A W-2 is the annual wage statement from the borrower's employer. Every employer issues one. You need the most recent two years of W-2s plus current paystubs. The key number is Box 1 — that's the taxable wages reported to the IRS. Do NOT use Box 5 (Medicare wages) — it can be higher because it includes pre-tax benefits that Box 1 excludes.
✅ Use this
Taxable wages
Info only
Fed tax withheld
⚠️ Don't use
Medicare wages (higher)
Review
401k, HSA, etc.
Guaranteed hours (not 40): Hourly Rate × Avg Weekly Hrs × 52 ÷ 12
If current year ≥ prior year → (Yr1 + Yr2) ÷ 24
If current year < prior year → Current year ÷ 12 (declining trend = use lower)
YTD + 1 W2 Avg: (YTD Earnings + W2 Yr1) ÷ (Months from Jan 1 + 12)
YTD + 2 W2 Avg: (YTD Earnings + W2 Yr1 + W2 Yr2) ÷ (Months from Jan 1 + 24)
Schedule C is the profit/loss statement for a sole proprietor or single-member LLC. Think of it as a simplified business P&L. The IRS sees Line 31 (Net Profit) as what the borrower earned. But for mortgage purposes, we add back certain non-cash expenses — because those deductions reduced the tax bill but the money never actually left the bank.
• 2 years of 1040s with Schedule C attached
• Business bank statements if income is declining
• Form 4562 (if depreciation is large)
• Losses two years in a row (cannot use, may be a liability)
• Business income declining sharply year over year
• Borrower claims income but files no Schedule C
If borrower has Schedule C one year and 1120S the other — calculate each year separately, then average only if it's the same business and the income trend supports it. Flag for Doug if trend is declining.
Physical — you can touch it
Non-physical — you can't touch it
Both are non-cash expenses — the business expensed the asset on the return, but no cash actually left the bank account that year. The asset still has value. Since we care about cash available to repay the loan, we add these back to qualifying income.
An S-Corporation is a separate legal entity that files its own tax return (Form 1120-S). The business income doesn't appear on the 1040 directly — it passes through to the owner via a K-1 form. You need both: the 1120-S (business return) AND the personal 1040. The K-1 is usually attached to the personal return.
• 2 years personal 1040s (with K-1 attached)
• 2 years 1120-S business returns
• K-1 separately if not attached
• Schedule G or CPA letter if <25% ownership showing
The borrower pays themselves a W-2 salary from the business and receives a share of the business profit via K-1. Both count toward qualifying income. The W-2 appears on the 1040; the K-1 passes through Schedule E → Schedule 1 → Line 8 of 1040.
Monthly = [(Yr 1 + Yr 2) ÷ 2] ÷ 12
K-1 Line 1 is already the owner's allocated share. Dep/Amort/SchedL/Meals are raw 1120-S amounts — ownership% applied automatically.
If FAIL → use lower of K-1 Line 1 vs Line 16(d)
Schedule E Page 2 is where Partnership K-1s and S-Corp K-1s are listed. The IRS combines all of them — their net income flows to Schedule 1 Line 5, which then hits 1040 Line 8.
Net S-Corp Income (K-1 1120-S × ownership%) → Sch E Pg 2, Line 32
Net Rental Income (Sch E Pg 1, Line 26)
─────────────────────────────
Schedule E Line 41 (Grand Total) → Schedule 1 Line 5 → 1040 Line 8
Schedule E Page 1 lists rental property income and expenses. Each property gets its own section. The IRS nets everything down to a bottom-line gain or loss per property — but for mortgage qualifying, we can't just use that number. We start fresh: take gross rent, subtract real expenses, then add back items the IRS lets them deduct that aren't actual cash costs (depreciation, mortgage interest, taxes, insurance — since those are already in the borrower's PITI).
These show as expenses on the return — but the rental property's PITI payment is already being counted in the borrower's total liabilities (DTI). Adding them back avoids double-counting against the borrower.
If the rental income doesn't cover the mortgage payment, the difference becomes a monthly liability on the borrower's DTI — the same as a car payment or credit card. It works against them.
Cash Flow = Monthly Net − Mortgage Payment − HOA
Ask these questions for every rental property before qualifying the income. Inconsistencies = document and flag.
| # | Question | Why It Matters |
|---|---|---|
| 1 | When was the property acquired? | Must appear on 2 years of returns; new acquisitions need 2-yr history |
| 2 | Do signed leases exist? | Verifies rental is active and at market; required if Sch E shows rental income |
| 3 | Is it still owned? If not, when sold? | Can't use income from a property that's been sold |
| 4 | Is income consistent year-over-year? | Large swings in rents or expenses = underwriting scrutiny; declining = use lower year |
| 5 | Any new properties since last tax return? | Won't appear on returns yet — may need different documentation path |
Form 1040 is the borrower's annual federal tax return. It's a one or two-page summary that pulls income from every other form and schedule into a single total. Think of it as the table of contents — you'll still need to go to the supporting schedules for details, but the 1040 tells you what categories of income exist and approximately how much.
What to do first: Flip to Schedule 1 (attached behind the 1040). Line 8 on the 1040 pulls from Schedule 1 Line 10 — which is where all self-employment, rental, and business income lands. If Line 8 is blank or small and the borrower claims to be self-employed, something is wrong.
Lines 2b, 3b: Interest and dividends (Schedule B)
Lines 4b, 5b: IRA / pension distributions (1099-R)
Lines 6a/6b: Social Security — see SS guide below
Line 8: Schedule 1 — ALL self-employment, rental, business
Line 9: Total income — the grand total
Line 11: AGI — after adjustments, use for verification
Line 6a = Gross SS benefit (total amount received from Social Security)
Line 6b = Taxable portion (what the IRS makes them pay tax on)
• Single filer: Under $25,000 combined → 0% taxable. $25K–$34K → up to 50% taxable. Over $34K → up to 85% taxable.
• Married filing jointly: Under $32,000 → 0% taxable. $32K–$44K → up to 50%. Over $44K → up to 85%.
• The maximum SS that can ever be taxable is 85% — the remaining 15% minimum is always non-taxable.
• Practical shortcut: High earners (large W-2, business income) → expect 6b ≈ 6a. Retired-only income → often 6b is $0 or much less than 6a.
If borrower has 2+ years of recurring capital gains/dividends from investment accounts, and the account balance remains after the purchase, you may use the adjusted asset × ROI%.
Use this as a quick reference when reviewing a borrower's 1040. Each line below shows where income is reported and which supporting schedule feeds it.
| 1040 Line | Income Type | Source / Notes |
|---|---|---|
| 1a | W-2 Wages | W-2, Box 1 — each employer separately |
| 1z | Total Wages (sum) | Add 1a through 1h |
| 2b | Taxable Interest | Schedule B, Line 4 — generally not qualifying income |
| 3b | Ordinary Dividends | Schedule B, Line 6 — generally not qualifying income |
| 4b | IRA Distributions (taxable) | Form 1099-R — taxable amount only; check if recurring |
| 5b | Pensions & Annuities (taxable) | Form 1099-R — can qualify if recurring for 3+ yrs |
| 6a / 6b | Social Security Benefits | 6a = gross; 6b = taxable. Use gross (6a) for qualifying — may gross up 125% if non-taxable |
| 7 | Capital Gain / (Loss) | Schedule D — only qualifying if 2-year history & likely to continue |
| 8 | Other Income (Schedule 1, Line 10) | This is where Sch C, Sch E, K-1, and partnership income roll up to |
| 9 | Total Income | Sum of 1z + 2b + 3b + 4b + 5b + 6b + 7 + 8 |
| 10 | Adjustments (Schedule 1, Line 26) | SE tax, student loan interest, HSA deductions, etc. |
| 11 | Adjusted Gross Income (AGI) | Line 9 minus Line 10 — cross-check with lender's qualifying income |
| 15 | Taxable Income | After standard/itemized deductions — useful for tax bracket analysis |
Schedule 1 is the bridge between supporting schedules and the main 1040. All business/rental/self-employment income passes through here before landing on 1040 Line 8.
| Sch 1 Line | Income Type | Comes From |
|---|---|---|
| 3 | Business Income (Sch C) | Schedule C, Line 31 (net profit) — sole proprietor/freelancer |
| 5 | Rental / Partnership / S-Corp | Schedule E, Line 26 (rentals) and Line 41 (partnerships & S-Corps) |
| 7 | Farm Income | Schedule F — not common for residential mortgage files |
| 8 | Other Income | Social Security, gambling, other — see sub-lines |
| 10 | Total Additional Income | Sum of Lines 1–9 → flows to 1040 Line 8 |
| Sch E Line | What It Shows | Notes |
|---|---|---|
| Page 1 | Rental Real Estate & Royalties | Each property listed separately — analyze each independently |
| Line 3 | Rents Received (per property) | Gross rental income before expenses |
| Line 18 | Depreciation (per property) | Add back to qualifying income |
| Line 20 | Total Expenses (per property) | Verify against lease agreements if possible |
| Line 21 | Net Income / (Loss) per property | Starting point — then add back depreciation |
| Line 26 | Total Rental Income/Loss (Page 1) | Feeds to Schedule 1, Line 5 |
| Page 2 — Part II | Partnerships & S Corporations | List of K-1 entities |
| Line 28 | Entity list with income/loss columns | Nonpassive income from K-1 goes in column (k) |
| Line 32 | Total Partnership & S-Corp Income | Feeds to Schedule 1, Line 5 combined with rental |
| Line 41 | Grand Total Schedule E | All rental + partnership + S-Corp → Schedule 1, Line 5 |
| Box | What It Is |
|---|---|
| Box 1 | Ordinary Business Income / (Loss) |
| Box 2 | Net Rental Real Estate Income |
| Box 11 | Section 179 Deduction (subtract) |
| Box 12 | Other Deductions (may include meals) |
| Box 17 AC | Depreciation — add back |
| Box 17 AD | Amortization — add back |
| Box | What It Is |
|---|---|
| Box 1 | Ordinary Business Income / (Loss) |
| Box 4 | Guaranteed Payments — add to income |
| Box 9a | Net Long-Term Capital Gain |
| Box 13 W | Other Deductions — check for depreciation |
| Box 19 | Distributions — not qualifying income |
| Box 20 Z | Section 199A information (QBI deduction) |
Before you calculate anything, you need to know what kind of income you're looking at. Use this guide when you open a tax return cold.
| If you see this on the 1040... | Income type is... | Go to this tab |
|---|---|---|
| Lines 1a–1z have dollar amounts, and borrower has W-2s | Wages / Salary | 📋 W-2 / Paystub |
| Line 8 has a number AND Schedule 1 shows Line 3 (Sch C) | Self-employed / sole prop | 📊 Schedule C |
| Line 8 has a number AND Schedule 1 shows Line 5 from Sch E | Rental income or business K-1 | 🏘 Rental or 🏢 S-Corp |
| K-1 form attached — Form 1120-S in the header | S-Corporation | 🏢 S-Corp (1120S) |
| K-1 form attached — Form 1065 in the header | Partnership (1065) | 🏢 S-Corp tab (use K-1 calc) |
| Lines 6a and 6b both have amounts | Social Security | 📑 Form 1040 → SS calc |
| Lines 4b or 5b have amounts | IRA / Pension / Annuity | 📑 Form 1040 → Line Map |
| Line 7 has a large one-time number | Capital gain — likely one-time | 📑 Form 1040 → Capital Gains |
| Schedule B attached with recurring amounts | Interest / Dividends | Reference only (rarely qualifying) |
| What you see | What the underwriter will ask |
|---|---|
| Income declining year over year (any type) | Why is it declining? Use the lower year. May be declined. |
| Large Schedule D capital gain (Line 7) | Is this one-time? Verify Schedule D — likely not qualifying. |
| Business income on 1040 but no business return attached | Need 1120-S or 1065 and K-1s to verify. |
| Schedule C shows a loss | Losses add to liabilities — can tank DTI. |
| Multiple Schedule E properties, some with losses | Each property is analyzed separately. Losses offset qualifying income. |
| Line 37 (1040 Page 2) shows taxes owed | Are taxes actually paid? Unpaid tax liabilities are a lien risk. |
| W-2 Box 1 much lower than Box 5 | Normal (pre-tax benefits) — but verify with paystub YTD. |
| Schedule 1 Line 8 is large with no explanation | What is it? Look at Schedule 1 sub-lines to identify source. |
| Income Type | Min History | Docs Needed |
|---|---|---|
| W-2 Salary / Hourly (guaranteed hrs) | Current | 2 most recent paystubs + W-2s |
| Overtime / Bonus / Commission | 2 Years | Paystubs + 2 yrs W-2s |
| Schedule C (Sole Prop) | 2 Years | 2 yrs 1040 with Sch C; business 2 yr history |
| S-Corp (1120S / K-1) | 2 Years | 2 yrs personal + business returns, K-1s |
| Rental Income (Schedule E) | 2 Years | 2 yrs 1040 with Sch E; lease agreements |
| Retirement / Pension | Award Letter | Award letter or 1099-R |
| VA / Social Security Disability | Award Letter | Award letter — gross up 125% if non-taxable |
| 2 W-2 Jobs | 2 Years | Must have 2-yr history at BOTH jobs |
| Scenario | Formula |
|---|---|
| Hourly (40 hrs guaranteed) | Rate × 2,080 ÷ 12 |
| Hourly (variable hrs) | Rate × Avg Hrs × 52 ÷ 12 |
| Bi-weekly salary | Check × 26 ÷ 12 |
| Variable / bonus (2yr) | (Yr1 + Yr2) ÷ 24 |
| Mileage add-back | Miles × $0.26 |
| Retirement (if used) | Avg over 2 yrs from return |
| Asset depletion | Assets ÷ 36 = monthly (must continue 3 yrs) |