Why uncollectible receivables require attention

A customer who does not pay, an invoice overdue for months, a bankruptcy with no prospect of recovery: for many Swiss SMEs, uncollectible receivables are not an exception but a concrete operational risk. The issue is not only accounting — every write-off affects margin, liquidity, the balance sheet, and tax position.

In Switzerland, simply removing an entry from the receivables ledger is not enough: clear criteria are needed to distinguish a payment delay from a doubtful receivable and, ultimately, from a receivable that is definitively uncollectible. Accounting rules (Swiss Code of Obligations and Swiss GAAP FER) and tax rules (profit tax, VAT) follow different logic that must be aligned carefully.

This guide explains when to impair or write off, which documents to retain, and how to reduce the tax impact without running risks in the event of an audit. The examples refer to corporations and partnerships using double-entry bookkeeping — the typical scenario for SMEs using accounting software such as Accountex.

Healthy, doubtful, and uncollectible receivables: three different situations

Before recording any write-off, it is essential to classify the receivable correctly. Confusing the stages leads to premature impairments (not tax-deductible) or late write-offs (profits taxed in excess).

Receivable status	Typical criteria	Accounting treatment	Tax effect (profit)
Receivables in good standing	Payment within terms or slight delay with no signs of insolvency	Carried at nominal value	No adjustment
Doubtful receivables	Debtor insolvency, insolvency proceedings, substantiated dispute, prolonged default despite reminders	Individual impairment or allowance (Wertberichtigung / Delkredere)	Deductible if the loss is probable and quantifiable
Uncollectible receivables	Bankruptcy with no dividend, statute of limitations, revocation without assets, certificate of irrecoverability	Final write-off to losses on receivables account	Deductible loss as operating expense

The transition from "doubtful" to "uncollectible" does not happen automatically when a deadline expires. What matters is concrete proof of the impossibility of recovery, not the age of the invoice alone.

When to write off: operational criteria for SMEs

A final write-off is justified when recovery of the receivable is definitively ruled out. In Swiss practice, the most common situations are:

1

Bankruptcy closed without dividends

The debtor has gone bankrupt and the insolvency proceedings have closed with a zero dividend or with a residual share that cannot be collected (minimal amounts often do not justify further action).

2

Composition proceedings (Nachlassverfahren)

The approved plan provides for a payment below the receivable amount and the balance is formally waived. The unrecovered amount may be written off.

3

Statute of limitations on the receivable

Receivables from customers arising from supplies or services between businesses generally become time-barred after 10 years (Art. 127 CO). Shorter periods (e.g. 5 years) apply only to specific categories, such as periodic services or certain professional activities (Art. 128 CO). Once the applicable period has elapsed without interruption of the limitation period, the receivable may be written off — subject to verification with legal counsel.

4

Untraceable debtor or debtor without assets

After documented recovery attempts (reminders, formal demand, possible legal action) and confirmation of the absence of attachable assets, a write-off is permissible even without formal bankruptcy.

As long as the receivable is only "at risk", it is advisable to limit yourself to a partial or full impairment without writing it off from the receivables ledger: if the debtor pays later, recovery can be recorded without complications.

Accounting entries: impairment and write-off

Entries depend on the chart of accounts and company policy, but the underlying logic remains the same:

Impairment (doubtful receivable)

The value of the receivable is reduced without removing it from the books. The allowance is typically posted to a contra-asset account (Delkredere) or recorded directly as a loss.

Debit: Losses on receivables / Receivables impairment
Credit: Allowance for receivables impairment

Final write-off (uncollectible receivable)

The receivable is removed from the customer ledger. If an allowance existed, it must first be released; the difference constitutes the actual loss.

Debit: Allowance (if applicable) + Losses on receivables
Credit: Trade receivables

For SMEs applying Swiss GAAP FER, the principles of measurement at nominal value apply (FER 2, in particular FER 2.8, 2.23, and 2.24). Flat-rate global impairments are permitted only if based on reliable and documented historical statistical data, with the related assumptions disclosed in the notes.

Documentation: what to retain for an audit

In the event of a tax audit or review, management must demonstrate that the write-off is not a manoeuvre to artificially reduce profit. The file for each written-off receivable should include:

•Source document: invoice, contract, order confirmation, and proof of delivery or performance
•Reminder history: payment reminders, formal demands, correspondence with the debtor
•Proof of insolvency: bankruptcy judgment, trustee's report, certificate of irrecoverability from the debt enforcement office, commercial register extract showing deletion
•Internal decision: management or board note approving the write-off, with date and amount
•Accounting entry: journal entries referencing the customer and invoice number, traceable in the accounting software

Retain documents for at least ten years, in line with record-keeping obligations under the Swiss Code of Obligations (Art. 958f CO). In Accountex, link notes and attachments directly to the entry or customer account to maintain traceability.

Tax impact: profit tax and VAT

Profit tax (federal and cantonal)

Losses on definitively uncollectible trade receivables are in principle deductible as operating expenses, provided they are real, justified, and correctly accounted for. Preventive impairments on doubtful receivables are likewise deductible if based on a reliable assessment of probable loss.

Caution: global allowances not supported by concrete data may be reclassified by the tax authorities as hidden reserves and added back to taxable profit. For corporations, deductibility follows the matching principle with revenue; for sole proprietorships and general partnerships, similar rules apply at cantonal level.

VAT: adjustment of input tax credit

If the original invoice included VAT and the receivable becomes definitively uncollectible, the creditor may adjust the tax liability by reducing the taxable consideration (Art. 41 VAT Act). The adjustment must be made in the accounting period in which the receivable is definitively written off or in which the event demonstrating irrecoverability occurs.

The VAT adjustment reduces tax due, but only on the amount actually not collected (net of any partial recoveries). If the debtor is a taxable business that previously deducted the tax, the Federal Tax Administration (FTA) may also adjust the deduction on the debtor's side (Art. 41 para. 2 VAT Act), for example in the event of bankruptcy or composition proceedings. Document the decision to adjust VAT or not, and verify it with your trustee, especially if the amount is material.

Flat-rate allowances vs individual impairment

Many SMEs wonder whether they can set aside a fixed percentage on overdue receivables. The answer depends on the empirical basis:

Method	When to use it	Advantages	Risks
Individual impairment	Identified at-risk customer receivables	Maximum precision, high tax acceptance	Requires case-by-case monitoring
Flat-rate allowance	Large receivables portfolio with stable loss history	Simplifies management and year-end closing	Deductibility may be challenged without solid statistics
Direct write-off	Certain and documented loss	No allowance to manage in subsequent periods	Irreversible; future recoveries must be accounted for separately

Prudent practice for SMEs: individual impairment for material receivables and flat-rate allowances only if supported by at least three years of consistent historical data, formalised in an internal accounting note.

Subsequent recoveries: what to do if the debtor pays after the write-off

It is not uncommon for a written-off receivable to generate a partial recovery — for example through a late dividend or a spontaneous payment. In this case:

Record the receipt as extraordinary income or a revenue item ("Recovery of written-off receivables" account), not as ordinary operating revenue.
If you previously adjusted VAT, check whether the tax must be adjusted again on the new receipt.
Update the receivables file documentation with proof of payment received.

This treatment ensures consistency across periods and avoids a double deduction of the same loss.

Prevention: reducing uncollectible receivables from the outset

Managing write-offs is necessary, but prevention is more efficient. Swiss SMEs can adopt simple measures with immediate effect:

Preventive controls

• Creditworthiness check on new customers (commercial register, certificate of no bankruptcy)
• Advance payments or deposits for material orders
• Credit limits per customer in the ERP system
• Penalty clauses and default interest in terms and conditions

Active monitoring

• Weekly aging report of overdue receivables
• Automatic reminders at 30, 60, and 90 days
• Internal escalation beyond an amount or delay threshold
• Timely impairment assessment, not only at year-end

Accounting software integrated with receivables management helps identify at-risk customers before the loss becomes definitive — reducing both operational stress and tax impact.

Operational checklist for writing off a receivable

Verified that the receivable is not recoverable (bankruptcy, statute of limitations, or proof of total insolvency)
Exhausted documented recovery attempts (reminders, formal demand, possible legal action)
Released any existing allowance before the final write-off
Recorded the accounting entry with reference to invoice and customer
Assessed VAT adjustment for the uncollected amount
Archived the complete documentation file in the accounting system
Notified the trustee for alignment with the tax return

Conclusion: accounting precision, tax protection

Uncollectible receivables are part of the ordinary management of every SME, but their treatment requires rigour. Distinguishing impairment from write-off, documenting every step, and aligning accounting, VAT, and the tax return protects the company from challenges and frees resources otherwise tied up in irrecoverable receivables.

With clear processes and accounting software that tracks customers, due dates, and adjustment entries, a write-off becomes a controlled operation — not a year-end emergency. For material amounts or complex situations (customer groups, VAT adjustments, prior periods), always consult your trustee before finalising the entries.