Why payment reminders are critical

Unpaid invoices are one of the most serious problems facing Swiss SMEs. According to the Federal Statistical Office, over 30% of B2B invoices in Switzerland are paid late, with an average delay of 17 days beyond the agreed term. For many businesses, this translates into a liquidity gap that can compromise operational capacity.

The dunning system is the primary tool for recovering overdue receivables before they become uncollectable. In Switzerland, the Code of Obligations (CO) governs payment terms and the consequences of default (Art. 102–109 CO), but does not mandate a specific format: reminders can be automated, sent by email and managed entirely digitally.

Automating reminders doesn't mean being more aggressive — it means being more punctual, systematic and professional. A well-configured system sends the right reminder at the right time, preserves the client relationship and dramatically reduces bad debt rates — all without manual intervention.

The cost of unpaid invoices for your business

Uncollected invoices are not just an accounting problem — they have a direct impact on the financial and operational health of your business. Here are the four areas most affected:

Blocked liquidity

Every uncollected invoice reduces available working capital. For an SME with net margins of 5–10%, a bad debt of CHF 10,000 requires CHF 100,000–200,000 in additional revenue to compensate for the loss.

Hidden administrative costs

Manual reminder management — phone calls, emails, payment verification, ageing schedule updates — consumes an average of 3–5 hours per week for a business with 100+ active clients. Time taken away from productive activities.

Risk of chain insolvency

If your clients don't pay, you can't pay your suppliers. The domino effect of unpaid invoices is the leading cause of financial difficulty for Swiss SMEs, according to a Creditreform study.

Damaged business relationships

Late, inconsistent or overly aggressive reminders damage the client relationship. An automated, graduated process preserves the professional relationship while maintaining firmness on terms.

Swiss data: according to Dun & Bradstreet, the average B2B payment delay in Switzerland is 17 days. 5–8% of invoices become permanently uncollectable, with an estimated impact of CHF 8 billion per year on the Swiss economy.

The three-level reminder system

Swiss practice follows a progressive reminder system, from a friendly nudge to a formal notice. Each level has a specific tone, timing and purpose:

First reminder — friendly nudge

5–10 days after due date

The first reminder is a simple prompt that assumes the debtor's good faith. The tone is polite and informative: it states the amount, the due date and politely asks for payment. No legal consequences are mentioned. This first contact resolves up to 60% of cases — often the delay is due to an oversight or an administrative issue on the client's side.

Second reminder — formal notice

15–20 days after the first reminder

If the first reminder produces no results, a more formal communication is sent. The tone is firm but professional: it restates the amount due, cites the contractual terms and warns that non-payment will lead to further action. It may include default interest (Art. 104 CO: 5% per annum, unless otherwise agreed).

Third reminder — final demand

10–15 days after the second reminder

The last reminder before legal escalation. The tone is peremptory: a final deadline of 10 days is given, accrued default interest is specified, and the debtor is warned that failure to pay will result in debt enforcement proceedings (DEBA) or referral to a collection agency. Registered mail is recommended for evidentiary value.

Swiss legal timelines for default

The Swiss Code of Obligations governs payment terms, default and interest. Here is the legal timeline from invoice due date to enforcement action:

Day	Action / event	Legal basis
Day 0	Invoice due date: the claim becomes payable according to the contractual terms	Art. 75 CO
Day 1+	The debtor is in default if the term was contractually fixed (automatic default) or after a formal reminder	Art. 102 CO
From default	Default interest accrues at 5% per annum (unless otherwise contractually agreed). The creditor is entitled to compensation for further damage	Art. 104–106 CO
After 3rd reminder	The creditor may initiate enforcement proceedings (payment order) through the competent Debt Enforcement Office	Art. 67 DEBA
20 days from PO	If the debtor does not object, the creditor may request dismissal of the objection or continuation of enforcement	Art. 74–88 DEBA

Automated reminder features

An automated dunning system eliminates manual work and ensures no overdue invoice goes unnoticed. Here are the key features:

Automatic level-based dispatch

The system automatically sends the correct reminder (1st, 2nd, 3rd level) based on the number of days past due. No invoice is forgotten, no reminder is sent late.

Customisable templates

Each reminder level has a customisable template with the appropriate tone. You can differentiate by client type, amount, payment history and language (IT/DE/FR/EN).

Open and read tracking

The system records when a reminder is opened and read by the recipient. This data helps decide whether to move to the next level or contact the client by other means.

Automatic default interest

Default interest calculation (Art. 104 CO: 5% per annum) is automatically applied from the default date, with the amount updated in each subsequent reminder.

Ageing dashboard

Real-time view of all overdue invoices, grouped by receivable age (0–30, 31–60, 61–90, over 90 days). Risk indicators and priorities to focus attention on the most critical receivables.

QR payment integration

Every reminder automatically includes the Swiss QR payment code (QR-invoice ISO 20022), allowing the debtor to pay with a single click from e-banking. Reduces friction and accelerates collection.

Escalation procedure: from reminder to recovery

When reminders fail to produce results, a structured escalation path is needed. The Swiss procedure follows four progressive phases:

Phase 1 — Automated reminders (3 levels)

The three reminder levels described above are managed automatically by the system. The total duration is approximately 40–50 days from the due date. At this stage, 75–85% of overdue invoices are resolved without any manual intervention.

Phase 2 — Direct contact (personal dunning)

For receivables that resist automated reminders, an operator contacts the debtor directly by phone or email. The objective is to understand the reason for non-payment (dispute, financial difficulty, error) and negotiate a solution: instalment plan, discount for immediate payment, offset.

Phase 3 — Collection agency

If direct contact produces no results within 15–20 days, the receivable is referred to a collection agency (Inkasso). The agency acts on behalf of the creditor, charging commissions ranging from 10% to 25% of the recovered amount. The advantage is specialised expertise and formal pressure on the debtor.

Phase 4 — Legal action (DEBA enforcement)

As a last resort, the creditor initiates enforcement proceedings through the Debt Enforcement and Bankruptcy Office (Art. 67 DEBA): payment order, possible dismissal of objection and continuation of enforcement. Costs are borne by the debtor if enforcement is successful. For receivables above CHF 30,000, ordinary court action may be more effective.

Cash flow impact: before and after automation

Automating reminders has a measurable, direct impact on business liquidity. Here is the comparison between manual and automated management:

Before — manual management

Average DSO (Days Sales Outstanding) of 55–70 days: money stays locked in receivables for too long
5–8% of invoices permanently uncollectable per year, with direct impact on net profit
3–5 hours per week spent on manual reminders, phone calls and payment verification
Inconsistent reminders: some clients receive 5 reminders, others none — depending on who remembers
No real-time visibility on the ageing schedule: problems surface at month-end or quarter-end

After — automated reminders

DSO reduced to 35–45 days: 30–40% faster collection compared to manual management
Bad debt rate reduced to 1–3% thanks to timely, systematic reminders
Zero manual hours for routine reminders: staff focus only on critical cases
Every invoice receives the correct reminder at the right time, with no exceptions or oversights
Real-time dashboard with receivable ageing, risk indicators and collection forecasts

Practical tips for automated dunning

Set clear payment terms on every invoice and contract — 30 days net is the Swiss B2B standard, but you can negotiate shorter terms (10–15 days) with early payment discounts (2% for payment within 10 days)
Send the first reminder within 5–7 days of the due date, not weeks later: the probability of collection drops by 1% for every day the reminder is delayed, according to Euler Hermes
Customise the reminder tone by client segment: a long-standing major client deserves a different approach than a new client with small amounts
Always include the Swiss QR payment code (QR-invoice) in the reminder: removing payment friction is the most effective way to speed up collection
Monitor DSO (Days Sales Outstanding) as a monthly KPI and share it with your team: visibility creates accountability and enables timely interventions
Establish a default interest policy (Art. 104 CO: 5% per annum) and communicate it clearly in your general terms — not to punish the client, but to incentivise punctual payment
Use AccountEX to automate the entire dunning cycle: scheduled 3-level dispatch, default interest calculation, integrated QR-invoice and real-time ageing dashboard — reduce DSO and free up cash flow without manual work

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