeds as expected, but a change in industry or pay structure may prompt a reassessment of your situation, according to Rocket Mortgage.

Self-employed buyers face a longer paper trail. Because the lender has to verify income stability and how business income is treated on taxes, you'll generally need personal and business tax returns, a year-to-date profit-and-loss statement, a balance sheet, or business bank statements (Lower). A borrower whose income shows up on a 1099, a K-1, or a Schedule C must produce a year-to-date profit-and-loss statement signed and dated within 60 days of application, plus the most recent two business tax returns (Fellowship Home Loans).

Proof of assets: showing you have the cash to close

Asset documents prove you have money saved for the down payment and closing costs, plus a cushion if your income is ever interrupted. You'll generally be asked for checking and savings account statements for the last two months, and lenders may also want to review statements from investment and retirement accounts like 401(k)s, IRAs, stocks, and bonds over the same period (Rocket Mortgage). What the lender is really scrutinizing is the trend: a steady, growing balance reads as savings discipline, while a balance that dips into overdraft every month raises a flag about whether the mortgage payment will be affordable.

Two months of statements lets the lender spot large or unexplained deposits. A deposit larger than 50% of your monthly income triggers a letter of explanation, and an undocumented source of funds can force the lender to reissue its Loan Estimate, restarting a waiting period that pushes your close back (Fellowship Home Loans). That's why it pays to keep your money in one or two accounts during the process and to avoid moving large sums around right before you apply.

Proof of debt: the numbers behind your debt-to-income ratio

The debt list tells the lender how much of your income is already committed. Your debt-to-income (DTI) ratio compares your monthly debt payments to your gross monthly income — you add up all your monthly payments and divide by your income. The maximum allowed varies by loan type, and while it's possible to get a mortgage with a DTI as high as 50%, it's advisable to keep it below 36% (Rocket Mortgage). Lenders scan this list less for the exact balances and more for the pattern: minimum-only credit card payments and a student loan that keeps growing tell a different story than debts being paid down steadily.

You'll be asked for a list of fixed, recurring debts: credit cards, auto loans, student loans, personal loans, rent, and any child support or alimony you pay. The lender also pulls your credit report on its own once you give permission, and in many cases you'll need a credit score of at least 620 for a conventional mortgage pre-approval (Rocket Mortgage).

Identification and the paperwork buyers forget

Identity documents are simple but non-negotiable: a government-issued photo ID like a driver's license or passport, plus your Social Security number. Some lenders also want to see the physical Social Security card to match the number against your ID (Rocket Mortgage).

Beyond the standard stack, three documents trip up more applications than any others. According to Fellowship Home Loans, roughly 60% of post-application stipulation requests come from these three: a letter of explanation (required for any inconsistency, like a 30-day late payment years ago, a job gap, or a large deposit), a gift letter with a paper trail (when family money funds your down payment), and a year-to-date profit-and-loss statement for self-employed borrowers.

A gift letter must state the dollar amount, the relationship, and that no repayment is expected — and you pair it with a copy of the donor's bank statement and a deposit receipt from the day the funds landed (Fellowship Home Loans). Verbal reassurances that a parent is helping don't count.

Why Michigan's down payment programs change your paperwork

If you're a first-time buyer, the documents you need may shift depending on the Michigan State Housing Development Authority (MSHDA) program you use. The flagship MI Home Loan is a 30-year fixed-rate mortgage for first-time home buyers that can be underwritten as a conventional, FHA, VA, or USDA loan, with a 640 minimum credit score and a maximum sale price of $566,355 (ConsumerAffairs). It pairs with the MI 10K Down Payment Assistance program, which provides up to $10,000 in an interest-free loan you can use toward your down payment, closing costs, or prepaid expenses (ConsumerAffairs).

That down payment assistance can come as gifted or borrowed funds, which is exactly when the gift letter and its paper trail become essential. If a family member helps you, the lender needs a signed gift letter stating the amount, the relationship, and that no repayment is expected, plus proof the money left the donor's account (Fellowship Home Loans).

Some MSHDA programs are paused while they wait for fresh funding — including the MSHDA Rate Relief Mortgage Program and the MSHDA First-Generation Down Payment Assistance Program (ConsumerAffairs). A local lender who works with MSHDA-approved programs can tell you what's currently open and what documentation your specific loan type requires, because the list genuinely changes by program.

Your pre-approval checklist, ready to gather

Here's the complete list to bring to your first lender conversation. This is a lot of paperwork the first time, but most of it is easy to pull from a payroll portal and your bank app. It matches the document categories lenders review — income, assets, debt, and identity — as Lower outlines for pre-approval, and each item verifies a different part of your ability to repay.

1. Identification: Government-issued photo ID and Social Security number (or card)

2. Income: Two most recent pay stubs, two years of W-2s, two years of tax returns, employer contact info

3. Self-employed add-ons: Two years of business tax returns and a year-to-date profit-and-loss statement

4. Assets: Two months of checking and savings statements, plus investment and retirement statements

5. Debt: List of credit cards, auto and student loans, and other monthly payments

6. Rental history: Landlord contact information and proof of on-time rent payments, if you rent

7. Letter of explanation: Written on anything that raises a question — a job gap, a large deposit, an old late payment

8. Gift letter with paper trail: Only if family funds part of your down payment

The smartest move is to organize these into a single digital folder, named and dated, before you apply. Borrowers who arrive with a clean file save the underwriter a phone call and shave days off the timeline.

What happens after pre-approval

A pre-approval letter is a strong starting point, but it is not a final loan offer. After you make an offer and the property is under contract, the loan still goes through underwriting, an appraisal, a title review, and a fresh credit and employment check before closing (Lower). Your financial picture can change between pre-approval and closing, so don't open new credit, change jobs, or move large sums of money in the meantime.

Pre-approval letters also expire — many are valid for a limited time, often 30 to 60 days, and may need to be refreshed (Lower). If yours lapses while you're still house hunting, you'll simply reissue it with updated documents.

If you're starting this process in the Bay City area and want a local hand holding yours through it, I'd be glad to walk you through the paperwork and connect you with lenders who know the MSHDA programs inside out. Pre-approval feels like a mountain of forms, but it's really just your financial story told clearly, once, so a lender can say yes with confidence.