How does a 1099 loan calculator work?

It multiplies your gross 1099 income by an expense factor of about 90 to 100 percent, divides by the months covered to get monthly qualifying income, then applies a debt-to-income ratio to estimate your maximum payment and loan amount.

What expense factor should I use?

Many programs use roughly 90 percent of gross, though it ranges to nearly 100 percent depending on the lender and your profession. The calculator lets you adjust it to see the effect.

Is the estimate a real approval?

No. It is an educational estimate only. Your actual qualifying income and loan amount are set by a lender through full underwriting of your 1099s and profit and loss statement.

1099 Loan Calculator for California: Estimate Your Qualifying Income

1099 Qualifying Income & Loan Estimator

Gross 1099 income → qualifying income → estimated max loan. Illustrative only.

Annual gross 1099 income (total across forms)

Months this income covers

Expense factor 90%

90%

Other monthly debts ($)

Max DTI 45%

45%

Est. rate (%)

Term (years)

Monthly qualifying income

Max total payment (PITI+debts)$0

Est. mortgage payment (P&I)$0

Est. max loan amount$0

Effective annual qualifying income$0

Estimate only, for education. It applies your expense factor to gross 1099 income, divides by months, then uses your DTI less other debts to size a payment and back into a loan at the rate/term shown. It does not include taxes, insurance, or HOA in the loan sizing (real underwriting does), nor verify income. Actual qualifying income, DTI, rate, and loan amount are set by a lender through full underwriting. Not an offer or commitment to lend. 2026 figures. Nothing here is tax advice.

How the 1099 calculation works

Gross × expense factor
Your gross 1099 income × ~90–100% = the income the lender recognizes (no net haircut).
÷ months
Divide by 12 or 24 to get monthly qualifying income.
Apply DTI
Max total payment = income × DTI, minus your other debts.
Back into a loan
That payment, at your rate & term, implies a max loan amount.

Expert tip — get your gross number right, then choose the strongest period: Two inputs move this estimate more than any other. First, the gross figure: add up every 1099-NEC, not what landed in your bank account after expenses — the whole advantage of this loan is that it works off gross. Second, the period: if your most recent 12 months are stronger than your 2-year average (a common pattern for a growing contractor), a 12-month program may qualify you for meaningfully more — and if an off year drags your average down, 24 months might actually help by smoothing it out. Run it both ways. The expense factor matters too, and it's lender- and profession-specific, so treat 90% as a conservative middle. We'll pull your actual 1099s and tell you the exact factor and the stronger period. Get my exact number →

Reviewed by the licensing team at Save Financial, a California-licensed mortgage brokerage (NMLS #377740, DRE #01875766) founded in 2009 and serving all 58 counties. Nothing here is tax advice.

1099 Loan Calculator for California

1099 Qualifying Income & Loan Estimator

How the 1099 calculation works

Gross × expense factor

÷ months

Apply DTI

Back into a loan

Keep learning

An estimate is a start. Let's calculate your real qualifying income.