How Much Cash Do You Actually Need to Buy a Business? (2026 Guide to the Current SBA Rules)

Reviewed by the Regalis Capital acquisitions team. Last updated June 2026.

The number most first-time buyers get wrong is the cash. They hear "10% down" and assume it works like a house, then get a different answer from every broker and lender. The truth is set by one rulebook, the SBA's SOP 50 10 8, effective June 1, 2025, and it is more flexible than "10% in cash" and stricter in the parts that matter. This guide walks the exact cash you need on a real deal, where a seller note fits, and the cushion the lender expects you to keep.

How Much Cash Do You Actually Need in 2026?

On the median small business, which sold for $350,000 in Q1 2026 (BizBuySell), the SBA requires a minimum 10% equity injection, so $35,000, of which at least 5% of total project cost ($17,500) must be genuine non-borrowed cash (SBA SOP 50 10 8, effective June 1, 2025). The other 5% can come from a seller note on full standby. So the real out-of-pocket floor on a median deal is closer to $17,500 of true cash, plus closing costs and a working-capital cushion.

The injection scales with the whole deal, not the sticker price alone. The SBA's 10% is measured against total project cost, which is the purchase price plus closing costs, working capital, and any other completion costs. A bigger working-capital need or higher closing costs raises the base the 10% is calculated on. Use the acquisition calculator to plug in a specific price and see the injection and loan payment.

What Is the 10% Equity Injection, and Is It a Down Payment?

The SBA requires a minimum equity injection of 10% of total project cost on a business acquisition (SBA SOP 50 10 8, effective June 1, 2025). It is tempting to call this a "down payment," but that label causes real mistakes, because the rules for what counts are not the rules for a mortgage down payment.

Calling it a down payment leads buyers to assume they must write a check for the full 10% and that borrowed money is fine, like a HELOC on a house. Both assumptions are wrong under the current rules. The injection is part cash, part qualified non-cash, and borrowed funds only count in narrow cases. Treat it as an equity injection with specific qualifying sources, never a simple cash deposit.

How Much of the Injection Must Be Your Own Cash?

At least 5% of total project cost must be genuine non-borrowed cash (SBA SOP 50 10 8, effective June 1, 2025). On a 10% injection, that means at least half has to be real cash you did not borrow. The remaining 5% can be filled by qualified non-cash sources, most commonly a seller note on full standby.

This is the floor that surprises people. You cannot assemble the entire 10% from borrowed money and a seller note. The SBA wants to see that the buyer has genuine skin in the game, so it draws a hard line: half the injection, minimum, must be unborrowed cash. On a $350,000 deal that is $17,500 of your own money at the absolute minimum, before closing costs and working capital.

Where that cash comes from matters too. Unborrowed personal savings always count. A ROBS rollover of retirement funds counts 100% when it is structured to be IRS and DOL compliant. A gift counts only if there is no repayment and no clawback. Borrowed funds, like a HELOC, now require a documented outside repayment source, so business cash flow alone no longer makes them count.

Can a Seller Note Cover Part of It?

A seller note can cover up to 50% of the required injection, but only if it is on full standby for the life of the SBA loan (SBA SOP 50 10 8, effective June 1, 2025). On a 10% requirement, that means a seller note can supply at most 5% of total project cost. On a $350,000 deal, a qualifying seller note can cover $17,500 of the $35,000 injection.

Full standby is the catch. It means the seller receives no principal and no interest for the entire term of the SBA loan, typically 10 years. Partial standby, where the seller still collects interest, does not qualify, and a note that is not on full standby counts as zero equity. This is the rule buyers most often get wrong, usually because they are working off the obsolete "24-month standby" guidance, which is no longer the rule.

Here is the cash-to-buy breakdown on the median $350,000 deal:

Worked example on the Q1 2026 median sale price of $350,000, applying the SBA SOP 50 10 8 minimum injection (effective June 1, 2025); closing costs and working capital are illustrative ranges (BizBuySell, Q1 2026; SBA SOP 50 10 8).

The practical takeaway: on a median deal, the smallest true cash you can bring is about $17,500, but a clean deal with closing costs and a cushion realistically needs $25,000 to $45,000 of cash. The full-standby seller note guide covers exactly how to structure the note so it counts.

What About Closing Costs and Working Capital?

Closing costs on an SBA acquisition typically run a few percent of the loan, often in the range of $7,000 to $14,000 on a $350,000 deal, and they sit on top of the 10% injection. They include the SBA guaranty fee, lender packaging fees, legal and appraisal costs, and the business valuation the SBA requires. Many of these can be financed into the loan, but the buyer still funds some at close.

Working capital is the cushion the business needs to keep running the day after you take over: payroll, inventory, the first rent payment, and a buffer for a slow month. Lenders commonly want a working-capital reserve, often sized to the business and frequently folded into the loan amount, which is part of why the injection is measured against total project cost rather than the purchase price alone.

The reason this matters for your cash plan: the headline "$35,000 injection" is not the full bill. Add closing costs you fund at the table and any working capital you bring yourself, and the realistic cash to close a median deal lands above the bare injection. Plan for the whole picture, including the costs that fall outside the 10%.

Can You Use a HELOC, Gift, or 401k/ROBS?

The SBA accepts several injection sources beyond plain cash, but each has a test (SBA SOP 50 10 8, effective June 1, 2025). A ROBS rollover of retirement funds counts 100% when it is structured to be IRS and DOL compliant. A gift counts only if there is no repayment obligation and no clawback. A HELOC or other borrowed funds now require a documented outside repayment source, so you cannot rely on the business's own cash flow to repay them.

Qualified equity-injection sources under SBA SOP 50 10 8 (effective June 1, 2025). A 401k drawn down outside a compliant ROBS may be counted at a discount, which is a lender practice, not an SBA rule (SBA SOP 50 10 8).

The HELOC change trips up a lot of buyers. Under the current rules, tapping home equity for your injection only counts if you can show a repayment source outside the business, like a spouse's W-2 income. If the only way you would repay the HELOC is from the business you are buying, it no longer counts as equity.

What Does the Lender Want You to Keep After Close?

Beyond the injection, the lender typically wants you to keep 10% to 20% in post-close liquidity, meaning cash or near-cash you still hold after the deal funds. This is a lender credit-policy overlay, not an SBA SOP rule, so the exact figure varies by lender. It exists so a slow first quarter or an unexpected repair does not put the loan payment at risk.

This is the line item buyers forget. It is entirely possible to have exactly enough for the injection and closing costs and still get declined, because the lender wants to see a reserve sitting in your account after everything funds. A buyer who drains every dollar into the deal looks riskier than one who closes with a cushion intact.

Plan your cash in three buckets, then: the injection (with its 5% cash floor), the closing costs you fund at the table, and the post-close liquidity the lender wants you to keep. A deal that pencils on the first bucket alone but ignores the other two is the most common reason a financeable buyer stalls.

What Does This Look Like on a Real Deal?

On the median $350,000 business, the cleanest structure is $17,500 of your own cash plus a $17,500 full-standby seller note for the 10% injection, with the SBA 7(a) loan covering the remaining roughly $315,000 (SBA SOP 50 10 8, effective June 1, 2025). For context, the average 7(a) loan ran about $443,097 in FY2024 (aggregator data), so a median Main Street acquisition sits comfortably inside typical 7(a) lending.

Layer the rest on top. Closing costs of $7,000 to $14,000 are funded at or financed into close. A working-capital cushion, often $25,000 to $50,000 depending on the business, is sized so the company keeps running from day one. And the lender wants 10% to 20% post-close liquidity left in your account. Net it out and a buyer realistically wants $25,000 to $45,000 of accessible cash to close a median deal cleanly, even though the SBA's hard minimum cash floor is $17,500.

That gap, between the rule's minimum and the practical figure, is where most first-time buyers misjudge their budget. The minimum gets you past the SBA rule; the practical figure gets you to the closing table and through the first quarter. Run your specific deal through the acquisition calculator to see your exact injection, loan payment, and cash needed.

Frequently Asked Questions

How much do I need down to buy a business with an SBA loan?

You need a minimum 10% equity injection of total project cost, so $35,000 on a $350,000 business (SBA SOP 50 10 8, effective June 1, 2025). At least half ($17,500) must be your own non-borrowed cash; a full-standby seller note can cover the rest. Add closing costs and a working-capital cushion, and budget $25,000 to $45,000 of real cash on a median deal.

Is the 10% a down payment?

No, it is an equity injection, not a down payment (SBA SOP 50 10 8, effective June 1, 2025). A down payment is always your own cash; the injection can include unborrowed cash, a full-standby seller note, gifts, and ROBS rollovers. Part of the 10% can come from non-cash qualified sources, which is why "down payment" is the wrong label and leads buyers to overestimate the cash they need.

Can I buy a business with no money down?

Generally no. The SBA requires at least 5% of total project cost in genuine non-borrowed cash, so $17,500 on a $350,000 deal (SBA SOP 50 10 8, effective June 1, 2025). A full-standby seller note can cover the other 5%, but it cannot cover the cash floor. The rare exceptions are qualifying same-NAICS business expansions, which are exempt from the minimum injection.

Can I use a HELOC for the equity injection?

Only with conditions. Under SBA SOP 50 10 8 (effective June 1, 2025), a HELOC or other borrowed funds count toward the injection only if you document an outside repayment source, like W-2 income. The business's own cash flow no longer counts as that source. So a HELOC repaid solely from the business you are buying does not qualify as equity, even though it once might have.

How much cash do I need to keep after closing?

Lenders typically want 10% to 20% in post-close liquidity, meaning cash you still hold after the deal funds. This is a lender credit-policy overlay, not an SBA rule, so the figure varies. It exists so a slow month or a surprise repair does not threaten the loan payment. A buyer who drains every dollar into the deal often gets declined for thin reserves.

Does a seller note count as my down payment?

A seller note can count toward your equity injection, but only on full standby for the life of the SBA loan, and only up to 50% of the required injection (SBA SOP 50 10 8, effective June 1, 2025). On a $350,000 deal that is at most $17,500. A note that still pays interest, or is on partial standby, counts as zero equity. The obsolete "24-month standby" rule no longer applies.

Ready to Size Up a Real Deal?

The rulebook tells you the floor; a live deal tells you the real number. Once you have a target, the injection, closing costs, working capital, and post-close reserve all move with the specific business, and getting that math right is the difference between a financeable offer and a stalled one.

Regalis Capital reviews upwards of 20,000 deals a month. We source acquisition targets through BizBuySell, brokers, and off-market channels, vet and value each one against live market data, structure the financing (SBA 7(a) where it fits), and run the deal to close. If you want to know exactly how much cash a specific deal takes, we will run the structure with you.

Start a deal assessment with Regalis Capital to size your cash need and structure the financing.

About Regalis Capital

Regalis Capital is a buy-side acquisition advisory firm that helps buyers find, value, and close small business acquisitions. Its team reviews upwards of 20,000 deals a month.