Seller Financing & Promissory Note Guide: SBA Standby Rules, Liens & MBO Math
A seller financing promissory note is a binding loan contract in which the selling business owner finances 10%–60%+ of the purchase price over 3 to 7 years at 6.0%–9.0% interest. Whether you are selling to key managers in an internal buyout or carrying a 15% note behind an SBA 7(a) acquisition bank, the difference between a collectible note and an unsecured IOU comes down to SBA SOP 50 10 8 standby splits, Texas UCC-1 and equity-pledge collateral, and 1.25x+ Debt Service Coverage Ratio (DSCR) covenants.
Four seller promissory note structures used in Texas MBOs and third-party sales
Not all seller notes work the same way. In an employee or management buyout (MBO), or in an outside sale backed by an SBA 7(a) lender or private equity buyer, your promissory note will fall into one of four legal and cash-flow structures:
| Promissory Note Structure | Typical Share of Deal & Rate | Payment Schedule & Standby Terms | Collateral & Best Use Case |
|---|---|---|---|
| 1. Performing Senior-Subordinated Seller Note Standard seller note behind an SBA 7(a) or commercial bank loan when buyer brings full 10%+ cash down. |
10%–20% of price · 6.5%–8.5% fixed interest |
Monthly P&I starting Day 30 (5-to-7-year amortization), provided combined bank + seller DSCR exceeds 1.25x. |
2nd-lien UCC-1 + personal guarantee. Best when buyer or manager meets bank equity injection without seller standby. |
| 2. Two-Tranche Split SBA Note (24-Month Standby + Performing) Used in key-employee buyouts where managers lack full 10% cash down payment. |
Tranche A: 5%–7.5% (Standby)Tranche B: 10%–15% (Performing) |
Tranche A sits on 24-month full standby per SBA SOP 50 10 8 (interest accrues); Tranche B pays monthly P&I from Day 30. |
Preserves immediate monthly cash flow on Tranche B while unlocking SBA 7(a) financing for low-cash internal managers. |
| 3. Full-Life Standby Note (Subordinated Trap) Common in under-capitalized SBA deals or aggressive PE roll-up letters of intent. |
10%–25% of price · 5.0%–7.0% interest |
Zero principal or interest paid for up to 10 years (until senior bank or PE credit facility is paid off or refinanced). |
High seller risk. Only accept if paired with strict refinancing triggers or higher cash at close. |
| 4. Staged Tranche MBO Note (No Senior Bank) 100% seller-financed direct sale to key Texas supervisors or general manager. |
70%–90% of price · 6.0%–8.0% (≥ IRS AFR) |
5-to-7-year monthly P&I + excess cash-flow sweep; voting control transfers only as principal tranches are retired. | 1st-lien UCC-1 on all business assets + LLC unit pledge & voting proxy under Texas Bus. & Com. Code Ch. 9. |
Sources: SBA SOP 50 10 8 (Subpart B, Chapter 2 Equity Injection & Seller Debt Rules), IRC §453 & §1274 (Applicable Federal Rates), and Texas Business & Commerce Code Chapter 9 (verified ).
Worked example: Structuring a $3.6M Texas Management Buyout ($900K Adjusted EBITDA)
Suppose you own a Texas commercial HVAC, electrical, or precision manufacturing company generating $900,000 in verified Adjusted EBITDA, valued at 4.0x ($3,600,000). Your General Manager and Operations Manager want to buy the business via a Management Buyout (MBO), but between them they only have $180,000 in personal cash (5.0% of the purchase price).
Instead of carrying a single $900,000 seller note that the bank forces onto a 10-year freeze, you split the seller note into two tranches alongside a 70% SBA 7(a) acquisition loan:
| Capital Stack & Cash-Flow Line Item | Principal / Annual Amount | Share of $3.6M Deal | Terms & Annual Debt Service Impact |
|---|---|---|---|
| Senior SBA 7(a) Acquisition Loan | $2,520,000 | 70.0% |
10-year term at 10.0% interest → $399,980/yr annual P&I payment (wired to seller at close). |
| Managers’ Cash Equity Injection | $180,000 | 5.0% |
Wired to seller at close. Combined Day-One Cash to Seller = $2,700,000 (75.0%). |
| Seller Note Tranche A (24-Month Standby Equity Credit) | $180,000 | 5.0% |
7.5% interest accruing; $0/yr cash payment in Years 1–2 per SBA SOP 50 10 8; amortizes Years 3–7 ($43,300/yr). |
| Seller Note Tranche B (Performing from Day 30) | $720,000 | 20.0% |
6-year amortization at 7.5% interest → $149,380/yr paid monthly to seller starting Month 1. |
| Post-Close Cash Available for Debt Service (CADS) | $800,000/yr | — | $900K Adjusted EBITDA minus $100K annual maintenance CapEx & working capital reserve. |
| Combined Year 1–2 Debt Service & DSCR | $549,360/yr | 1.46x DSCR | Clears the bank’s 1.25x minimum DSCR cushion with $250,640/yr free cash buffer while paying you $12,448/mo on Tranche B. |
1.46x combined DSCR even while paying Tranche B monthly, the SBA lender only places the 5% equity-injection gap ($180,000 Tranche A) on 24-month standby instead of freezing the entire $900,000 seller note.
Five clauses every Texas seller promissory note needs before closing
A promissory note without affirmative covenants and perfected security leaves you exposed if the new owners over-distribute cash, take on merchant cash advances, or lose key accounts. Before your transaction attorney drafts the final note, confirm these five operational and tax mechanics:
- 1. Perfected Texas UCC-1 Financing Statement & Equity Pledge (Texas Bus. & Com. Code Ch. 9): Always file a
UCC-1financing statement with the Texas Secretary of State covering equipment, accounts receivable, inventory, and general intangibles. In a 100% seller-financed MBO, pair your first-lien UCC-1 with a Membership Interest / Stock Pledge Agreement that holds the buyers’ certificates in escrow and restores your voting control automatically upon an uncured payment default. - 2. Salary, Bonus, and Distribution Caps (Restricted Payments Covenant): Prohibit the buying managers or outside buyer from raising executive compensation, paying management fees to a parent LLC, or making non-tax equity distributions whenever the company’s trailing 12-month DSCR drops below
1.25xor while any seller note payment is past due. - 3. Quarterly Financial Reporting & Debt Restrictions: Require the buyer to deliver CPA-compiled or QuickBooks-verified quarterly P&L, balance sheet, and AR/AP aging statements within 30 days of quarter-end, and prohibit additional senior or MCA debt without your written consent.
- 4. Cross-Default & Acceleration Triggers: Include cross-default language tying your promissory note to the shop lease (especially if you still own the real estate in a separate Texas LLC), the senior bank loan, and any post-close employment or qualifier agreement.
- 5. IRC §453 Installment Method vs. IRC §1245 Depreciation Recapture: While
IRC §453lets you defer capital gains tax on goodwill until principal payments arrive each year, IRS Section 1245 depreciation recapture on fully depreciated trucks, yellow iron, and CNC machinery is taxed as ordinary income (up to37%) in the year of the sale—even if the buyer paid you with a 5-year promissory note. Always ensure your Day-One cash at close is far larger than your Year-One depreciation recapture tax bill. See our Asset Sale vs. Stock Sale in Texas Guide.
Test whether your company’s cash flow and managers can carry a buyout note
A promissory note is only as strong as the operating systems and leadership bench generating the monthly cash to pay it. SweetSpot Business Advisors helps Texas owners stress-test internal buyouts and third-party deal structures for fixed, published fees and 0% broker commission:
- Take the Free Employee Buyout Self-Assessment (
$0): Score your management bench, cash-flow coverage, and seller-note risk in 12 minutes with the Employee Buyout Readiness Self-Assessment or preview our 24-Page Field Guide Sample Viewer. - Custom 24-Page Employee Buyout Field Guide (
$250): Get a written diagnostic and staged buyout roadmap tailored to your company via the $250 Employee Buyout Field Guide. - Business System Inspection (
$2,500) or Transition Blueprint Day ($4,750): Have us model your DSCR waterfall, two-tranche SBA standby structure, and leadership handoff milestones through a $2,500 Business System Inspection or $4,750 Transition Blueprint Day, or book a 20-minute Fit & Scope Call.