Invoice deadlines: which deadline applies when?

What happens after the due date?

Once the payment term has expired, the invoice is open. Whether and when your client is legally in default depends on the contract and the statutory requirements. A friendly payment reminder can make sense before you send a more formal dunning letter. It does not automatically replace a legal review, though.

Document sending, due date, incoming payments and contact attempts. A traceable history helps you communicate appropriately and keeps open receivables from getting lost between emails.

• Show the due date as a date
• Track installments separately
• Match incoming payments promptly
• Document payment reminders and dunning letters

The limitation period is not a retention period

Limitation concerns whether a claim can still be enforced and can be affected by certain events. The retention obligation, by contrast, concerns your tax and business records. A paid invoice may therefore still have to be kept even though there is no longer an open claim.

The specific period depends on the type of document and the applicable law. Use a current professional source and clarify special cases with your tax advisor. Software should not automatically delete documents just because a payment status changes.

A workable deadline process

When you send an invoice, set a payment term that matches your agreement. The application calculates the due date from it and shows it in the overview, the client view and the dunning run. As soon as a payment comes in, the open amount is reduced and the history stays visible.

Once the deadline has passed, decide deliberately on the next contact. Not every client needs the same tone. A good dunning process supports you with the repetition, but it does not take the decision about goodwill, deferral or legal action off your hands.

What belongs on every invoice

Write the payment term, bank details and contact person so the client can pay without having to ask. The less room for interpretation, the faster an incoming payment can be matched.

Different rules may apply to international or special contract cases. The general checklist is an organizational starting point, not individual legal advice.

Keep due dates visible day to day

A payment term becomes practical when it isn’t only in the PDF. Save the due date as a date, show it in the open-items list and link it to the proof of sending. With partial invoices, each amount gets its own date. That way you can decide in the morning which cases need checking today, instead of searching a long list for handwritten notes.

For clients with a regular payment rhythm you can prepare reminders, but you should tie sending to the actual case. A partial payment, an objection or an agreed deferral changes the next sensible action. Automation may make this information visible; it shouldn’t create a false sense of security.

• Save the due date as its own date
• Handle partial invoices and deferrals separately
• Bring the sending and payment history together

When professional help makes sense

As soon as a claim is disputed, several contracting parties are involved, or collateral and partial payments play a role, a general list of deadlines is no longer enough. Different rules may also apply to international clients, construction work or contracts for work (Werkleistungen), and unusual acceptance terms. Record the facts in order and pass them on to your tax advisor or a legal advisor.

The software can help you not to lose any data: invoice, contract note, sending, payment and communication stay findable. But it doesn’t decide whether a claim is enforceable or which deadline legally applies. This boundary protects you from automation that looks simple but is wrong.