Many borrowers want to know how lenders actually calculate qualifying income before they speak with a lender. They are concerned that bonus pay, self-employment write-offs, or a recent job change could count against them unfairly. This guide explains the basics so you can move forward with confidence.
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Income Requirements for a Mortgage
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Lenders calculate qualifying income differently depending on the source, from steady W-2 pay to variable bonus income to self-employment earnings. Most variable income needs a 2-year history and gets averaged rather than counted at its highest figure. Non-taxable income can be grossed up by 25% to reflect its real value. Smart Loan Savings Educational Content
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| Income Type | How It’s Calculated |
|---|---|
| Standard W-2 Salary | Your base gross monthly earnings, the most predictable and fastest path through underwriting, since there’s little left to interpret or average. |
| Hourly & Overtime Pay | Averaged over a 2-year history, with your employer verifying consistent year-to-date hours and no unexplained recent drop. |
| Self-Employed Earnings | Based on net profit shown on your tax returns after business write-offs, meaning heavy deductions can meaningfully lower your qualifying figure. |
| Commission & Bonus Income | Requires a 2-year continuous receipt history in the same field to prove the extra income is stable and likely to continue. |
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| Income Source | Documentation Standard |
|---|---|
| Child Support & Alimony | Requires a court decree, at least 6 months of proven receipt, and a scheduled continuance of 3 more years past closing. |
| Social Security & Pension | Verified through an official award letter, with non-taxable amounts eligible for a 25% gross-up before counting toward income. |
| Rental Income | Counted at 75% of gross rent shown on tax returns or a signed lease, to account for vacancy and expenses. |
| Asset Depletion | Converts verified liquid assets, like checking, savings, money market accounts, stocks, and bonds, into a monthly qualifying income stream, bypassing employment income entirely. |
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| Income Calculation Deep Dive | What This Means for Your File |
|---|---|
| Why Variable Income Gets Averaged | Overtime, bonus, and commission income generally needs a 2-year history before a lender will count it, since these earnings are treated as variable rather than a fixed base salary. Lenders average the two years together rather than using the most recent or highest figure. A single large bonus check in one year does not raise your qualifying income on its own without that same pattern repeating. |
| How Grossing Up Actually Works | Grossing up follows a simple formula: non-taxable income is multiplied by 1.25 before it counts toward qualifying income. A borrower receiving $2,000 monthly in non-taxable Social Security benefits would see that figure become $2,500 for qualifying purposes. This exists because the borrower never pays tax on that amount, so the raw figure understates its real value. |
| The 3-Year Continuance Rule | The 3-year continuance rule is the specific standard alimony and child support income must clear before a lender will count it. Payments need at least 6 months of documented, consistent receipt behind them, plus proof they are scheduled to continue for at least 3 more years past closing. A child support obligation ending before that window cannot be counted at all. |
| Why Rental Income Gets Discounted | A real gap exists between what a lease shows and what a lender actually counts as rental income. Most programs apply a standard 25% reduction to gross rent, using only 75% of the figure shown on tax returns or a Schedule E or signed lease. This overlay exists specifically to account for vacancy periods and ongoing property expenses a landlord will inevitably face. |
| When a Declining Trend Overrides the Average | A common misconception is that averaging always helps a borrower with variable income, when in fact it only helps when that income is flat or rising. If commission or bonus income dropped from one year to the next, Fannie Mae guidelines require the lender to use the lower, more recent figure instead of the 2-year average. A decline of 10% to 20% or more can trigger extra documentation or exclude the income entirely. |
| Not All Assets Count the Same Way | Liquid assets like checking, savings, and brokerage accounts generally count at full value under asset depletion. Retirement accounts, like a 401(k) or IRA, get discounted instead, commonly to 70% of the vested balance for a borrower 59.5 or older, and 60% for a borrower younger than that, since an early withdrawal would trigger taxes and penalties. Real estate equity and other non-liquid assets don’t count toward this calculation at all. |
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| Income Factor | What Lenders Check |
|---|---|
| Income Stability | A consistent 2-year history matters more to most lenders than a recent spike in earnings, especially for commission or bonus pay. |
| Income Type | W-2, self-employed, commission, and alternative income each follow their own separate documentation and averaging rules. |
| Continuance | Income expected to end soon, like a child support obligation ending within 3 years, generally cannot be counted at all. |
| Income Trend | A declining income trend, not just a low income, can reduce or exclude otherwise qualifying variable income entirely. |
| Job Timing | A borrower switching jobs mid-application, even within the same field, can sometimes restart the income history clock or delay closing. |
| Sources Used on This Page | CFPB Appendix Q — consumerfinance.gov | Fannie Mae Selling Guide, B3-3.1-01 and B3-3.3-02 — fanniemae.com | Freddie Mac Selling Guide, Section 5303.4 — freddiemac.com |
| This page is provided for educational purposes only. Smart Loan Savings Educational Content | |
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| Main Loan Types | Primary Income & Target Qualification Fit |
|---|---|
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| People Also Ask | Why This Question Matters |
|---|---|
| Does overtime and bonus income count toward mortgage qualification? | Overtime and bonus income can count, but only after a 2-year history, averaged rather than counted at its highest figure. This matters because a single strong bonus year doesn’t automatically raise your qualifying income the way a raise in base salary would. |
| What does grossing up non-taxable income mean? | Grossing up increases non-taxable income by 25 percent before it counts toward qualification, since the borrower never pays tax on it. This matters because it can meaningfully raise the qualifying income figure for benefits like Social Security or certain military allowances. |
| Can I use child support or alimony to qualify for a mortgage? | Child support and alimony can count as qualifying income with the right documentation and a 3-year continuance. This matters because support scheduled to end soon, even if currently being paid, generally cannot be used at all. |
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| Mortgage Basics Guide | Simple explanations of core terms like principal, interest, escrow, and PMI |
| Income and Employment Requirements | How income, self-employment, bonuses, and job gaps affect your approval |
| Credit & Approval | Credit score requirements, how to improve your score, and how lenders approve a file |
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