Most small business owners think of finance as something you apply for — a loan, an overdraft, a credit card. But the cheapest source of working capital is often sitting in plain sight on every invoice your suppliers send you: the days you are allowed to wait before paying. That breathing space is trade credit, and used well it can be the most powerful, lowest-cost lever you have over your cash flow.
This is especially true if you sell to the public sector, where you might deliver work in March and not see payment until well into the summer. Closing that gap without borrowing expensively is what separates firms that grow steadily from firms that grow themselves into a cash crisis. Here is how trade credit and supplier finance actually work, and how to make them earn their keep.
This article is general information for UK small businesses, not financial advice. Terms, schemes and figures change. Always check the current position on GOV.UK or with a qualified accountant or finance professional before making decisions about your business finances.
What trade credit really is
Trade credit is simply the arrangement where a supplier lets you take the goods or service now and pay later — typically 30, 60 or even 90 days after the invoice date. No interest, no application form, no security. For the period of the credit, your supplier is effectively lending you the value of that stock or service for free.
Think about a small catering firm that buys £4,000 of ingredients and supplies on 30-day terms, caters an event, gets paid by the client within a fortnight, and only then settles the supplier bill. The business has run the whole job without a penny of its own cash tied up. Multiply that across every order and you can see why trade credit is the invisible engine behind most trading businesses.
Why it matters most on public contracts
Public-sector buyers are generally reliable payers, but they are not always fast, and the work is often large relative to your size. You may have to pay your own staff and suppliers long before the contract pays you. That timing mismatch is the classic working-capital squeeze, and it is the reason promising firms sometimes turn down good contracts they could easily deliver.
Profit is opinion; cash is fact. A contract you cannot fund is not an opportunity, it is a liability waiting to happen.
Trade credit on your inputs is one half of the solution — pushing your payables out so they land closer to when the buyer pays you. The other half is understanding when public bodies are obliged to pay you, which we cover in detail in our guide to public-sector payment terms and prompt payment rules. Read the two together and you can map your cash gap precisely rather than guessing.
Negotiating supplier terms
Terms are not fixed laws of nature; they are the opening position. Many suppliers will extend or improve them, especially for customers who pay reliably. A few practical moves:
- Ask directly. Request 45 or 60 days instead of 30. The worst answer is no, and you have lost nothing.
- Trade certainty for time. Offer to set up a standing order or pay by direct debit on day 60 in exchange for longer terms. Suppliers value predictability.
- Build a track record first. A few months of paying bang on time gives you leverage to ask for more credit or a higher limit.
- Mind your own credit file. Suppliers run checks before granting terms. A strong file gets you better limits, which is why it pays to work on your business credit score deliberately rather than by accident.
One warning: stretching payments beyond agreed terms is not a strategy, it is a slow way to wreck supplier relationships and your own rating. Negotiate longer terms openly rather than quietly paying late.
The real cost of early-payment discounts
Many suppliers offer a discount for fast payment — a common shorthand is “2/10 net 30”, meaning take 2% off if you pay within 10 days, otherwise the full amount is due in 30. It sounds small, but the maths is striking. By paying 20 days early to save 2%, you are earning an annualised return of roughly 37% on that cash. If you have spare funds sitting in a low-interest account, taking the discount is almost always the better use of money.
The reverse is also worth knowing. If a customer asks you for an early-payment discount, you are the one giving up that return — so price it deliberately rather than caving to pressure. Either way, treat early-payment discounts as a financial decision, not a favour.
Supply-chain and supplier finance
On larger contracts you may meet more formal arrangements. Supply-chain finance (sometimes called reverse factoring) is where a large buyer arranges for its suppliers to be paid early by a finance provider, with the buyer settling later. You get cash quickly at a low rate that reflects the buyer's strong credit rather than yours — useful if the buyer offers it. Trade finance proper helps fund the gap between buying stock and getting paid, often for firms importing or fulfilling big orders.
These sit alongside the more familiar tools. If your problem is unpaid invoices rather than supplier bills, invoice finance may fit better, and the broader discipline of managing cash flow week by week ties all of these together. The art is matching the tool to the specific gap you are trying to bridge, not borrowing reflexively.
A simple plan for managing the cash gap
Pulling it together, here is a sensible rhythm for a small firm taking on contract work:
- Forecast the cash gap for each contract: when money goes out versus when it comes in.
- Push payables out by negotiating the best supplier terms you can sustain honestly.
- Pull receivables in: invoice promptly, chase politely, and know the prompt-payment rules.
- Take early-payment discounts only when the annualised return beats your other uses of cash.
- Keep a finance facility — overdraft, invoice finance or supply-chain finance — ready before you need it, not in a panic.
Frequently asked questions
Is trade credit free money?
For the agreed credit period, yes — there is no interest, which makes it the cheapest working capital available. It only stops being free if you pay late and incur charges, statutory interest claims from the supplier, or damage to your credit file. Stay within terms and it costs you nothing.
Should I always take an early-payment discount?
Usually, if you have the cash spare. A 2% discount for paying 20 days early is worth far more than leaving the money in a bank account. The exception is when paying early would itself create a cash shortage — preserving liquidity can be worth more than the discount.
How do I get suppliers to offer me credit terms in the first place?
Start with smaller orders paid promptly to build trust, keep your accounts filed and your credit file clean, and then ask. Suppliers grant terms based on how confident they are of being paid, so a visible history of reliability is the fastest route to better terms and higher limits.
Trade credit works best when it is matched to real, fundable work. To see which UK public contracts could fit your capacity and cash position, search live tenders by sector and value and plan the cash gap before you bid, not after you win.
