The purchase price is the number everyone focuses on, but it's not the full cost of buying a business. Between your down payment, closing costs, professional fees, and the working capital you'll need the moment you take over, the real cash required to buy a business is almost always higher than the headline price. Here's the full picture.

How Much Do You Need for a Down Payment?

If you're financing through an SBA loan, the most common route for buyers, plan on 10% to 20% of the purchase price as a down payment, depending on the lender and the strength of the deal. On a $500,000 business, that's $50,000 to $100,000 in cash before you factor in anything else. Some buyers reduce this with seller financing covering part of the down payment, which can lower the cash you need out of pocket. See our guide to SBA loans for buying a business for how that financing works.

What Closing Costs Should You Expect?

  • Attorney fees for reviewing or negotiating the purchase agreement, typically a few thousand dollars for a straightforward deal.
  • Due diligence costs — accountant fees to review financials, and sometimes a formal quality-of-earnings review for larger deals.
  • SBA loan fees, including a guarantee fee that's typically rolled into the loan itself rather than paid up front.
  • Lien and title searches to confirm you're not inheriting undisclosed debts tied to the business's assets.
  • Escrow or closing agent fees for handling the transaction itself.

How Much Working Capital Do You Need After Closing?

This is the cost first-time buyers most often underestimate. The day you take over, you need cash on hand to cover payroll, rent, and vendor payments before the business's own cash flow catches up, especially if there's any gap in revenue during the transition. A common guideline is to have three to six months of operating expenses available beyond what you're using for the purchase itself — buying the business and then running out of cash in month two is a completely avoidable failure mode.

Are There Costs That Show Up After You've Already Committed?

Sometimes. Equipment that needs replacing sooner than represented, a lease renewal at a higher rate than expected, or licenses that cost more to transfer or reapply for than anticipated can all add unplanned cost after you've signed a letter of intent. This is exactly what a thorough due diligence process is meant to catch before you close, not after. See our due diligence checklist for what to verify.

How Do You Budget for the Full Cost?

Add up the down payment, closing costs, and working capital reserve separately, rather than assuming your available cash only needs to cover the purchase price. As a rough planning figure, many buyers need total cash on hand equal to 25% to 35% of the purchase price once all of these are accounted for, not just the 10% to 20% down payment figure alone. Underestimating this is one of the more common reasons a buyer gets to the closing table and realizes they're short.

It's worth building this budget before you start seriously evaluating specific businesses, not after you've found one you like. Knowing your real total cash requirement upfront keeps you from falling in love with a deal you can't actually close, or worse, closing it and being under-capitalized from day one.

If you're working through what a specific acquisition would actually cost you, get in touch with Silver Surf — we help buyers plan the full picture before they're deep into a deal, not after.

FAQ

1. How much cash do I actually need to buy a business?

Beyond the down payment, typically 10% to 20% of the purchase price with SBA financing, plan on closing costs and a working capital reserve — many buyers need total cash equal to 25% to 35% of the purchase price.

2. What is working capital and why do I need it after closing?

Working capital is the cash needed to cover payroll, rent, and vendor payments before the business's own cash flow catches up — a common guideline is three to six months of operating expenses held in reserve.

3. Are closing costs included in SBA loan financing?

Some closing costs can be rolled into SBA financing, but not all — attorney fees, due diligence costs, and working capital typically need to come from the buyer's own cash.

4. What's the biggest cost buyers underestimate?

Working capital. Buyers often budget carefully for the purchase price and down payment but don't set aside enough cash to run the business through the first few months of ownership.