Belgium’s SPF Finance has updated its guidance on Advance Income Tax Payments for Companies.

The quarterly advance payment deadlines for the 2025 tax year (2026 assessment year) are:

  • For the first quarter: no later than 10 April 2025;
  • For the second quarter: no later than 10 July 2025;
  • For the third quarter: no later than 10 October 2025;
  • For the fourth quarter: no later than 22 December 2025.

The update sets a surcharge rate of 6.75% for underpaid advance taxes in the 2025 tax year (YA 2026), down from 9.0% in the 2024 tax year (YA 2025).

The update outlines surcharge credit rates for timely advance tax payments for the 2025 tax year (YA 2026): 9% on the first payment, 7.5% on the second payment, 6% on the third payment, and 4.5% on the fourth payment.