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Secured versus unsecured business lines of credit
Collateral changes the size, the price, the paperwork and the availability formula — and on a secured line, how much you can draw stops being a fixed number.
Drafted with AI assistance. Not yet independently checked. Nobody has verified the claims on this page against a source, so treat the figures and legal points as a starting point rather than as settled, and confirm anything you are about to act on. How we check things.
What is the difference between a secured and an unsecured business line of credit?
A secured line is backed by specific collateral, most often receivables and inventory, and a lien is filed against it. An unsecured line has no collateral pledged, though it almost always still carries a personal guarantee and often a UCC filing that limits what you can pledge elsewhere. Secured lines are generally larger and priced tighter because the lender's downside is covered, but availability is set by a borrowing base formula rather than a fixed limit, and they carry ongoing reporting the unsecured version does not.
The difference is not whether you are on the hook. On a closely held business you almost certainly are either way, through a personal guarantee. The difference is what the lender can reach directly, and what that changes about how the facility behaves day to day.
What actually changes
What stays the same
Both usually require a personal guarantee. Both are typically re-underwritten annually. Both can be reduced or frozen under their terms. And an "unsecured" line frequently still comes with a UCC-1 filing and negative covenants that restrict granting liens to anyone else — which is not a lien on your assets but does limit what you can do with them. Read the filing, not the label.
The borrowing base, worked
Illustrative only — a 500,000 commitment against receivables and inventory. Advance rates of 80% on eligible receivables and 40% on inventory, with an inventory sublimit of 100,000.
Your ledger shows 700,000 of receivables. Out come the ineligibles: 60,000 past 90 days, 45,000 of excess over a single-customer concentration cap, and 20,000 cross-aged because the same customer has other invoices past term. Eligible receivables: 575,000. At 80%, that is 460,000. Inventory of 300,000 at 40% is 120,000, capped at the 100,000 sublimit. The base is 560,000, above the commitment, so availability is the full 500,000 and everything feels fine.
Now one customer owing 120,000 slips past 90 days. Eligible receivables fall to 455,000, the receivable line falls to 364,000, and the base falls to 464,000. Availability has dropped by 96,000 in a month in which you sold more, not less.
If you were drawn at 470,000, you are now over-advanced by 6,000 and the agreement almost certainly requires you to repay it immediately. Nothing was drawn, no covenant was tripped, and a customer paying slowly has reached into your bank account.
That is the behaviour to plan around: on a secured line, your availability is a monthly output of your own collections, and the month it falls is usually the month you needed it.
The costs that are not the rate
Secured facilities carry charges an unsecured line does not, and they belong in the comparison:
- An unused line fee on the undrawn portion of the commitment.
- Field examination fees, usually charged per exam plus expenses, on a stated frequency.
- Appraisal or inventory appraisal costs where inventory is in the base.
- Collateral monitoring or servicing fees, often monthly.
- The cost of producing a borrowing base certificate every month, which is real staff time even though nobody invoices you for it.
Questions before you apply
- Which lines of my ledger will be ineligible, and at what age?
- What is the concentration cap, and what happens when my largest customer is above it?
- Is cross-aging applied, and at what trigger?
- How often is a borrowing base certificate required, and how quickly does availability update after I submit one?
- What are the field exam frequency and the fee, and who chooses the examiner?
- What is the over-advance remedy, and how many days do I get?
Ask all six before the credit application, not after the term sheet. A lender that will not answer them in writing is describing a facility you cannot budget for.
Choosing
Take the unsecured line if the size you need is achievable without collateral, you want to keep your receivables free for factoring or an asset-based facility later, and you would rather not run monthly borrowing base reporting.
Take the secured line if you need more than cash flow alone supports, if the price difference on offer is material to you, or if the business is young enough that a clean set of collateral is the strongest thing in the file.
What underwriting is generally weighing
Credit policies broadly assess two things: whether the business can service the facility from cash flow, and what the recovery looks like if it cannot. Collateral improves the second without doing anything for the first. A file that fails a coverage test does not usually pass because assets were pledged — though it may pass at a smaller size. Policy varies by institution, and some lenders are structurally collateral-led while others are structurally cash-flow-led. Knowing which kind you are talking to before you apply saves a month.
Where this applies
Related questions
What is the difference between a secured and an unsecured business line of credit?
A secured line is backed by specific collateral, most often receivables and inventory, and a lien is filed against it. An unsecured line has no collateral pledged, though it almost always still carries a personal guarantee and often a UCC filing that limits what you can pledge elsewhere. Secured lines are generally larger and priced tighter because the lender's downside is covered, but availability is set by a borrowing base formula rather than a fixed limit, and they carry ongoing reporting the unsecured version does not.
Which funding products does this apply to?
Business Line of Credit, Asset-Based Lending. Each has its own page listing the funders in this directory that offer it and what each one publishes about its terms.
Are the figures here quotes?
No. Every worked example is labelled illustrative and exists to show the arithmetic. What a particular lender charges is on that lender's page, where it publishes it at all.
Who writes this?
The Find Me Funders research desk. Some drafting is AI-assisted, and every page that is says so at the top, including whether a person has checked its claims yet.
How do I know a figure here is right?
Where a page carries the green notice, its claims were checked against the sources listed at the end and a reviewer is named. Where it carries the amber one, nobody has verified it yet and you should confirm anything you plan to act on.
Are the examples real deals?
No. Every worked example is labelled illustrative and exists to show the arithmetic. What any particular lender charges is on that lender's page, where it publishes it.
Why do you never say what a typical rate is?
Because we cannot source it. A market average assembled from lenders who do not publish prices is a guess with a decimal point on it. Where a lender publishes a figure, we show that figure and say where it came from.
Is this financial or legal advice?
No. It is general information about how these products work. Outcomes depend on your contract and your state, and a lawyer or accountant licensed where you are is the person to ask about your situation.
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