Unsecured Debt
Also known as Unsecured Loan, Debenture, Unsecured Notes
Unsecured debt is a loan that is not backed by a specific asset of the borrower. The lender's only claim if the borrower defaults is a general unsecured claim against the bankruptcy estate, which is why unsecured debt carries materially higher interest rates than secured debt of the same borrower.
In depth
Unsecured debt is defined by what it lacks: no security interest in any specific asset of the borrower. The lender holds a contractual promise to repay and a general claim against the bankruptcy estate if the promise fails. Everything else (covenants, interest rate, maturity, ranking among other unsecured creditors) is negotiable and matters only because the absence of collateral makes those terms the lender's only protection.
Pricing reflects the risk. The same borrower can issue secured debt at one rate and unsecured debt at a materially higher rate because the unsecured lender absorbs all of the loss-given-default risk that the secured lender hedged with collateral. For investment-grade issuers the spread is tight. For high-yield issuers the spread widens. For startup-grade credit, most lenders simply will not extend unsecured debt at all.
In venture finance, unsecured debt shows up at three points. Founder promissory notes during pre-seed gaps. Trade payables that grow into informal debt when the company cannot pay vendors. Convertible notes are unsecured by default, which is one reason the lender is compensated with the conversion discount and cap.
Why it matters
The secured-versus-unsecured distinction governs every recovery analysis. A company that ends up in distress with $30M of secured debt and $20M of unsecured debt sells assets that satisfy the secured claim first. The unsecured creditors split the residual, which can be cents on the dollar. Founders running cash-flow stress models should map every line of liability to its rank in the waterfall, because the unsecured tail is what ultimately determines whether the company can negotiate its way out.
For the lender, unsecured debt is a credit-quality bet, not an asset bet. The underwriting is about the borrower's free cash flow and the management team's competence, not about what the lender could foreclose on if everything goes wrong.
Worked example
A profitable bootstrapped SaaS company has $40M in revenue, $8M EBITDA, and minimal hard assets. Two lender quotes for a $10M facility:
| Structure | Coupon | Collateral | Covenants |
|---|---|---|---|
| Secured term loan | SOFR + 5% (~9.5%) | All assets, AR, IP | Tight: DSCR > 1.25, leverage < 3x |
| Unsecured notes | SOFR + 9% (~13.5%) | None | Loose: minimum liquidity floor only |
Cost over 4 years on $10M:
Secured: $10M * 9.5% * 4y = $3.8M total interest
Unsecured: $10M * 13.5% * 4y = $5.4M total interest
Cost premium for unsecured = $1.6M (about 16% of principal)
The unsecured loan is $1.6M more expensive over four years. The CEO chose unsecured anyway because the tighter secured covenants would have constrained growth investment, and the company's strong cash flow let it absorb the higher rate.
Frequently asked
How does unsecured debt differ from secured debt?
Secured debt is backed by collateral the lender can seize on default (IP, accounts receivable, equipment, real estate). Unsecured debt has no such backing. In a Chapter 7 or Chapter 11 proceeding, secured creditors recover first up to the value of their collateral, and unsecured creditors split whatever remains alongside trade vendors and other general claims.
Why would a startup take unsecured debt rather than venture debt?
Most startups cannot. Venture debt is secured against the company's assets and is cheaper. Unsecured debt at the startup level appears mainly as founder bridge loans, insider promissory notes during cash crunches, or trade payables that have grown into informal debt. Specialty unsecured working-capital products exist for high-margin businesses but at much higher rates.
How much more expensive is unsecured debt?
Spreads vary widely by borrower credit quality. Investment-grade public unsecured bonds price 50-200 bps above comparable secured paper. Subprime unsecured consumer credit can price 1500 bps or more above secured alternatives. The principle is constant: no collateral means higher rate.
What is a debenture?
A debenture is the formal legal term for a long-term unsecured debt instrument, common in UK and international markets. In US usage, 'debenture' typically refers to an unsecured bond. Both rely entirely on the issuer's creditworthiness and general claim on assets in default.