By Paras Saini & Shubham Sharma ·
How Long Before an Invoice Is Overdue?
The invoice was due yesterday. Or was it 30 days ago? Payment terms define exactly when your overdue clock starts — and most freelancers get this clock wrong in two ways: waiting too long to set terms, and waiting too long to act once the date passes. This guide gives you the exact dates, what happens legally when no terms are stated, and why Net 14 outperforms Net 30 for getting problems detected early.
Key takeaways
- An invoice is overdue the day after the due date — not the day you notice it's unpaid.
- Net 30 means the invoice is due exactly 30 calendar days from the invoice date; overdue starts day 31.
- UK law sets a 30-day default for B2B invoices with no stated term — and entitles you to 8% above base rate in statutory interest from the first day overdue.
- Net 14 beats Net 30 for freelancers: you identify payment problems at day 15 instead of day 31, when the debt is far easier to collect.
- Act within 24–48 hours of the due date passing — every day you wait signals that late payment has no real consequences.
When Is an Invoice Officially Overdue?
An invoice is overdue on the day after the payment due date if payment has not been received.
Examples:
- Invoice issued 1 January with Net 30 terms → due date is 31 January → overdue from 1 February
- Invoice issued 1 January with Net 14 terms → due date is 15 January → overdue from 16 January
- Invoice issued 1 January with "due on receipt" → overdue immediately or after 7 days (depending on jurisdiction)
Important: The overdue clock does not start when you notice the invoice is unpaid — it starts the day after the due date. This is why systematic tracking matters. Use the Net Terms Due Date Calculator to calculate exact due dates for your invoices.
Common Payment Terms Explained
| Term | Meaning | Overdue from |
|---|---|---|
| Due on receipt | Payment expected immediately when invoice is sent | Day 1 (or after 7 days — reasonable interpretation) |
| Net 7 | Payment due within 7 calendar days of invoice date | Day 8 |
| Net 14 | Payment due within 14 calendar days of invoice date | Day 15 |
| Net 30 | Payment due within 30 calendar days of invoice date | Day 31 |
| Net 60 | Payment due within 60 calendar days of invoice date | Day 61 |
| Net 90 | Payment due within 90 calendar days of invoice date | Day 91 |
| EOM (End of Month) | Payment due at the end of the month the invoice was issued | Day 1 of the following month |
"Net" in payment terms means the full (net) amount is due — it is not a discount term. "2/10 Net 30" means a 2% discount if paid within 10 days, otherwise full amount due in 30 days. UK businesses can charge statutory interest once an invoice becomes overdue.
Due Date vs. Overdue — What Changes?
The distinction between due and overdue matters because your response should be different:
On the due date (not yet overdue)
Send a friendly payment due reminder. Assume oversight, not bad faith. Keep the tone warm — this is not a chase, it's a courtesy.
1–7 days overdue
Send a first overdue reminder. Polite but direct — "I notice Invoice #[NUM] is now overdue." This is your first formal chase. See: payment reminder email templates.
7–30 days overdue
Escalate — second and third reminder, phone call attempt, late fee notice. See: How to Chase Overdue Invoices.
30+ days overdue
Formal overdue letter. Consider late fees. Escalation path begins. See: overdue invoice letter templates.
What to Do Within 48 Hours of an Invoice Going Overdue
The 48-hour window matters more than most freelancers realize. Research on invoice recovery consistently shows that invoices chased within 2 days of the due date are paid significantly faster than those where follow-up starts a week or two later. Waiting signals that late payment has no real consequences. Here is what to do immediately:
- Log the overdue date. Record exactly when the invoice became overdue. This starts your documented paper trail — critical if this ever reaches small claims.
- Allow one business day for banking delays. A payment initiated on the due date may not clear until the next business day. Give it 24 hours before sending the first reminder.
- Send the first overdue reminder (Day 1–2). Short, professional: invoice number, amount, due date, payment details. Keep the tone neutral-friendly — assume oversight, not bad faith. Most late invoices at this stage are genuinely forgotten.
- Plan the full chase sequence upfront. Don't wait to see if the reminder works before deciding what to do next. Map your follow-up dates now: Day 7, Day 14, Day 30, Day 45–60. Use the follow-up schedule planner to auto-generate these dates from any due date.
Clients who are chased within 48 hours of the due date know you track invoices actively. This awareness alone shortens average payment time — they can't deprioritize an invoice when they know a reminder will arrive immediately.
Which Payment Terms Should You Use?
The right payment terms balance your cash flow needs against your clients' payment processes.
- Freelancers & sole traders: Net 14 is the default recommendation. It shortens the cash cycle and means you identify problems while the debt is fresh.
- Small agencies and studios: Net 14 to Net 30. Larger corporate clients may require Net 30 due to their internal payment processes — this is usually acceptable.
- Dealing with large corporates: Net 30 is standard. Avoid agreeing to Net 60 or Net 90 unless the contract value justifies the cash flow hit.
- High-risk or new clients: 50% deposit upfront, balance Net 14 on delivery. Reduces your exposure if the relationship breaks down.
For more on preventing late payments, see: How to Avoid Late Payments — 9 Prevention Strategies.
Ready to Track Your Invoices Visually?
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Frequently Asked Questions
When is an invoice considered overdue?+
An invoice is overdue the day after the payment due date passes without payment received. Net 30 invoice issued 1 January → due date 31 January → overdue from 1 February. The overdue clock does not start when you notice it's unpaid — it starts the day after the due date, regardless of whether you have sent a reminder. This is why systematic tracking matters: you need to know the exact day overdue without having to check each invoice manually.
What does Net 30 mean on an invoice?+
Net 30 means payment is due within 30 calendar days of the invoice date. Issued 1 February → due date 2 March (or 3 March in a leap year) → overdue from 3 March (or 4 March). 'Net' refers to the full balance due — it is not a discount term. 2/10 Net 30 is a different structure: 2% discount if paid within 10 days, otherwise full balance in 30 days.
Is there a legal definition of when an invoice is overdue?+
In the UK, the Late Payment of Commercial Debts Act 1998 defines B2B invoices as overdue after 30 days (or the agreed term if less than 60 days) — and entitles creditors to statutory interest of 8% above Bank of England base rate from day one of overdue status. In the EU, the Late Payment Directive sets the same 30-day standard. In the USA there is no federal definition — the invoice's stated terms control everything.
What if I sent an invoice with no due date — when does overdue start?+
In England and Wales, the Late Payment Act applies a 30-day default for B2B invoices with no stated term. In the US, courts interpret 'a reasonable time' — typically 30 days. In practice, clients without a stated due date feel no urgency to pay, and it's harder to chase professionally. Fix it immediately: send a follow-up email stating 'Please treat this invoice as due within 30 days of the invoice date, i.e., by [date].' Update your invoice template before the next one goes out.
Should I use Net 30 or Net 14?+
Net 14 for most freelance and agency work. The math: with Net 14, a problem surfaces at day 15. With Net 30, the same problem surfaces at day 31 — when the project is less fresh, the client has moved on mentally, and the invoice is harder to collect. Most clients accept Net 14 without issue. Large corporates with approval cycles may require Net 30 — that is reasonable. If a client requests Net 60 or Net 90, factor the extended credit period into your rate.