Correcting a payroll tax return: fixing errors without creating new ones
How to correct a payroll tax return within and after the filing deadline, what travels along with a subsequent return, and what the employee notices.
The short answer
If you discover an error in a payroll tax return, the route depends on one question: has the filing deadline for that period already passed?
If the deadline has not passed, you submit the return again, or send a supplementary return if your software supports it. If the deadline has passed, you send a correction along with the next return or a later one. The full rules are in chapter 14 of the Dutch Handboek Loonheffingen, which the Tax Administration updates annually.
More important than the mechanics is the realisation that a payroll tax return affects more than just the remittance. The data feeds the Dutch policy administration (polisadministratie) and helps determine what an employee is entitled to. A correction therefore restores not only an amount, but also a fact about a person.
What you correct, and what you do not
You correct factual inaccuracies: an incorrect wage amount, an incorrect withholding, a forgotten employee, an incorrect sector code or contribution, a wrong period.
Correcting is not the instrument for a difference of opinion about the tax treatment. If you believe an additional assessment is incorrect, an objection is the route. And a change that only occurred after the reference date is not an error but a new movement in the current period.
Within the filing deadline
As long as the deadline for the period has not passed, you fix the return yourself:
- Correct the error in the payroll administration, so the source is right and not just the return.
- Submit the return for that period again, or send a supplementary return if your package offers that option.
- Check whether the amount payable has changed and whether the payment has been adjusted accordingly.
- Record what you changed and why.
Mind the payment: an amended return without an adjusted payment creates a difference that has to be investigated again later.
After the filing deadline
If the deadline has passed, the correction travels along with a subsequent return. You therefore do not submit a separate return for the old period, but a correction attached to a return.
In practice that means:
- You correct the original period, with the right data per employee.
- The correction feeds through into the remittance for the period you send it with.
- The difference can result in either an amount payable or an amount receivable.
- With several errors in different periods you correct per period, not with one amount in the current month.
That last point is a common shortcut: writing the difference off in the current month. The remittance may then be right for the year, but the data per employee per period is not. And it is precisely that data which feeds the policy administration.
Corrections relating to a closed year
You can also correct after the end of a year. There are two points of attention.
The annual statement the employee received no longer matches after the correction. Provide a corrected annual statement and explain what has changed, so the employee knows what to use in their income tax return.
The impact on the employee can be greater than the amount suggests. A corrected wage can affect an ongoing benefit, allowances, or an application that was assessed on the basis of the old data.
So with corrections relating to a closed year, always inform the employer and agree who informs the employee.
What changes outside the return
Policy administration
The payroll tax return feeds the policy administration. Benefit agencies use that data. A correction to wages, employment or hours worked can therefore feed through into an assessment that has already been made.
Annual statement and income tax return
Corrections made after the annual statement has been issued call for a corrected copy. Do that proactively; the alternative is that the employee receives an assessment they do not understand.
Payment and settlement
A correction leads to an amount payable or receivable that is settled with a subsequent remittance. Post that in the books too, so the payroll liability in the ledger keeps reconciling. See the payroll reconciliation in Setting up the monthly close.
The errors corrected most often
| Error | How it arises | How you prevent it |
|---|---|---|
| Wrong sector code or contribution | The decision letter was not processed or was copied incorrectly | Annual check of the decision letter on receipt |
| Late termination of employment | The change arrives after the payroll run | A fixed submission date and alerts on missing changes |
| Allowance processed as gross pay | The allowance belonged under the work-related costs scheme | A fixed assessment of new allowance types, see Work-related costs scheme |
| Wrong tax table or tax credit | The employee's form was not processed | A check on complete data when employment starts |
| Incorrect hours | Hours from another system are not reconciled | Reconciliation between time registration and payroll processing |
| A change processed twice | Submission via two channels | One submission route per employer |
Workflow and record-keeping
Agree within the firm how a correction proceeds, so that two routes do not emerge:
- Record the error with the date and the source it appears from.
- Assess whether the filing deadline has passed and therefore which route applies.
- Fix the source in the payroll administration, not just the return.
- Send the correction with the next return, or submit the return again.
- Assess the consequences: the remittance, the entry in the ledger, the annual statement, the possible impact on the employee.
- Inform the employer, with an agreement on who informs the employee.
- Record everything in the file: what, when, which route, who decided.
Prevention: five checks before submission
- Comparison with the previous period per employee, on gross pay, net pay and withholdings. Investigate unexplained deviations first.
- Tick off the list of changes against what the employer submitted, including the answers to open questions.
- Starters and leavers checked for their dates and for complete data.
- New allowance types assessed before they go into the run.
- Reconciliation of the payroll journal entry with the return and the payment.
These checks belong in the standard process, see Automating payroll administration.
A worked example: correcting a closed year
In March it emerges that an employee left in October of the previous year, but that the termination was only processed in December. Wages were processed and payroll taxes remitted for November and December that should not have been.
Assessment. The filing deadlines for November and December have passed, so correcting travels along with a subsequent return. Two periods are involved, so two corrections.
Fixing the source. First the end date is corrected in the payroll administration, so the administration is right and the corrections follow from it.
Sending the corrections. With the next return, corrections for November and December of the old year are included, with the right data per period.
Consequences outside the return. The employee's annual statement no longer matches, so a corrected copy with an explanation follows. The net amounts wrongly paid are a civil matter between employer and employee; that reclaim is separate from the tax correction and calls for consultation with the employer.
Impact. The data in the policy administration changes. If the employee has since applied for a benefit, that assessment may have been based on the old data. Inform the employer about this, so they can bring the employee up to date.
Recording. The file records what was corrected, for which periods, when it was submitted, who decided, and what was agreed with the employer about the net reclaim and the communication.
What you agree with the employer
Corrections are almost always about information submitted too late. Three agreements limit that: a fixed submission date with a clear consequence, the rule that a termination is reported immediately and not at the next run, and one point of contact at the employer for questions during processing.
Also record who informs the employee about a correction that affects them. If that is not agreed, it often does not happen, and the question comes back to your firm months later.
Next step
Discuss your current correction process with a Giroo specialist: where changes get stuck today, which alerts are missing and which checks you can automate before submission.
Content reviewed: July 2026. Deadlines and procedures may change; for the exact rules consult chapter 14 of the current Handboek Loonheffingen and have borderline cases assessed by a payroll or tax specialist.