You sent the invoice. The work is done. So why hasn't the money arrived? The gap between “invoice sent” and “payment cleared” is rarely about payment terms alone — there are real causes inside your client's accounts payable process that you can actually influence.
Invoice processing time is the time it takes from when your client receives your invoice to when their accounts payable team authorizes the payment. It's separate from your payment terms.
You send invoice
Day 0
Client processes it
Day 3–7
Payment terms start
Net 30
Money arrives
Day 37+
Typical B2B: 3–7 business days for processing + payment terms
Large companies and government clients run invoices through purchase order (PO) systems. If your invoice doesn't include the PO number, it gets held in a queue or bounced back entirely. Fix: always ask for a PO before starting work.
Sending your invoice to your day-to-day contact (the project manager, the marketing director) instead of the accounts payable department adds 3–5 days as it gets forwarded. Fix: ask “who should I address invoices to?” before work starts.
Some large organizations use automated invoice processing software (like Tungsten, Basware, or SAP) that requires UBL/XML format or specific PDF layouts. Paper or image invoices get manually keyed in — which takes time and introduces errors. Fix: ask what format their AP team prefers.
Many companies require manager approval for invoices above certain amounts. If the approving manager is on holiday, travelling, or just busy, your invoice sits in their inbox for days. You can't fix this directly, but following up proactively reduces the wait.
Many companies only run payment batches twice a month — typically on the 15th and the last working day. If your invoice arrives on the 16th, it waits until the end of the month. This isn't about payment terms — it's about their treasury cycle. Fix: send invoices early in the month (before the 10th).
Email your contact: 'Will you need a PO number on the invoice for this project?' It takes 30 seconds and can save 2 weeks of delay.
Ask: 'Who should I address the invoice to, and do you have a preferred format (PDF, UBL/XML)?' Note this for every new client.
If you know a client runs payment batches on the 15th or month-end, send your invoice before the 10th of the month. Invoice late and you wait another 30 days.
Don't wait until the invoice is overdue. A quick 'just confirming you received invoice #INV-042 — anything needed to process it?' email after 5 days catches problems before they become delays.
Once the due date passes, every day of delay costs you. Automated reminders (day 3, 7, 14, 30) keep the pressure on without manual effort.
| Client type | Official terms | Actual typical | Notes |
|---|---|---|---|
| Government (EU) | 30 days (EU directive) | 45–60 days in practice | Strict rules, slow reality |
| Enterprise (500+ employees) | 30–45 days | 35–50 days | PO required; approval chains |
| Mid-market SMB | 14–30 days | 21–35 days | Usually reasonable |
| Small business | 14 days | 14–28 days | Cash flow dependent |
| Startups | Varies widely | 7–45 days | Often pay fast or very late |
| Consumers / B2C | On receipt | 0–14 days | Usually pay on day of invoice |
Processing delays are frustrating — but the longer invoices go unacknowledged, the worse the situation gets. Chaser sends a structured series of reminders starting 3 days after the due date, escalating in tone every 7 days. Even if processing took longer than expected, the reminders kick in on schedule and push your invoice to the top of the pile.
Most Chaser users see their first payment within 5 days of the first automated reminder. The second reminder (day 7) typically resolves the remaining 60%.
Chaser sends escalating payment reminders automatically — so processing delays become your client's problem, not yours.
Try Chaser free →Invoice processing — the time from when your client receives an invoice to when payment is authorized by their accounts payable team — typically takes 3–7 business days for well-organized companies. Add your payment terms on top of that: Net 30 means 30 days before payment is due, plus 3–7 days for processing = up to 37 business days from invoice to money in your account.
The top causes of slow invoice processing: (1) Missing PO number — many large companies won't process invoices without a purchase order number. (2) Wrong billing contact — sending to the wrong person adds days as it gets forwarded internally. (3) Incorrect invoice format — some AP systems only accept PDFs, others require UBL/XML. (4) Month-end batching — many companies only run payment batches on the 15th or last day of the month.
Payment terms (Net 30, Net 14, etc.) define how many days the client has to pay after receiving your invoice. Invoice processing time is what happens inside the client's accounts payable department before they authorize the payment. Both add up. If a client has Net 30 terms and takes 7 days to process invoices, you might not see money for 37 days from sending the invoice.
A Purchase Order (PO) number is a reference number the client's procurement team issues before work begins. It links your invoice to their internal approval and budget allocation. Many large companies and government bodies will reject or delay invoices that don't include the PO number. Always ask 'Do you have a PO number for this work?' before starting — and include it on every invoice.
Yes — and you should. A 5-day 'acknowledgement check' (not a payment chase) is normal: 'Hi, just confirming you received invoice #INV-042 — please let me know if you need anything to process it.' This catches problems early (missing PO, wrong contact, format issues) before they become 30-day delays. Chaser's reminder system handles this automatically.