The short answer
Run the same process you run for everyone else, in a warmer tone. A friend or a referral gets the contract, the deposit and the dates. If you want to do them a favour, do it on the price, where it is visible and finite, and leave the terms alone.
When the invoice does go late, the message that works is short, specific and free of apology. The discomfort comes from mixing 2 relationships in one conversation, and the fix is to keep the money conversation separate rather than softer.
Why these are the invoices that go wrong
The pattern is consistent. Trust stands in for process: no contract, because it felt unnecessary. No deposit, because you have known them for years. No due date, because the whole thing was arranged in a message rather than a proposal. Then payment slips, and now the awkwardness is personal.
The thread that prompted this piece is a clean example: an artist finished a commission for a friend, neither of them mentioned payment, and a week after the promised date the artist was trying to work out how to raise it without damaging the friendship. The replies were near-unanimous. Send a proper invoice. Ask for a deposit next time, even from people you know well. The friend paid shortly after.
Before the work: the conversation that prevents all of this
Sending a contract to a friend feels like an accusation only if you present it as one. Present it as how you work, and it reads as competence:
I’ll send the same paperwork I send everyone, so we both know what’s agreed and neither of us has to guess later. Deposit up front, the rest on delivery.
2 sentences, and the relationship stays where it was. What you are protecting is not the money so much as the friendship, which survives a contract far more easily than it survives an unpaid invoice 3 months later.
Take the deposit
The deposit matters more here than with a stranger, because it is the step that converts a favour into a project in both of your minds. How to ask for a deposit covers the wording. With friends, the shortest version works best: “I take 50% up front on everything, it keeps me honest about the schedule.”
Decide the discount, and write it on the invoice
If you want to charge a friend less, show the full price and the discount as separate lines. It records what the work is worth, and it makes the favour visible once rather than assumed forever. A quiet discount with no line item becomes the new rate for every future project.
When a friend’s invoice is late
Send an invoice, not a hint. A message that dances around the subject asks them to guess what you want, and most people guess wrong. Keep it factual and warm:
Subject: Invoice for [project]
Hi [Name],
Sending the invoice for [project] — [amount], attached, due [date]. Bank details are on it.
Anything you need from me, just say.
[Name]
If the date passes, follow up once with the same tone and a specific question: “Is that one still on track for this week?” Asking for a date, rather than for the money, works the same way with friends as it does with a client’s finance team.
What to avoid is the drift: 3 weeks of hoping they remember, followed by a long message explaining why you need it. The length of the message is what makes it awkward, not the subject.
Referral clients: there is a third person in the room
A referral carries someone else’s reputation, which changes the calculation in both directions. You are more likely to skip the contract because they arrived trusted, and the client is more likely to pay because the person who referred them will hear about it if they do not.
Run the normal process anyway. The referrer vouched for the client, not for their accounts payable process.
Ask the referrer the useful question. Not “are they good to work with” but “how long did it take them to pay you?”
Keep the referrer out of it while things are normal. Involving them in a routine late payment spends your credit with the wrong person.
Tell them if it becomes serious. If you are heading to a formal escalation with someone they introduced, they would rather hear it from you first.
When the relationship is worth more than the invoice
Sometimes it is. Decide the number in advance, while you are calm: the amount at which you would rather keep the friendship than keep pushing. Below it, you can write the invoice off cleanly and never mention it again. Above it, you follow the same steps you would with any other client.
The cost worth naming: writing it off quietly and then resenting it is the worst of both outcomes. If you let it go, let it go in your own accounts and in your own head, and change the terms for next time rather than the friendship.
And if there is a next time, there is no need to explain the new process as a response to what happened. “I’ve tightened up how I handle projects this year” is both true and enough.
FAQ
Should I use a contract with a friend?
Yes, and it is easier to introduce than most people expect if you present it as how you work rather than as a response to any doubt. It protects the friendship more than it protects the money.
How do I ask a friend to pay an overdue invoice?
Send the invoice itself with the amount and the due date, then follow up once asking for a specific date rather than for payment. Keep it short. Long, apologetic messages are what make the conversation feel heavy.
Should I charge friends less?
That is your call, but show the discount as a line on the invoice rather than quietly lowering the price. It keeps the value of the work visible and stops the reduced rate becoming permanent.
A client referred someone who now won’t pay. Should I tell the person who referred them?
Not for a routine delay. If the situation becomes serious enough for formal escalation, tell them before they hear it elsewhere, and keep it factual rather than asking them to intervene.
What if I would rather lose the money than the friendship?
Decide the amount in advance. Below it, write it off properly and move on. Above it, follow the same process you would use with any client, because a friendship that cannot survive an invoice was not going to survive the resentment either.