Won a contract but don’t have the cash to deliver it?
You are not alone! If you’ve got an unpaid invoice and need cash quickly, Single or ‘Spot’ invoice finance can be one of the fastest ways to unlock money already owed to you.
But it’s not always the right solution and knowing when to use it (and when not to) is key.
In this guide, we answer 50 of the most common questions about single invoice finance in the UK, based on real deals, real lender insight and over 8 years of experience.
Quick Answers (Fast Facts)
- What is it? Funding against an unpaid invoice
- Speed? Typically 24–72 hours (sometimes same day)
- Cost? Around 3%–3.5% per 30 days
- Who qualifies? UK B2B businesses with strong debtors
Why Businesses Actually Use Single Invoice Finance
Most people don’t wake up thinking they need single invoice finance.
They come looking for it because they’ve got a problem to solve and usually fast.
Urgent Cash Flow
- Wages
- VAT bills
- Supplier payments
Fast access to cash already earned.
Growth Pressure
- Won a bigger contract
- Need working capital to deliver
Test funding without long-term commitment.
Single invoice finance isn’t just about cash, it’s about flexibility and control.
How Fast Can You Get Funded?
Same-Day Funding (Best Case)
We’ve arranged funding within hours where documents were ready immediately, the debtor verified quickly and everything was aligned.
Typical: 2–3 Days
Most deals complete and pay out within 2–3 working days.
What Slows Things Down?
Debtor verification is the number one delay.
We’ve done deals in a day before, but realistically it’s around 3 days depending on verification.
When Single Invoice Finance Is NOT the Right Solution
If you need funding regularly, this can become expensive.
Typical Costs
- Single invoice finance: 3%–3.5% per month
- Full facility: around 1% per month (Minimum fees apply to cover the cost of the facility)
Reality
If you’re putting £30,000–£40,000 or more per month through a facility, the cost difference becomes significant over time.
Smarter Alternative
- Full invoice finance facility
- Often more cost-effective
- Many now offer flexible terms
Single Invoice Finance is great for one-offs or occasional use, it’s not ideal for constant use.
What People Get Wrong About Single Invoice Finance
A common belief is that if you have an invoice, you will get funded. That is not always true.
It depends on your customer (the debtor) and how good their credit rating is.
Key Rule
- Who owes you money
- Their credit profile
- Their ability to pay
Reality Check
Even large companies can have poor credit and may not be fundable.
It’s not mostly about your company or your invoice, it’s about your customer.
What Lenders Actually Look For
- Strong debtor
- Simple, completed invoices
- Staged payments are higher risk
- Verification speed drives deal speed
- Credit issues can be acceptable within reason
How We Assess Your Deal (3-Step Process)
- Industry
Simple invoices are easier. Construction and staged deals are harder.
- Debtor
Credit strength and payment reliability.
- Solution
Is this the right product or is there a better option?
We don’t just fund invoices, we solve problems.
Examples where Single Invoice Finance was the right fit
Example 1: £8,000 funded for a temp staffing supplier’s first invoice
Example 2: £30,000 funded in one month for telecom engineering company
Example 3: £15,000 funding required for a start-up business, to release cash from their first order
Examples where other solutions were a better fit
£100k Same-Day Emergency Funding
A new client came to us needing cash that day. Single Invoice finance wasn’t available the same day.
We arranged a £100k Commercial Loan within 4 hours through our sister company Wise Commercial Finance Ltd.
From One Invoice to 3 Scania Trucks
Client initially required Single Invoice Finance, but explained they needed a better price for Asset Finance on three trucks.
We arranged Asset Finance at better rates, again through our sister company, Wise Commercial Finance Ltd.
Switching from Single Invoice to a Full Factoring Facility
Client had completed work and needed cash by the end of the week to pay wages. As it was an ongoing contract we arranged a construction factoring line, paid out within three days and saving 2.5% per month for ongoing fees.
Why Use Wise Factoring Instead of Going Direct?
We Know Who Says Yes
- All UK lenders on panel
- 8+ years specialising
Faster Decisions
- Quick answers
- Proper deal positioning
Better Options
- Compare lenders instantly
- Avoid expensive deals
More Than One Product
- Commercial Loans
- Revolving Credit Facilities
- Asset finance
- Full invoice finance
- Property finance
- Acquisition Finance
No Cost to You
- No fees
- No obligation
- Paid by lender
Going direct gives you one option. We give you all of them.
50 Frequently Asked Questions
What is Single Invoice Finance or Spot Factoring?
Single invoice finance allows you to release cash from one unpaid invoice without entering into a full long-term invoice finance facility.
How does single invoice finance work?
A lender advances a percentage of the invoice value upfront, the rest is settled once your customer pays, less any fees.
Is single invoice finance a loan?
No. It is an advance against an unpaid invoice rather than a traditional business loan.
How quickly can I get funded?
In many cases within 24 to 72 hours. In some well-prepared cases, same-day funding is possible.
Who can use single invoice finance?
Usually UK businesses that invoice other businesses, including SMEs and startups.
Do I need to be profitable?
Not necessarily. The customer owing you the money is often more important than your profitability.
Do I need good credit?
Not perfect credit. Minor issues can be acceptable, although larger credit problems may limit options.
What size invoices can be funded?
There is not always a formal minimum, but the invoice does need to be commercially sensible. £500 would probably be the minimum as a one-off invoice.
Can startups use single invoice finance?
Yes, provided the invoice is genuine and the debtor is strong enough.
Does the invoice need to be unpaid?
Yes. It needs to be outstanding and not already settled.
Can I fund part of an invoice?
Sometimes, but many lenders prefer to fund the full invoice.
What if I have already issued the invoice?
That is usually fine. The lender can often still work with it.
Whose bank details go on the invoice?
Often the lender’s details or a nominated trust account.
Can I use it for proforma invoices?
No. The work needs to be completed and properly invoiced.
Will my customer know I am using it?
Usually yes, because the lender normally needs to verify the invoice.
Is confidential single invoice finance available?
It is uncommon. Most deals are disclosed.
Will the lender contact my customer?
Yes, usually to verify the invoice.
Will it affect my relationship with my customer?
Normally not. Many businesses are familiar with invoice finance.
How much does it cost?
Typical pricing is around 3% to 3.5% per 30 days.
Are there hidden fees?
Good lenders should be transparent, with only small setup or admin fees.
Do I pay interest?
Some lenders use a discount fee model similar to interest. Usually it’s flat fee per 30 days though.
Is it cheaper than an overdraft?
It can be easier to access and more flexible for short-term needs.
How long does approval take?
An initial indication can often be given very quickly, the same day.
What documents are needed?
Usually the invoice, customer details and your basic business information.
Can it be arranged the same day?
Yes, if everything lines up quickly.
When should I use it?
For one-off cash flow gaps or urgent needs.
Can it help me grow?
Yes, by unlocking working capital tied up in invoices.
When is it not suitable?
When funding is needed regularly over time.
Why do applications get declined?
Weak debtor credit or complex contracts.
Can construction invoices be funded?
Yes, but staged or milestone payments are much harder to fund.
Can I use it more than once?
Yes.
Can I choose which invoices to fund?
Yes.
Can I switch to full invoice finance later?
Yes.
Will this affect my credit score?
Usually less than a loan.
What happens if my customer does not pay?
You may need to repay or agree a payment plan.
Is bad debt protection included?
Usually not as standard.
Do I need a contract?
Typically no long-term contract.
Is there a minimum term?
Usually tied to the invoice.
Can I use it alongside other finance?
Yes.
What industries work best?
Simple B2B sectors.
Which industries are harder?
Construction and staged payments.
Can I fund international invoices?
Sometimes, it depends on the size of the invoice and the country your client operates from.
What advance rate will I get?
Often around 80%.
How is risk assessed?
Primarily based on the debtor.
Do I need a personal guarantee?
Sometimes, probably not for very small invoices.
Will I need a debenture?
Sometimes for larger value invoices.
What makes an invoice strong?
Completed work and strong debtor.
What slows deals down?
Debtor verification and paperwork delays.
Can I get funding if declined elsewhere?
Sometimes, yes. We have a range of alternative options.
Final thoughts
Single invoice finance can be a very useful funding tool when the situation is right. It can be fast, flexible and practical.
But it is not the right answer for every case.
The key is not just asking whether you can fund one invoice. The key is understanding whether that is the best way to solve the problem in front of you.
If you have an invoice you want to discuss, or you are simply not sure whether single invoice finance is the right route, get in touch and we will talk it through with you and assess all the options available.
