Dear Sir or Madam, Sole proprietors (and limited liability companies), on the basis of the Social Security Contribution Statement (contributions for pension and disability insurance, health insurance, parental care and employment), pay contributions, which are transmitted by the FURS to the individual entity (or natural person with an activity) via the national tax portal e-Taxes on the 10th of each month and published on the personal profile of the said portal. On the basis of the statement, the individual sole trader pays social security contributions, which are due by the 20th of the month for the previous month. At the same time, he/she also pays income tax, which is due on the 10th of the month and applies to the previous month (some also pay quarterly). The FURS also charges interest on daily late payment of contributions and income tax. The interest information sheet is located among all the other applications and should be placed in a prominent position to alert the payer to any late payment interest. The late payment interest is not communicated or reminded by the FURS, so that the payer does not even know that he/she is in the FURS' non-payers' database (even if it is only a few cents). The previous month's late payment interest should be calculated on the Social Security Statement itself, or on another related form, where the individual would know exactly how much interest is due, rather than having to calculate it independently with the attached Interest Information Calculator calculator calculator. It is difficult to know from the interest how much an individual has actually paid over a period of one year. Contributions are shown on the statement, but there is no such system for interest. At this point, it would make sense to also have interest on the returns, but this would be calculated in the next return. Business entities that issue invoices also include interest on late payment in the invoice specification in addition to other payments for services or products. The invoice payer pays the amount stated on the specification - exactly the amount and does not charge himself late payment interest if he misses the due date. He may, however, be charged late payment interest by the business entity, but this shall be charged on the invoice specified. It is almost inevitable that any late-payment interest should also be added to the social security contribution statement as a category, or made out in a separate statement, which, like the social security contribution statement, would be sent to the individual or by some kind of notification to the system. In most cases, the payer does not pay attention to late payment interest, calculates it incorrectly, calculates it differently from the FURS and, due to these factors, remains unwittingly in the non-payment database, despite very low late payment interest. At the same time, this would also give FURS a better overview of all interest paid. Regards.