Paying back taxes – individuals

This guidance is for individual taxpayers and the self-employed. Guidance on back taxes of corporate entities is available here.

Log in to MyTax to see how much back tax you must pay, when the due date is and what information you must include with the payment, or see your tax decision.

Your tax decision and the information for the payment will be available in MyTax in spring 2019. You will also receive them by post. However, if you have activated, you will no longer receive paper mail from Finnish public authorities. In that case, your decision and information will only be available in MyTax.

When do I need to pay back taxes?

The due dates for your back taxes will be in the time between July and February. Your due dates depend on the date when the Tax Administration completes your tax assessment. This varies from taxpayer to taxpayer. The end date of assessment depends on whether you or your spouse make changes to your pre-completed tax returns. The earliest day when a back tax can fall due is one month after the end date. Most individual taxpayers must pay their 2018 back taxes by 1 August 2019.

If the amount to pay is higher than €170, it is divided in two instalments. The second instalment’s due date is 2 months after that of the first instalment.

Check your personal due dates for back taxes in MyTax or in your tax decision. You can log in to MyTax with your online banking codes or with a mobile certificate.

Where can I get the information for making the payment?

All the information necessary for paying your back tax is available in MyTax – the Tax Administration’s bank account number, the reference number, the amount of back tax and the due date. This information is also on the tax decision and on the bank transfer forms that are enclosed with it.

See the guidance: Checking your back taxes and payment information in MyTax

How do I pay my back taxes?

You can pay your back taxes with the following methods of payment:

See the guidance: Paying back taxes in MyTax

When you pay in MyTax, the amount is debited from your bank account on the same day. You cannot change the due date.

Note: After you have paid the back tax, your payment is displayed in MyTax within 1 to 2 days.

Back taxes may accrue interest

Your back taxes are subject to late-payment interest with relief. The interest period begins on 1 February 2019 and continues up to the due date of the back tax concerned. The interest is included in the sum total that you see in MyTax and on your tax decision. The rate of late-payment interest with relief is 2% in 2019. However, we always deduct €20 from the interest that you have to pay (or we deduct the amount in its entirety if it is less than €20).

Frequently asked questions

The bank forms for back taxes are enclosed with the pre-completed tax return you receive in spring. However, if you have activated electronic messaging in, you will not receive them by post.

If you make no corrections or additions to your pre-completed return, the bank forms will remain in force. You should keep them and use them when it is time to pay the back taxes. However, if there are changes to your taxation that occur during the year, the Tax Administration will send you a new set of bank forms enclosed with a revised tax decision.

You can pay your back taxes in advance of the due date. However, please note that the reference number for your back taxes is the same as the shared reference number for all your income taxes. This means that we use the same reference number for the prepayments you may have to pay on your rental income or business income if you receive such income. If you send money to the Tax Administration, we will use it on your first upcoming income tax. In other words, if you must make a prepayment and the due date of that prepayment is before the due date of your back tax, your payment will be used on your prepayment, not the back tax.

Example: Your back tax is €1,000 and its due date is 3 December. In addition to this back tax, you must pay €100 in prepayments. The due date for that is 23 November. On 10 November, you make a payment, intending to settle your back tax in advance. Because the due date of the prepayment instalment comes first, the Tax Administration will take €100 of the amount you paid in and use it on the prepayment. The remaining €900 is used on the back tax. If you then pay €100 on 23 November, the due date of your prepayment instalment, the Tax Administration will use that on the back tax.

Yes, you can pay both instalments all at once. Both of them have the same reference number, so you can pay the sum total of both instalments as one single payment. This reference number is the same for all the income taxes of an individual taxpayer. You can see your personal reference number on the bank transfer forms or in MyTax. When you use the reference number, remember that it is a shared reference number for all income taxes, including your prepayments (if you are a payer of prepayments). This means that when you send us a payment with this reference number, we will use it on your first upcoming income tax.

When you pay back taxes, you must always use your reference number for income taxes. You can see it and the bank account number of the Tax Administration on your tax decision and in MyTax. If you pay back taxes in MyTax, the reference and bank account numbers are pre-filled.

The format of the reference number for back taxes is called RF. Enter the reference number in full, including the letters RF. If you cannot enter it in full, you can leave out the first four characters.

Sometimes you may be unable to enter the reference number. This may happen if you are using a foreign bank’s online service. In this case, you can enter it in the message field.

If you have paid too much, the Tax Administration will use the excess amount on your other income taxes. This is done in the order of their due dates, including upcoming instalments that will fall due soon. When all your income taxes have been settled, the remaining amount will be used on your other overdue taxes, such as real estate tax. If you do not have any debts in enforced recovery, your payment will automatically be refunded to your bank account.

Paid-in amounts are used on all your income taxes in the order of their due dates. For example, if you have an upcoming prepayment instalment that is due before the due date of your back tax, the Tax Administration will first use your payment on the prepayment. The remaining amount is used on the back tax. Read more about using a taxpayer’s payment for different taxes.


Starting in 2018, the Tax Administration gives credit for the prepayments that it has imposed on individual taxpayers. Prepayments are credited in the tax assessment for the year for which they were imposed. The credit is equal to the original value of the prepayment. This rule concerns both the prepayments imposed during the tax year, and those imposed after the end of the tax year if they relate to the same tax year.

This means that a prepayment imposed for a tax year will be credited in that year’s tax assessment even if the taxpayer has not paid it. For this reason, unpaid prepayments are no longer re-imposed on the taxpayer as a back tax.

However, if the taxpayer fails to make a prepayment, late-payment interest will be added to it, starting on the day after the due date, up to the date when the taxpayer pays it. The rate of late-payment interest is 7% in 2019. An unpaid prepayment may be transferred to the enforcement authorities for recovery.

If you have made prepayments that are not needed to cover your tax liability for that tax year, we will credit them to you by reducing your future prepayments. Unnecessary prepayment instalments will be cancelled. The Tax Administration will also cancel any unpaid prepayments, including any interest on them, if it turns out that they are not needed to cover the year’s taxes.

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