A Sourced vs Unexplained Contract Payment on a Bank Statement Loan

The Quick Read: A contract payment that traces to a signed agreement, an invoice, and a payer record usually stays in qualifying income, while the same deposit with no paper behind it is usually left out or triggers a document request. Proof decides the outcome, not the size of the deposit. Underwriters generally land on one of three results: counted, asked for paper, or excluded.

• A sourced payment ties to a contract, an invoice, and a payer record that match the statement.
• An unexplained payment is usually excluded from the income average, not treated as an automatic denial.
• A letter of explanation does not replace third-party records.
• Business-account deposits are typically reduced by a lender expense factor; personal-account deposits typically are not.
• A one-time payment can be real money and still not count as recurring income.

This piece is for self-employed borrowers, contractors, consultants, and loan-out earners whose deposits arrive in lumps. Across Lendmire’s wholesale network, bank statement files qualify on documented income under the applicable program, subject to lender guidelines. The deposit review is where lumpy contract income either holds up or falls out.

The Honest Answer: Who Each Path Is Really For

A sourced payment is for the borrower who keeps contract revenue flowing through one identifiable account and can hand over the agreement and invoice on request. An unexplained payment is not a “path” anyone chooses. It is what a file looks like when the paper is missing, mismatched, or still in a drawer.

The practical difference shows up in the income number. When the payment is sourced, it joins the averaged deposits and supports a larger qualifying income. When it is unexplained, the underwriter typically either asks for documents or removes it, and the income number shrinks. A smaller number can mean a smaller loan amount.

Side-by-Side

The table describes how files typically behave across the network. Each lender’s program sheet governs the details, and every file is underwritten individually.

Key Terms Defined

Sourced deposit: A deposit the file can trace to a documented origin, such as a client invoice or contract payout.

Unexplained deposit: A deposit the underwriter cannot tie to earned income, an asset, or the borrower’s own accounts.

Seasoned funds: Money that has sat in the account long enough to read as the borrower’s own.

Letter of explanation: A written statement from the borrower describing a deposit. It supports paper but does not replace it.

Expense factor: A percentage a lender applies to business-account deposits to account for the cost of running the business. Lenders set it by program.

Averaging: Dividing eligible deposits over the statement window to get a monthly qualifying income.

What “Sourced” Actually Means for a Contract Payment

A contract payment is sourced when every link from the client to your statement can be shown on paper. The underwriter wants to see the same story told by several documents, with matching amounts and names.

The usual proof set:

1. The agreement. A signed contract or statement of work that names the parties and the payment terms.

2. The invoice. An invoice that matches the contract and the deposit amount.

3. The payer. A payer name on the statement or remittance that matches the client on the contract.

4. The payment record. A wire confirmation, remittance advice, or a 1099 from the client.

5. The tie-out. A simple note connecting the invoice number to the statement line.

Milestone-based contractors are expected to show lumpy deposits. A draw that arrives on a construction schedule is not suspicious by itself. What matters is that the pattern fits the business and each lump has paper behind it.

The federal baseline points the same direction. Under Regulation Z § 1026.43, a creditor must make a reasonable, good-faith determination of repayment ability and verify the income it relies on with third-party records. The rule does not set a large-deposit threshold or a sourcing procedure. Those are program-level choices. It only requires that whatever income is counted rests on reliable records.

What Makes a Payment “Unexplained”

A payment is unexplained when the file cannot connect it to earned income. Four situations cause most of the trouble.

• Missing paper. The deposit is real, but no contract or invoice exists, or it can’t be found.
• A mismatch. The invoice says one amount and the deposit says another, or the payer name differs from the client on the contract.
• An unfamiliar payer. A third party paid on the client’s behalf and nothing shows the link.
• A pattern break. One deposit far larger than anything else on twelve months of statements, with no matching work.

An unexplained deposit does not usually kill a loan. It more commonly gets excluded from income or triggers a document request. The damage is to the income average, not necessarily to the whole file.

Here is the catch with letters. A letter of explanation alone does not substitute for third-party records. The CFPB’s small-entity compliance guide says a creditor cannot rely on what a borrower says orally about income, and that a profit-and-loss statement can be used when a third-party accountant prepared or reviewed it. The same logic carries to a written narrative. Paper beats letter.

One Payment, Two Outcomes

Run the numbers this way, with no dollar amounts. Picture a consultant with twelve months of business statements. One month shows a deposit several times the size of a typical month.

Path one, sourced. The consultant supplies the signed agreement, the matching invoice, and the client’s remittance. The payer name matches. The underwriter reads it as earned revenue and keeps it in the pool. Because it sits on a business account, the lender’s expense factor reduces it along with every other deposit. The averaged income reflects the payment.

Path two, unexplained. The same deposit arrives, but the consultant offers only a written note. The underwriter asks for the contract and invoice. They don’t exist in usable form. The deposit comes out of the average. The qualifying income drops, and the loan amount the file can support drops with it.

Same money, same account, same month. Only the documentation changed.

Income Test vs. Asset Test

The same deposit can be judged differently depending on what it is being used for.

This distinction trips up borrowers. A one-time contract payment can be fully documented and still be treated as a lump, not recurring income. It is real money for reserves and cash to close once traced. It is a weaker input for the averaged income. Sourcing funds for the down payment and reserves is its own question from sourcing for income.

Edge Cases That Change the Outcome

Pass-through money. Contractors who receive money meant for subcontractors, materials, or vendors may see that money excluded or documented line by line. Treatment varies by lender.

Retainers and customer deposits. A deposit for future work is not yet earned revenue. Expect questions about whether it is income or held money.

Owner draws and entity pay. Money moved from the borrower’s own business into a personal account counts once. Programs differ on how they handle it on personal statements.

Mixed accounts. Commingled personal and business activity is often read as a business account. Some lenders will not allow mixed accounts, and others will. Clean separation removes the question.

Third-party payers. If a payer’s parent company or a payment platform sends the money, the file needs a document linking it to the client.

Loan-out entities. When pay routes through an entity, the file needs the transfer chain from the payer to the entity to the account being qualified.

Timing near application. A large deposit that lands just before the file goes in has the least history behind it. The longer it has sat and the clearer its source, the fewer questions it raises.

How to Respond When a Deposit Is Flagged

Underwriters flag large or irregular deposits and ask for explanations. A clean response sends everything at once.

1. Identify the deposit. Note the date, amount, and statement line.

2. Attach the paper. Send the contract, invoice, and payment record together.

3. Add a short tie-out. One or two sentences linking the invoice number to the deposit.

4. Explain only what paper cannot. A brief letter can cover context, such as why a milestone paid in one lump.

5. If the paper does not exist, ask the client for a payment confirmation or pull a bank wire record. Third-party records carry weight that a narrative does not.

A letter built for a contract payment stays short: who paid, for what work, under which agreement, on which invoice, and where the paper is attached. It should agree with the documents. When the letter and the paper disagree, the paper wins and the disagreement becomes its own question.

When a Sourced Payment Is the Better Fit

A sourced payment fits the borrower who wants the deposit to carry weight in the income number. It works best when:

• The contract revenue runs through one identifiable account.
• The agreement, invoice, and remittance are on hand before the file goes in.
• The pattern fits the business, such as milestone draws for a contractor.
• The property is a primary residence or second home, where documented income is the basis.

On primary residence purchase and rate-term loans, select lenders in the network go up to 90% LTV, and stronger files earn the top of that range. On an owner-occupied cash-out, a primary residence tops out at 80% LTV with a fixed expense ratio (75% with an accountant-prepared ratio), and a second home at 75% LTV. Loan sizes run roughly $125,000 to $3,500,000, and reserves commonly run around six months of the housing payment. These are typical ranges, subject to lender guidelines and credit, not commitments to lend.

Lendmire’s complete DSCR loans guide covers the alternative path for pure rentals, where qualification does not rest on the borrower’s deposits.

When an Unexplained Payment Is the Better Fit

No borrower wants an unexplained payment. But some files are better off treating one honestly than forcing it in.

• The paper truly does not exist. If a client paid informally and cannot confirm it, leave the deposit out of the income calculation and qualify on what is documented.
• The payment is a one-time asset sale. Even when documented, it is typically excluded from the averaged income. It may still help with reserves.
• The deposit is a transfer or refund. Transfers between your own accounts and refunds are typically removed anyway.

In each case, the unexplained deposit costs only the income it would have added. A file that qualifies without it is cleaner than one that leans on a deposit nobody can support. And if the lumpy contract income is the whole problem, a self-employed investor buying a pure rental may find the property-income route cleaner. Because that path tests the property’s rent against its obligation, deposit sourcing is not its centerpiece, though assets and reserves are still reviewed. Occupancy often decides it. Lendmire’s piece Bank Statement vs Conventional Documentation and Down Payment Differences covers the paperwork side in more detail.

A bank statement loan on a non-owner-occupied rental, including a short-term rental, is business-purpose and exempt from TRID. An owner-occupied file is a consumer mortgage, and TRID applies. Occupancy sets the regime, so the property determines which one governs.

A Prep Checklist Before You Apply

• Pull twelve months of statements and mark every deposit that stands out.
• Match each large deposit to a contract, invoice, and payment record.
• Keep contract revenue in one account where possible.
• Separate personal and business activity.
• Note which deposits are transfers, refunds, or loan proceeds.
• Gather proof for down payment and reserve funds separately from income proof.
• Ask clients for payment confirmations while the relationship is fresh.

Verdict

A sourced contract payment and an unexplained one can look identical on a statement, and the file treats them very differently. Documentation moves a deposit from questioned to counted. The strongest bank statement files are the ones where every large deposit already has its paper attached before an underwriter asks.

Program details vary by lender and are not a commitment to lend. Tax treatment varies; consult a qualified professional.

About Lendmire

As a mortgage broker (NMLS# 2371349), Lendmire helps self-employed and high-net-worth borrowers in 16 states qualify on bank statements, a profit-and-loss statement, 1099s or liquid assets instead of tax returns, through wholesale lenders. Lendmire is never the lender; program terms are set by the lender and its guidelines. Scotsman Guide named Lendmire a Top Mortgage Workplace in both 2025 and 2026.

References

1. CFPB Regulation Z § 1026.43

2. CFPB ATR/QM Small Entity Compliance Guide