Generally, corporations have to pay their taxes in monthly  or quarterly instalment payments depending on incomes earned in the previous fiscal year. No advance tax  is payable if the total income is less than 300 000 BGN.

Corporations are responsible for calculating and remitting their own instalment payments. Аn interest  will be charged if the estimated advance tax instalments are lower with more than 20% to the year's actual tax or the instalments are not paid in time.  But in the same time a special declaration under Article 88 of CITA is providing an opportunity for companies to adjust the initially estimated tax. The corrective declaration should be submitted not later than December 15th of the current year. Particularly this means that advanced tax instalments could be calculated and submitted as “0” installment through the year and then at 15 December adjust forecast to a sum close to the expected real year tax.  In this case interests for previous months are not due.

Any remaining unpaid tax is payable on or before the balance-due day (31 March 2015).