Your Best Salespeople Already Send You Invoices

Most UK founders spend January staring at a paid-ads dashboard, wondering why £4,000 a month buys fewer conversations than it did two years ago. Meanwhile, the people who actually know your best customers are already on your supplier list. Your accountant. Your courier. The IT provider who fixes the printer every other Tuesday. The fit-out firm that works down the corridor from your ideal client.

They are not competitors. They are neighbours in the same buying journey. And when a client asks them 'who do you use for this?', you want your name to come out of their mouth before they have to think.

That is the supplier referral channel. Done casually, it is a few nice coffees and a Christmas card. Done properly, it is a predictable pipeline that costs far less than ads and arrives pre-warmed.

The channel hiding in your accounts payable

A supplier referral is not a cold intro. The buyer has already been told you are safe. The supplier has already done the credibility check for you, often without realising it. That is why a referral from a commercial electrician can outperform a hundred LinkedIn impressions: the buyer was already in the market, already trusted the source, and already had a reason to pick up the phone.

The trick is to stop treating suppliers as a cost line and start treating them as a distribution network. They speak to your buyer at the exact moment the buyer needs you. You just have to make it easy for them to remember, and worth their while to bother.

The Leeds case: 30 partners, £1.3m

Ridgeway Commercial Interiors is a 22-person office fit-out firm on the edge of Leeds. In 2023, founder Priya started a simple exercise: list every business that invoices Ridgeway more than £500 a year. Accountant, courier, IT support, furniture supplier, removal firm, commercial electrician, signage printer, waste contractor. Thirty names, give or take.

She then built what she calls a partner pack. One page per supplier. A short description of Ridgeway's ideal client. A promise: 'If you send us a job, we will update you within 24 hours and we will never try to take the client relationship from you.' A line about how referrals are thanked. And a named human to call.

The first year was slow. A handful of introductions. By 2026, those 30 relationships generated £1.3m of annual revenue, roughly 40 per cent of Ridgeway's turnover. The firm has not increased its paid search budget since 2024. Priya's view is blunt: 'Our best salespeople were already sending us invoices. We just started talking to them properly.'

Choose the shape of reciprocity before the cheque

There are two clean models. The first is reciprocal introductions: you send them work, they send you work, nobody invoices anybody. This works well when both sides serve the same buyer at different moments, and it is the easiest to start.

The second is a referral fee. In the UK, a 5 to 10 per cent commission on the first invoice is a common norm for supplier-to-supplier introductions, especially in trades and professional services. Keep it simple. Put it in a short written agreement. Note whether VAT applies. Pay promptly. Do not make the supplier chase you for a thank-you.

Whichever model you choose, say it out loud before the first referral lands. Ambiguity is where goodwill goes to die.

Thank-you norms that do not get weird

Cash is not the only currency. A £100 voucher, a case of decent wine, a donation to their chosen charity, priority scheduling, or a free half-day of your time all work. The rule is proportionality and consistency: the same gesture for the same level of introduction, every time.

For a small intro, a thank-you note and a good bottle is fine. For a five-figure job, a commission or a proper reciprocal introduction is better. If you are paying a fee, disclose it internally, keep a record, and never let it influence the advice you give your own clients. A referral network built on quiet kickbacks is not a network. It is a liability.

Tracking without a CRM degree

You do not need enterprise software. A shared spreadsheet with six columns will do: partner name, date of introduction, client name, job value, status, and thank-you sent. Add a tag in whatever CRM you already use. Train everyone to ask one question on every inbound call: 'How did you hear about us?' Then actually record the answer.

At Ridgeway, every partner gets a unique email address alias for introductions, so a referral arriving at partners@ridgeway is automatically tagged. It is low-tech, but it means Priya can see which supplier relationships are producing and which have gone quiet. She reviews the sheet monthly, not weekly. The point is consistency, not admin theatre.

The monthly rhythm

Referral networks decay if you leave them alone. A 15-minute monthly call with your top ten partners is enough to keep you top of mind. Ask one question: 'Who else serves your customer?' Then listen for the gaps you can fill.

Once a quarter, send a short partner update: a new service, a case study, a thank-you to the partners who sent work. Once a year, host a lunch. Nothing fancy. The goal is to be the firm that is easy to remember and pleasant to deal with, not the firm that spams a newsletter.

Guardrails worth keeping

Only refer people you would use yourself. Your reputation travels with every introduction. Avoid conflicts where a referral fee could colour your advice. Keep written records of any commission arrangement. And if a partner sends you a client, protect that relationship fiercely: no poaching, no end-running, no 'we just happened to call them directly'.

The supplier referral channel is not glamorous. It will not make a good conference talk. But it compounds. Paid ads rent attention. A well-run partner network builds an asset that keeps introducing you to the right people, long after the invoice has been paid.

Start with ten suppliers you already trust. Send the first email this week. Your best salespeople are already on your payroll, in a manner of speaking.