Here's the uncomfortable truth about overdue invoices: most of them are partly your fault. Not the non-payment itself — but the invoice that went out a week after the job, the due date in small print, the silence until day 40 followed by a frustrated phone call. Customers learn how seriously you treat your own receivables, and they prioritise accordingly. A calm, consistent escalation process gets you paid faster and preserves the relationship, because nothing in it is personal. Here's the playbook.
Before anything is overdue
Invoice immediately. The single biggest determinant of when you get paid is when you invoice. Same day as delivery — not Friday, not month-end. Every day of invoicing delay is a day added to your debtor days before the clock even starts.
Make paying frictionless. Clear due date (a date, not "14 days from EOM"), bank details and a payment link on the invoice, card or direct-debit options for smaller amounts. Each step you remove is days off your average.
Set expectations at the start. Payment terms belong in the quote and the onboarding conversation, not as a surprise on the first invoice. For new or large customers, deposits and progress payments aren't rude — they're standard, and the customers who resist them are telling you something useful.
The escalation ladder
Day 1 overdue — the friendly nudge. A short, automated email: invoice attached again, due date noted, "may have slipped through." No apology, no edge. Most software can send this automatically, and most invoices that were simply forgotten get paid here.
Day 7 — the human follow-up. A personal email or quick call from whoever owns the relationship's admin (not the owner yet). Tone: helpful. The script that works: "Just checking invoice 1042 reached the right person and there's nothing holding it up — is there anything you need from us?" That last clause matters: a surprising share of late payments are stuck on a missing PO number, a query nobody raised, or an approval bottleneck. You can't fix what you haven't asked about.
Day 14 — the direct conversation. A phone call, not an email, asking plainly: "When can we expect payment?" Get a date. A specific commitment ("Thursday's payment run") converts most stragglers, and a customer who won't give a date has just told you this is a real problem, not a timing one.
Day 21–30 — the owner-to-owner call and the consequence. Now it's the owner or senior person, and the message gains a consequence: future work on hold, supply paused, or the account moved to prepayment until cleared. Stay courteous, stay factual — "We value the work, and we can't keep supplying ahead of payment" is a complete sentence. This is also the point to offer a payment plan if the customer is in genuine difficulty: a realistic schedule that's kept beats a standoff that isn't.
Beyond 45 — decide, don't drift. Options: a formal letter of demand, debt collection, or — for amounts that justify it — legal recovery. Each has costs in dollars and relationship; what costs more is the zombie debtor you chase half-heartedly for a year. Decide a threshold policy in advance (e.g. unpaid at 60 days with no plan → letter of demand automatically) so the decision is process, not mood.
Make it a system, not a personality
The whole ladder should run on schedule regardless of how busy you are, which means: automated reminders configured once, a weekly fifteen-minute debtors review with the over-30 list and one named action per account, and one person who owns the function. Consistency is the kindness here — customers experience a predictable process as professional; they experience sporadic chasing as personal.
FAQ
Should I charge late fees or interest?
You can if your terms provide for it, and the presence of the clause has more effect than its enforcement. Many SMEs get a better result from the inverse: modest discounts for genuinely fast payment on large accounts, used selectively.
What about my biggest customer paying chronically late?
Price it in or fix it — knowingly carrying 60-day money at 30-day prices is a discount you never agreed to. Large customers respect negotiated terms more than hopeful ones; ask for the meeting, and trade something explicit (terms for volume, terms for direct debit) rather than absorbing it silently.
When should I stop work for non-payment?
Earlier than feels comfortable. Continuing to supply an account that's already a problem converts a bad debt risk into a bigger one. "Supply resumes on payment" is the most clarifying sentence in the collections vocabulary.
Slow payers are usually a symptom of missing systems, not bad customers. Our free Business Health Check takes five minutes and shows you where the leaks are.
About the author
Nick Lucock
Chief Executive Officer, Valont
Nick leads Valont's day-to-day operations across Finance, People, Operations and Growth. He writes about how the work actually gets done — the processes, systems, and tools that keep Australian SMEs compliant and growing.
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