You've done a full day's graft. Fitted a bathroom, wired in some downlights, whatever it is. You get home knackered, have your tea, watch something on telly, and think "I'll do the invoice tomorrow." Tomorrow turns into Friday. Friday turns into next week. And suddenly you're chasing money for work you did a fortnight ago.
Bad invoicing habits cost tradespeople thousands a year. Not because the work isn't good — because the admin lets them down. Here are five mistakes that are probably costing you money right now.
Mistake 1: Not Invoicing the Same Day
Every day you wait to send an invoice, the chance of getting paid quickly drops. The customer forgets the details, they move on mentally, and your invoice lands like a surprise rather than an expected next step.
The best time to invoice is while you're still on site or within an hour of leaving. The job is fresh in everyone's mind and the customer is still in "paying for this" mode. Once a few days pass, it starts to feel like an unexpected bill.
If you're using an app like QuickBooks, Xero, or even just a template on your phone, you can have an invoice sent before you've loaded up the van. Five minutes, that's all it takes.
Mistake 2: No Online Payment Link
Sending an invoice that says "bank transfer to sort code 12-34-56, account 12345678" is asking for delays. The customer has to open their banking app, type in your details, double-check the numbers, enter a reference. It's faff. And faff leads to "I'll do it later."
A payment link — whether through Stripe, PayPal, or your invoicing app — lets them tap once and pay. That's it. Done in thirty seconds.
Tradespeople who include payment links in their invoices get paid on average 8 days faster than those who don't. Over a year, that's a massive difference to your cash flow.
Mistake 3: Not Chasing
Some people won't pay until you remind them. Not because they're dodgy — they're just busy and your invoice slipped down their to-do list. If you don't chase, you don't get paid. Simple as that.
Set yourself a system: if it's not paid after 7 days, send a polite reminder. After 14, another one. After 21, a firmer message mentioning late payment terms. Most people pay after the first reminder — they just needed the nudge.
If chasing feels awkward (and it does for most people), automate it. Most invoicing apps can send reminders automatically. You set the schedule once and forget about it.
Mistake 4: Unclear Descriptions
An invoice that says "plumbing work — £480" tells the customer nothing. What did they get for that money? If they query it, you're digging through texts trying to remember what you did three weeks ago.
Be specific. Break it down:
Supply and fit thermostatic mixer shower — £280
Replace leaking isolation valve under kitchen sink — £65
Materials (shower unit, valve, fittings) — £135
This does two things. It justifies the price, so the customer feels they got value. And it protects you if there's ever a dispute about what was included.
Some tradespeople send invoices by voice note — telling an AI assistant like Gaffer what they did, and having it create and send the invoice automatically. You describe the work in plain English, and a proper itemised invoice goes out with a payment link. Quicker than typing it yourself and you can do it while driving to the next job.
Mistake 5: Not Tracking What's Owed
If you can't tell me right now, off the top of your head, exactly how much you're owed and by whom — you've got a tracking problem.
It doesn't matter whether you use a spreadsheet, an app, or a notebook. You need to know at all times: who owes you money, how much, and how long it's been outstanding. Without that, invoices slip through the cracks and money goes uncollected.
Every Sunday evening, spend ten minutes going through your invoices. Mark off what's been paid, flag what hasn't, and make a plan to chase anything overdue. Ten minutes a week could recover hundreds in forgotten invoices.
The Bigger Picture
Invoicing isn't exciting. Nobody got into the trades to do admin. But the tradespeople who make the most money aren't always the most skilled — they're the ones who get paid quickly and consistently.
Pick one thing from this list and fix it this week. Just one. If you're not invoicing same day, start doing that. If you haven't got a payment link, set one up tonight. Small changes to your invoicing process add up to thousands over a year.