The self-employed and other individual taxpayers – requests in MyTax

Go to the Individual income tax section, select Tax card and prepayments 2026 and click Tax cards and prepayments.

Scroll down all the way. Select Change the prepayment under Prepayment 2025.

You can pay additional prepayments in two different ways. Choose the option most suitable for you:

1. You may have estimated how much will be enough to pre-pay additionally. In this case, you can enter an exact sum of money when submitting the request. Click Report the amount payable in the request for additional prepayment.
2. If you cannot estimate the exact additional prepayment, enter your actual amounts of income and deductions for the entire year. Click Report corrected income and deductions in the request. Complete the tax-card and prepayment request following these instructions, and MyTax will calculate the amount required: How to request prepayments — individual taxpayers

The request has 2 stages. You can see the stages in the breadcrumb trail at the top of the page.

Stage Request details:

Enter the amount of additional prepayment and select your reason for submitting the request. Typical reasons are “received rental income” and “sales profits and capital gains”.

Select a due date, a date in January.

In December, due dates can no longer be selected for the current year. The earliest due date that you can select is the first banking day in January. This means that if you request an additional prepayment at the beginning of December, you will in that case have to select a due date which is more than 3 weeks later in January.

Late-payment interest with relief is added to additional prepayments from 1 February.

The Preview and send stage: Please re-check all the information you entered. Click Edit or Previous to make corrections.

When everything is correct, click Submit. You get an acknowledgement of receipt.