How to correct a Dutch VAT return (btw-suppletie)

How do you correct a Dutch VAT return?

You correct a Dutch VAT return in one of two ways. You correct a small slip in your next return. A larger one needs a separate suppletie form. A suppletie is the separate form you file for that correction.

Both routes fix a VAT return you have already filed. This page is about that fix, not about filing in the first place. Our page on the Dutch VAT return covers how to file it. For the basics, our guide to VAT in the Netherlands explains what VAT is.

It is also not the same as correcting your income tax. That has its own route, which we explain in correcting your Dutch tax return. And it is not the ICP declaration, covered on our ICP declaration page.

Take Farah. She is a freelance designer who files her own quarterly VAT return. Weeks later she spots an invoice she forgot to include. We follow her through this page.

Small correction or big correction? The €1,000 rule

The €1,000 rule decides which route you take.¹ A correction of €1,000 or less goes into your next VAT return. More than €1,000 needs a separate suppletie.

The €1,000 is the amount of VAT involved, not the invoice value. It counts whether you paid too much or too little. When you offset €1,000 or less in your next return, the Belastingdienst sends no separate decision for it. You get no extra tax bill (a naheffingsaanslag) and no separate refund decision (a teruggaafbeschikking). It settles quietly inside the next return.

Farah's case fits this first route. Her forgotten invoice means she declared a little too little VAT. Because the amount is under €1,000, she can simply add it to her next quarter.

One case is different: the old small businesses scheme (KOR). The table below shows both routes and that exception.

What are the deadlines, interest and penalties?

You have five years to correct, but act fast once a suppletie is needed. You can correct a return up to and including five years after the year it relates to. A 2024 period runs until the end of 2029.

Is the correction above €1,000? Then you must file a suppletie. Every suppletie carries a tighter deadline. Send the suppletie as soon as possible, and within eight weeks of finding the error. This eight-week deadline is new since 1 January 2025. Before then the rule was only "as soon as possible".

The Belastingdienst can charge interest (belastingrente) on VAT you still owe. In 2026 that rate is 5%.² There are two windows where it charges nothing. You pay no belastingrente if you correct under-declared VAT within the same year. You also pay none if you file the suppletie within three months after the year ends.

A fine is possible, but it is not automatic. Correct voluntarily and on time. Then a vergrijpboete is normally not on the table. A vergrijpboete is a fine for a serious offence. It can follow if you skip a required suppletie or file it late. That takes gross negligence or intent on your side. The fine can then reach 100% of the VAT involved.⁴ Missing the eight-week deadline does not by itself mean a 100% fine. Does the Belastingdienst find the error before you correct it? Then your correction no longer counts as voluntary and a fine can follow. A verzuimboete is a fine for missing a deadline. It is 5% of the VAT you correct late. It does not apply when the extra VAT is €20,000 or less. It also does not apply when the extra VAT is under 10% of the VAT you paid.³ The Belastingdienst sets the exact figure for your case. Our reviewer confirms the current rules with you.

The threshold, deadlines and belastingrente rate sit in the table below.

How do you file a VAT correction?

How you file depends on your route. A small correction goes into your next return. A larger one uses the suppletie form.

For the next-return route, you add the corrected amount to the right box of your next VAT return. That is all it takes. Farah does exactly this. Her forgotten invoice is under €1,000, so she adds it to her next quarter and files within the year. The Belastingdienst charges her no belastingrente, and there is no separate decision. A correction to the old KOR always uses the suppletie route, whatever the amount.

For the suppletie route, you go to Mijn Belastingdienst Zakelijk. Open the VAT section, choose "correctie btw-aangifte" and complete the form called "Suppletie btw". Your own or your advisor's software can send it too.

After a suppletie, you wait for the Belastingdienst to respond. If you owe VAT, the Belastingdienst sends a naheffingsaanslag within eight weeks or so. You pay once you receive it. If the Belastingdienst owes you VAT, it sends a teruggaafbeschikking within eight weeks.

Made a mistake on the form itself? Do not file a second one. Wait for the assessment or the refund decision, then object within six weeks of its date.

What does this mean for you?

A VAT slip is fixable, and the route follows one number, with one exception. Up to €1,000 goes into your next return. Above it you file a suppletie. Every suppletie runs on an eight-week clock from the day you find the error. A KOR correction takes that route at any amount.

So confirm the amount first. Then note the day you found the error, because the eight-week clock starts there. And correct before the year ends where you can, so the Belastingdienst charges no belastingrente.

We review your whole VAT position, not just the one error. Then we file the correction with you. Farah adds her invoice, notes the date and stays within the deadline. Our page on the Dutch VAT return covers the return itself.