Why the debtor ledger should be kept clean
Over the course of financial years, many Swiss SMEs accumulate customer balances that remain open for months or years: unpaid invoices, unreconciled advance payments, uncredited credit notes, small residual amounts after partial payments. Over time, these amounts become "dormant": they no longer generate commercial activity, but continue to inflate current assets and distort indicators such as DSO and apparent liquidity.
Under the Code of Obligations (CO), receivables must be prudently valued at nominal value, adjusted for necessary impairment losses (Art. 960 and 960a CO). Swiss accounting standards (Swiss GAAP FER) and audit practice also require an individual assessment of debtors: it is not enough to wait until year-end to discover that a significant portion of trade receivables is no longer collectible.
This guide explains how to distinguish a temporarily outstanding balance from a structurally at-risk receivable, when to provision for impairment, when to definitively write off an item, and how to document each step for internal audit, external audit, and tax purposes.
How to identify dormant balances and at-risk receivables
A customer balance is not "dormant" simply because it is old. Before provisioning or writing off, it must be classified using objective and consistent criteria:
| Signal | Interpretation | Typical action |
|---|---|---|
| Invoice overdue for more than 90 days, reminders ignored | Payment delay — receivable still enforceable | Formal reminder, possible default interest |
| Customer in bankruptcy or composition proceedings (Art. 191a et seq. CO) | Partial or no recovery likely | Targeted provision; filing in insolvency proceedings |
| No commercial contact for more than 24 months | Balance probably forgotten by both parties | Administrative review and proposal for offset or write-off |
| Residual amount below CHF 50 after partial payment | Rounding error or recovery cost exceeds receivable | Controlled write-off with documented internal approval |
| Customer advance payment not allocated to invoices | De facto liability — not a receivable | Reclassification to advance payments / liabilities to customers account |
| Receivable limitation period expired (Art. 127 CO: 10 years for commercial receivables; 5 years for periodic services and cases under Art. 128 CO) | Right of action extinguished — unless limitation interrupted | Accounting and tax write-off of time-barred receivable |
Practical tip: generate an "aging report" monthly (due-date schedule by buckets: 0–30, 31–60, 61–90, 91–180, over 180 days) and cross-reference it with the customer's last commercial transaction. In Accountex, bank reconciliation and the customer account statement make it immediately visible which items have not moved for too long.
Provision, write off, or recover: which path to choose
The three operations have different accounting, tax, and reporting effects. Confusing them is one of the most common errors in SMEs:
Provision (impairment)
Used when the receivable remains legally valid but recovery is uncertain. A provision for credit losses (current asset impairment account) is recorded, reducing the net value of the receivable on the balance sheet.
Reversible if the customer pays subsequently. Does not close the item in the debtor ledger.
Write-off (reversal)
Used when the receivable is definitively lost: bankruptcy with no dividend, expired limitation period, documented waiver of the receivable, trivial amount with disproportionate recovery cost.
The item is closed in the accounts with a charge to credit losses. Normally an irreversible operation.
Active recovery
Before provisioning or writing off, assess recovery options: escalated reminders, formal demand with deadline (Art. 102 CO), enforcement and payment order proceedings (LEF), attachment, or participation in a composition agreement.
Legal recovery costs are normally charged to period expenses, depending on materiality and company policy.
Accounting entries under Swiss GAAP FER
SMEs applying Swiss GAAP FER ("SME" category or above) must comply with the prudence principle and individual valuation. Here are the most commonly used accounting entries:
| Operation | Debit account | Credit account | Balance sheet effect |
|---|---|---|---|
| 30% provision on doubtful receivable | Credit impairment (P&L, e.g. 69xx) | Provision for receivables (contra-asset, e.g. 1109) | Reduces profit and net receivable value |
| Write-off of receivable already 100% provisioned | Provision for receivables (1109) | Trade receivables (1100) | Closes item without further P&L impact |
| Direct write-off (without prior provision) | Credit losses (69xx) | Trade receivables (1100) | Immediate charge to P&L |
| Recovery after provision | Bank (1020) + Provision for receivables (1109) | Trade receivables (1100) + Income from reversal of impairment | Partial or full restoration of receivable |
| Reclassification of unused advance payment | Trade receivables (1100) | Customer advance payments (liability, e.g. 2270) | Corrects asset/liability classification error |
For companies keeping simplified accounts under Art. 957 et seq. CO (micro-enterprises), the same prudence principles apply, but with less account detail. What matters is that every write-off is justified, dated, and linked to the internal decision document.
Tax implications: profit tax and VAT
Profit tax (direct federal tax and cantonal tax): under Art. 63 LIFD (and Art. 72 cantonal tax law), provisions for credit losses are generally deductible if based on a concrete assessment: significant debtors must be analysed individually, while for the residual balance, FTA practice generally allows a flat-rate del credere of 5% for Swiss debtors and 10% for foreign ones (except receivables from public entities, guaranteed receivables, or intercompany receivables). An indiscriminate provision across the entire portfolio, without distinguishing individual risks, remains open to tax challenge.
The definitive write-off of a receivable produces a deductible expense in the financial year in which the receivable is recognised as uncollectible. If the receivable was already 100% provisioned, the write-off does not generate a further expense. In case of subsequent recovery, the income is taxable in the year of collection.
VAT: pay attention to the distinction between discount, credit loss, and invoice reversal. A credit loss (customer does not pay) does not automatically entitle you to VAT recovery: the tax is due to the tax authority at the time of invoicing. The tax liability must be adjusted only if the consideration is actually corrected, under Art. 41 VAT Act (e.g. credit note or cancellation of the service). An internal accounting write-off does not equate to a VAT adjustment: for material amounts, check with your tax adviser whether to proceed with an adjustment or offset in the tax return.
Limitation: a time-barred commercial receivable (Art. 127 CO) may be written off in the accounts. From a tax perspective, the expense is deductible in the year of write-off, provided the limitation period has actually expired and there are no interruptive acts (acknowledgement of debt, partial payment, legal proceedings).
Five-step operational procedure for SMEs
Extraction and analysis
At quarter-end (or at least at year-end), extract a list of all customer balances with a non-zero balance. Filter by amount, age, and last transaction. Flag items below the materiality threshold defined by management (e.g. CHF 100 or CHF 500).
Commercial verification
The administrative or sales department verifies the status of each flagged item: is the contract still valid? Was the goods delivered? Is there an open dispute? Is an advance payment to be refunded? Document the answer in a note on the customer account.
Decision and approval
For each item, classify the action (retain, provision, write off, pursue legal recovery). Write-offs must be approved according to authorised signatories (e.g. manager + accounting for amounts above threshold). Avoid a single operator closing items without oversight.
Accounting entry
Post the entries with reference to the customer, original invoice number, and decision log. For provisions, state the percentage and reason (bankruptcy, dispute, prolonged inactivity). Close written-off items with reason code "credit loss" or "limitation period".
Monitoring and year-end close
Before annual close, repeat the analysis on remaining balances. Present the auditor with a summary schedule: gross receivables, provisions, movements during the year, write-offs and recoveries. This document is the basis for the notes to the financial statements on receivables and for the tax return.
Documentation and traceability for audit
The auditor (internal or external) will assess whether write-offs are prudent, justified, and correctly classified. For each written-off or provisioned item, retain:
- •Original invoice and reminder history (email, registered mail, formal demand)
- •Bankruptcy certificate or composition agreement resolution from the competent court, if applicable
- •Limitation calculation with expiry date and verification of absence of interruptive acts
- •Internal resolution or approval email from manager / board of directors
- •Accounting entry with cross-reference to the decision log
Notes to the financial statements
In the financial statements, receivables must be presented at net value (gross minus provisions). If write-offs during the year are material relative to equity or profit, a brief explanation in the notes (Swiss GAAP FER 3/5 and 6) increases transparency for banks, investors, and business partners.
Common mistakes to avoid
Writing off without attempting recovery
Writing off material receivables without documented reminders exposes you to tax challenges and audit issues. Even a reminder email preserves a record of the recovery attempt.
Confusing advance payments with receivables
An advance payment received and not invoiced is a liability, not a receivable to write off. Correct reclassification avoids artificially inflating credit losses.
Undocumented flat-rate provisions
Applying a fixed percentage across the entire portfolio without individual assessment of material debtors is tax fragile. Under Swiss GAAP FER, the residual balance may instead be impaired on a flat-rate basis after case-by-case analysis (FER 2/24), in line with tax practice on residual risk.
Ignoring VAT effects
Closing an invoice in general ledger without checking VAT consequences can create inconsistencies in quarterly returns and VAT breakdowns.
Year-end closing checklist
| Check | Completed |
|---|---|
| Aging report updated and analysed by due-date buckets | ☐ |
| Items with balance below materiality threshold identified | ☐ |
| Individual provisions recorded and documented | ☐ |
| Write-offs approved with supporting documentation attached | ☐ |
| Customer advance payments correctly reclassified | ☐ |
| VAT effects verified with tax adviser | ☐ |
| Net receivables schedule prepared for auditor and notes to financial statements | ☐ |
A clean debtor ledger is a management advantage
Periodically cleaning up the customer ledger is not merely an accounting exercise: it restores an accurate picture of realisable liquidity, reduces the risk of overstating current assets, and simplifies relationships with banks and auditors. The key is a structured process — identification, verification, documented decision, correct posting — applied consistently on a quarterly basis rather than in a year-end emergency.
With a tool like Accountex, aging reports, customer account statements, and integrated bank reconciliation speed up the identification of dormant balances and ensure every write-off remains traceable. For material amounts or insolvency situations, always involve your fiduciary or auditor before definitive write-off: accounting prudence today avoids tax challenges tomorrow.