https://www.epo.org/en/service-support/faq/applying-patent/validation-system/what-happens-if-i-dont-pay-validation-fee
What happens if I don't pay the validation fee on time?
If the payment deadline is missed, the validation fee may still be paid to the EPO within an additional two months with a 50% surcharge. If the validation fee is not paid within this time, the validation request is deemed withdrawn and the option for validation is no longer available.