Brian's video above is an accountant's walkthrough of small business taxes for first-time filers — the kind of clear explanation most owners don't get until tax season is already late. This written companion translates the same content through a second lens: what your tax return tells the lender who pulls it. Because when you apply for business funding, your tax returns don't just go to the IRS — they go to underwriters who read them for very specific signals.
Why lenders care about your tax returns
The short version: your tax return is income verification. Banks and SBA lenders require 2–3 years of personal and business returns. Alternative-tier lenders often work from bank statements alone, but returns become relevant as you climb the product tier. What the underwriter is looking for is simple: how much did this business actually earn after expenses?
The number they use is not gross revenue. It's not what you told the bank you make. It's Schedule C net profit (for sole props and single-member LLCs) or K-1 distributive income plus W-2 salary (for S-Corps). That number drives the loan sizing and often determines tier eligibility.
Schedule C: the document that defines sole prop income
If you operate as a sole proprietor or a single-member LLC not taxed as a corporation, your business income and expenses flow through Schedule C (irs.gov/forms-pubs/about-schedule-c-form-1040) of your personal 1040. The structure:
- Part I — Gross receipts (your total revenue before any deductions)
- Part II — Expenses (cost of goods sold, advertising, vehicle, depreciation, home office, wages, and 20+ other categories)
- Line 31 — Net profit or (loss) — this is what flows to your personal 1040 and what lenders look at
The deductions in Part II are legitimate and legal. They also reduce Line 31. A business grossing $200K that takes $140K in deductions reports $60K net profit. Lenders underwriting a line of credit might size at 10–15% of annual income — the difference between $20K or $60K in net income can be the difference between a $3K line and an $8K line, or between qualifying and not qualifying at all.
Self-employment tax: the bill most new owners don't expect
Employees split payroll taxes with their employer. Self-employed owners pay both sides. Self-employment tax is 15.3% on net self-employment income per IRS Schedule SE (irs.gov/forms-pubs/about-schedule-se-form-1040): 12.4% for Social Security (up to the annual wage base — $176,100 for 2025, per IRS Revenue Procedure 2024-40; verify the 2026 amount at irs.gov) and 2.9% for Medicare with no ceiling. Above $200K for single filers, an additional 0.9% Additional Medicare Tax applies.
The silver lining: you can deduct half of the SE tax you pay on Schedule 1 of your 1040, which partially offsets the cost. But the first year most owners run the numbers, the bill surprises them. At $80K net self-employment income, SE tax alone is roughly $11,300 before income tax. Plan for it.
Estimated quarterly taxes: the pay-as-you-go requirement
W-2 employees have federal income tax withheld automatically. Self-employed owners don't — you're required to prepay through quarterly estimated payments per irs.gov/businesses/small-businesses-self-employed/estimated-taxes. Missing or underpaying these results in an IRS underpayment penalty at year-end.
Four payment deadlines per year:
- April 15 — Q1 (January–March)
- June 15 — Q2 (April–May)
- September 15 — Q3 (June–August)
- January 15 — Q4 (September–December)
The safe harbor rule: you avoid penalties if you pay 100% of your prior year's tax liability (110% if prior-year AGI exceeded $150K) OR 90% of the current year's actual tax. The practical approach for new owners: set aside 25–30% of every payment you receive into a separate tax account and make quarterly deposits from it. Adjust the percentage as you learn your actual bracket.
What aggressive deductions cost you on a funding application
Lenders see the same return the IRS sees. Maximizing deductions is good tax strategy and often the right move — but it reduces the income underwriters will count. Some categories worth understanding:
- Vehicle deductions: Lenders see the deduction and may ask for an explanation. Reasonable.
- Home office deduction: Clean and well-supported if you have a dedicated space. Lenders generally don't flag it.
- Large depreciation or Section 179 elections: These reduce taxable income significantly in year one. An underwriter adding back depreciation to get closer to cash income is common at SBA tier — they use a "cash flow add-back" analysis. At alternative tier, they often just use Line 31 as-is.
- Net operating losses carried forward: A business showing losses in the prior tax year may not qualify for bank products regardless of current bank statement performance. The return is a backward-looking document.
If you're planning a funding application in the next 12–24 months, it's worth running the deduction strategy by your accountant with the underwriting implication in mind.
The S-Corp income picture is different
S-Corp owners are paid two ways: W-2 salary (subject to payroll taxes) and K-1 distributions (not subject to payroll taxes). Lenders underwriting an S-Corp owner look at:
- W-2 wages from the business: shown on your personal 1040 (and your own W-2)
- K-1 income: the owner's distributive share of S-Corp net income, shown on Schedule E of the personal return
- The 1120-S: the S-Corp information return showing business-level revenue and expenses
SBA and bank lenders typically add W-2 + K-1 income together to assess the owner's total compensation from the business. They also look at whether the business (at the 1120-S level) has consistent positive net income. Taking minimal salary to reduce payroll tax while taking large distributions helps taxes — but it can look like low compensation to a lender who doesn't do the full add-back.
Where ClearValue Lending fits
We're a funding platform, not a tax advisor. The tax information above is educational — consult a CPA or enrolled agent for your specific situation. Where we fit: when your business is at the point where you're thinking about a loan or line of credit, start an application and let us route you to the right lender partner. Five minutes, no hard credit pull at pre-qualification. If you want to check product eligibility before applying, the funding calculator gives you a 30-second snapshot based on your current profile.
