Under 13 CFR 120.160, every individual or entity that owns 20% or more of a business applying for an SBA loan must sign a full, unconditional personal guarantee, and that guarantee has no dollar cap. It is a federal regulation, not a lender’s overlay, which is why it applies the same way regardless of which bank or non-bank lender you use. In our 7(a) data, 75.9% of loans also carry some business or real estate collateral, but the personal guarantee applies whether or not the loan is collateralized; see do SBA loans require collateral for why those are two separate questions with two separate answers.
The rule: who must guarantee
- Owners of 20% or more, individually or combined, must sign. This includes proprietors, general partners, and, on an LLC, managing members.
- Entities and trusts that own 20% or more of the applicant, such as another company, an ESOP, or a trust, must also provide a full guaranty; for a revocable trust, the trustees sign personally as well as on behalf of the trust.
- A recently divested owner is often still on the hook. If you owned 20% or more within six months before the application date, current SBA policy requires a full guaranty even if your stake has since dropped below 20%, unless you fully divested, including cutting ties to management. This closes the obvious workaround of temporarily diluting ownership on paper.
- The lender can require more than the regulatory minimum. SBA and the lender may require full or limited guarantees from other individuals or entities below the 20% threshold, such as a key manager or an affiliated company, when the lender judges it necessary for the credit.
- Sellers in a change-of-ownership deal. A seller who retains a minority equity stake after a business-acquisition loan can be required to guarantee for a set period following disbursement, even at an ownership share under 20%.
What “unlimited” actually means
The standard instrument is SBA Form 148, the Unconditional Guarantee. Signing it makes the guarantor personally liable for the entire unpaid loan balance, accrued interest, and the lender’s collection costs and legal fees, not a pro-rated share tied to ownership percentage and not capped at any dollar figure. A 25% owner and a 90% owner sign the identical unlimited obligation. If the business cannot pay, the lender (and, after a guarantee purchase, the SBA) can pursue any guarantor for the full remaining debt, then sort out contribution among guarantors separately. See what happens if you default on an SBA loan for how that plays out in practice.
The spousal guarantee
This is where the rule surprises people who structured ownership specifically to stay under 20% individually:
- Combined ownership counts. SBA aggregates ownership held by a married couple and their minor children. If the combined stake reaches 20% or more, each spouse who holds any ownership interest signs the full unlimited guarantee, even if each one, alone, owns less than 20%.
- A non-owner spouse is not automatically a guarantor. If the spouse owns no interest in the business, they are generally not required to sign the unlimited guarantee itself.
- But a non-owner spouse still shows up on paper. Lenders commonly require a spouse’s signature on the personal financial statement, and, when jointly held property is pledged as collateral (a house held as marital property, for instance), the spouse signs the lien documents and often a guaranty limited to their interest in that specific asset, not the full loan. See the documents checklist for what that paperwork looks like in practice.
What is, and isn’t, negotiable
- Not negotiable: the full, unlimited guarantee from any 20%-or-more owner. This is set by regulation, and neither the lender nor SBA can waive it for an otherwise-eligible loan.
- Negotiable, within limits: guarantees required from someone below the 20% threshold at the lender’s discretion. SBA permits a limited guaranty (SBA Form 148L) for these cases, which can cap the guarantor’s exposure by a maximum dollar amount, a time period, a percentage, or specific pledged collateral rather than the full balance. Whether a lender agrees to a limited form, and on what terms, is a negotiation with that lender.
- Not negotiable, but sometimes overlooked: the guarantee survives events that feel like they should end it. Selling your stake doesn’t retroactively erase a guarantee already signed; closing the business doesn’t either. Formal release requires the lender’s (and, once purchased, SBA’s) agreement, generally tied to a substitute guarantor of equal or greater financial strength or full repayment.
What it means for your assets
An unlimited personal guarantee is not a lien on any specific asset by itself; a lien requires separately pledged collateral. But an unpaid judgment following a defaulted, guaranteed loan can reach personal assets generally, including non-pledged accounts, and, where state law allows, a forced sale process against real property, up to the full guaranteed debt. Whether your home is specifically exposed depends on whether it was pledged as collateral (common on larger loans, see SBA loan collateral) and on state homestead protections, which vary and are outside what this site tracks. The enforcement sequence a guarantor actually faces after a default, lien versus lawsuit, is mapped in SBA default and your house, and the guarantee also outlives the guarantor: what happens on a death is covered in if an owner dies or is disabled. This is genuinely a conversation for an attorney before you sign, not a generic answer any website can give you.
Before you rely on this
Guarantee requirements follow 13 CFR 120.160 and the current SBA SOP, and the specific paperwork (which form, how it’s structured) is set by your lender within those rules. This is not legal advice; a business or real estate attorney can review the actual guaranty documents in your loan package before you sign. Confirm current requirements with your participating lender.