If a client pays late once, it's a small hiccup. But if the client pays late every time, it creates a cash flow problem for your consulting business. The solution? A mix of structure and strategies to avoid late payments becoming an ongoing headache.
Project complete. Invoice sent.
...Yet your bank account is still empty three days later.
Nearly four in five companies across Western Europe deal with late payments, and a quarter lose up to 5% of their revenue to it.
For a solo consultant, a 5% loss of income can be the difference between a comfortable month and a stressful one.
To reduce your risk of late-paying clients, you need to build structures in your business that make lateness expensive and protect your time and revenue. If a late payment happens anyway, here's how to handle it without risking the relationship.
Why do clients pay late in the first place?
For the most part, there are three reasons why a client pays late:
- A cash flow problem
- An invoice backlog with no urgency
- A lack of task accountability on the client's end
Understanding what you're dealing with makes solving the issue much easier. For example, if a client is having a cash flow problem, that's a very different conversation than a client who accidentally missed your invoice email.
Before placing all the blame on the client, it's always worth checking your own invoicing habits. An invoice that goes out weeks after the work is complete, or that lacks details on what is being billed, gives clients an excuse to sit on it.
Read more: Managing Multiple Clients: A System for Solo Consultants
How to structure payment terms to avoid late payments
Another reminder email isn't your first line of defence against late payers. It starts with your contract and removing the conditions that cause the problem.
Should you ask for an upfront deposit?
Yes, especially if it's your first time working with a client. By asking for money before any work starts, you're covering your financial bases.
A deposit shows that the client can pay and is willing to put their skin in the game.
Some consultants charge a 100% fee upfront, while others use a split fee structure.
For example, a 50% fee is due before work starts, with the balance due on delivery. For larger projects, you can split the fee into instalments: one third due on signing, the next at a defined midpoint, and the remainder on delivery.
What if the client baulks at a deposit? Treat it as information and decide on the type of clients you want in your business.
Would you rather lose the client now or spend time chasing payments later?
Using milestone payments to protect your projects
A deposit protects the start of a consulting project. Milestone payments protect the middle and keep your cash flow consistent.
What you can do is structure a project so that a defined chunk of work can't begin until the previous part has been paid for. It helps to remove the situation where you've done 80% of the work and an unpaid invoice is still lingering.
An easy hack to make the milestone process seamless is to use the right invoicing set-up. A tool like Kiaro lets you invoice per project milestone rather than only tracked hours.
In practice, your invoice flow will look like this:
Deposit > Midpoint milestone > Project delivery
Depending on how you work, your "midpoint milestone" could include multiple milestones that require payments before you move on to the next phase of the project.
Read more: Hourly Billing Guardrails: Clauses and Change Orders to Prevent Scope Creep
How to handle overdue invoices
Prevention doesn't catch every client. Things happen, and sometimes someone will end up paying late. If you find yourself in this situation, here's how to respond without turning an overdue invoice into a fight.
What should you do the moment an invoice becomes overdue?
To get paid fast, you need to follow up before and after an invoice is due.
Once you set a due date for an invoice, you can either manually send an email two or three days before the due date or automate the process with invoicing software.
The email can say something like: "Just a reminder that invoice #1111 is due Friday. Let me know if you need anything to process it."
If the due date passes with no payment, follow up the same day. Again, you can manually send the email or rely on invoicing software to chase the payment for you.
With Kiaro, you can rely on the default invoicing schedule or configure your own:
- Before due date: The default reminder is three days before the invoice is due.
- After due date: A gentle reminder, by default, one day later.
- Repeat reminders: If still unpaid, follow-up reminders are sent every 7 days (default) and up to a maximum of 3 (default) per invoice.
When an invoice is 14 days past due, Kiaro shows a follow-up banner on the invoice and prompts you to draft a follow-up email. Select "Draft follow-up", and Kiaro writes a stage-aware subject and body using the invoice's amount, due date, days overdue, and your style guide. The tone escalates with the invoice: friendly reminder first, polite but direct next, formal after that.
You can also use the email to remind clients you will pause work on new deliverables until the invoice is paid.
Stop chasing invoices by hand
Kiaro sends the reminder before the due date, the nudge after it, and flags the invoices that have gone quiet, so chasing payment stops being a task you have to remember. Free, no credit card.
Should you charge late fees?
Yes. Including late fees in your contract and statement of work protects your cash flow and incentivises timely payment.
It's standard practice to include a clause stating that late payments will incur a charge of 1 to 2% per month while the invoice is overdue, with a cap on the total charge.
And if you need to enforce it?
Some invoicing tools will automatically apply the late fees, while others will require you to amend the invoice manually.
What if a client always pays late, but you don't want to fire them?
A strategy you can try is to adjust your rate on the next proposal. It's a way to protect the relationship and your business.
If the client asks why, you can explain that the consistent late payments affect your cash flow and the new rate reflects that. If they start paying on time, the rate can come back down.
While it's a firmer approach, it prevents you from absorbing the cost of their poor internal processes that caused the delay.
When is it time to cut a client loose?
After 30 to 60 days, the unpaid invoice is a point where you have two options:
- Write it off: If it's a small amount
- Pursue legal routes: For larger sums, a small claims filing or hiring a collections agency
With the latter, the legal threat tends to prompt payments. Either way, don't feel obligated to take on new work or explain beyond that you'll continue once the outstanding balance is settled.
To stay on top of your client management, invoicing, time tracking and payments, switch to an all-in-one tool like Kiaro. It's built for consultants and has everything you need to run your business from one affordable monthly subscription instead of six.
Frequently asked questions
Should you stop working while an invoice is unpaid?
Yes. It's not unreasonable to pause new deliverables until an overdue invoice is paid. It prevents you from logging more billable hours for a client until the payment issue is resolved.
Does chasing a client for payment damage the relationship?
Chasing a late payment won't ruin a working relationship, as long as it's done respectfully. There isn't anything wrong with being organised and direct about money. A client might have made an oversight with your invoice, and if you don't follow up, you're delaying getting paid even longer.
What percentage should consultants charge for a late fee?
Charging 1.5% per month is standard industry practice. Make sure your payment terms and late-fee penalty are included in your contract and statement of work.