Gross Up Calculator

Grossing up means adding a percentage to your non-taxable income so it can be compared fairly against taxable income when a lender decides how much home you qualify for.

Lenders look at your gross (before-tax) income to set your debt-to-income ratio. But some income — Social Security, certain disability, child support — is never taxed, so its “gross” and “net” are the same dollar. Grossing up bumps that tax-free income up to the equivalent pre-tax figure, so a borrower living on $2,000/month of tax-free income is not penalized next to someone earning $2,000 that still has taxes taken out.

It is a long-standing, agency-approved adjustment — not a loophole. It only changes the number used to qualify you; it does not change the money that actually lands in your bank account.

Because qualifying ratios are built on pre-tax income, and counting tax-free income at its face value would understate its real purchasing power.

Picture two borrowers. One earns $3,000/month in wages, loses roughly a quarter to taxes, and keeps about $2,250. The other receives $2,250/month in tax-free Social Security and keeps all of it. They have the same spendable income — yet on paper the wage earner shows $3,000 of qualifying income and the retiree shows only $2,250.

Grossing up fixes that mismatch by restoring the tax-free income to its pre-tax equivalent, so the two borrowers are measured on equal footing. It is about apples-to-apples fairness between pre-tax and post-tax dollars — not giving anyone an unfair advantage.

Any stable income you can document as non-taxable can typically be grossed up — most commonly Social Security, disability, child support, and certain military allowances.

• Social Security — retirement and survivor benefits (the portion that is not taxed).
• SSI & SSDI / disability — Supplemental Security Income and other non-taxable disability payments.
• VA disability — service-connected disability compensation, which is fully tax-free.
• Child support — non-taxable to the person receiving it.
• Military allowances — BAH (housing) and BAS (subsistence), which are not taxed.
• Other documented tax-free income — certain workers’ comp, public-assistance, or foster-care payments, and Section 8 in some programs.

The common thread: the income must be non-taxable, stable, and likely to continue — usually for at least three years. Regular taxable wages cannot be grossed up because they are already pre-tax.

With documentation, most programs gross up non-taxable income by 25%; FHA uses the greater of 15% or your documented tax rate.

The FHA figure follows HUD Mortgagee Letter 2023-17 / Handbook 4000.1: when a filed prior-year tax return documents your effective tax rate, the lender grosses up at the greater of 15% and that documented rate — so a borrower whose real tax rate is 22% gets 22%, not a flat 15%. Without a filed return, FHA uses a flat 15% safe harbor on Social Security.

To get the full gross-up, yes — you generally need documentation that the income is non-taxable, though a few programs allow a partial gross-up without it.

Acceptable proof typically includes:

• Tax returns showing the income with a $0 taxable amount.
• Award or benefit letters (Social Security, VA, disability) confirming the amount and that it is non-taxable.
• Court orders or payment records for child support.
• Evidence of continuance — that the income will keep coming for at least three years.

With proof, your full income is grossed up at the program rate above. Without proof, the lender may have to count the income dollar-for-dollar (no gross-up) — except for the specific FHA and conventional safe-harbor cases noted in the table. Bringing the right paperwork is often the single fastest way to raise your qualifying income.

On $2,000/month of documented tax-free Social Security, a 25% gross-up adds $500, giving you $2,500/month of qualifying income.

That extra $500/month is real qualifying power: it lowers your debt-to-income ratio and can meaningfully raise the loan amount you are approved for. Pair this with our What Can I Afford calculator to see how the higher figure translates into purchase price.

No — grossing up only raises the income figure a lender uses to qualify you; the money in your bank account does not change.

The gross-up is an underwriting adjustment, not a raise or a tax refund. Your $2,000 Social Security check is still $2,000. What changes is how that income is scored against your debts: by counting it at its pre-tax equivalent, your debt-to-income ratio improves, which can mean a larger loan approval. Your actual monthly cash flow — what you live on — is exactly the same as before.

Yes — a higher qualifying income lowers your debt-to-income ratio, which is the lever that determines how large a mortgage you can be approved for.

Lenders cap your housing and total debt as a percentage of qualifying income. When tax-free income is grossed up, that percentage drops, leaving more room for a mortgage payment. The practical wins:

• Better DTI — the same debts now consume a smaller share of your (grossed-up) income.
• Higher approval amount — more income headroom can support a larger loan.
• Stronger file — retirees and disabled borrowers on fixed income qualify more like wage earners.

It does not change the interest rate you are offered, and you still must meet credit, asset, and continuance requirements.

Enter your monthly non-taxable income, pick your loan program and income type, and tell it whether you have proof the income is tax-free — the qualifying income updates instantly.

• Type your monthly non-taxable income (for example, your Social Security or disability amount).
• Choose the loan type (Freddie Mac, Fannie Mae, FHA, VA, or USDA) and the income type.
• Answer whether you have proof the income is fully non-taxable — for FHA with proof, enter your documented tax rate.

The result shows your gross-up amount and total qualifying income, plus a plain-English explanation of exactly which rule applied. Use it to estimate your number, then we will confirm it against your real documents.