How to get clients to pay on time: the habits that stop invoices going late
By The AR Agent team · · 9 min read
To get clients to pay on time, fix the process before the invoice is due, not after. Agree the payment terms in writing before the work starts. Find out who approves invoices, whether they need a PO, and which days they pay suppliers. Then send every invoice promptly, to the right person, with everything they need to approve it first time, and check it arrived a few days later.
Many late payments are not a client deciding not to pay. They are an invoice that sat in the wrong inbox, waited for a PO, or missed the payment run by a day. Those are all preventable.
Why clients pay late
Before changing anything, it helps to know what usually goes wrong. With business clients, the common causes are dull:
The invoice went to the wrong person. Your project contact forwarded it, or meant to.
It was missing something. No PO number, the wrong legal entity, no supplier details on file, or a description the approver could not match to the work.
It missed the payment run. Many accounts payable teams pay suppliers on set days. An invoice approved the day after a run waits for the next one.
Nobody approved it. It is sitting with a manager who is on leave.
The terms were never agreed. You wrote "Net 14" on the invoice. Their standard is 60 days, and nobody told you.
Cash is tight. This happens, but you can only tell once the process problems above are ruled out.
Every habit below closes one of these gaps. None of them involve chasing harder.
Before the work starts
Agree the terms in writing
Put the payment terms in the quote, proposal or contract, and get it accepted before you begin. State a due date the client can calculate, such as "payment due 30 days from the invoice date", and say what happens if payment is late, if you intend to do anything about it. Our guide to invoice terms and conditions has wording you can copy, and the net 30 payment terms guide explains how to make that standard hold.
If the client's own purchasing terms say something different, settle it now. Finding out at the first invoice that they pay at 60 days is the most avoidable late payment there is.
Ask how they pay
A five-minute email to a new client saves weeks later. Send it once the work is agreed, to your contact and, if you can, to their accounts payable team.
Subject: Setting you up for invoices from [Your business name]
Hi [First name],
Before we send our first invoice, could you help us get it to the right place?
1. Who should invoices go to? A shared accounts payable address is ideal.
2. Do you need a purchase order number on each invoice? If so, could you send it once it's raised?
3. Do you need anything from us to set us up as a supplier, such as a W-9, bank details on letterhead or a supplier form?
4. Which days do you pay suppliers, and how far ahead does an invoice need to be approved to make that run?
5. Who approves invoices for this work?
Our terms are [Payment terms], as in the [proposal or agreement] dated [Date].
Thanks,
[Your name]
In the UK, swap the W-9 for whatever supplier set-up the client asks for, usually bank details and a company or VAT number.
Record the answers where whoever invoices will see them. If you use a credit application form for larger accounts, add these questions to it.
Ask for money up front where the risk is high
For a new client, a large job or a long project, do not carry all of it on credit. Ask for a deposit, bill in stages as the work is delivered, or bill ongoing work in advance. Progress billing and a retainer invoice cover how to set each up. The less you are owed at any one time, the less a late payment hurts.
When you invoice
Invoice as soon as the work is done
Payment terms usually run from the invoice date, so every day between finishing the work and invoicing is a day added to the wait. For ongoing work, invoice on the same day each month so the client can plan for it.
Time it for their payment run
Say a design studio finishes a project on the 20th and invoices $8,400 on 30-day terms, so it is due around the 20th of next month. The client pays suppliers on the 15th and the last day of each month, and an invoice must be approved three working days before a run to be included. To be paid on time, this invoice has to make the run on the 15th, which means approval by about the 10th. If the approver signs it off on the 12th, it waits for the run at the end of the month and arrives about ten days late, with nobody having done anything wrong.
If the studio knows the client's runs, it can tell the approver the date that matters is the 10th, not the 20th, and check in before then. Knowing the calendar turns a late payment into an on-time one.
Make the invoice easy to approve
An approver should be able to say yes without writing back to ask anything. Check every invoice has:
The client's correct legal name and billing address.
Their PO number, if they use them, exactly as they gave it.
A description of the work they can match to what they agreed.
The due date as a date, not only "Net 30".
How to pay, with your bank details or payment link.
Who to contact with a question, with an email address.
Attach anything they asked for, such as a timesheet or a signed delivery note. Send it to the accounts payable address they gave you. An invoice sent only to the person you worked with may never leave their inbox.
After you send it
Check it arrived
For a new client, or a large invoice, send a short note a few days after the invoice, not a reminder. Ask whether they have everything they need to approve it. This is when you find out about a missing PO or a supplier form, while there is still time to fix it before the due date.
Subject: Invoice [Invoice number] received?
Hi [First name],
Just checking invoice [Invoice number] for [Amount] reached you, and that it has everything your team needs to approve it. It's due on [Due date].
If anything is missing, let me know and I'll send it today.
Thanks,
[Your name]
Remind before the due date
A courtesy reminder a few days before the due date keeps the invoice in front of the approver. Keep it short and friendly. Our payment reminder email templates include one for this point, and others for the due date itself.
If the invoice does go overdue, that is a different job, and our guide to unpaid invoices covers how to chase it.
Incentives and consequences
Discounts for paying early
An early payment discount, such as 2% off for payment within 10 days, can move some clients up the queue, at the cost of margin. The early payment discount guide shows how to tell whether it pays for itself.
Late fees and interest
Late fees work best agreed in advance, not announced on an overdue invoice. In the US, what you can charge depends on your contract and your state: see late fees on invoices. In the UK, businesses have a statutory right to interest and compensation on late commercial payments: see late payment interest.
Learn which clients pay late
Keep a note of how many days each client actually takes to pay, not just their terms. Your accounts receivable aging report shows who is overdue today. Over a few months, it also shows who is always overdue.
When a client is consistently late, act on the pattern rather than chasing the same way every month:
Ask what is causing it. It may be one approver, or a payment run you keep missing.
Move your invoice date so it lands in time for their run.
Ask for a deposit or shorter terms on new work.
Stop starting new work while older invoices are well overdue, and tell them that is the rule before you apply it.
If your days sales outstanding keeps climbing across all clients, look at which habit above has slipped.
A checklist before every invoice
[ ] Terms agreed in writing before the work started
[ ] Sent to the client's accounts payable address: [AP email]
[ ] PO number included: [PO number], or client confirmed none needed
[ ] Client's legal name and address correct
[ ] Description matches the work they agreed
[ ] Due date written as a date: [Due date]
[ ] Payment details and a contact for questions included
[ ] Supporting documents attached: [Timesheet, delivery note, other]
[ ] Sent in time for their payment run on [Payment run date]
[ ] Receipt check scheduled for [Date]
Frequently asked questions
How do I get clients to pay on time?
Agree the terms in writing before the work starts, and find out how the client pays: who approves invoices, whether they need a PO and which days they pay suppliers. Then invoice promptly, to the right address, with everything needed to approve it. Check that new clients have received each invoice, and remind them shortly before it is due.
Why do clients pay invoices late?
Usually because something in their process stopped the invoice, not because they chose not to pay. The common causes are an invoice sent to the wrong person, a missing PO, a missed payment run, an approver who has not acted, or terms that were never agreed. Cash flow problems happen too, but rule out the process problems first.
Should I offer a discount for paying early?
Only if getting paid sooner is worth the margin you give up. Some clients will move your invoice forward, and others will take the discount and pay late anyway. Work out the cost first, and state the conditions on the invoice so there is no argument about who qualifies.
Should I ask new clients for a deposit?
For a new client, a large job or a long project, a deposit is a reasonable request. It reduces how much you are owed at any one time, and a client's response to the request tells you something about how they will pay. Put the deposit in the proposal and make it due before the work begins.
What should I do if a client is always late?
Find out why first. It is often a fixable process problem, such as a missed payment run or a single slow approver. If the cause is fixed and they are still late, change the terms for new work: a deposit, shorter terms or work that pauses while older invoices are overdue. Tell them the new terms before you apply them.
How The AR Agent handles this
Even with these habits, some invoices still slip. The AR Agent handles those. It works with QuickBooks or Xero and your Gmail or Outlook inbox, and follows up overdue invoices by email at the right time for each customer. It reads the replies, so when a client says the invoice is waiting on a PO or went to the wrong contact, it identifies that blocker instead of sending another reminder. "We'll pay on Friday" becomes a tracked promise, followed up if Friday passes. Every email, promise and blocker stays recorded against the customer, which shows you which clients need different terms.
None. This guide uses invented examples and contains no statistics. Legal points are general information only and link to our guides that cite the official sources.