| Type of Declaration | Declaration Deadline | Payment Deadline |
| Corporate Income Tax Declaration | No later than March 31st of the year following the tax period. | Quarterly installments: no later than the 30th of the last month of the quarter (March 30, June 30, September 30, December 30); or monthly installments: no later than the 15th of each month. |
| Annual Simplified Corporate Income Tax Return | No later than February 10th of the year following the tax period. | Quarterly installments of simplified profit tax for small businesses, by April 20, for the months: January, February, and March; by July 20, for the months: April, May, and June; by October 20, for the months of July, August, and September; and by December 20, for the months of October, November, and December. |
| Monthly Declaration of Personal Income Tax (Payroll Tax / TAP) | No later than the 20th day of the month following the tax period for taxpayers registered under Corporate Income Tax; for taxpayers registered under Simplified Corporate Income Tax, it is performed within the 20th day of the first month following the end of each calendar quarter. | No later than the 20th of the month following the tax period, for taxpayers registered with profit tax liability; for taxpayers registered with simplified profit tax liability, it is carried out by the 20th of the first month after the end of each calendar quarter. |
| Monthly Declaration of Social and Health Insurance Contributions | No later than the 20th day of the month following the tax period for taxpayers registered under Corporate Income Tax; for taxpayers registered under Simplified Corporate Income Tax, it is performed within the 20th day of the first month following the end of each calendar quarter. | No later than the 20th of the month following the tax period, for taxpayers registered with profit tax liability; for taxpayers registered with simplified profit tax liability, it is carried out by the 20th of the first month after the end of each calendar quarter. |
| Withholding Tax Declaration | No later than the 20th day of the following month. | No later than the 20th of the following month. |
| Value Added Tax (VAT) Declaration | No later than the 14th of the following month. | No later than the 14th of the following month. |
| Gambling Tax Declaration | No later than the 10th of the following month. | No later than the 10th of the following month. |
| National Taxes Declaration | No later than the 15th of the following month. | No later than the 15th of the following month. |
| National Fees Declaration | No later than the 15th of the following month. | No later than the 15th of the following month.
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Source: General Directorate of Taxes.