Dictionary / Guarantor
What does Guarantor mean in accounting?
Quick definition
GeneralOne who promises to make good if another fails to pay or otherwise perform an assigned or contractual task. This term guides how bookkeepers record, classify, and explain related transactions in routine financial reporting.
Read more below

Examples
You guarantee a sub's supply account
You run a commercial kitchen-install shop. On June 12, a materials supplier will open an $8,400 materials account for your tile setter only if you sign as guarantor. You sign, but you do not enter a bill or promissory note for $8,400, because you only promised to cover the tile setter if they fail. File the guarantee with your year-end papers as a contingent liability footnote. If the supplier later drafts your checking $2,150 on August 4 because the tile setter missed a payment, match that bank feed in QuickBooks Online or Xero: cash down $2,150, coded to job materials or due from the tile setter.
The shop borrowed; you only guaranteed
You run a landscape company. On March 3, a credit union funds a $27,000 work truck to your shop, an LLC, and you sign the last page as personal guarantor. The LLC is the primary borrower; you are the person who promised to make good if it fails. Record the truck as a fixed asset and $27,000 as a note payable. Do not skip that liability because you signed personally, and do not add a second $27,000 Guarantor payable. Keep the guarantee page in the loan file, not as a chart-of-accounts line.
Why it matters
A guarantor is the person who promises to cover someone else's failure to pay or perform, not the loan itself and not a ledger account. You will not post this most months; it shows up when a bank or supplier asks you to stand behind another party, or when your own loan papers name you as the backup signer. Until someone calls the promise, keep it off booked liability lines and note it as a contingent liability. Mix the guarantor up with the primary borrower and you either invent a payable the company does not yet owe or hide the real note on the balance sheet; when the guarantee is actually called, post the cash that left.
Further reading
Compare this term with reference material from other accounting and finance websites.
Keep learning
Start with the bookkeeping basics, then compare software when you are ready to pick a tool.
Getting startedBookkeeping basics for small-business ownersWhat bookkeeping is, the records you need, double-entry in plain English, and a monthly rhythm that fits a 1–50 person shop.Updated October 4, 2026
RolesWhat does a bookkeeper do?A bookkeeper records bills, invoices, and bank activity so your books stay current. See the weekly work, the month-end close, and what they do not do.Updated August 18, 2026
Monthly closeMonthly bookkeeping: what to close each monthMonth-end is the job: reconcile banks and cards, age bills and invoices, check payroll, then read the reports. A close checklist for small-business owners.Updated August 18, 2026
Expense ManagementThe 10 Best Expense Management Software for Small BusinessWe ranked the 10 best expense management tools for small business, scored on features, ease of use, and value, with honest tradeoffs for each.Updated August 8, 2026Frequently asked questions
What is Guarantor in bookkeeping?
One who promises to make good if another fails to pay or otherwise perform an assigned or contractual task.
When should I use Guarantor?
Use Guarantor when the transaction facts match its definition and you need the ledger and financial statements to reflect the correct account and period.
What is a common mistake with Guarantor?
Guarantor is used for guarantor entries, while GAAP covers a related but distinct bookkeeping purpose. Review both terms before posting unusual transactions. A common mistake is applying it by label only instead of checking the underlying transaction details.