Money & Running the Business
How should I set invoice due dates, reminders, late fees, and automated follow-up?
The short answer
Choose a due date that matches the agreement and your cash needs, then send short, polite reminders before and after it. Use late fees only when they are lawful, clearly disclosed before the sale, and worth the customer friction and administration.
Automation should prevent invoices from being forgotten. It should not send an aggressive message to someone who already paid by another method.
Pick a due date people can understand
“Due upon receipt” sounds immediate but can be ambiguous in a company where invoices require approval. A calendar date is clearer: Due September 18, 2026.
For deposits, make payment the condition for reserving the start date. For milestones, issue the invoice when the named milestone is reached. For established business clients, Net 15 or Net 30 may fit their approval cycle, but you are not required to offer long terms merely because they ask.
Before agreeing, ask who approves invoices, whether a purchase order is required, where invoices must be submitted, and what payment schedule their system follows.
Use a calm reminder sequence
A practical starting schedule is:
- Three days before due: friendly heads-up with invoice link and amount.
- One day after due: confirm it is still outstanding and ask whether anything is blocking payment.
- Seven days after due: request a specific payment date and restate any work-pause term.
- Fourteen days after due: personal outreach and the next step allowed by your agreement.
Adjust for the relationship and amount. Don’t send four reminders in four days.
Each message should include the invoice number, amount, due date, payment link, and a human reply address. Stripe lists reminder emails and automatic collection among its Invoicing tools. Other platforms offer similar settings.
Write reminders like a person
Before due:
Hi Dev, a quick heads-up that invoice 1048 for $425 is due Friday. Here’s the payment link. If your billing team needs a purchase order or different contact name, tell me and I’ll update it.
After due:
Hi Dev, invoice 1048 was due Friday and still shows unpaid on my side. Would you check whether it’s in process? If there’s a problem with the invoice or payment link, reply here and I’ll help.
This is clear without assuming bad intent.
Be careful with late fees
Late-fee rules can limit the amount, timing, wording, or industries that may charge them. Some contracts or customer types may require special notices. Check your own state, local, national, and industry rules with a qualified professional.
If you use a fee, disclose it in the proposal or contract and on the invoice before payment is late. State whether it is a one-time amount or recurring charge and how it is calculated. Don’t invent a fee after the deadline passes.
A work-pause policy is often simpler: “Work pauses when an invoice is seven days overdue and resumes after cleared payment.” Apply it consistently and consider downstream deadlines before pausing.
Prevent automation mistakes
Before enabling reminders:
- Match payments received outside the invoice system.
- Confirm canceled invoices are excluded.
- Test the time zone and send time.
- Make sure replies reach a monitored inbox.
- Review overdue invoices weekly.
If an automatic reminder goes out after payment, apologize, confirm the payment, and fix the matching problem. Don’t blame the software.
Sources and further reading
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