Paying tax differences when the tax submission deadline has been extended?

Hello Everyone,

I have received the following letter containing a QR invoice for paying the difference between calculated taxes and installments I have paid in 2023:

However, I’ve have extended deadline for submitting taxes for the year 2023. So at the moment I am unsure about how much additional I have to pay (in worst case, I belive it won’t be more than 5-10k).

Does anyone know if the deadline mentioned in this letter, March 31, 2024, is still applicable for those who have extended their tax filing deadline?

As this is first time I have received such letter, I just want to make sure I understand all aspects / implications.

Thank you in advance!

It’s just if to avoid paying interests on the amount due.


I don’t know if it’s the same in all Cantons, but my understanding is that this is a bill and the payment is due. High interests start running from April 1.

The extension of the submission deadline doesn’t change anything to this payment deadline. If after completing your return you realize that the taxable income is higher, then you can ask for a new bill so you can pay the difference, but the interests on the difference will still run from April 1 even if the bill comes, say, in May or June.

You can also estimate the taxable income before the end of March and ask for a new bill if the difference is anticipated to be significant. If you paid too much, you will be reimbursed, but at least you will have avoided the high interests.

In Vaud, the interests are not high in this case, as you only needs to pay the intérêts compensatoires (0.325%) until the final bill. Then you have 30 days to pay before you have to pay 4.75% (intérêts moratoires)