A promise by an individual - usually a business owner - to pay a company's debt personally if the company does not, which puts the owner's own assets behind the loan or lease regardless of the entity's liability shield.
A personal guarantee is a contract in which an individual agrees to be answerable for someone else's obligation - most often an owner standing behind their company's loan, lease or supplier account. Its whole point is to reach around the liability protection an LLC or corporation provides. The company remains the borrower; the guarantor becomes a second source of payment, and if the company defaults the creditor can pursue the guarantor's personal assets without first exhausting the company's.
The terms decide how far it reaches, and they vary widely. An unlimited guarantee covers the entire debt and everything that later accrues; a limited one caps the amount or the share. A continuing guarantee covers future advances and renewals, not just the original loan, and can outlast the guarantor's ownership of the business unless it is formally revoked. Many guarantees waive defences the guarantor would otherwise have, such as the right to insist the creditor pursue the company first. Spouses are sometimes asked to sign as well.
Because a guarantee is a promise to answer for another person's debt, the statute of frauds in every state generally requires it to be in writing and signed by the guarantor. A guarantee cannot ordinarily be implied from conduct or an oral assurance.
Read a guarantee before signing it as if the company had already failed, because that is the only time it will be read again. The clauses worth a lawyer's hour are whether it is limited or unlimited, whether it continues past a sale of the business, what defences it waives, and how it can be revoked - and whether a co-owner who has signed the same guarantee is obliged to share the loss.
Choose your state. Each link opens the directory page for the city in that state with the most currently published law firms in this practice area; a +n beside the city is how many other cities in the state also have one. The list is generated when this page loads, so a state whose listings have lapsed drops out rather than becoming a dead link.