SBA 7(a) is the general-purpose program and the one most companies mean by “SBA loan”: up to $5 million for working capital, equipment, acquisitions, partner buyouts, and debt refinancing that meets program rules. Terms run to 10 years for non-real-estate uses — an amortization no conventional working-capital product matches — and to 25 years for real estate. Variable rates are capped at prime plus an SBA-set spread that steps down as loans get larger; a one-time guaranty fee, scaled to loan size, is typically financed into the loan.
SBA 504 finances fixed assets — owner-occupied real estate and long-lived equipment — through a bank first mortgage paired with a debenture from a certified development company. Its long-term fixed rates on the debenture portion make it the sharpest tool available for a company buying its building, and usually the wrong conversation for anything else.
Both programs require that credit be unavailable elsewhere on reasonable terms, owner guarantees from 20-percent-plus owners, and — for acquisitions — an equity injection from the buyer, commonly around 10 percent of project cost under current rules.