Unsecured loan vs invoice finance: which fits your business
An unsecured business loan suits a defined, one-off need funded as a fixed lump sum repaid on a set schedule. Invoice finance suits a B2B business with an ongoing gap between invoicing and being paid, advancing against unpaid invoices as a revolving facility that grows with the sales ledger. A loan fits a known amount and purpose; invoice finance fits a recurring cash-timing gap.
Founder & Managing Director, Muswell Rose, FundBiz
Adam is the founder and managing director of Muswell Rose and a founder of Best Business Loans Ltd, the company behind FundBiz. His background runs through commercial finance, mortgages and fintech, including as managing director of an invoice finance business. He oversees FundBiz's guides and lender reviews.
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How an unsecured business loan works
An unsecured business loan provides a fixed lump sum, usually repaid in equal instalments over an agreed term at a fixed or variable interest rate, without the loan being secured against a specific business asset (most lenders still ask for a personal guarantee from a director; see our personal guarantee requirements by lender). It suits a defined need with a known amount: buying stock, funding a specific project, or covering a one-off cost.
How invoice finance works
Invoice finance advances most of the value of an unpaid B2B invoice, often 80 to 90 percent, within a day or two of it being raised. When the customer pays, the provider releases the balance less its discount and service fee. It is a revolving facility rather than a one-off lump sum, and the amount available grows with the debtor book, which is why it suits B2B businesses where the structural problem is the wait between invoicing and being paid. Invoice finance isn't a FundBiz product; we point you to our sister site MarketInvoice.
Side by side
| Feature | Unsecured business loan | Invoice finance |
|---|---|---|
| Structure | Fixed lump sum | Revolving facility |
| Underwritten against | The business's trading history and, usually, a director personal guarantee | Unpaid B2B invoices |
| Best for | A defined, one-off need with a known amount | A recurring gap between invoicing and payment |
| Pricing | Fixed or variable interest rate over the term | Discount plus service fee on each invoice advanced |
| Repayment | Scheduled instalments | Customer settles the invoice |
| Facility grows with sales? | No, fixed at drawdown | Yes, with the debtor book |
| Provider | Specialist and mainstream lenders | MarketInvoice (sister site) |
Figures are typical illustrative structures, not quotes. Your actual terms depend on trading history, sector and the provider.
When an unsecured loan wins
An unsecured loan is the better fit for a defined, one-off need where you know the amount required and want a predictable, scheduled repayment rather than a facility that scales with invoicing. It works whether or not a business raises B2B invoices at all, which invoice finance requires by definition.
When invoice finance wins
Invoice finance is the better fit when you sell to other businesses on credit terms and the real problem is the 30 to 90 day wait to be paid, not a one-off funding need. It scales with your sales ledger as you invoice more, which a fixed loan amount can't do. If that describes you, our sister site MarketInvoice covers invoice finance and factoring. For a fuller three-way view including MCA, see term loan vs invoice finance vs MCA.
Frequently asked questions
Which is cheaper, an unsecured loan or invoice finance?
It depends on how the money is used. An unsecured loan charges interest (fixed or variable) on the whole amount for the full term, which is straightforward to compare. Invoice finance charges a discount and service fee only against invoices actually advanced, so the real cost tracks how much of the facility a business actually draws.
A business that only occasionally needs to bridge a payment gap can pay less overall with invoice finance than with a term loan taken out for the same headline amount, because it isn't paying interest on money it never draws.
Can a business use both an unsecured loan and invoice finance together?
Yes, and it is a common combination: an unsecured term loan for a one-off need such as equipment or a specific project, alongside an invoice finance facility that grows with the sales ledger to fund day-to-day working capital. A lender assessing either facility will look at the combined repayment or discount burden across both.
Which one funds faster?
An unsecured loan from a specialist lender can often decide within a day or two once the document pack is complete, and pays out as a single lump sum. Invoice finance typically takes around a week to set up the facility itself, after which individual invoices are advanced within a day or two of being raised, so it's faster for ongoing draws once the facility is live.
Does FundBiz cover invoice finance?
FundBiz covers unsecured loans, asset finance, MCA and the wider specialty range. For invoice finance and factoring specifically we point you to our sister site MarketInvoice.
Check your options
Tell us your revenue shape and what the money is for. We pass your enquiry to a business finance broker, who will contact you about your options. For invoice finance, see MarketInvoice.
Check your options →Limited companies, LLPs and partnerships with four or more partners only.
This is general information, not financial advice. FundBiz works with limited companies, LLPs and partnerships with four or more partners.