HR-Glossar
Lohnsteuer-Außenprüfung (payroll tax audit)
How the German payroll tax audit works, which matters it concentrates on and when the employer is liable for tax it failed to withhold.
1. What is Lohnsteuer-Außenprüfung (payroll tax audit)?
The Lohnsteuer-Außenprüfung is the audit of wage tax withholding at the employer by the tax office for its place of business. The legal basis is Section 42f EStG; the general rules of the Fiscal Code on external audits apply in addition, in particular Sections 193 and 200 AO.
What is audited is not the employees' tax liability but the performance of the employer's duties: whether the wage tax deduction characteristics were applied correctly, all taxable pay was captured, tax-free payments were rightly left untaxed, and the amounts withheld were declared and remitted.
That makes the audit directly relevant to the employer in financial terms. Where tax is demanded retrospectively, the liability under Section 42d EStG falls on the employer first – not on the employee. A group treating withheld tax as a pass-through item is therefore mispricing this risk: an assessment here is the employer's own cost.
2. Origin and development
Wage tax withholding is unusual in construction: the employer collects someone else's tax debt, calculates it itself and remits it. The tax office sees the result only in aggregate – the payroll tax return states totals, not facts.
The external audit is the answer to that construction. Without it there would be no way to establish whether a payment treated as tax-free actually was. It therefore starts not with the return but with the payroll ledger and the underlying records.
With the digitalisation of payroll, audit practice has shifted. What is examined today is data, not folders – with analyses across every employee and every month. An error that formerly surfaced in a sample is now found in full, and that changes the order of magnitude of assessments considerably.
3. Core principles and how it works
The employer is audited, not the employee
The subject matter is the employer's duties in withholding. The employees' own assessments are unaffected.
The payroll ledger is the point of access
The audit starts with the records under Section 41 EStG and Section 4 LStDV. Keeping them completely shortens the audit considerably – not keeping them lengthens it.
Employer liability under Section 42d EStG
The employer is liable for wage tax withheld in too small an amount. The tax office may turn to the employer or to the employee; in practice it regularly chooses the employer, because that is where one contact covers many cases.
The focus is on tax-free and flat-rate payments
Travel expenses, premiums under Section 3b EStG, benefits in kind, company cars, small gifts, company events: the audit interest lies wherever tax exemption or flat-rate taxation is claimed – not in ordinary basic pay.
Digital data access is standard
Under the rules of the Fiscal Code the audit may inspect the stored data and analyse them by machine. Providing them only as a printout or PDF does not satisfy this.
4. Who is Lohnsteuer-Außenprüfung (payroll tax audit) relevant for?
- All employers – any place of business can be audited, regardless of size. - Payroll teams – they provide the records and answer the questions of fact. - Management – liability under Section 42d EStG hits the company directly and is not merely a technical question. - Businesses with many tax-free components – field sales, shift operations, a company car fleet: audit density is highest there. - Companies with outsourced payroll – the audit takes place at the employer, even where the data sit with the provider.
5. How it differs from related terms
- Payroll tax audit and pension insurance employer audit – two separate audits with different auditors, legal bases and outcomes. They frequently examine the same facts against different yardsticks: a payment free of tax is not automatically free of contributions. - Payroll tax audit and general tax audit – the general audit concerns company taxes; the payroll tax audit only wage tax withholding. They can coincide but are independent. - Audit and binding ruling – Section 42e EStG allows a set of facts to be clarified in advance with binding effect. A ruling given binds the tax office in the later audit. - Liability and retrospective demand – the employer can be pursued as a liable party under Section 42d EStG or by way of a retrospective demand; the choice affects whether recourse against the employee remains possible.
6. Variants and adaptations
Occasion and scope differ:
- Routine audit – without a particular trigger. There is no statutory fixed cycle; the frequency follows from company size and risk assessment. - Triggered audit – prompted for instance by control notifications, anomalies in the returns or findings from another audit. - Joint audit with the pension insurance – coordinated in certain constellations but legally separate. - Wage tax spot check under Section 42g EStG – not an audit procedure in the strict sense but an unannounced measure to establish facts of tax relevance. It can turn into a full audit.
7. Advantages and challenges
Advantages
- Where records are clean, it confirms your own practice and creates certainty for later years
- It settles disputed matters with binding effect instead of carrying them for years
- It uncovers systematic errors while they can still be corrected
- The binding ruling under Section 42e EStG allows risks to be cleared in advance
- A well-kept payroll ledger shortens the audit to a few days
Challenges
- Retrospective demands hit the employer, not the employee
- Systematic errors work across every employee and every audited year at once
- Recourse against employees is limited in employment law and often excluded in practice
- The audit ties up payroll capacity for weeks
- With outsourced payroll, providing the data is organisationally demanding
8. Best practices for implementation
Clarify disputed matters in advance rather than defending them afterwards
The binding ruling under Section 42e EStG is free of charge and binds the tax office. For any matter whose tax treatment is doubtful and which affects many employees, it is the most economically sensible step. For group benefit schemes rolled out across countries, it is the instrument to use before the rollout, not after.
Record tax-free payments with their basis and supporting evidence
Tax-free without a legal basis and without an underlying document is, at an audit, an assessment. The evidence arises at the time of payment, not at the time of the audit.
Test digital data access before the audit
Whether the data can be provided in machine-analysable form should not be attempted for the first time on day one of the audit – particularly after a change of system.
Set up and document an internal control system
A demonstrably established control system can be decisive on the question whether an error was intentional or careless – and therefore on surcharges and criminal consequences.
9. Tips for employers and employees
For employers
- **Use the binding ruling** – Section 42e EStG binds the tax office and costs nothing
- **Know the focus areas** – travel expenses, benefits in kind, company cars, premiums under Section 3b EStG
- **Recourse against employees is rarely enforceable** – budget for the liability as your own
- **Answer auditor questions in writing** – oral answers in the room are remembered differently later
For employees
- **The audit is not directed at you** – what is audited are the employer's duties
- **Retrospective taxation can still reach you** – for instance where amounts were reimbursed tax-free without justification
- **Keep your own evidence** – travel expense claims and receipts can become relevant later
- **Ask about corrections** – an amended annual payroll tax record affects your own assessment
10. Conclusion
The payroll tax audit examines the employer, not the employees – and it starts with the payroll ledger, not with the return. Its focus lies wherever tax exemption or flat-rate taxation is claimed: travel expenses, benefits in kind, company cars, premiums under Section 3b EStG.
Financially, the liability rule in Section 42d EStG is what matters. The demand is made against the employer, and recourse against the employee is limited in employment law and usually excluded in practice. Because the audit now analyses data rather than taking samples, a systematic error works across every employee and every audited year at once – which is why assessments often turn out surprisingly high.
The most effective lever therefore sits before the audit: the binding ruling under Section 42e EStG. It is free of charge, binds the tax office and clears exactly those matters that would otherwise remain a risk for years. For an international group this is the instrument to reach for when a benefit scheme designed elsewhere is brought into Germany, because whether it is tax-free here is a question that can be answered in advance rather than discovered in an audit.
A note on sources: there is no official English version of the Income Tax Act, the LStDV or the Fiscal Code; the German texts are cited below and their wording governs.
Sources
- Section 42f EStG – Payroll tax audit (German original; no official English version) (opens in a new tab)
- Section 42d EStG – Employer liability (German original) (opens in a new tab)
- Section 42e EStG – Binding ruling on wage tax (German original) (opens in a new tab)
- Section 193 AO – Admissibility of an external audit (German original) (opens in a new tab)
- Section 200 AO – Duties of cooperation of the taxpayer (German original) (opens in a new tab)
- Section 41 EStG – Record-keeping obligations for wage tax (German original) (opens in a new tab)
- Section 42g EStG – Wage tax spot check (German original) (opens in a new tab)
Related terms
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