From when do I need a Bulgarian VAT identification number?

There are two triggers, and the second is usually missed. Registration under the Bulgarian VAT Act becomes compulsory once domestic turnover exceeds 51,130 euros a year; the application then runs within seven days. Irrespective of any turnover threshold, anyone supplying services to businesses in other member states, or receiving such services from there, must be registered. A consultant with 30,000 euros of annual turnover and a single German client falls under this. The number then reads BG followed by the EIK; whether it is valid is shown by the European VIES confirmation service.