The Tax Procedure Code sets a penalty of 0.05 % of the assessed tax per day of delay for a late return, capped at 5 % of the assessed tax, and it only becomes payable once the delay exceeds 5 working days (
§ 250(1) of the Tax Procedure Code). Two situations are then easy to confuse. If you
file late, the penalty is
not charged at all where it would come to under CZK 1,000 (§ 250(3)). If you
never file, not even later while filing is still possible, the penalty is calculated at the upper limit of 5 % and is
always at least CZK 500 (§ 250(4)) — so the CZK 1,000 relief does not protect you in that case. The overall cap is CZK 300,000 (subsection 5), and the penalty is halved if you file within 30 days of the missed deadline and the tax office found no other delay that calendar year (subsection 7). For a non-monetary duty, such as late registration, the tax office may separately impose a penalty of up to CZK 500,000 (
§ 247a of the Tax Procedure Code). The exact amount always depends on the case history — see how we sequence the repair and reduce risk on
identified-person penalty and rescue.