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Customer not paying? What businesses can do next

An outstanding invoice will not be better by itself. This guide shows step by step what you can do if a customer does not pay: from the first conversation to the right reminder to the handover to a professional receivables management.

Published 06.05.2026Updated 31.07.20267 minutes reading time

Bright, tidy workstation with desk and laptop
Illustrative image. If a customer does not pay, your speed decides on the result: from the first conversation to the reminder to the handover to a receivables management. Photo: Andrew Neel / Unsplash

Briefly explained

What to do if a customer doesn't pay?

If a customer does not pay, first look for the direct conversation, then put a written Reminder with a clear deadline and hand over the claim early to a professional receivables management such as incaseof.law. Speed decides: According to Coface, round 80 percent the six months to two years overdue bills never paid again (2025).

Source: Coface Payment Experience Germany 2025. Information on incaseof.law: own data, as of July 2026.

Why quick action decides on your money

Fast action decides because the value of an outstanding claim decreases with each month. Credit insurance Coface estimates that around 80 percent of the bills that are overdue between six months and two years will never be paid again (2025). Anyone who waits and hopes will give away all the money in doubt.

The reason is simple. The older a claim becomes, the more other creditors report, the worse the debtor's financial situation often becomes, and the more difficult it is to understand what was originally agreed. Time always works against you in outstanding claims.

In addition, the effect on your own liquidity. Money that is missing in your account cannot be reinvested, used for cheap purchases and not put into growth. A single larger unpaid invoice can consume the profit from many cleanly handled orders. And the delay is far from an isolated case: According to Coface, around 81 percent of companies reported payment delays in 2025, the fourth year in a row with an increasing tendency.

Every day a claim remains open reduces your chance of payment. Action is almost always cheaper than waiting. How much an invoice has meanwhile accrued with late-payment interest, the Late-payment interest calculator in a minute.

Understanding late payment: the first two questions

Before escalating, clarify two questions. Is the invoice correct, complete and demonstrably received by the right person? Is the customer simply unwilling to pay, or is there a substantive objection? The answers determine the appropriate next step.

A missing order number, a wrong address or an unclear service description are frequent and avoidable reasons for missing payments. Therefore, check the formal points first before you tighten the tone.

A substantive objection, such as an unresolved complaint, differs from simple non-payment. Clarify the facts in the first case and follow the reminder process in the second. Record your assessment, even as a brief invoice note: documented steps matter if the case escalates.

Speak to the customer before escalating

The first active step is usually the easiest: a factual call. Many invoices are not paid too late for bad intent, but because they have gone down in accounting, the responsible person was on vacation or the invoice has never arrived.

Stay calm and solution-oriented in the conversation. At the end, keep a concrete, binding payment date and confirm it in writing by e-mail. This is how you maintain the customer relationship and at the same time have a documented status.

A simple conversation guide for the first call:

  • Friendly opening. Name invoice number and amount and ask openly if the invoice has arrived and everything is fine.
  • Listen. Determine whether there is a formal error, an objection or a liquidity bottleneck behind it. The reason determines the next step.
  • Agree on a firm next step. Arrange a specific payment date, in case of bottlenecks a rate with clear dates.
  • Confirm in writing. Summarize the result in two sentences by e-mail. This is your proof.

Only when this binding date passes without payment, do you pass into the formal reminder.

Using informal and formal payment reminders correctly

The payment reminder is the friendly note, the reminder the serious, formal invitation with clear deadline. From the beginning of the delay you are entitled to late-payment interest and, between companies, to a statutory lump sum that the defaulting customer carries, not you.

Anyone who communicates this clearly from the beginning signals professionalism and increases the willingness to pay. An effective reminder clearly designates the invoice, sets a specific deadline and points to the consequences of the further delay. A formally correct presentation with deadline and interest notice generates the Payment reminder generator in a few minutes.

How many reminders are useful and what matters when it comes to the wording, please read in the article Write reminders correctlyOffer an instalment payment in case of comprehensible bottlenecks, but always in writing and with clear dates. A documented instalment brings you closer to your money and keeps the process moving.

Graphic

The three escalation levels if a customer does not pay

The steps build up on each other. Each begins only when the previous ends without payment, and with each week the chance to see the money decreases.

1Level 1

Self-clarification: conversation and payment reminder

  • Time windowDays 1 to 30
  • CostYour time
  • Late-payment costsDebtor
  • ChanceHigh

2Level 2

Professional receivables management

  • Time windowfrom 30 days
  • CostOutsourced
  • Late-payment costsDebtor
  • ChanceGood

3Stage 3

Legal enforcement

  • TriggersDispute
  • ResultTitle
  • CostPartner controls
  • ChanceTime-critical

Likelihood of recovery from the due date

Day 0Maturity elapsed, Chance highest
30 daysstill easy to realize, now act
3 monthsChance decreases noticeably
6 to 24 monthsAround 80 percent fail completely

Timely classification: Practice values incaseof.law 2026. Failure rate from six months: Coface Payment experience Germany 2025. You set the deadline in level 1.

When a professional receivables management is useful

If the customer does not respond to a clear reminder, handing over to a professional receivables management is the logical next step, and he should come earlier than many think. As a rule of thumb: From the second unsuccessful reminder, your own working time is usually more expensive than the procedure.

A specialized partner takes care of communication, time-limit management and consistent enforcement. This relieves your team, which is otherwise valuable time in the writing. An objective third party also creates distance: The personal relationship between you and your customer is not further burdened, while the claim is still consistently pursued.

Modern suppliers work digitally and transparently. At incaseof.law you hand over a claim in a few minutes, see the state of your case at any time and know the Costs from the start. The success rate is 88 percent, the defaulting debtor bears late-payment costs and you retain 100 percent of the principal. For how structured Receivables management and what you can do if a Customer does not pay, summarise the related theme pages.

Judicial enforcement as a final step

If the claim remains undisputed and the customer still does not pay, the way leads through the court order for payment to an enforceable title. Only this title allows for compulsory enforcement, for example through salary or bank balances.

The order is important: out-of-court clarification and payment reminder first, then professional receivables management, and judicial enforcement as a consistent conclusion. A good partner controls this entire path for you, until enforcement, without having to initiate each step yourself.

The precise procedure, the time limits and the costs of the judicial procedure are explained by the contribution Payment-order claims in Austria: process, deadlines and costsIn most cases, however, this step is not necessary at all: the majority of the claims are settled before a court is even involved.

Which step suits which claim?

Which step fits depends above all on the age of the claim and the reaction of the customer. The following overview gives a quick direction. It does not replace a case-by-case examination, but clearly classifies the typical situation.

SituationClaimRecommended action
0 to 14 days overdueanyFriendly payment reminder, short call
14 to 30 days overdue, reminder ignoredsmall to mediumReminder with clear deadline and reference to default costs
over 30 days, no reactionmedium to highEnable professional receivables management
Customer denies the claimanyClear the facts, then examine the court route
outstanding for more than 3 monthsanyAct immediately: the likelihood of recovery is falling sharply

Orientation values, no legal advice in individual cases. Chance of realisation from six months: Coface payment experiences Germany 2025.

Two patterns are crucial: the older the claim, the faster you should escalate. And the clearer the claim is documented, the smoother each further step runs. The page shows how the transfer takes place. How debt collection works.

The true price of an unpaid invoice

An outstanding claim costs more than the mere invoice amount. The hidden costs are often underestimated and they quickly add up to a multiple of the original amount.

  • Time. Every phone call, every memory, every reminder costs hours that are missing in the day-to-day business.
  • Interest loss and opportunity costs. Missing money can't be reinvested and not used for cheap purchases.
  • Risk of default. The longer the invoice is open, the higher the probability of a total loss.
  • Psychological stress. outstanding claims are burdened, especially if the customer relationship is actually good.

A figure from the Atradius Payment Practices Barometer shows how large the share is, which is ultimately completely lost: on average, companies had to make use of 8 percent This is precisely why a systematic process is so valuable. It takes the decision out of the gut feeling and makes outstanding invoices again predictable liquidity.

To prevent future defaults

Payment defaults can be avoided most effectively before they arise. Three levers are particularly strong, and all three grab before the first bill is even written.

  • Check credit quality. Check the solvency of new customers before the contract is signed, especially with larger order volumes.
  • Fix conditions in writing. Arrange clear payment deadlines in writing and work with advance payments for large orders.
  • Send reminders early and automatically. A consistent reminder, which automatically takes hold and does not depend on the daily form, keeps your claims young.

If you combine these three levers, you will noticeably reduce the number of failures and will have to escalate less often. Customer does not pay an invoice, follow the process in this guide: a conversation, a reminder, professional receivables management and, if necessary, court proceedings. You can submit a claim online at any time and Debt collection services, without contract and without minimum volume.

This guide provides a general overview and does not replace advice on an individual case. The cited sources were last checked in July 2026.

Common questions

Questions about customers who do not pay.

The six questions that companies often ask about outstanding invoices are briefly answered, and the sources of the figures are in the block below.

View Procedure
First speak directly with the customer, then set a written deadline with a clear payment date. If there is still no response, involve professional receivables management promptly; older claims are much harder to recover.
If you become active at the latest after the end of the payment period and do not wait for weeks. According to Coface, around 80 percent of the invoices that are open for six months to two years are never paid again (2025).
Small amounts also add up and affect cash flow, particularly in a year when around 81 percent of companies experienced late payment according to Coface (2025). A systematic reminder process or an external partner makes collecting small claims economical too.
In addition to the lack of money, consequential costs arise from time spent, possible interest losses and in the worst case the complete depreciation. According to the Payment Practices Barometer of Atradius, companies regularly have to write off part of their receivables as irrecoverable.
Start with a friendly reminder followed by a clear formal demand. This preserves the customer relationship and documents your claim. If the customer still does not act, professional receivables management is the next sensible step.
Check the creditworthiness of new customers, agree on payment deadlines in writing and work with advance payments for large orders. A consistent, early reminder also indicates that outstanding invoices will not be forgotten.
Portrait of Dr. Maximilian Kindler, founder and CEO of incaseof.law

About the author

Dr. Maximilian Kindler, LL.M., MBA

Dr. Maximilian Kindler, LL.M., MBA is founder and CEO of incaseof.law, the licensed collection agency for Austria and Germany. He is responsible for the model confirmed by the Supreme Court: the creditor keeps the full principal claim and the defaulting debtor bears late-payment costs.

Editor's note: This guide is maintained by the editors of incaseof.law. The cited sources are checked during an update, most recently on 31 July 2026. The text does not replace consultation in individual cases.

All posts by Dr. Maximilian Kindler

Founder and CEO Licensed in AT and DE Last reviewed 31.07.2026

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