Why payment terms matter more than the list price
In commercial relationships between Swiss SMEs, the agreed price is only part of the economic equation. Payment terms, cash discounts (Skonto), and late payment penalties directly affect liquidity, effective margin, and relationships with customers and suppliers. A 2% discount for payment within ten days can equate to an implicit annual return exceeding 30% — a figure many businesses underestimate when deciding whether to accept or offer it.
In Switzerland, the Code of Obligations (CO) establishes clear rules on default interest (Art. 104 CO), but leaves broad contractual latitude to define cash discounts, penalties, and reminder fees. The latter, however, require an explicit contractual basis and must remain proportionate. The goal is not to systematically punish commercial partners, but to create predictable incentives that accelerate collections without eroding margin or generating disputes.
This guide explains how to design balanced commercial terms, correctly handle discounts and penalties from an accounting and tax perspective, and monitor the impact on cash flow with management tools such as Accountex.
Swiss legal framework: CO, interest, and reminders
Before inserting clauses in general terms and conditions or invoices, it is essential to know the limits imposed by federal law:
| Aspect | Provision | Practical implications |
|---|---|---|
| Default interest | Art. 104 CO | In the absence of a contrary agreement: 5% per annum from the date of default (Art. 102 CO); between merchants, a higher rate if the ordinary bank discount rate exceeds 5% |
| Reminder costs | Contractual freedom / Art. 163 CO | Not provided for by law; permitted if agreed in writing in the GTC or contract with a specified amount; must be proportionate to the damage |
| Payment term | Art. 75 CO | If not agreed: payment due immediately; 30 days is common commercial practice, not a legal term |
| Penalty clause | Art. 160 et seq. CO | Permitted if proportionate; the court may reduce it if manifestly excessive |
| Cash discount | Contractual freedom | No legal obligation; must be explicitly stated in writing with precise deadline and percentage |
| VAT treatment | Art. 24 para. 1 and 41 VAT Act | Skonto reduces the taxable consideration if applied; default interest of a compensatory nature generally does not constitute taxable consideration |
A common mistake is to include elevated penalties or interest on invoices without a contractual basis: in such cases, only the statutory rate of 5% applies. For higher rates — for example 8% or 9% per annum, common in certain sectors — the clause must be clearly accepted by the debtor, ideally with contract signature or GTC approved in writing.
Cash discount (Skonto): structure, calculation, and when it pays off
Skonto is the most widespread tool for incentivising prompt payment. The typical formulation «2/10, net 30» means: 2% discount if paid within 10 days, otherwise the full amount within 30 days.
When it makes sense to offer it (seller's perspective)
It makes sense if the cost of capital or bank exposure exceeds the implicit rate of the discount, or if it significantly reduces the risk of insolvency. A 2% discount on a payment made 20 days ahead of the net term corresponds to approximately 37% per annum: very costly if the customer would pay on time anyway.
It is advisable to limit it to customers with a history of late payments or to high-value transactions where early cash receipt has strategic value.
When it makes sense to use it (buyer's perspective)
If liquidity is available, accepting Skonto is almost always advantageous compared to leaving cash in low-yield accounts. Always compare the implicit rate with the effective cost of short-term financing.
Caution: paying early solely for the discount can compress cash flow if many suppliers apply similar terms simultaneously.
Numerical example
Invoice of CHF 10,000 with terms 2/10, net 30. Payment on day 8: amount due CHF 9,800. Payment on day 25: CHF 10,000. The CHF 200 saving on a 22-day advance relative to net 30 equates to an annualised return of 33.2%. This calculation helps decide whether to negotiate longer terms in exchange for a slightly higher price.
Late payment penalties: what is lawful and what risks being voided
Late payment penalties serve to compensate for damage arising from failure to meet payment deadlines. In Switzerland they can take two main forms: default interest and flat-rate penalties. Both require contractual clarity and proportionality.
Contractual default interest must be calculated on the overdue principal, not on the entire invoice amount if only part is overdue. Established practice requires sending a formal reminder (Mahnung) stating the amount due, accrued interest, and a new deadline, before initiating legal proceedings.
| Instrument | Advantage | Risk / limitation |
|---|---|---|
| Statutory default interest (5%) | Applicable without a specific clause for monetary obligations | Modest amount; may not cover the administrative cost of recovery |
| Elevated contractual interest (8–9%) | Greater negotiating leverage and coverage of cost of capital | Requires written agreement; manifestly excessive amounts may be reduced by the court (Art. 163 CO) |
| Flat-rate penalty (fixed CHF) | Simple to communicate and account for | Must be proportionate to the damage; excessive penalties are contestable |
| Reminder fees (contractual) | Flat amounts (e.g. CHF 20–40) common if agreed in GTC | Without contractual basis they are not enforceable; higher amounts require proof of actual damage |
For SMEs, the most effective approach combines a reasonable contractual interest rate with a structured three-stage reminder process: informal reminder, formal reminder, threat of proceedings. Applying automatic penalties without notice deteriorates commercial relationships and reduces the likelihood of payment.
Accounting and VAT treatment
Cash discounts and late payment penalties have distinct accounting treatments under Swiss accounting standards (Swiss GAAP FER / micro-entity):
Skonto granted (seller's perspective)
- • Recorded as a reduction in revenue (Skonto expense account, e.g. 3800) at the time of payment
- • VAT is recalculated on the amount actually received
- • In Accountex, link the discount to the original invoice to maintain traceability of the receivable
Skonto received (buyer's perspective)
- • Reduces purchase cost (Skonto income account, e.g. 4800)
- • Input tax deduction is adjusted proportionally to the discount
- • Verify that the supplier issues a credit note or corrected invoice if the discount changes the VAT
Default interest received
- • Accounted for as financial income (account 6900 or similar)
- • Generally not subject to VAT if of a compensatory nature
- • Document separately from operating revenue for margin clarity
Default interest paid
- • Recorded as financial expense
- • Not deductible as operating cost of the product
- • Signal liquidity or credit management issues to monitor
Optimising terms without straining cash flow
The ideal balance between rapid collection and preserved liquidity is achieved with a differentiated strategy by counterparty type:
Segment customers and suppliers
Apply selective cash discounts to customers who regularly pay late or have high volume. For punctual customers, prefer longer net terms without discount: avoid giving away margin to those who would pay on time anyway.
Align inflows and outflows
If you offer Skonto to customers but pay suppliers on net 30, you create a liquidity gap. Negotiate mirror terms with key suppliers or use advance payment only when the implicit rate exceeds the cost of available capital.
Automate due date monitoring
Accounting software such as Accountex allows you to track Skonto deadlines, automatically calculate amounts due, and generate reminders. Automation reduces inadvertent delays and ensures consistency between contractual terms and accounting practice.
Measure DSO and Skonto effect
Monitor Days Sales Outstanding (DSO) before and after introducing cash discounts. If DSO does not improve despite Skonto, the cost of the discount erodes margin without liquidity benefit: a signal to review commercial policy.
Sample wording for invoices and general terms and conditions
Clear text prevents disputes. Here are adaptable templates, to be verified with your legal adviser for your sector:
Cash discount
«If payment is made within 10 days of the invoice date, we grant a 2% discount on the net amount. After that deadline, the full amount is due within 30 days.»
Default interest
«In the event of late payment, default interest at 8% per annum shall accrue on the overdue principal, pursuant to the contractual agreement and Art. 104 para. 2 CO, as well as reminder fees as agreed in these terms and conditions.»
Exclusion of Skonto on disputed amounts
«Cash discount does not apply to invoices subject to written dispute before the Skonto deadline.»
Operational checklist for SMEs
| Action | Frequency | Responsible |
|---|---|---|
| Verify that general terms and invoices consistently state Skonto and penalties | Annual / with each update | Management + legal adviser |
| Calculate the implicit Skonto rate before offering it | For each new commercial policy | Accounting / CFO |
| Account for Skonto and interest separately from operating revenue | With each payment | Accounting |
| Monitor DSO and Skonto utilisation rate | Monthly | Controlling |
| Send structured reminders within 5 days of due date | Ongoing | Credit management |
| Adjust VAT taxable base on invoices with Skonto applied | Quarterly (VAT return) | Accounting / fiduciary |
Conclusion: commercial terms as a management lever
Cash discounts and late payment penalties are not simply clauses to add at the bottom of an invoice: they are financial management tools that, when carefully calibrated, accelerate collections and protect margin. The key lies in knowing the limits of the CO, calculating the real cost of Skonto, applying penalties fairly, and systematically monitoring the effect on cash flow.
With integrated digital accounting — such as that offered by Accountex — it is possible to automate deadlines, reminders, and accounting entries, transforming payment terms from an operational risk into a measurable competitive advantage.