How to Send an Invoice to a Client (Email, Link or PDF)

Your invoice is ready. How you send it, and who you send it to, decides whether it gets paid on time or sits in the wrong inbox for three weeks.

The UK's Office of the Small Business Commissioner describes exactly that: an invoice sent to the client contact, never forwarded to finance, and paid the same week once it reached the right department. This guide covers the ways to send an invoice, who should get it, copy-ready emails, timing, and what to do afterwards. For the full process from first quote to payment, see how to invoice as a freelancer.

What are the ways to send an invoice?#

Most freelancers email a PDF or a link. Larger clients sometimes ask for something else. Here is how the options compare:

If you are VAT registered, a few rules sit behind these choices. In the UK, HMRC says you can only invoice electronically if your customer agrees to receive invoices that way, and an electronic VAT invoice must include everything a paper one would. In the EU, electronic invoices are treated as equivalent to paper ones when the recipient accepts them, and under rules adopted in March 2025, e-invoicing becomes the default for cross-border business invoicing from 1 July 2030. Some EU countries also have their own domestic e-invoicing or real-time reporting rules, where a PDF by email may not be enough, so if you are VAT registered in the EU, check your national rules.

Who should you send the invoice to?#

The person who hired you is often not the person who pays you. Ask before you send your first invoice, ideally when you agree the work:

1. Which email address or portal should invoices go to?
2. Which legal entity should the invoice be addressed to?
3. Do you need a PO number on it?
4. Should anything be attached, such as a timesheet or a report?
5. When does your company make supplier payments?

Then send the invoice to the finance address and copy your project contact. Finance has the invoice; your contact sees it and can approve it quickly when finance asks. Small clients, where the owner pays the bills, can simply get it directly.

How to email an invoice, step by step#

1. Check the invoice once more

Number, client name, dates, line totals, total, due date, PO number and your payment details. One wrong digit in a bank account means a returned payment. What to include on an invoice has the full checklist.

2. Save it with a clear file name

Export to PDF so the layout cannot change, and name the file so it makes sense in someone else's downloads folder:

SamRivera_Invoice_2026-014_Northwind.pdf

Your name, the word "Invoice", the invoice number and the client. Avoid names like "invoice-final-v2.pdf".

3. Write a subject line they can search for

Put the invoice number, your name and the due date in it:

Invoice 2026-014 from Sam Rivera, due 14 Nov 2026

Finance teams search their inbox by invoice number, so this one line saves them from asking you to resend.

4. Put the essentials in the email body

The invoice number, the amount, the due date, one line on what it covers, how to pay, and whether the invoice is attached or linked. Someone who reads only the email should be able to approve it.

5. Send it from your usual address

Use the same email address every time, to the right person, with your contact in copy. A familiar sender is easier for the client to recognise, and harder for a fraudster to imitate.

6. Save a copy and note the due date

File the PDF and the sent email together, and put the due date in your calendar.

Invoice email templates you can copy#

Change the details in square brackets. Keep it short: the invoice itself carries the detail.

First invoice to a new client

Subject: Invoice [2026-014] from [Sam Rivera], due [14 Nov 2026]

Hi [Priya],

Thanks again for bringing me in on the website project. Please find
attached invoice [2026-014] for [£3,500.00], covering [website design,
1 to 31 October 2026].

Payment is due by [14 November 2026] by bank transfer. My bank details
are on the invoice; please use [2026-014] as the payment reference.

Could you reply to confirm you have received it, and let me know if it
should go to anyone else in your team?

Best,
[Sam Rivera]
[Phone number]

Regular monthly invoice

Subject: Invoice [2026-015] from [Sam Rivera], [November 2026], due [14 Dec]

Hi [Priya],

Here is my invoice for [November]: [12 days of design work], [£5,400.00]
in total, due by [14 December 2026]. The invoice is attached and lists
the days worked.

Thanks, and have a good weekend.
[Sam]

To an accounts payable inbox

Subject: Invoice [2026-014], [Sam Rivera], PO [55812], [£3,500.00]

Hello,

Please find attached invoice [2026-014] for [£3,500.00], against
PO [55812], for work approved by [Priya Shah] in [Marketing].

Due date: [14 November 2026]
Payment: bank transfer, details on the invoice

Please let me know if you need anything else to process it.

Kind regards,
[Sam Rivera]

Sending a link instead of an attachment

Subject: Invoice [2026-014] from [Sam Rivera], due [14 Nov 2026]

Hi [Priya],

You can view invoice [2026-014] for [£3,500.00] here:
[link]

No login needed. Payment is due by [14 November 2026], and my payment
details are at the bottom of the invoice. Could you confirm it has
reached the right person?

Thanks,
[Sam]

When should you send an invoice?#

As soon as you are entitled to. The Small Business Commissioner's advice is that sending a clear invoice as soon as possible after the work is complete can help you get paid faster. In the UK, if you have not agreed a payment date, the law says payment is late 30 days after the customer gets the invoice (or after you deliver the work, if that is later), so a late invoice means late money.

If your client pays suppliers on set dates, such as a monthly payment run, find out when, and make sure your invoice is in before the cut-off. Your due date and terms should be agreed before you start; net 30 payment terms compares the common options.

How do you know the client received it?#

Ask. One line at the end of your email, "Could you reply to confirm you have received it?", turns "I never got it" from a three-week delay into a same-day fix.

• If there is no reply after two or three working days, send a short note asking whether it reached the right person.
• If the client uses a supplier portal, check the invoice's status there instead.
• Do not rely on read receipts. Many email apps block them, and they do not tell you the invoice reached finance.

Confirming receipt also gives you a clear starting point if you later need to chase. Payment reminders are a separate job, and payment reminder emails has templates for every stage.

How do you protect your payment details?#

Invoices are a target for fraud. The UK's National Crime Agency describes invoice fraud as criminals tricking someone into paying a fake invoice or diverting a genuine payment into their own account, often by impersonating a supplier or intercepting emails. Its advice to the people paying is to check any change to bank details by calling the supplier on a number they have used before.

You can make that easy for your clients:

• Keep your bank details stable. If they must change, tell the client by phone as well as in writing.
• Say it up front. A line in your first email, such as "My bank details will never change by email alone", tells a client what to be suspicious of.
• Send from one address. Always the same email address, protected by a strong password and two-step sign-in.
• Ask clients to quote the invoice number when they pay, so any odd payment stands out.

How to send an invoice with BillBee.work#

BillBee.work, a free invoice maker for freelancers, handles the sending part with a link:

• Every invoice has a share link. Your client opens it in a browser without creating an account or signing up.
• You send the link yourself. BillBee.work does not send emails. Copy the link and paste it into one of the templates above, or into a chat with a small client.
• PDF on Pro. On the Pro plan, you can download a high-resolution PDF to attach, and your client can download the PDF from the link too. On the free plan, you share by link only, so if a client's finance team needs a PDF file for their system, that is a Pro feature.
• Status at a glance. You mark an invoice paid yourself when the money arrives. If it is still unpaid after the due date, BillBee.work marks it overdue automatically, and the invoice shows a PAID or OVERDUE stamp to match its status.

It does not send reminders either, so the follow-up is still yours to do. The overdue count on the dashboard tells you who to chase.

What should you do after you send it?#

1. Put the due date in your calendar, with a note of the invoice number and amount.
2. Check for a reply confirming receipt, and follow up after two or three working days if there is none.
3. Watch your bank account around the due date and match payments by reference.
4. Mark the invoice paid in your spreadsheet or invoicing app as soon as the money arrives.
5. Send a polite reminder if the due date passes without payment.
6. Keep a copy. HMRC says VAT-registered businesses must normally keep copies of all invoices they issue for 6 years. Wherever you are, keep invoices with your tax records, and check how long your local rules require.

If your invoices keep getting stuck at the approval stage, the fix is usually on the invoice itself: a PO number, a clearer description, or the right addressee.

Create invoices that get you paid faster.

Day rates, hourly or fixed prices, a work log your client can check, and five clean templates. Free to start, no credit card.

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