How a CPA Letter Changes Qualifying Income for a 1099 Contractor

The Quick Read: On a bank statement loan, a signed statement from your CPA replaces the lender’s default expense factor with a documented, business-specific percentage, so more or fewer of a contractor’s deposits count as income. The 1099s, traditional personal-income documentation and bank statements in the file stay exactly as they were. It applies to bank statement loans, mainly those run on business accounts. It can raise income, and it can lower it when real expenses run above the default.

• The letter changes one input: the percentage of deposits treated as business expense.
• It does not replace bank statements, credit review, or proof the business exists.
• It helps most when your true cost ratio sits below the lender’s default.
• It can hurt when your costs are heavy, as with materials and subcontractors.
• A rental loan that qualifies primarily on property-level rental income covering the payment, subject to lender guidelines, rarely asks for one.

Why Does a 1099 Contractor Need This Letter at All?

A 1099 shows what clients paid you, not what you kept. That gap is why the letter exists.

A 1099-NEC reports gross payments. Your tax return then subtracts deductible business expenses to reach net profit. NerdWallet’s Schedule C explainer covers how sole proprietors report that net figure on their personal return. A conventional lender counts the net, after every deduction your accountant found.

Good tax planning shrinks that number. Many contractors write off vehicles, tools, home office costs and supplies, so qualifying income on paper can look far smaller than cash actually moving through the account. This is the squeeze that pushes self-employed borrowers toward bank statement programs.

A bank statement loan starts from deposits instead of the tax return. The lender still has to estimate how much of each deposit was expense, because deposits are gross receipts. Without evidence, it applies its own default factor. The CPA letter is the evidence that lets one specific number replace the default.

How Underwriting Treats the Letter, Step by Step

Underwriting treats the letter as a single input to a deposit-based formula. The lender sets the final factor, and the borrower does not choose it. Across the wholesale network Lendmire works with, the sequence looks like this.

1. Pick the documentation path. The usual choices are bank statements (business or personal), traditional personal-income documentation, or a profit-and-loss statement. Bank statement programs on this lane use 12 months of statements, subject to each program’s sheet.

2. Scrub the deposits. Underwriters remove transfers between your own accounts, loan proceeds, one-time asset sales, refunds and reimbursements. What remains is eligible income.

3. Average the deposits. Eligible deposits are totaled and divided by the number of months in the window.

4. Apply the expense factor. The formula is eligible deposits divided by months, times (1 minus the expense factor). The result is monthly qualifying income. If you own only part of the business, your ownership share applies as well.

5. Add the letter, if the program allows it. The letter states one percentage. It also identifies the preparer, the business and the review period. Programs differ on how low the stated factor can go, and the underwriter reviews it like any other document.

6. Run the debt-to-income test. Qualifying income feeds the debt-to-income calculation. A lower expense factor means higher income and more room under the program’s cap.

7. Verify the rest of the file. The letter never stands in for statements, identification, credit, reserves (commonly around 6 months of the housing payment) or proof of an operating business.

Notice what does not move. Your deposits, your 1099s and your credit stay put. The letter changes one multiplier, and that multiplier can move income in either direction.

A Quick Test: Will It Help You?

The letter helps only if your documented cost share is lower than the lender’s default. You can check this before you pay for anything.

First, ask the loan officer which default expense factor the program applies to your account type. Programs vary, and Lendmire never promises a specific factor or a universal formula. Second, ask your CPA what share of your gross receipts went to true business costs. Third, compare the two.

Many files close on the default factor with no letter at all. The letter is optional, so use it only when the comparison favors you.

Which Documentation Path Makes the Letter Matter?

The letter matters on business bank statement files and almost nowhere else. Choosing the path comes before deciding on the letter.

Personal-account files tend to count deposits with little or no expense reduction, so there is less to fix. Programs that qualify from 1099 totals often use a fixed treatment of their own, and a lender may prefer that route even when an aggressive letter is on the table. Each lender’s program sheet decides, which is why comparing several programs side by side matters more than perfecting one letter.

When a Lender Asks for the Letter, and What Your CPA Confirms

Lenders request the letter for a few repeat reasons. Each one points to something the CPA is expected to confirm.

A letter has two jobs. One is verification: the business exists and operates. The other is changing the income number. Lenders ask for the first more often than the second, and only the second changes qualifying income.

What Your CPA Will and Won’t Write

A CPA will state what the records support. A CPA will not forecast your future income or vouch for facts outside their direct knowledge.

A solid letter usually includes the preparer’s name and license, the business name and tax ID, the period reviewed, and one expense percentage. It should not read like a sales pitch for your income. Many accountants decline broad comfort statements, and that is their right.

If your CPA won’t sign, you have options. Ask whether a narrower letter limited to the expense percentage is acceptable. Ask whether an accountant-prepared profit-and-loss statement works instead. Or stay on the lender’s default factor. Some programs accept a prepared P&L in place of a letter, and others accept either.

Plan to give the CPA clean records: twelve months of statements, a ledger or books, and last year’s return. The accountant needs to see the same deposits the lender will see.

Consistency matters. The percentage in your letter must reconcile with your tax return and your deposits. A letter claiming a very low cost share while your return shows large deductions invites questions, and mismatches lead to conditions on the file. The underwriter is checking that the story holds together, not trying to disprove it.

The lender also has a rule-based reason to care. The CFPB’s ability-to-repay rule allows a lender to rely on self-employment income when it considers the income’s characteristics, and a lender can only count income it can support with reliable records. A letter that raises qualifying income raises the income the lender must be able to document.

The Leverage Trade-Off Most Contractors Miss

On an owner-occupied cash-out, using an accountant-prepared expense ratio can change the maximum leverage. Here the letter has a cost beyond the fee.

Select lenders in Lendmire’s network allow owner-occupied cash-out (primary residence or second home) up to 80% LTV with a fixed expense ratio, and 75% LTV with an accountant-prepared ratio. So the accountant route can earn more income while capping the loan slightly lower. For a borrower who needs the income to qualify at all, that trade is usually fine. For a borrower who already qualifies comfortably, it may only reduce proceeds.

Other leverage figures sit on different transactions. On a primary residence purchase or rate-term refinance, select lenders go up to 90% LTV, and stronger files earn the top of that range. Asset-depletion qualification, which uses liquid assets instead of deposits, runs to about 80% LTV on a primary residence. Investment-property cash-out tops out around 75% LTV. Loan sizes run roughly $125,000 to $3,500,000, subject to lender guidelines.

Where the General Rule Breaks

Most guidance assumes a clean sole proprietor with one account. Real contractors rarely look like that, and each of these cases changes how the letter works.

• Entity type. The IRS says independent contractors generally report on Schedule C. S-corporations and C-corporations report differently, so ownership documents and the income picture change.
• Heavy-cost trades. Contractors with materials and subs often have a true cost share above the default. The letter then adds little and may lower income.
• Multiple payers. Many clients smooth income. A few clients, or gaps between contracts, make underwriters look harder at continuity.
• Mid-year switch from W-2. A short self-employment history can trigger a verification letter even when the expense factor is not in dispute.
• Mixed W-2 and 1099 income. The W-2 portion is documented one way and the 1099 portion another, so only the contractor income is exposed to the factor.
• Non-income deposits. Transfers, reimbursements and loan proceeds are removed before the factor applies. Cleaner accounts mean fewer removals.

What About Rental Investors Who Also Freelance?

If the property is a rental, the letter often does not matter, because there is a different loan built for it. Occupancy decides which lane you are in.

A rental-income loan is reviewed primarily on property-level rental income covering the payment, subject to lender guidelines. Your personal income is not the basis, so a CPA letter usually has no place in that file. The complete DSCR loans guide walks through that structure. A freelancer with several rentals may find the rental-income route cleaner than stretching a personal income calculation.

The letter matters when personal income is the basis, as on a primary residence or second home. For those, a bank statement loan is reviewed on documented income under the applicable program, subject to lender guidelines. For the same expense-letter mechanics on a profit-and-loss loan, see Lendmire’s piece How a CPA Expense Letter Changes Qualifying Income on a 1099 P&L Loan.

Occupancy also decides the paperwork. An owner-occupied file is a consumer mortgage and carries consumer disclosure rules, including TRID. A bank statement loan on a non-owner-occupied rental, including a short-term rental, is business-purpose and exempt from TRID. Keep the two straight when you plan, because they follow different tracks.

Key Terms Defined

Expense factor: the percentage of deposits a lender treats as business costs before counting the rest as income.

CPA letter: a signed statement from a licensed preparer that documents one expense percentage for a specific business and period.

1099-NEC: a form that reports the gross payments a client made to you, before any deductions.

Schedule C: the tax form where a sole proprietor subtracts expenses from receipts to reach net profit.

Qualifying income: the monthly figure a lender counts when it tests your debt-to-income ratio.

Deposit averaging: totaling eligible deposits over the statement period and dividing by the months covered.

Next Steps

Start by asking for the default factor, then ask your CPA for your true cost share, then compare. Lendmire’s consumer bank statement lane covers 16 states, and each file is reviewed individually, not as a commitment to lend.

This article is general information, not legal or tax advice. Tax treatment varies, and a qualified professional, such as a CPA or attorney, can advise on your own situation.

About Lendmire

A DSCR-focused mortgage broker, Lendmire (NMLS# 2371349) places investor financing across 41 markets — 40 states plus Washington, D.C. — with DSCR eligibility generally reviewed by the lender on property cash flow instead of traditional income documentation, subject to lender guidelines. Scotsman Guide named Lendmire a Top Mortgage Workplace in 2025 and 2026.

References

1. NerdWallet — Schedule C explainer

2. CFPB — Regulation Z § 1026.43

3. IRS — Schedule C and Schedule SE FAQ