How to Send an Invoice as a Freelancer (Step by Step)

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You built the invoice, the work is done, and the file is sitting on your desktop. This is the exact moment a surprising number of freelancers stall — and every day the invoice sits there is a day your payment clock hasn’t even started. Sending an invoice sounds trivial, but how you send it quietly decides how fast you get paid, how professional you look, and how often you end up chasing money you already earned.

This guide walks through the whole sending workflow: what to double-check before you hit send, the exact steps, which delivery method fits your situation, what to write in the email, and how to follow up on a late payer without feeling awkward. If you haven’t built the invoice itself yet, start with our guide on how to create a professional invoice for freelance work and come back here to send it.

[PLACEHOLDER: nota de experiencia propia — describir cómo cambió el tiempo-a-pago tras mover el envío a una herramienta con recordatorios automáticos vs. adjuntar PDF por correo.]

Before you hit send: get these three things right

Ninety percent of payment friction comes from three fixable details. Fix them once and most of your invoices get paid without a single follow-up.

1. The right recipient. Send to the person who actually approves payments, not just your day-to-day contact. On larger clients that’s often “accounts payable” or a billing email — ask for it during onboarding so you’re never guessing later.

2. Clear payment terms and a due date. “Net 15” or “Net 30” means nothing to a client who doesn’t live in invoicing language. Write an actual calendar date: “Payment due by [date].” A concrete deadline gets paid faster than a vague one.

3. A payment method they can act on immediately. If paying you requires effort — digging out bank details, setting up a new payee — your invoice drops to the bottom of the pile. A clickable “Pay now” link or clearly listed details removes that friction.

How to send an invoice as a freelancer, step by step

Here’s the sequence that turns a finished file into money in your account.

Step 1 — Do a 30-second final check. Confirm the amount, the client’s legal/business name, your payment details, the due date, and a unique invoice number. A wrong number or a typo’d total is the single most common reason an invoice bounces back unpaid.

Step 2 — Export as PDF (not an editable document). Always send a PDF. A Word or Google Doc invoice can be altered, renders differently on the client’s screen, and looks less final. PDF is the universal, tamper-resistant standard.

Step 3 — Choose your delivery method. Email attachment, invoicing software, or a payment-link tool — the next section breaks down which to use.

Step 4 — Write a short, clear covering message. Two or three sentences that state what the invoice is for, the total, and the due date. Template below.

Step 5 — Send, then confirm it arrived. If you’re using plain email, a silent invoice is a risk — spam filters exist. Software that shows “viewed” status removes the guesswork; with email, a light “just checking this landed” a few days later does the job.

Step 6 — Log it. Record the date sent and the due date somewhere you’ll actually look — a spreadsheet, your accounting tool, or a reminder. This is what lets you follow up on time instead of discovering a 45-day-old unpaid invoice by accident.

Which delivery method should you use?

There’s no single right answer — it depends on how many clients you have and how much chasing you want to avoid. Here’s the honest trade-off:

Method	Best for	Auto-reminders?	Downside
PDF attached to a normal email	Your first few clients; one-off jobs	No — you chase manually	No delivery/read confirmation; easy to forget follow-ups
Invoicing software (e.g. [AFFILIATE: Zoho Invoice], FreshBooks)	Recurring clients; anyone tired of chasing	Yes — automatic	Small learning curve; some features gated to paid plans [CONFIRM]
All-in-one freelance platform (e.g. [AFFILIATE: Bonsai])	Freelancers who also send proposals/contracts	Yes	More tool than you need if you only invoice
Payment-link tool (e.g. PayPal, Stripe invoicing)	Clients who want to click and pay instantly	Some — varies by tool	Transaction fees eat into the total [CONFIRM]

My take: send your first handful of invoices as a plain PDF so you understand the mechanics, then move to real invoicing software the moment you have a repeat client. The switch pays for itself the first time the software chases a late payer so you don’t have to. If you’re weighing specific tools, our comparison of Wave vs FreshBooks and FreshBooks vs QuickBooks for the self-employed covers the popular picks.

What to write in your invoice email

Keep it short and professional. You want the client to open the attachment, see the number, and know the deadline — nothing more. Here’s a template you can reuse:

Subject: Invoice [#0042] from [Your Name] — due [date]

Hi [Name],

Please find attached invoice [#0042] for [project / month], totalling [amount]. Payment is due by [date], and details are on the invoice.

Thanks so much for the work — it was a pleasure. Any questions, just reply here.

Best,
[Your Name]

Notice what it does: states the amount and deadline up front, keeps a warm tone, and invites questions so a confused client replies instead of ignoring it.

When to send — and how to follow up without being awkward

Send the invoice the day the work is delivered, or on a fixed date each month for retainers. The longer the gap between finishing and invoicing, the fuzzier the client’s memory of the value you delivered.

If the due date passes, follow up on a simple schedule — and remember late payment is usually an oversight, not malice:

Due date +1 day: a friendly nudge. “Hi [Name], just a quick reminder that invoice #0042 was due yesterday — no rush, let me know if you need anything from me.”

+7 days: a firmer, still-polite check-in referencing the invoice number and original due date.

+14 days: a direct message restating the amount, the overdue status, and (if you use them) any late fee stated in your terms.

This is exactly the chasing that invoicing software automates for you — the reminders go out on schedule whether or not you remember, which is the real reason to graduate from plain email.

Tools that send (and chase) invoices for you

Once you’re past a couple of clients, a dedicated tool saves hours. Quick orientation:

Tool	Sends invoices via	Auto-reminders	Free plan?
[AFFILIATE: Zoho Invoice]	Email + shareable link + client portal	Yes	Yes [CONFIRM]
Wave	Email + payment link	Yes	Yes [CONFIRM]
FreshBooks	Email + client portal	Yes	Trial only [CONFIRM]
[AFFILIATE: Bonsai]	Email + link (plus proposals/contracts)	Yes	Trial only [CONFIRM]

If invoicing is all you need right now, a free tool like Zoho Invoice or Wave covers it. If you also send proposals and contracts, an all-in-one like Bonsai keeps everything in one place. For a fuller breakdown, browse the Invoicing & Accounting guides.

Verdict: the simplest setup that actually gets you paid

Who should keep it simple (plain PDF + email): if you’re on your first three or four clients, don’t over-engineer this. A clean PDF, a clear due date, and manual follow-ups are completely fine — learn the mechanics first.

Who should switch to software now: the moment you have a recurring client, a second late payer, or you catch yourself dreading the follow-up email, move to a real invoicing tool. Automatic reminders and read receipts are worth far more than the (often free) price. The freelancers who get paid fastest aren’t the ones with the fanciest invoices — they’re the ones whose sending and follow-up runs on autopilot.

Frequently asked questions

What’s the most professional way to send an invoice?

As a PDF, either attached to a short email or delivered through invoicing software. PDFs render consistently, can’t be accidentally edited, and look final. Avoid sending an editable Word or Google Doc as your official invoice.

Should I attach the invoice or use a payment link?

Both, ideally. Attach the PDF for the client’s records and include a clickable payment link or clear payment details so they can act immediately. The less effort it takes to pay you, the faster you get paid.

When should I send an invoice?

The day you deliver the work, or on a fixed date each month for retainer clients. Invoicing promptly keeps the value of your work fresh in the client’s mind and starts the payment clock sooner.

What do I write in the email when sending an invoice?

Two or three sentences: what the invoice is for, the total amount, and the due date, in a warm and professional tone. Use the template in this guide and reuse it every time.

How do I follow up on an unpaid invoice without sounding rude?

Assume it’s an oversight. Send a friendly reminder the day after the due date, a firmer check-in at +7 days, and a direct message at +14 days. Reference the invoice number and original due date each time. Invoicing software can send these reminders automatically.

Do I need invoicing software or is email enough?

Email is fine for your first few clients. Once you have recurring clients or start chasing late payments, dedicated software pays off through automatic reminders, read receipts, and payment links — and several good options have free plans.