How to chase an overdue invoice

An overdue invoice is rarely a sign someone's trying to avoid paying you — it's far more often a genuine oversight, a busy accounts team, or an invoice that's slipped down someone's inbox. Chasing it well means following up promptly and consistently, without either letting it slide or coming across as heavy-handed before you know what's actually going on.

When to start following up

There's no universal rule, but a sensible default is: a short heads-up before the due date, then a direct follow-up within a few days of it passing, and further reminders roughly weekly after that if it's still unpaid. Waiting too long to send the first overdue reminder makes it easier for a client to forget entirely; following up the moment it's a day late can feel disproportionate for what's often just a delay.

For a fuller breakdown of timing by how overdue an invoice is, see when to send invoice reminders.

Escalating professionally

The point of escalation isn't to sound angrier each time — it's to make the situation progressively harder to ignore while staying factual. A useful structure:

• First follow-up: friendly, assumes an oversight, asks for confirmation of payment or a timeline.
• Second follow-up: more direct, restates the amount and original due date, asks for a specific response.
• Third follow-up: firmer, notes how long it's been overdue, and states what happens next if it isn't resolved.

Jumping straight to a firm tone on the first message often does more damage to the relationship than the late payment itself — most clients respond well to a professional nudge and poorly to being treated as if they're avoiding you before you've given them the chance to explain.

Email vs phone

Email is the right starting point for almost every overdue invoice — it's low-pressure, creates a written record automatically, and doesn't require catching someone at their desk. A phone call earns its place once an invoice is well overdue, involves a larger amount, or when emails have gone unanswered for more than a reminder or two. A short, friendly call ("just checking in on Invoice #1042 — did it come through okay?") often surfaces the real blocker — an approval delay, a dispute, a change of contact — much faster than another email would.

Keeping records

Track every reminder you send and every response you get, even informally. At minimum, note the date and channel for each follow-up, and a one-line summary of any reply or phone conversation — including what was promised and when. This matters for three reasons: it stops you from double-chasing or under-chasing an invoice, it gives you (or a teammate) full context if the account needs to be picked up by someone else, and it gives you a clear record if the situation ever needs to go further.

Using a reminder sequence

Deciding, invoice by invoice, when to follow up and what to say is exhausting once you have more than a couple of clients. Planning the stages in advance — a sequence of reminders at set intervals, each with its own tone — means you're not making that decision under pressure every time an invoice goes overdue. It also means nothing gets forgotten simply because you were busy with other work that week.

Payment plans for larger or strained invoices

Not every late payment is about unwillingness — sometimes a client is genuinely short on cash for a large invoice. Offering to split it into instalments, each with its own due date and reminder, can get you paid faster and more reliably than insisting on one lump sum, while keeping the relationship on good terms. It's a reasonable middle ground worth raising before assuming the invoice is a lost cause.

Maintaining the client relationship

The businesses that chase invoices well tend to do a few things consistently: they assume good faith until there's a clear reason not to, they keep language factual rather than emotional even as the tone firms up, and they separate the invoice from the relationship — being clear about money doesn't have to mean being cold. A client who feels chased fairly is far more likely to keep working with you than one who feels accused.

What to do when payment is seriously late

If an invoice stays unpaid well past your final reminder, your realistic options are limited but real: send one last formal notice stating the situation plainly, consider pausing or declining further work for that client until it's resolved, and — for invoices large enough to justify it — look into mediation or a collections agency. What's actually appropriate depends heavily on the amount involved, your contract terms, and the rules where you and your client operate, so this is a good point to get advice specific to your situation rather than follow generic guidance.