The 1% Rule: Why Waiting on a Late Invoice Costs You Every Week

Why waiting on a late invoice costs you more than you think — every single week

Cory Mayfield

min

At a Glance

Recovery rates on overdue invoices drop by roughly 1% every week after a payment is missed. That is not a metaphor — it is what the data consistently shows across Australian B2B commercial collections.

Key takeaway: On a $70,000 invoice, doing nothing for a week costs roughly $700 in expected recovery value. Act at 30 days, not 90 — the difference in outcome is significant and predictable.

What the Data Shows

Days Overdue	Recovery Rate	Expected Recovery — $50K Invoice
30 days	30–50%	$15,000 – $25,000
60 days	20–35%	$10,000 – $17,500
90 days	15–25%	$7,500 – $12,500
180 days	10–15%	$5,000 – $7,500
12+ months	5–10%	$2,500 – $5,000

These are not worst-case numbers. They are the documented ranges across Australian B2B commercial collections.

Why Recovery Drops Over Time

Older debts get deprioritised. A business managing cash flow will pay the suppliers actively following up. An invoice that went quiet two months ago is not at the top of anyone's list.

Older debts are also harder to enforce. Key contacts leave. The details of the original agreement become less clear. And if the debtor has financial problems of their own, their position may be worse at 180 days than at 60.

What the Numbers Mean in Practice


Weekly recovery decline	~1% per week
Optimal recovery window	First 30 days
Weekly expected value loss — $70K invoice	~$700 doing nothing

Every week of inaction has a dollar cost. Acting at 30 days instead of 60 raises the odds significantly — and combining early action with consistent follow-up produces the best results within the best window.

Three Things to Do This Week

Pull every invoice over 30 days overdue. For each one, calculate the expected recovery at its current age versus what it would have been at day 30. That difference is what waiting has already cost you.
Set up automated follow-up within 24 hours of any invoice passing its due date. That one change produces the biggest improvement in recovery rates for most small businesses.
Write down your 30, 60, and 90-day escalation steps before you need them. Decide once, as policy — not freshly for each invoice under pressure.

Frequently Asked Questions

How quickly do recovery rates decline on overdue invoices in Australia?

Recovery rates decline by approximately 1% per week after a payment default. At 30 days overdue, B2B commercial recovery rates are typically 30–50%. By 90 days, this drops to 15–25%, and by 12 months, recovery rates fall to 5–10% for most commercial debts.

What is a reasonable recovery rate for overdue business invoices?

B2B commercial invoices in Australia have significantly higher recovery rates than consumer debts — typically 30–75% when addressed within the first 60 days, compared to a 12% average for B2C consumer debt. The key difference is documented commercial agreements and access to commercial legal remedies.

Is it worth pursuing an invoice that is more than 90 days overdue?

Yes, but formal tools are typically required. Statutory demands, letters of demand from solicitors, and Security of Payment adjudication all significantly improve recovery rates. Even at 90–180 days, recovery rates of 15–25% mean formal action can still return meaningful value.

About Chargetree

Chargetree is an automated accounts receivable and collections platform built for Australian businesses. We help tradies, contractors, agencies, and service businesses get paid faster — without damaging client relationships. Chargetree integrates with Xero to automate payment reminders, escalation workflows, and collections from just $69 a month. No commissions. No lock-in. Learn more at chargetree.co.