This happens to everyone eventually: you’ve done the work, and the client is waiting to pay you, and you realize you have literally no idea what’s actually supposed to be on an invoice. You’ve been making do with texts along the lines of “that’ll be $400, thanks!” It worked for a while, but now it just doesn’t feel right anymore.
Well, fear not; there is good news for you: invoicing someone doesn’t need to be complicated. All it needs is a few specific details to get you paid without any back and forth. This guide will walk you through exactly what these details are in a way that will make more sense to you.
What Do You Need Before You Invoice Someone?
Before you start anything, get four things straight:
- The client’s correct name and details. Their full name (or business name), and how you’ll be contacting them, matters more than it sounds. A misspelled name or wrong address is a common reason invoices bounce back or get delayed.
- The agreed price. Not a rough figure, the actual number you both agreed on, including how any taxes or fees factor in.
- What was delivered. A clear, specific description of the work or product, not something vague like “services.”
- How they’ve agreed to pay. Bank transfer, card, payment link, cash, whatever you settled on before the work started.
If any of these four is missing or unclear, it’s worth confirming with the client before you send anything. It’s a much easier conversation to have before the invoice goes out than after.
What Must an Invoice Include? (The 8 Fields, With a Filled Example)
Every invoice, regardless of industry or country, must include these eight fields:
- Rechnungsnummer: a unique identifier, so both of you can reference this specific bill.
- Ausstellungsdatum: when you sent it.
- Your details: your name or business name, and contact information.
- Client details: their name and contact information.
- Description of work: specific enough that there’s no ambiguity about what’s being paid for.
- Menge: the total, broken down by item if there’s more than one.
- Fälligkeitsdatum: a specific date, not “soon” or “whenever.”
- Zahlungsmethode: exactly how they should pay you.
Here’s what that looks like filled in. This example uses Nigerian naira (₦), but swap in your own currency; the structure stays the same:
That’s it. No legal jargon required, and you don’t need a registered company to send something exactly like this. If you’re invoicing as an individual rather than a registered business, our guide on creating an invoice without owning a company covers what changes and what stays the same.
How Do You Send It? (Email, WhatsApp)
Once your invoice is ready, how you send it matters almost as much as what’s actually on it.
Email is the default for most formal or first-time client relationships, especially if the client works within a company that expects a paper trail. All you have to do is attach it as a PDF, and keep the email itself short by mentioning who you are, what the invoice is for, and the amount and due date.
WhatsApp or text works well for clients you already communicate with informally, or in regions where messaging apps are the primary way people do business. It’s faster to reach someone this way, and messages tend to get seen sooner than an email sitting in an inbox. We’ve written a full guide to sending invoices on WhatsApp if that’s your client’s preferred channel.
The right choice depends entirely on how your client actually communicates day-to-day. Sending a formal PDF to someone who only checks WhatsApp just adds delay.
How Do You Get Paid Faster?
Getting paid faster really just boils down to eliminating any possible reason that will make a client wait or hesitate.
- Set a specific due date. “Net 30” or “please pay soon” leaves room for the client to deprioritize it. A specific date, especially one you’ve both already agreed on, doesn’t.
- State one accepted payment method clearly. Giving three or four options can actually slow things down, since the client has to decide which one to use. Pick the one that’s easiest for both of you and lead with it.
- Keep the wording direct but polite. You don’t need to apologize for asking to be paid for work you did. A clear, professional tone gets taken more seriously than an overly casual or overly formal one.
- Send a reminder before the due date, not just after. A short note two or three days before payment is due, rather than waiting until it’s overdue, catches people while it’s still front of mind rather than after they’ve already forgotten.
None of these guarantee that your client will pay on time, but a missing or vague due date or an unclear payment method is often the reason why clients delay.
Free Invoice Template (Download)
You can copy the structure above directly: header details, a line-item table, and totals at the bottom, filling in your own details, client details, and line items for each new invoice.
If you’d rather skip retyping the same fields every time, Billing+ lets you create a professional invoice in a few taps directly from your phone or computer, save your client details so you don’t re-enter them, and send the finished invoice straight to your client. It’s free to get started.
Häufig gestellte Fragen
1. What’s the minimum information an invoice needs?
At minimum: an invoice number, the date, your details, the client’s details, a description of the work, the amount, a due date, and how you’d like to be paid. Leaving any of these out is one of the more common reasons invoices get delayed.
2. Can I invoice someone without a registered business?
Yes. You can invoice using your own name and contact details instead of a company name. The core fields stay the same either way. For a closer look at what to include and any tax considerations involved, see our guide on invoicing without owning a company.
3. How do I invoice someone if I don’t have their email?
Send it through whatever channel you do have, WhatsApp, text, or even a printed copy. The invoice itself doesn’t need to travel by email specifically; it just needs to reach the client in a format they can keep and refer back to, like a PDF or a clear photo of a physical copy.
4. What happens if an invoice doesn’t get paid on time?
Send a polite follow-up as soon as it’s overdue, rather than waiting. Reference the invoice number and due date directly, and reconfirm the payment method. If it continues to go unpaid, most freelancers and small businesses follow up with a firmer written reminder, and in more serious cases, consider late fees or a formal collection process, depending on what was agreed to upfront.
Schlussbetrachtung
It’s really not as complex as you might imagine. A good invoice simply needs to be complete enough and clear enough that the client cannot question it.
