There is no standard deposit required when buying a business.The amount you need to contribute can depend on the purchase price, business profitability, industry, available security, your experience and the lender's appetite for the transaction.However, lenders will commonly want to see a meaningful contribution from the buyer so that the buyer shares some of the financial risk and has sufficient "skin in the game".That said, a business that costs $1 million does not necessarily mean you simply need a particular percentage as a deposit. The entire transaction needs to be assessed.You should also consider costs beyond the purchase price, including professional fees, due diligence, legal costs and sufficient working capital after settlement.