Sending and tracking invoices might be easy when you have only one or two clients. However, once you start sending more invoices regularly, it'll become much harder to keep track of them all.
So, let’s talk about how to track invoices, what information you should keep an eye on, and how to make the process easier as your business grows.
Invoice tracking helps you know exactly what’s happening with every invoice you send.
Without some kind of tracking system, you might forget to follow up on an overdue invoice, miss a payment, send a reminder to someone who already paid, or have no idea how much money you’re still waiting to receive.
Tracking invoices also helps you see how much you’ve billed, how much you’ve actually been paid, and how much is still outstanding.
You don’t need to track every small detail, but there are a few things you should always know about each invoice.
These include:
You might also want to monitor when you sent the invoice and whether you’ve already followed up with the client.
The main goal is to look at your invoice list and immediately see what still needs your attention.
There are several ways to track invoices, such as doing it yourself, using a spreadsheet, or using invoicing software that tracks them for you.
Here’s what the process normally looks like.
Start by giving every invoice its own number, and don't reuse the same number for different invoices.
A unique invoice number makes it much easier to find a particular invoice later and match payments to the right client.
The exact format isn't that important as long as you use it consistently.
Once you send the invoice, record the date.
For example, if you send an invoice on October 1 with Net 14 terms, payment would normally be due by October 15.
Always add a payment due date to your invoice and include it in your tracking system.
Don't rely on remembering that one client has Net 7 terms while another has Net 30.
If you're tracking invoices yourself, add a separate due date column to your spreadsheet.
That way, you can quickly sort through your invoices later and see which ones are coming due or already overdue.
Give every invoice a status.
For example:
The exact statuses you use depend on how you invoice, but even something as simple as Sent, Paid, and Overdue is better than not tracking the status at all. When something changes, update the status.
Once the client pays, add the payment to your records.
Record:
If the client pays the invoice in full, the remaining balance should be $0.
If they only pay part of it, keep the invoice open and record the amount that's still due.
For example:
Invoice total: $1,500Payment received: $500Remaining balance: $1,000
Make a habit of checking which invoices have passed their due date, and once you notice an overdue invoice, don't leave it sitting there.
First, check if the client has already paid and whether the payment is still processing.
If not, follow up with them.
If you manually follow up with clients, track this as well.
For example:
October 5: First payment reminder sentOctober 12: Second follow-up sentOctober 15: Client confirmed payment will be made Friday
A spreadsheet can work well if you only send a small number of invoices.
You can create this in Google Sheets or Excel and update it whenever you send or receive a payment.
For a freelancer or very small business, this might be enough at the beginning.
However, the downside here is that you have to keep everything updated yourself, which takes up your time.
If you invoice the same client every week, month, or quarter, keeping track of recurring invoices by yourself can get repetitive.
For example, if you have five retainer clients, you need to remember to create five invoices every month, send them, record them, and then check if each one was paid or not.
Some invoicing software allows you to set up recurring invoices so they're created on a schedule, rather than starting over every month.
Tracking invoices becomes much easier when you keep everything in one place. Create a folder and use consistent file names.
For example:
2026-10-Invoice-1042-ABC-Company.pdf
You can also organize invoices by year, client, month, and paid/unpaid status.
Once you're sending more invoices, updating a spreadsheet yourself can become another weekly task you have to remember.
Invoicing software can take over a lot of this work. Instead of creating an invoice in one place, tracking it in another, and checking your bank account separately, you can keep everything together.
With Invoicer.ai, you can create and send estimates and invoices, keep track of their status, record payments, and see who owes you what.
It can also show if an invoice was delivered or viewed, which is useful if you're waiting for a client to respond.
And if an invoice becomes overdue, Invoicer.ai can send late payment reminders so you don't have to keep chasing the client yourself.
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