You are buying a home and have enough money in your bank account for the down payment and closing costs. Then the mortgage team asks about a deposit on your statement. It might be a family contribution, proceeds from selling a car, or money moved from another account you own. Why does the lender care where it came from if the funds are already in your account?
Mortgage underwriting must verify that the money used to complete the purchase comes from an acceptable source. A deposit may also represent a new loan that affects your debt payments. The question is usually about documenting the trail, not an accusation that the funds are improper. The easiest response is to tell your loan team the source early and provide records that connect the money to your account.
Here is how to prepare without guessing what the underwriter wants.
Why the lender reviews bank statements
The lender verifies money available for the down payment, closing costs, and any required reserves. It also evaluates the borrower’s debts and ability to repay the mortgage. A bank balance alone does not reveal whether a recent increase came from wages, a permitted gift, an asset sale, another account, or money borrowed from a source that has not been disclosed.
Fannie Mae’s depository account guidance states that unverified funds are not acceptable for down payment, closing costs, or reserves under its rules. It also directs lenders to investigate indications of borrowed funds. Other loan programs can have different requirements and documentation methods, so your lender’s request should govern the documents you submit.
This review is especially relevant during a purchase because the lender needs confidence that funds used at closing are eligible and available. It is separate from whether you have enough income to make the monthly payment.
What counts as a large deposit?
There is no one dollar amount that every mortgage program applies to every borrower. As a concrete conventional loan example, Fannie Mae defines a large deposit as a single deposit exceeding 50% of the loan’s total monthly qualifying income when bank statements are used. Its purchase transaction guidance says that when funds from such a deposit are needed for the down payment, closing costs, or reserves, the lender must document an acceptable source.
Suppose the qualifying monthly income used for a particular loan is $8,000. Under that Fannie Mae definition, a single deposit above $4,000 would meet the large deposit threshold. That calculation is an illustration of one investor’s rule, not a promise that deposits below $4,000 will never be questioned or that another loan program uses the same test. Multiple transactions, account activity, or signs of borrowed funds may call for review too.
The underwriter may also determine that a deposit does not need to be counted if the buyer already has enough separately verified money to meet the loan’s requirements. That is a lender decision. Do not omit a deposit from the statements or assume the underwriter will ignore it.
Common sources and useful records
The right paperwork depends on the actual source. Tell the mortgage team what happened, then ask which documents are needed for the selected loan program.
Transfer between your own accounts: Statements for both accounts may show the withdrawal and matching deposit, along with your ownership of the source account. A screenshot of the receiving balance alone may not establish where the funds originated.
Sale of a car or other asset: A bill of sale or other proof of ownership, the payment record, and the deposit record can help connect the proceeds to the account. The lender may ask questions if the asset sale or amount cannot be reasonably documented.
Gift from a family member: The program may require an eligible donor, a signed gift letter, and evidence of transfer or receipt. A gift should not secretly be a loan you have agreed to repay. See The Faille Team’s guide to using gift funds to buy a home for the separate gift documentation process.
Bonus, commission, or other employment payment: Pay records and the employer’s documentation may help identify the deposit. The lender may still analyze the income separately if it is being used to qualify for the mortgage.
Refund, insurance payment, or settlement proceeds: Keep the statement or letter explaining the payment, plus the transaction record showing the money entering your account. The underwriter decides whether and how that source can be used.
Cash from a personal sale or savings kept outside a bank: This can be harder to verify because an explanation alone may not establish the origin of physical cash. Tell the lender before depositing it or relying on it for closing. Do not break a deposit into smaller amounts in an attempt to avoid questions. That does not solve the documentation problem and can create additional concerns.
These are examples, not a list of automatically acceptable funds. The lender must review the evidence under the applicable program rules.
Write a clear explanation when requested
A letter of explanation can be useful, but it should be accurate and supported by records. Identify the deposit date and amount, the source, the reason the money was received, and whether any repayment obligation exists. Keep it concise. Attach the documents the loan team requests rather than sending a long narrative with no transaction trail.
For example: “The $7,500 deposit on August 12 was the proceeds from the sale of my vehicle. The attached bill of sale and bank transaction record show the buyer’s payment and the deposit.” That statement gives the underwriter a specific event to verify. The lender may ask for additional records depending on the transaction.
Do not say that borrowed money was a gift. Do not create a bill of sale after the fact that does not reflect the real transaction. If you do not have the records, explain what is available and ask your loan officer about the next step. Underwriting may use reasonable judgment in some circumstances, but the borrower should not decide unilaterally that a missing record is unnecessary.
Does a large deposit always delay closing?
No. A deposit with a clear source and a prompt response may be resolved as part of the ordinary review. Delays happen when the lender discovers the transaction late, the documentation does not connect the source to the account, the money is not eligible, or the deposit turns out to be a new debt.
Before moving money or receiving a large contribution near closing, tell the loan team. Ask how to document the transaction and whether it should go into your account or be handled another permitted way. Do not assume an earlier preapproval settles the source of all funds that arrive later. The underwriter may request updated statements before final approval.
The Faille Team’s mortgage documentation overview explains how asset, income, and employment information fits into the broader loan process. Keeping records organized at the start reduces last-minute follow-up.
What about money borrowed from a family member?
Borrowed funds are different from an eligible gift. A personal loan can add a monthly payment that affects qualification, and the loan program may restrict using borrowed money for the required down payment or closing costs. The lender needs to know the source and terms, even if the family member does not charge interest.
If a relative offers to help, decide honestly whether the funds are a gift or a loan. Ask the mortgage professional what the chosen program allows before accepting or transferring money. A gift letter stating there is no obligation to repay cannot accurately describe a side agreement to make payments later.
The same principle applies to a credit card cash advance or a new personal loan. It can change both available assets and reported liabilities. Taking on new debt shortly before closing may alter the underwriter’s decision, even when the deposit makes your account balance look stronger.
A practical record-keeping plan
Before applying: Identify where your down payment and closing money is held. Keep statements for the accounts involved. Tell the loan team about expected gifts, asset sales, or unusual transfers.
While under contract: Avoid moving money through several accounts without a reason. If a transfer is necessary, preserve statements and confirmations for both sides. Ask before depositing cash that will be needed for closing.
When the lender asks: Reply with the exact deposit, source, and supporting documents requested. If a record is unavailable, say so promptly instead of waiting until the next underwriting review.
Before wiring closing funds: Confirm with the lender which account will be used and what balance must be verified. Separately verify any closing wire instructions through a trusted phone number. The source of funds and the security of the final payment are two different issues.
Avoid sending unnecessary account numbers or sensitive documents through an unapproved channel. Use the secure upload process your mortgage team provides.
Frequently asked questions
Will a large deposit cause my mortgage application to be denied?
Not automatically. The lender needs to determine whether the money comes from an acceptable source and whether any new debt is involved. Clear documentation can often answer the question. If the funds are not eligible, the lender can explain whether another verified source is available.
Are transfers from my own savings account acceptable?
They may be, but the lender may ask for statements showing that you own the source account and tracing the transfer. Provide both sides of the transaction if requested.
Can I use cash I saved at home for my down payment?
Physical cash can be difficult to verify under many mortgage programs. Tell the loan team how much you have and how it was accumulated before relying on it. Do not assume that depositing it now makes it an acceptable source.
Does the 50% threshold apply to every loan?
No. It is a definition from Fannie Mae’s depository account guidance in a particular context. FHA, VA, USDA, jumbo, and individual lenders may use different rules or request additional documentation. Ask about your actual loan.
Can the lender ask about a deposit after preapproval?
Yes. Preapproval is based on the information reviewed at that point. The lender may obtain updated statements and verify assets again during underwriting or before closing.
Give the underwriter a clear money trail
The best preparation is to know where your closing funds came from and keep the records that show their path to your account. The Thomas Faille Mortgage Team, operating under Novus Home Mortgage, helps borrowers work through documentation and loan choices with clear communication. If a deposit, gift, or asset sale is part of your purchase plan, contact The Faille Team before you move the money so the team can explain what your loan program may require.
Reference material: Fannie Mae Selling Guide, Depository Accounts and Evaluating Large Deposits.
This article provides general information. Deposit documentation and eligible sources depend on the loan program, lender, and individual transaction.
